KR20230069660A - Electronic device and method for reselection a cell based on a priority in the electronic device - Google Patents

Abstract

According to an embodiment, an electronic device may comprise at least one antenna module and at least one communication processor for communicating with a communication network via the at least one antenna module, wherein the at least one communication processor is configured to: identify a cell reselection priority of a serving cell and a cell reselection priority of a target cell on the basis of detecting a trigger for cell reselection; identify whether the target cell is the same as a previous serving cell; identify, based on the target cell being identified to be the same as the previous serving cell, a first threshold for cell reselection set for the serving cell corresponding to the identified cell reselection priorities, and a second threshold for cell reselection set in the target cell corresponding to the identified cell reselection priorities; and determine whether to perform cell reselection for the target cell on the basis of a comparison result between the first threshold value and the second threshold value. Various other embodiments are possible. According to the present invention, a ping-pong phenomenon, which is caused by repeated cell reselection between cells with different priorities, can be prevented.

Description

Electronic device and method for reselecting a cell based on priority in an electronic device

Various embodiments relate to an electronic device and a method of reselecting a cell based on priority in the electronic device.

As the use of portable terminals providing various functions has become common due to the development of mobile communication technology, efforts are being made to develop 5G communication systems to meet the growing demand for wireless data traffic. In order to achieve a high data rate, the 5G communication system uses a higher frequency band (eg For example, implementation in the 25 to 60 GHz band) is being considered.

For example, in order to mitigate the path loss of radio waves and increase the propagation distance of radio waves in the mmWave band, beamforming, massive MIMO, and full dimensional MIMO; FD-MIMO), array antenna, analog beam-forming, and large scale antenna technologies are being discussed.

An electronic device (eg, a user equipment (UE)) may select a cell and camp on the selected cell. For example, in ^3rd generation partnership project (3GPP) technical specification (TS) 36.304 or 3GPP TS 38.304, a criterion for selecting a cell may be disclosed, and the electronic device selects a cell based on the criterion. You can select and camp on the selected cell. The electronic device may first attempt to search for a suitable cell. However, when an appropriate cell is not searched for or when there is no SIM, the user device may enter an any cell selection state. In an arbitrary cell selection state, the electronic device may camp on an acceptable cell that satisfies a cell selection criterion and is not barred.

After the electronic device camps on a specific cell based on the cell selection criterion, it may check whether the cell is reselected with respect to at least one adjacent target cell. When the electronic device determines that a cell reselection condition specified for a specific target cell is satisfied, the electronic device may perform cell reselection to the target cell to camp on.

The electronic device may perform a cell reselection evaluation procedure for at least one target cell according to 3 ^rd generation partnership project (3GPP) technical specification (TS) 36.304 or 3GPP TS 38.304 while camping on a specific cell. there is.

For example, a priority for cell reselection (eg, “cellReselectionPriority”) may be set for a serving cell where the electronic device currently camps and at least one target cell, and the set priority for cell reselection is Based on 3GPP TS 36.304 or 3GPP TS 38.304, it may be considered during the cell reselection evaluation procedure. When priorities for cell reselection of the serving cell and the at least one target cell are different, different criteria may be applied during the cell reselection evaluation procedure. For example, a criterion for cell reselection from a cell with a relatively high priority to a cell with a low priority may be different from a criterion for reselecting a cell from a cell with a relatively low priority to a cell with a high priority. . In this case, the electronic device may generate a ping-pong phenomenon in which a cell reselection procedure is repeatedly performed between a cell having a relatively high priority and a cell having a relatively low priority under a specific circumstance.

An electronic device and an operating method thereof according to various embodiments may apply different criteria for cell reselection when a target cell is the same as a previous serving cell in performing a cell reselection procedure between cells having different priorities. An electronic device and a method of reselecting a cell based on priority may be provided in the electronic device.

According to various embodiments, an electronic device may include at least one antenna module; and at least one communication processor for communicating with a communication network through the at least one antenna module, wherein the at least one communication processor, based on detecting a trigger for cell reselection, performs cell reconfiguration of a serving cell. Check the selection priority and cell reselection priority of the target cell, check whether the target cell is the same as the previous serving cell, and based on the confirmation that the target cell is the same as the previous serving cell, A first threshold for cell reselection set in the serving cell corresponding to cell reselection priorities, and a second threshold for cell reselection set in the target cell corresponding to the confirmed cell reselection priorities. value, and based on a comparison result between the first threshold and the second threshold, it may be set to determine whether to reselect a cell for the target cell.

According to various embodiments, a method of operating an electronic device may include a cell reselection priority of a serving cell and a cell of a target cell based on detecting a trigger for cell reselection in a method for reselecting a cell in an electronic device. Checking reselection priority; Checking whether the target cell is the same as a previous serving cell; Based on the confirmation that the target cell is the same as the previous serving cell, a first threshold for cell reselection set in the serving cell corresponding to the identified cell reselection priorities, and the identified cell reselection checking a second threshold for cell reselection set in the target cell corresponding to priorities; and determining whether to reselect a cell for the target cell based on a comparison result between the first threshold and the second threshold.

According to various embodiments, in performing a cell reselection procedure between cells having different priorities, when a target cell is the same as a previous serving cell, a criterion for cell reselection is applied differently, thereby repeatedly performing cell reselection between cells having different priorities. A ping-pong phenomenon due to cell reselection can be prevented.

1 is a block diagram of an electronic device in a network environment, according to various embodiments.
2A is a block diagram of an electronic device for supporting legacy network communication and 5G network communication according to various embodiments.
2B is a block diagram of an electronic device for supporting legacy network communication and 5G network communication according to various embodiments.
3A and 3B are diagrams for explaining an electronic device state and state transition according to various embodiments.
4 is a flowchart illustrating an operating method of an electronic device according to various embodiments.
5 is a diagram for explaining a cell reselection method of an electronic device according to various embodiments.
6 is a diagram for checking whether an electronic device satisfies a cell reselection condition according to various embodiments.
7 is a flowchart illustrating a method of operating an electronic device according to various embodiments.
8 is a flowchart illustrating a method of operating an electronic device according to various embodiments.
9 is a diagram illustrating an example of determining whether an electronic device satisfies a cell reselection condition according to various embodiments.
10 is a flowchart illustrating an operating method of an electronic device according to various embodiments.
11 is a diagram illustrating an example of determining whether an electronic device satisfies a cell reselection condition according to various embodiments.
12 is a diagram illustrating an example of determining whether an electronic device satisfies a cell reselection condition according to various embodiments.
13 is a diagram illustrating an example of determining whether an electronic device satisfies a cell reselection condition according to various embodiments.
14 is a flowchart illustrating a method of operating an electronic device according to various embodiments.

1 is a block diagram of an electronic device 101 within a network environment 100, according to various embodiments. Referring to FIG. 1 , in a network environment 100, an electronic device 101 communicates with an electronic device 102 through a first network 198 (eg, a short-range wireless communication network) or through a second network 199. It is possible to communicate with the electronic device 104 or the server 108 through (eg, a long-distance wireless communication network). According to one embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 . According to an embodiment, the electronic device 101 includes a processor 120, a memory 130, an input module 150, an audio output module 155, a display module 160, an audio module 170, a sensor module ( 176), interface 177, connection terminal 178, haptic module 179, camera module 180, power management module 188, battery 189, communication module 190, subscriber identification module 196 , or the antenna module 197 may be included. In some embodiments, in the electronic device 101, at least one of these components (eg, the connection terminal 178) may be omitted or one or more other components may be added. In some embodiments, some of these components (eg, sensor module 176, camera module 180, or antenna module 197) are integrated into a single component (eg, display module 160). It can be.

The processor 120, for example, executes software (eg, the program 140) to cause at least one other component (eg, hardware or software component) of the electronic device 101 connected to the processor 120. It can control and perform various data processing or calculations. According to one embodiment, as at least part of data processing or operation, the processor 120 transfers instructions or data received from other components (e.g., sensor module 176 or communication module 190) to volatile memory 132. , processing commands or data stored in the volatile memory 132 , and storing resultant data in the non-volatile memory 134 . According to one embodiment, the processor 120 may include a main processor 121 (eg, a central processing unit or an application processor) or a secondary processor 123 (eg, a graphic processing unit, a neural network processing unit ( NPU: neural processing unit (NPU), image signal processor, sensor hub processor, or communication processor). For example, when the electronic device 101 includes the main processor 121 and the auxiliary processor 123, the auxiliary processor 123 may use less power than the main processor 121 or be set to be specialized for a designated function. can The secondary processor 123 may be implemented separately from or as part of the main processor 121 .

The secondary processor 123 may, for example, take the place of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or the main processor 121 is active (eg, running an application). ) state, together with the main processor 121, at least one of the components of the electronic device 101 (eg, the display module 160, the sensor module 176, or the communication module 190) It is possible to control at least some of the related functions or states. According to one embodiment, the auxiliary processor 123 (eg, image signal processor or communication processor) may be implemented as part of other functionally related components (eg, camera module 180 or communication module 190). there is. According to an embodiment, the auxiliary processor 123 (eg, a neural network processing device) may include a hardware structure specialized for processing an artificial intelligence model. AI models can be created through machine learning. Such learning may be performed, for example, in the electronic device 101 itself where artificial intelligence is performed, or may be performed through a separate server (eg, the server 108). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning or reinforcement learning, but in the above example Not limited. The artificial intelligence model may include a plurality of artificial neural network layers. Artificial neural networks include deep neural networks (DNNs), convolutional neural networks (CNNs), recurrent neural networks (RNNs), restricted boltzmann machines (RBMs), deep belief networks (DBNs), bidirectional recurrent deep neural networks (BRDNNs), It may be one of deep Q-networks or a combination of two or more of the foregoing, but is not limited to the foregoing examples. The artificial intelligence model may include, in addition or alternatively, software structures in addition to hardware structures.

The memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 176) of the electronic device 101 . The data may include, for example, input data or output data for software (eg, program 140) and commands related thereto. The memory 130 may include volatile memory 132 or non-volatile memory 134 .

The program 140 may be stored as software in the memory 130 and may include, for example, an operating system 142 , middleware 144 , or an application 146 .

The input module 150 may receive a command or data to be used by a component (eg, the processor 120) of the electronic device 101 from the outside of the electronic device 101 (eg, a user). The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (eg, a button), or a digital pen (eg, a stylus pen).

The sound output module 155 may output sound signals to the outside of the electronic device 101 . The sound output module 155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as multimedia playback or recording playback. A receiver may be used to receive an incoming call. According to one embodiment, the receiver may be implemented separately from the speaker or as part of it.

The display module 160 may visually provide information to the outside of the electronic device 101 (eg, a user). The display module 160 may include, for example, a display, a hologram device, or a projector and a control circuit for controlling the device. According to one embodiment, the display module 160 may include a touch sensor set to detect a touch or a pressure sensor set to measure the intensity of force generated by the touch.

The audio module 170 may convert sound into an electrical signal or vice versa. According to one embodiment, the audio module 170 acquires sound through the input module 150, the sound output module 155, or an external electronic device connected directly or wirelessly to the electronic device 101 (eg: Sound may be output through the electronic device 102 (eg, a speaker or a headphone).

The sensor module 176 detects an operating state (eg, power or temperature) of the electronic device 101 or an external environmental state (eg, a user state), and generates an electrical signal or data value corresponding to the detected state. can do. According to one embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a bio sensor, It may include a temperature sensor, humidity sensor, or light sensor.

The interface 177 may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device 101 to an external electronic device (eg, the electronic device 102). According to one embodiment, the interface 177 may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

The connection terminal 178 may include a connector through which the electronic device 101 may be physically connected to an external electronic device (eg, the electronic device 102). According to one embodiment, the connection terminal 178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (eg, a headphone connector).

The haptic module 179 may convert electrical signals into mechanical stimuli (eg, vibration or motion) or electrical stimuli that a user may perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and moving images. According to one embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

The power management module 188 may manage power supplied to the electronic device 101 . According to one embodiment, the power management module 188 may be implemented as at least part of a power management integrated circuit (PMIC), for example.

The battery 189 may supply power to at least one component of the electronic device 101 . According to one embodiment, the battery 189 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell.

The communication module 190 is a direct (eg, wired) communication channel or a wireless communication channel between the electronic device 101 and an external electronic device (eg, the electronic device 102, the electronic device 104, or the server 108). Establishment and communication through the established communication channel may be supported. The communication module 190 may include one or more communication processors that operate independently of the processor 120 (eg, an application processor) and support direct (eg, wired) communication or wireless communication. According to one embodiment, the communication module 190 is a wireless communication module 192 (eg, a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module 194 (eg, : a local area network (LAN) communication module or a power line communication module). Among these communication modules, a corresponding communication module is a first network 198 (eg, a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network 199 (eg, legacy It may communicate with the external electronic device 104 through a cellular network, a 5G network, a next-generation communication network, the Internet, or a telecommunications network such as a computer network (eg, a LAN or a WAN). These various types of communication modules may be integrated as one component (eg, a single chip) or implemented as a plurality of separate components (eg, multiple chips). The wireless communication module 192 uses subscriber information (eg, International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module 196 within a communication network such as the first network 198 or the second network 199. The electronic device 101 may be identified or authenticated.

The wireless communication module 192 may support a 5G network after a 4G network and a next-generation communication technology, for example, NR access technology (new radio access technology). NR access technologies include high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and access of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low latency (URLLC)). -latency communications)) can be supported. The wireless communication module 192 may support a high frequency band (eg, mmWave band) to achieve a high data rate, for example. The wireless communication module 192 uses various technologies for securing performance in a high frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), and full-dimensional multiplexing. Technologies such as input/output (FD-MIMO: full dimensional MIMO), array antenna, analog beam-forming, or large scale antenna may be supported. The wireless communication module 192 may support various requirements defined for the electronic device 101, an external electronic device (eg, the electronic device 104), or a network system (eg, the second network 199). According to one embodiment, the wireless communication module 192 is a peak data rate for eMBB realization (eg, 20 Gbps or more), a loss coverage for mMTC realization (eg, 164 dB or less), or a U-plane latency for URLLC realization (eg, Example: downlink (DL) and uplink (UL) each of 0.5 ms or less, or round trip 1 ms or less) may be supported.

The antenna module 197 may transmit or receive signals or power to the outside (eg, an external electronic device). According to one embodiment, the antenna module 197 may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (eg, PCB). According to one embodiment, the antenna module 197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is selected from the plurality of antennas by the communication module 190, for example. can be chosen A signal or power may be transmitted or received between the communication module 190 and an external electronic device through the selected at least one antenna. According to some embodiments, other components (eg, a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module 197 in addition to the radiator.

According to various embodiments, the antenna module 197 may form a mmWave antenna module. According to one embodiment, the mmWave antenna module includes a printed circuit board, an RFIC disposed on or adjacent to a first surface (eg, a lower surface) of the printed circuit board and capable of supporting a designated high frequency band (eg, mmWave band); and a plurality of antennas (eg, array antennas) disposed on or adjacent to a second surface (eg, a top surface or a side surface) of the printed circuit board and capable of transmitting or receiving signals of the designated high frequency band. can do.

At least some of the components are connected to each other through a communication method between peripheral devices (eg, a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and signal ( e.g. commands or data) can be exchanged with each other.

According to an embodiment, commands or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 . Each of the external electronic devices 102 or 104 may be the same as or different from the electronic device 101 . According to an embodiment, all or part of operations executed in the electronic device 101 may be executed in one or more external electronic devices among the external electronic devices 102 , 104 , or 108 . For example, when the electronic device 101 needs to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device 101 instead of executing the function or service by itself. Alternatively or additionally, one or more external electronic devices may be requested to perform the function or at least part of the service. One or more external electronic devices receiving the request may execute at least a part of the requested function or service or an additional function or service related to the request, and deliver the execution result to the electronic device 101 . The electronic device 101 may provide the result as at least part of a response to the request as it is or additionally processed. To this end, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device 101 may provide an ultra-low latency service using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device 104 may include an internet of things (IoT) device. Server 108 may be an intelligent server using machine learning and/or neural networks. According to one embodiment, the external electronic device 104 or server 108 may be included in the second network 199 . The electronic device 101 may be applied to intelligent services (eg, smart home, smart city, smart car, or health care) based on 5G communication technology and IoT-related technology.

2A is a block diagram 200 of an electronic device 101 for supporting legacy network communication and 5G network communication, according to various embodiments. Referring to FIG. 2A, the electronic device 101 includes a first communication processor 212, a second communication processor 214, a first radio frequency integrated circuit (RFIC) 222, a second RFIC 224, and a third RFIC 226, fourth RFIC 228, first radio frequency front end (RFFE) 232, second RFFE 234, first antenna module 242, second antenna module 244, third An antenna module 246 and antennas 248 may be included. The electronic device 101 may further include a processor 120 and a memory 130 . The second network 199 may include a first cellular network 292 and a second cellular network 294 . According to another embodiment, the electronic device 101 may further include at least one of the components illustrated in FIG. 1 , and the second network 199 may further include at least one other network. According to one embodiment, a first communication processor 212, a second communication processor 214, a first RFIC 222, a second RFIC 224, a fourth RFIC 228, a first RFFE 232, and the second RFFE 234 may form at least a portion of the wireless communication module 192 . According to another embodiment, the fourth RFIC 228 may be omitted or included as part of the third RFIC 226 .

The first communication processor 212 may establish a communication channel of a band to be used for wireless communication with the first cellular network 292 and support legacy network communication through the established communication channel. According to various embodiments, the first cellular network may be a legacy network including a second generation (2G), 3G, 4G, or long term evolution (LTE) network. The second communication processor 214 establishes a communication channel corresponding to a designated band (eg, about 6 GHz to about 60 GHz) among bands to be used for wireless communication with the second cellular network 294, and establishes a 5G network through the established communication channel. communication can be supported. According to various embodiments, the second cellular network 294 may be a 5G network defined by 3GPP. Additionally, according to one embodiment, the first communication processor 212 or the second communication processor 214 corresponds to another designated band (eg, about 6 GHz or less) among bands to be used for wireless communication with the second cellular network 294. It is possible to support establishment of a communication channel to be established, and 5G network communication through the established communication channel.

The first communication processor 212 may transmit and receive data with the second communication processor 214 . For example, data classified as being transmitted through the second cellular network 294 may be changed to be transmitted through the first cellular network 292 . In this case, the first communication processor 212 may receive transmission data from the second communication processor 214 . For example, the first communication processor 212 may transmit and receive data through the second communication processor 214 and the inter-processor interface 213 . The processor-to-processor interface 213 may be implemented as, for example, a universal asynchronous receiver/transmitter (UART) (eg, HS-high speed-UART (HS-UART) or a peripheral component interconnect bus express (PCIe) interface), but the type Alternatively, the first communication processor 212 and the second communication processor 214 may exchange control information and packet data information using, for example, a shared memory. The communication processor 212 may transmit and receive various types of information such as sensing information, information on output strength, and resource block (RB) allocation information with the second communication processor 214 .

Depending on the implementation, the first communications processor 212 may not be directly coupled to the second communications processor 214 . In this case, the first communication processor 212 may transmit and receive data through the second communication processor 214 and the processor 120 (eg, an application processor). For example, the first communication processor 212 and the second communication processor 214 may transmit and receive data with the processor 120 (eg, application processor) through an HS-UART interface or a PCIe interface, but the interface There are no restrictions on types. Alternatively, the first communication processor 212 and the second communication processor 214 may exchange control information and packet data information using a shared memory with the processor 120 (eg, an application processor). .

According to one embodiment, the first communication processor 212 and the second communication processor 214 may be implemented on a single chip or in a single package. According to various embodiments, the first communication processor 212 or the second communication processor 214 may be formed in a single chip or single package with the processor 120, coprocessor 123, or communication module 190. there is. For example, as shown in FIG. 2B , the unified communications processor 260 may support functions for communication with both the first cellular network 292 and the second cellular network 294 .

The first RFIC 222, when transmitted, transmits a baseband signal generated by the first communication processor 212 to about 700 MHz to about 700 MHz used in the first cellular network 292 (eg, a legacy network). It can be converted into a radio frequency (RF) signal at 3 GHz. In reception, an RF signal is obtained from a first network 292 (eg, a legacy network) via an antenna (eg, first antenna module 242), and via an RFFE (eg, first RFFE 232). It can be preprocessed. The first RFIC 222 may convert the preprocessed RF signal into a baseband signal to be processed by the first communication processor 212 .

The second RFIC 224 uses the baseband signal generated by the first communication processor 212 or the second communication processor 214 to the second cellular network 294 (eg, a 5G network) during transmission. It can be converted into an RF signal (hereinafter referred to as a 5G Sub6 RF signal) of a Sub6 band (eg, about 6 GHz or less). At reception, a 5G Sub6 RF signal is obtained from a second cellular network 294 (eg, a 5G network) through an antenna (eg, the second antenna module 244), and an RFFE (eg, the second RFFE 234) ) can be pretreated through. The second RFIC 224 may convert the preprocessed 5G Sub6 RF signal into a baseband signal to be processed by a corresponding communication processor among the first communication processor 212 and the second communication processor 214 .

The third RFIC 226 transmits the baseband signal generated by the second communication processor 214 to the 5G Above6 band (eg, about 6 GHz to about 60 GHz) to be used in the second cellular network 294 (eg, a 5G network). It can be converted into an RF signal (hereinafter referred to as 5G Above6 RF signal). Upon reception, the 5G Above6 RF signal may be obtained from the second cellular network 294 (eg, 5G network) via an antenna (eg, antenna 248) and preprocessed via a third RFFE 236. The third RFIC 226 may convert the preprocessed 5G Above6 RF signal into a baseband signal to be processed by the second communication processor 214 . According to one embodiment, the third RFFE 236 may be formed as part of the third RFIC 226 .

The electronic device 101, according to one embodiment, may include a fourth RFIC 228 separately from or at least as part of the third RFIC 226. In this case, the fourth RFIC 228 converts the baseband signal generated by the second communication processor 214 into an RF signal (hereinafter referred to as an IF signal) of an intermediate frequency band (eg, about 9 GHz to about 11 GHz). After conversion, the IF signal may be transmitted to the third RFIC 226. The third RFIC 226 may convert the IF signal into a 5G Above6 RF signal. Upon reception, a 5G Above6 RF signal may be received from a second cellular network 294 (eg, a 5G network) via an antenna (eg, antenna 248) and converted to an IF signal by a third RFIC 226. there is. The fourth RFIC 228 may convert the IF signal into a baseband signal so that the second communication processor 214 can process it.

According to one embodiment, the first RFIC 222 and the second RFIC 224 may be implemented as a single chip or at least part of a single package. According to various embodiments, when the first RFIC 222 and the second RFIC 224 in FIG. 2A or 2B are implemented as a single chip or a single package, they may be implemented as an integrated RFIC. In this case, the integrated RFIC is connected to the first RFFE 232 and the second RFFE 234 to convert the baseband signal into a signal of a band supported by the first RFFE 232 and/or the second RFFE 234, , The converted signal may be transmitted to one of the first RFFE 232 and the second RFFE 234. According to one embodiment, the first RFFE 232 and the second RFFE 234 may be implemented as a single chip or at least part of a single package. According to one embodiment, at least one antenna module of the first antenna module 242 or the second antenna module 244 may be omitted or combined with another antenna module to process RF signals of a plurality of corresponding bands.

According to one embodiment, third RFIC 226 and antenna 248 may be disposed on the same substrate to form third antenna module 246 . For example, the wireless communication module 192 or processor 120 may be disposed on a first substrate (eg, main PCB). In this case, the third RFIC 226 is provided on a part (eg, lower surface) of the second substrate (eg, sub PCB) separate from the first substrate, and the antenna 248 is placed on another part (eg, upper surface). is disposed, the third antenna module 246 may be formed. By arranging the third RFIC 226 and the antenna 248 on the same substrate, it is possible to reduce the length of the transmission line therebetween. This, for example, can reduce loss (eg, attenuation) of a signal of a high frequency band (eg, about 6 GHz to about 60 GHz) used in 5G network communication by a transmission line. As a result, the electronic device 101 can improve the quality or speed of communication with the second network 294 (eg, 5G network).

According to an example, antenna 248 may be formed as an antenna array comprising a plurality of antenna elements that may be used for beamforming. In this case, the third RFIC 226 may include, for example, a plurality of phase shifters 238 corresponding to a plurality of antenna elements as part of the third RFFE 236 . During transmission, each of the plurality of phase shifters 238 may convert the phase of a 5G Above6 RF signal to be transmitted to the outside of the electronic device 101 (eg, a base station of a 5G network) through a corresponding antenna element. . Upon reception, each of the plurality of phase shifters 238 may convert the phase of the 5G Above6 RF signal received from the outside through the corresponding antenna element into the same or substantially the same phase. This enables transmission or reception through beamforming between the electronic device 101 and the outside.

The second cellular network 294 (eg, 5G network) may be operated independently (eg, Stand-Alone (SA)) or connected to the first cellular network 292 (eg, a legacy network) ( Example: Non-Stand Alone (NSA)). For example, a 5G network may include only an access network (eg, a 5G radio access network (RAN) or a next generation RAN (NG RAN)) and no core network (eg, a next generation core (NGC)). In this case, after accessing the access network of the 5G network, the electronic device 101 may access an external network (eg, the Internet) under the control of a core network (eg, evolved packed core (EPC)) of the legacy network. Protocol information for communication with the legacy network (eg LTE protocol information) or protocol information for communication with the 5G network (eg New Radio (NR) protocol information) is stored in the memory 230, and other parts (eg processor 120 , the first communications processor 212 , or the second communications processor 214 .

3A and 3B are diagrams for explaining an electronic device state and state transition according to various embodiments.

According to various embodiments, electronic device 101 (eg, processor 120 of FIG. 1 , first communication processor 212 of FIG. 2A , second communication processor 214 of FIG. 2A , or FIG. 2B ) At least one of the unified communication processors 260) may start an operation from the reference point of 301 and proceed to the reference point of ① when a new PLMN is selected. In operation 303, the electronic device 101 may confirm that there is cell information stored for the PLMN. In this case, the electronic device 101 may perform stored information cell selection in operation 305 . For example, the electronic device 101 may perform a cell search based on stored carrier frequency and/or cell parameter information. Alternatively, as in operation 307, there may be no cell information stored for the PLMN in the electronic device 101. In this case, the electronic device 101 may perform initial cell selection in operation 309 . For example, the electronic device 101 may perform a search for all RF channels of RAT bands according to the capability of the electronic device 101 to find an appropriate cell. Meanwhile, as in operation 311, it may be determined that no suitable cell is found in the search based on the stored cell information. In this case, the electronic device 101 may perform initial cell selection in operation 309 .

According to various embodiments, the electronic device 101 may determine that no suitable cell is found even according to the initial cell selection in operation 313 . Accordingly, the electronic device 101 may enter an any cell selection state as in operation 315 . In operation 317, if a suitable cell is found according to the search for initial cell selection, the electronic device 101 may normally camp on a suitable cell in operation 319. Alternatively, if a suitable cell is found according to the stored cell selection search in operation 321 , the electronic device 101 may normally camp on an appropriate cell in operation 319 .

According to various embodiments, after normally camping on an appropriate cell, the electronic device 101 may leave an idle mode or an inactive mode in operation 323 . Accordingly, the electronic device 101 may enter a connected mode in operation 325 . After entering the connected mode, the electronic device 101 may return to idle mode or inactive mode in operation 327 . In operation 329, the electronic device 101 may perform cell selection when leaving connected mode based on leaving the connected mode. When the electronic device 101 cannot find an appropriate cell as a result of searching for cell selection (operation 331), the electronic device 101 may perform cell selection based on the stored information as in operation 305. Meanwhile, if an appropriate cell is found in operation 333 according to the search result in operation 329, the electronic device 101 may normally camp on the appropriate cell.

According to various embodiments, after normally camping on an appropriate cell, the electronic device 101 may check a trigger of a cell reselection condition in operation 335 . If the trigger is confirmed, the electronic device 101 may perform a cell reselection evaluation process in operation 339 . If an appropriate cell is found as in operation 337 according to the cell reselection evaluation procedure, the electronic device 101 may normally camp on the appropriate cell. If an appropriate cell is not found as in operation 341 according to the cell reselection evaluation procedure, the electronic device 101 may enter an any cell selection state. Alternatively, after normally camping on an appropriate cell, if the NAS layer notifies that registration with the selected PLMN has failed (operation 343), the electronic device 101 may enter an any cell selection state. there is. In this case, when the cause of rejection is #12, #14, #15, or #25 of 3GPP TS 23.122 and/or 3GPP TS 24.301, operation 343 may not be applied.

According to various embodiments, the electronic device 101 may enter an arbitrary cell selection state when the USIM is not connected to the slot or the profile in the eSIM is deactivated (or does not exist) as in operation 345. can If it is connected to a slot of the USIM in a certain cell selection state or a profile in the eSIM is activated (Operation 347), the electronic device 11 may proceed to the reference point of ①.

According to various embodiments, the electronic device 101 may perform cell search without considering the PLMN in an arbitrary cell selection state. If an acceptable cell is found according to the cell search result (operation 349), the electronic device 101 may camp on an arbitrary cell, for example, the found acceptable cell, in operation 351. An acceptable cell may refer to a cell that can camp on to obtain limited services (eg, emergency call and reception of danger messages (eg, ETWS notification and/or CMAS notification)). According to various embodiments, when the electronic device 101 finds an appropriate cell according to a cell search result not considering the PLMN in an arbitrary cell selection state (operation 350), the electronic device 101 proceeds to the reference point ②. Thus, as in operation 319, it is possible to camp on an appropriate cell.

According to various embodiments, if an appropriate cell is found while camping on a cell (operation 353), the electronic device 101 proceeds to the reference point ② and camps on an appropriate cell as in operation 319. there is. While camping on a certain cell, the electronic device 101 may check a trigger of a cell reselection condition in operation 355 . If the trigger is confirmed, the electronic device 101 may perform a cell reselection evaluation process in operation 359 . If an acceptable cell is found as in operation 357 according to the cell reselection evaluation procedure, the electronic device 101 may camp on an appropriate acceptable cell. If an acceptable cell is not found as in operation 361 according to the cell reselection evaluation procedure, the electronic device 101 may enter an any cell selection state.

According to various embodiments, after camping on a cell, the electronic device 101 may leave an idle mode in operation 363 . Accordingly, in operation 365, the electronic device 101 may enter a connected mode (Emergency Calls only) for the purpose of making an emergency call. After entering the connected mode, the electronic device 101 may return to idle mode in operation 367 . In operation 369, the electronic device 101 may perform cell selection when leaving connected mode based on leaving the connected mode. When the electronic device 101 cannot find an acceptable cell as a result of searching for cell selection (operation 371), the electronic device 101 may enter an arbitrary cell selection state as in operation 315. Meanwhile, if an acceptable cell is found in operation 373 according to the search result of operation 369, the electronic device 101 may camp on the acceptable cell.

As described above, the condition for the electronic device 101 to enter the arbitrary cell selection state in operation 315 is that an appropriate cell is not found according to the initial search for cell selection as in operation 313 and, as in operation 341, Likewise, when an appropriate cell is not found according to the cell reselection evaluation procedure, when registration failure with the PLMN is notified as in operation 343, when the USIM is not connected as in operation 345, or when a profile activated in the eSIM is not found. If there is none, an acceptable cell is not found according to the cell reselection evaluation procedure as in operation 361, or an appropriate cell is not found according to the search for cell selection based on leaving the connected mode as in operation 371 may be at least one of

According to various embodiments, the electronic device 101 may proceed with a cell reselection evaluation procedure in operation 339 or 359 to determine whether to reselect a cell for at least one target cell.

4 is a flowchart illustrating an operating method of an electronic device according to various embodiments. Referring to FIG. 4 , according to various embodiments, an electronic device 101 (eg, the processor 120 of FIG. 1 , the first communication processor 212 of FIG. 2A , and the second communication processor 214 of FIG. 2A ) ), or at least one of the unified communication processor 260 of FIG. 2B ), in operation 402, performs cell search to camp on a cell. For example, the electronic device may perform a camp-on operation of operation 319 or operation 351 disclosed in 3GPP TS 36.304 or 3GPP TS 38.304 described in FIG. 3A or 3B.

According to various embodiments, the electronic device 101 may detect a cell reselection trigger in operation 404 . For example, the cell reselection trigger may be triggered periodically according to a set period or may be triggered when a specified condition is satisfied. The cell reselection trigger may include a trigger of operation 335 or operation 355 disclosed in 3GPP TS 36.304 or 3GPP TS 38.304 described in FIG. 3A or 3B.

According to various embodiments, based on detecting the cell reselection trigger, the electronic device 101 may check the cell reselection priority of the serving cell and the cell reselection priority of the target cell in operation 406 . According to various embodiments, the reselection priority of the serving cell and the cell reselection priority of the target cell are a system information block (SIB) transmitted from a base station of a communication network, a radio resource control (RRC) release message It can be confirmed through at least one of (RRC release message) and dedicated message. For example, as shown in Table 1 below, the electronic device 101 may check cell reselection priorities from information included in SIB 2 transmitted from the base station.

SIB2 ::= SEQUENCE {
cellReselectionInfoCommon SEQUENCE {
nrofSS-BlocksToAverage INTEGER (2..maxNrofSS-BlocksToAverage)
absThreshSS-BlocksConsolidation ThresholdNR
rangeToBestCell RangeToBestCell
q-Hyst ENUMERATED {
dB0, dB1, dB2, dB3, dB4, dB5, dB6, dB8, dB10,
dB12, dB14, dB16, dB18, dB20, dB22, dB24},
speedStateReselectionPars SEQUENCE {
mobilityStateParameters MobilityStateParameters,
q-HystSF SEQUENCE {
sf-Medium ENUMERATED {dB-6, dB-4, dB-2, dB0
sf-High ENUMERATED {dB-6, dB-4, dB-2, dB0}
}
},
cellReselectionServingFreqInfo SEQUENCE {
s-NonIntraSearchP ReselectionThreshold
s-NonIntraSearchQ ReselectionThresholdQ
threshServingLowP ReselectionThreshold,
threshServingLowQ ReselectionThresholdQ
cellReselectionPriority CellReselectionPriority,
cellReselectionSubPriority CellReselectionSubPriority
},

Referring to <Table 1>, the electronic device 101 can check cell reselection priority through 'cellReselectionPriority' included in SIB 2 transmitted from the base station.

For example, as shown in Table 2 below, the electronic device 101 may check cell reselection priorities from information included in the following RRC release message transmitted from the base station.

RRCRelease ::= SEQUENCE {
rrc-TransactionIdentifier RRC-TransactionIdentifier,
criticalExtensions CHOICE {
rrcRelease RRCRelease-IEs;
criticalExtensionsFuture SEQUENCE {}
}
}
RRCRelease-IEs ::= SEQUENCE {
redirectedCarrierInfo RedirectedCarrierInfo
cellReselectionPriorities CellReselectionPriorities
suspendConfig SuspendConfig
deprioritisationReq SEQUENCE {
deprioritisationType ENUMERATED {frequency, nr},
deprioritisationTimer ENUMERATED {min5, min10, min15, min30}
} lateNonCriticalExtension OCTET STRING
nonCriticalExtension RRCRelease-v1540-IEs
}

CellReselectionPriorities ::= SEQUENCE {

freqPriorityListEUTRA FreqPriorityListEUTRA
freqPriorityListNR FreqPriorityListNR
t320 ENUMERATED {min5, min10, min20, min30, min60, min120, min180, spare1} OPTIONAL,
}

FreqPriorityListEUTRA ::= SEQUENCE (SIZE (1..maxFreq)) OF FreqPriorityEUTRA

FreqPriorityListNR ::= SEQUENCE (SIZE (1..maxFreq)) OF FreqPriorityNR

FreqPriorityEUTRA ::= SEQUENCE {
carrierFreq ARFCN-ValueEUTRA;
cellReselectionPriority CellReselectionPriority,
cellReselectionSubPriority CellReselectionSubPriority
}

FreqPriorityNR ::= SEQUENCE {
carrierFreq ARFCN-ValueNR,
cellReselectionPriority CellReselectionPriority,
cellReselectionSubPriority CellReselectionSubPriority
}

Referring to <Table 2>, the electronic device 101 can check the cell reselection priority through 'cellReselectionPriority' included in the RRC release message transmitted from the base station. According to various embodiments, as illustrated in Table 2 above, when 'deprioritisationReq' is included in the RRC release message, the electronic device 101 may set the cell reselection priority of the corresponding frequency to the lowest priority. there is. For example, the electronic device 101 may set the corresponding frequency to be the lowest priority by setting the cell reselection priority to '-1'. Table 3 below shows an example of an RRC release message.

rrcConnectionRelease
.....

Item 0
FreqPriorityEUTRA
carrierFreq: 275
cellReselectionPriority: 1

Item 1
FreqPriorityEUTRA
carrierFreq: 1355
cellReselectionPriority: 7

Item 2
FreqPriorityEUTRA
carrierFreq: 2500
cellReselectionPriority: 2

Item 3
FreqPriorityEUTRA
carrierFreq: 2850
cellReselectionPriority: 6

Item 4
FreqPriorityEUTRA
carrierFreq: 3200
cellReselectionPriority: 5

t320: min10(1)

According to various embodiments, when the electronic device 101 receives the cell reselection priority through a dedicated message, the electronic device 101 may ignore the priority confirmed through SIB 2 of <Table 1>. When cell reselection priority is received through the dedicated message, the electronic device 101 enters another RRC state, or a set timer (eg, the optional validity time of dedicated priorities (T320) or the optional validity time of T323 (the optional priorities)). When the validity time of altFreqPriorities) timer expires, the cell reselection priority identified through the dedicated message may be deleted.

According to various embodiments, the electronic device 101, corresponding to cell reselection trigger detection, determines the inter-frequency or inter-RAT frequency of a target cell having a higher priority than the priority of the current serving cell. It is possible to determine whether or not to reselect a cell by performing measurement on Corresponding to the detection of the cell reselection trigger, the electronic device 101 sets conditions specified for target cells having a priority equal to or lower than the priority of the current serving cell (eg, 'Srxlev >SnonIntraSearchP' and 'Squal >SnonIntraSearchQ') If not satisfied, measurement may be performed on an inter-frequency or inter-RAT frequency. According to various embodiments, the electronic device 101 corresponds to cell reselection trigger detection, when the priority of the current serving cell and the priority of the target cell are the same, the method illustrated in 3GPP TS 36.304 or 3GPP TS 38.304 ( For example, whether to reselect a cell may be determined according to a method for comparing cell-ranking conditions).

According to various embodiments, in operation 408, the electronic device 101 compares the cell reselection priority of the serving cell with the cell reselection priority of the target cell, so that the cell reselection priority of the serving cell is the cell of the target cell. You can check if it is greater than the reselection priority.

According to various embodiments, when it is determined that the cell reselection priority of the serving cell is greater than the cell reselection priority of the target cell as a result of the comparison (operation 408-Yes), the electronic device 101 sets in operation 412 Based on the first condition, it may be determined whether the cell reselection condition is satisfied. For example, the first condition may include a condition set for cell reselection from a cell having a relatively higher cell reselection priority to a cell with a lower cell reselection priority, and the following <Equation 1 defined in 3GPP TS 36.304 or 3GPP TS 38.304 > or <Equation 2> may be included.

Srxlev in <Equation 1> and Squal in <Equation 2> are values calculated based on the measured received signal strength, and may be referred to as measured values related to the received signal strength. Referring to <Equation 1> and <Equation 2>, when the cell reselection priority of the serving cell is greater than the cell reselection priority of the target cell, a measurement value related to the received signal strength measured in the serving cell. is less than the first threshold (eg, "Thresh _Serving.LowP " or "Thresh _Serving.LowQ ") set for the serving cell and a measurement value related to the received signal strength measured in the target cell is When it is greater than the set third threshold (eg, “Thresh _X.LowP ” or “Thresh _X.LowQ ”), the electronic device 101 transfers a cell from a serving cell with a high priority to a target cell with a low priority. It may be determined that the selection condition (eg, the first condition) is satisfied.

According to various embodiments, in <Equation 1>, Srxlev may be calculated by the following <Equation 3>, and in <Equation 2>, Squal may be calculated by the following <Equation 4>. there is.

A description of each parameter included in <Equation 3> and <Equation 4> is shown in Table 4 below.

Srxlev Cell selection RX level value (dB) Squal Cell selection quality value (dB) Qoffset _temp Offset temporarily applied to a cell as specified in TS(technical specification) 38.331 (dB) Qrxlevmeas Measured cell RX level value (RSRP) Qqualmeas Measured cell quality value (RSRQ) Qrxlevmin Minimum required RX level in the cell (dBm). If the UE supports SUL frequency for this cell, Qrxlevmin is obtained from RxLevMinSUL , if present, in SIB1 , SIB2 and SIB4 , additionally, if QrxlevminoffsetcellSUL is present in SIB3 and SIB4 for the concerned cell, this cell specific offset is added to the corresponding Qrxlevmin to achieve the required minimum RX level in the concerned cell; else Qrxlevmin is obtained from q-RxLevMin in SIB1 SIB1, SIB2 and SIB4 , additionally, if Qrxlevminoffsetcell is present in SIB3 and SIB4 for the concerned cell, this cell specific offset is added to the corresponding Qrxlevmin to achieve the required minimum RX level in the concerned cell. Qqualmin Minimum required quality level in the cell (dB). Additionally, if Qqualminoffsetcell is signaled for the concerned cell, this cell specific offset is added to achieve the required minimum quality level in the concerned cell. Qrxlevminoffset Offset to the signalled Qrxlevmin taken into account in the Srxlev evaluation as a result of a periodic search for a higher priority PLMN while camped normally in a VPLMN 3GPP TS 23.122 Qqualminoffset Offset to the signalled Qqualmin taken into account in the Squal evaluation as a result of a periodic search for a higher priority PLMN while camped normally in a VPLMN 3GPP TS 23.122 Compensation If the UE supports the additionalPmax in the NS-PmaxList, if present, in SIB1, SIB2 and SIB4: max(PEMAX1 -PPowerClass, 0) - (min(PEMAX2, PPowerClass) - min(PEMAX1, PPowerClass)) (dB); else: max(PEMAX1 -PPowerClass, 0) (dB) PEMAX1, PEMAX2 Maximum TX power level of a UE may use when transmitting on the uplink in the cell (dBm) defined as PEMAX in TS 38.101 [15]. PEMAX1 and PEMAX2 are obtained from the p-Max and NS-PmaxList respectively in SIB1 , SIB2 and SIB4 as specified in TS 38.331 PPowerClass Maximum RF output power of the UE (dBm) according to the UE power class as defined in TS 38.101

<Table 4> is based on 3GPP TS 38.304, and in the case of E-UTRA, it can be replaced with the definition of 3GPP TS 36.304, and the cell reselection condition of the electronic device 101 according to various examples is RAT Those skilled in the art will understand that it is not limited according to the type of. For example, each parameter of <Table 4> can be confirmed through a system information block (eg, SIB 1, SIB 2, or SIB 3) transmitted from the base station as shown in <Table 5> below.

SIB3: Cell Reselection Related Information
: cellReselectionPriority
: intraFreqCellReselectionInfo : q-RxLevMin, s-IntraSearch
SIB4: Information on Intra Frequency Cell Reselection
SIB5: Information on Inter Frequency Cell Reselection
SIB6: UTRA Cell Reselection Related Information
SIB7: GERAN Cell Reselection Related Information
SIB8: Information on CDMA2000 Cell Reselection

According to various embodiments, when the cell reselection priority of the serving cell is greater than the cell reselection priority of the target cell, according to <Equation 1> and <Equation 2>, the received signal strength of the serving cell If the measurement value related to is smaller than the first threshold set for the serving cell in the serving cell, and the measurement value related to the received signal strength of the target cell is greater than the third threshold set for the target cell in the serving cell, The electronic device 101 may determine that the first condition is satisfied.

According to various embodiments, as a result of the comparison, if it is determined that the cell reselection priority of the serving cell is lower than the cell reselection priority of the target cell (Operation 408-No), the electronic device 101 sets in operation 410 Based on the second condition, it may be determined whether the cell reselection condition is satisfied. For example, the second condition may include a condition set for cell reselection from a cell having a relatively lower cell reselection priority to a cell having a higher cell reselection priority, and defined in 3GPP TS 36.304 or 3GPP TS 38.304 <Equation 5 > or <Equation 6> may be included.

Srxlev in <Equation 5> and Squal in <Equation 6> are values calculated based on the measured received signal strength as described above, and may be referred to as measured values related to the received signal strength. Referring to <Equation 5> and <Equation 6>, when the cell reselection priority of the serving cell is smaller than the cell reselection priority of the target cell, a measurement value related to the received signal strength measured in the target cell. When is greater than the second threshold (eg, “Thresh _X.HighP ” or “Thresh _X.HighQ ”) set for the serving cell, the electronic device 101 prioritizes the serving cell with the lower priority. It may be determined that a cell reselection condition (eg, second condition) to a high target cell is satisfied.

According to various embodiments, in <Equation 5>, Srxlev may be calculated by <Equation 3> described above, and in <Equation 6>, Squal may be calculated by <Equation 4> described above. It can be.

According to various embodiments, as a result of checking whether the cell reselection condition is satisfied in operation 410 or operation 412, if it is confirmed in operation 414 that the cell reselection condition is satisfied (operation 414-yes), the electronic device 101 ) may perform a cell reselection procedure to a corresponding target cell in operation 418. As a result of checking whether the cell reselection conditions are satisfied in operation 410 or operation 412, if it is confirmed in operation 414 that the cell reselection conditions are not satisfied (operation 414 - No), the electronic device 101 returns in operation 416. The current serving cell may be maintained.

5 is a diagram for explaining a cell reselection method of an electronic device according to various embodiments. Referring to FIG. 5 , cell reselection between cells having different cell reselection priorities may be performed by the method of FIG. 4 described above.

According to various embodiments, the cell reselection priority of cell A 510 may be set to 7, and the cell reselection priority of cell B 520 may be set to 2. As described above, the cell reselection priority is a system information block (e.g., SIB 1, SIB 2, SIB 3), RRC release message (or RRC connection release message), E or dedicated message (dedicated message). message) may be transmitted from the base station.

According to various embodiments, a first threshold (eg, "Thresh Serving. LowP ") among parameters related to cell reselection set for cell A 510 may be set to 32dB, and a third threshold (eg, "Thresh _{Serving. LowP} "). "Thresh _{X. LowP} ") can be set to 8dB. Among the parameters set in the cell B 520, the second threshold (eg, “Thresh _X.HighP ”) may be set to 24 dB.

According to various embodiments, when the electronic device 101 camps on cell A 510, cell A 510 may become a serving cell. The electronic device 101 may detect a cell reselection trigger in the idle mode. Corresponding to the detection of the cell reselection trigger, it may be determined whether cell B 520, which is an adjacent target cell, satisfies the cell reselection condition. For example, as described above in the description of FIG. 4, since the cell reselection priority of cell A 510, which is the serving cell, is higher than that of cell B 520, which is the target cell, the above-described <Equation 1> Alternatively, it can be checked whether the cell reselection condition is satisfied by <Equation 2>.

According to various embodiments, a measurement value (eg, Srxlev (serving cell)) related to the received signal strength measured by the electronic device 101 for cell A 510, which is the serving cell, is obtained by Equation 3 above. can be calculated For example, assuming that Q _rxlevmeas is measured as -104.05dBm, Q _rxlevmin is set as -132.00dBm, and Q _{rxlevminoffset,} P _compensation , and Qoffset _temp are all set to 0, Srxlev is It can be calculated as 27.95dB. A measurement value (for example, Srxlev (target cell)) related to the received signal strength measured by the electronic device 101 for cell B 520, which is the target cell, can be similarly calculated by the above-described Equation 3. For example, assuming that Q _rxlevmeas is measured as -101.97dBm, Q _rxlevmin is set to -128.00dBm, and Q _{rxlevminoffset,} P _compensation , and Qoffset _temp are all set to 0, Srxlev is It can be calculated as 26.03dB.

According to various embodiments, since the cell reselection priority of cell A 510, which is the serving cell, is higher than that of cell B 520, which is the target cell, according to the first condition of Equation 1, Accordingly, 27.95 dB, which is a measurement value (eg, Srxlev (serving cell)) related to the received signal strength measured by the electronic device 101 for cell A 510, which is the serving cell, is the first threshold value (eg, "Thresh _{Serving. LowP} "), which is less than 32dB. In addition, the third threshold is 26.03 dB, which is a measurement value (eg, Srxlev (target cell)) related to the received signal strength measured by the electronic device 101 for cell B 520, which is the target cell, according to the first condition. (Example: "Thresh _{X. LowP} "). According to various embodiments, the electronic device 101 sets the first condition for cell reselection from cell A 510 having a higher cell reselection priority to cell B 520 having a lower cell reselection priority. As it is confirmed to be satisfied, cell reselection may be performed as the cell B 520, which is the target cell. As Cell B 520 is reselected, the electronic device 101 can camp on Cell B 520 .

According to various embodiments, as the electronic device 101 reselects a cell from cell A 510 to cell B 520, the cell B 520 may become a serving cell. As the cell B 520 becomes a serving cell, the cell A 510 may become a target cell. The electronic device 101 may detect a cell reselection trigger in the idle mode. Corresponding to the detection of the cell reselection trigger, it may be determined whether cell A 510, which is an adjacent target cell, satisfies the cell reselection condition. For example, as described above in the description of FIG. 4, since the cell reselection priority of cell B 520, which is the serving cell, is lower than that of cell A 510, which is the target cell, the above-described <Equation 1> Alternatively, it can be checked whether the cell reselection condition is satisfied by <Equation 2>.

According to various embodiments, a measurement value (eg, Srxlev (target cell)) related to the received signal strength measured by the electronic device 101 for cell A 510, which is the target cell, is obtained by Equation 3 above. can be calculated For example, assuming that Q _rxlevmeas is measured as -103.76dBm, Q _rxlevmin is set to -128.00dBm, and Q _{rxlevminoffset,} P _compensation , and Qoffset _temp are all set to 0, Srxlev is It can be calculated as 24.24dB.

According to various embodiments, since the cell reselection priority of cell B 520, which is the serving cell, is lower than the cell reselection priority of cell A 510, which is the target cell, the second condition of Equation 5 Accordingly, 24.24 dB, which is a measurement value (eg, Srxlev (target cell)) related to the received signal strength measured by the electronic device 101 for cell A 510, which is the target cell, is the second threshold value (eg, "Thresh _{X. HighP} "), which is greater than 24B. According to various embodiments, the electronic device 101 sets the second condition for cell reselection from cell B 520 having a low cell reselection priority to cell A 510 having a high cell reselection priority. As it is confirmed to be satisfied, cell reselection may be performed as the cell A 510, which is the target cell. As cell A 510 is reselected, the electronic device 101 can camp on cell A 510 . After camping on the cell A 510, the electronic device 101 may reselect the cell B 520 again as the first condition is satisfied for the target cell, the cell B 520, as described above.

6 is a diagram for checking whether an electronic device satisfies a cell reselection condition according to various embodiments. Referring to FIG. 6 , as illustrated in the description of FIG. 5 , after camping on cell A 510, the electronic device 101 performs cell reselection from cell A 510 to cell B 520. When the first condition is satisfied, cell B 520 may be reselected. After camping on cell B 520, the electronic device 101 reselects cell A 510 as the second condition for cell reselection from cell B 520 to cell A 510 is satisfied. You can choose.

According to various embodiments, as described above, the first threshold value and the second threshold value set to determine whether the first condition and the second condition are satisfied are assigned to cell A 510 having a relatively higher priority. It can be used to compare with a measured value (eg, Srxlev) related to the received signal strength measured by the electronic device 101 for the first time. As the first threshold value set in the cell A 510 and the second threshold value set in the cell B 520 are set differently, the cell reselection condition for making the cell B 520 a target cell is the first. A situation in which the two conditions and the cell reselection condition of using the cell A 510 as the target cell are simultaneously satisfied may occur. When the first condition and the second condition are simultaneously satisfied, a ping-pong phenomenon in which cell reselection is continuously repeated may occur. For example, a measurement value (eg Srxlev) (eg 27.95 dB) related to the received signal strength measured in cell A 510 having a relatively high priority is smaller than the first threshold value (eg 32 dB), and the th If it is greater than 2 thresholds (eg, 24 dB), a ping-pong phenomenon in which cell reselection is repeatedly repeated may occur.

In various embodiments to be described later, embodiments for preventing the ping-pong phenomenon will be described.

7 is a flowchart illustrating a method of operating an electronic device according to various embodiments. Referring to FIG. 7 , according to various embodiments, an electronic device 101 (eg, the processor 120 of FIG. 1 , the first communication processor 212 of FIG. 2A , and the second communication processor 214 of FIG. 2A ) ) or at least one of the unified communication processor 260 of FIG. 2B) may perform cell search to camp on a cell. For example, the electronic device may perform a camp-on operation of operation 319 or operation 351 disclosed in 3GPP TS 36.304 or 3GPP TS 38.304 described in FIG. 3A or 3B.

According to various embodiments, the electronic device 101 may detect a cell reselection trigger. For example, the cell reselection trigger may be triggered periodically according to a set period or may be triggered when a specified condition is satisfied. The cell reselection trigger may include a trigger of operation 335 or operation 355 disclosed in 3GPP TS 36.304 or 3GPP TS 38.304 described in FIG. 3A or 3B.

According to various embodiments, in response to detecting the cell reselection trigger, the electronic device 101 may check the cell reselection priority of the serving cell and the cell reselection priority of the target cell in operation 702 . According to various embodiments, the reselection priority of the serving cell and the cell reselection priority of the target cell are, as described above, a system information block (SIB) transmitted from a base station of a communication network, a radio resource (RRC) It can be confirmed through at least one of a control) release message (RRC release message) and a dedicated message (dedicated message).

According to various embodiments, the electronic device 101 may check whether the target cell is the same cell as the previous serving cell in operation 704 . For example, as shown in FIG. 5 described above, when cell A 520 is reselected from cell A 510 and then cell A 510 is reselected from cell B 520, cell A 510 is the cell. Corresponding to the detection of the trigger for reselection, the cell B 520 may be identified as the same cell as the previous serving cell. According to various embodiments, whether the target cell is the same as the previous cell may be determined based on a PCID (physical cell ID) value, but is not limited thereto. The electronic device 101 stores at least an identifier (eg, PCID) associated with the cell as information corresponding to the previous serving cell in a memory (eg, the memory 130 of FIG. 1 or the memory in the unified communication processor 260 of FIG. 2B) can be stored in Whenever the serving cell is changed by cell reselection, the electronic device 101 may update and manage information corresponding to the previous serving cell (eg, PCID of the previous serving cell). Hereinafter, in various embodiments described later, information corresponding to the previous serving cell may be managed in the memory of the electronic device 101 and used to compare whether the target cell and the previous serving cell are the same cell.

According to various embodiments, in operation 706, the electronic device 101 sets a first threshold for cell reselection (eg, "Thresh _Serving.LowP ” or “Thresh _Serving.LowQ ”) and a second threshold for cell reselection (eg, “Thresh _X.HighP ” or “Thresh _X.HighQ ”) set in the target cell may be checked. . According to various embodiments, the second threshold may be stored in the memory of the electronic device 101 based on cell reselection from the previous serving cell to the serving cell.

According to various embodiments, in operation 708, the electronic device 101 may determine whether to reselect a cell for a target cell based on a comparison result between the first threshold value and the second threshold value. For example, when the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, the electronic device 101 determines the first threshold value based on a smaller value of the second threshold value. By determining whether condition 1 is satisfied, it is possible to determine whether to reselect a cell for a target cell. When the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, the electronic device 101 determines whether the first condition is satisfied by a relatively smaller value, thereby determining whether the same as the previous serving cell is satisfied. A cell having a relatively higher priority may be continuously maintained without reselecting a cell as the target cell. On the other hand, for example, when the cell reselection priority of the serving cell is lower than the cell reselection priority of the target cell, the electronic device 101 based on a larger value of the first threshold and the second threshold By determining whether the second condition is satisfied, it is possible to determine whether to reselect a cell for the target cell. When the cell reselection priority of the serving cell is lower than the cell reselection priority of the target cell, the electronic device 101 determines whether the second condition is satisfied by a relatively higher value, thereby determining whether the same as the previous serving cell is satisfied. A cell having a relatively lower priority may be continuously maintained without reselecting a cell as the target cell.

8 is a flowchart illustrating a method of operating an electronic device according to various embodiments. Referring to FIG. 8 , according to various embodiments, an electronic device 101 (eg, the processor 120 of FIG. 1 , the first communication processor 212 of FIG. 2A , and the second communication processor 214 of FIG. 2A ) ) or at least one of the unified communication processor 260 of FIG. 2B) may perform cell search to camp on a cell. For example, the electronic device may perform a camp-on operation of operation 319 or operation 351 disclosed in 3GPP TS 36.304 or 3GPP TS 38.304 described in FIG. 3A or 3B.

According to various embodiments, the electronic device 101 may detect a cell reselection trigger. For example, the cell reselection trigger may be triggered periodically according to a set period or may be triggered when a specified condition is satisfied. The cell reselection trigger may include a trigger of operation 335 or operation 355 disclosed in 3GPP TS 36.304 or 3GPP TS 38.304 described in FIG. 3A or 3B.

According to various embodiments, in response to detecting the cell reselection trigger, the electronic device 101 may check the cell reselection priority of the serving cell and the cell reselection priority of the target cell in operation 802 . According to various embodiments, the reselection priority of the serving cell and the cell reselection priority of the target cell are, as described above, a system information block (SIB) transmitted from a base station of a communication network, a radio resource (RRC) It can be confirmed through at least one of a control) release message (RRC release message) and a dedicated message (dedicated message).

According to various embodiments, the electronic device 101 may check whether the target cell is the same cell as the previous serving cell in operation 804 . For example, as shown in FIG. 5 described above, when cell A 520 is reselected from cell A 510 and then cell A 510 is reselected from cell B 520, cell A 510 is the cell. Corresponding to the detection of the trigger for reselection, the cell B 520 may be identified as the same cell as the previous serving cell.

According to various embodiments, in operation 804, if the target cell is determined to be a cell that is not the same as the previous serving cell (operation 804 - No), the electronic device 101 performs a cell reselection set to the serving cell in operation 806. Threshold (eg, a first threshold (eg, “Thresh _Serving.LowP ” or “Thresh _Serving.LowQ ”) or a second threshold (eg, “Thresh _X.HighP ” or “Thresh _X.HighQ ”) ), it is possible to determine whether to reselect a cell based on. For example, if the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, cell reselection may be determined based on the first threshold value and the third threshold value, and cell reselection of the serving cell may be performed. When the priority is lower than the cell reselection priority of the target cell, cell reselection may be determined based on the second threshold.

According to various embodiments, in operation 804, if the target cell is identified as the same cell as the previous serving cell (operation 804-yes), the electronic device 101 sets the cell reselection priority of the serving cell to that of the target cell in operation 808. It can be checked whether it is higher than the cell reselection priority. As a result of checking in operation 808, if the cell reselection priority of the serving cell is lower than the cell reselection priority of the target cell (operation 808-No), the electronic device 101 returns to the cell set to the serving cell in operation 806. Whether to reselect a cell may be determined based on a threshold for reselection. For example, since the cell reselection priority of the serving cell is lower than the cell reselection priority of the target cell, cell reselection may be determined based on the second threshold.

According to various embodiments, as a result of checking in operation 808, if the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell (operation 808-Yes), the electronic device 101 performs the above operation 810. A first threshold for cell reselection set in the serving cell (eg, “Thresh _Serving.LowP ” or “Thresh Serving.LowQ”) and a second threshold for cell reselection set in the target cell (eg, “Thresh Serving.LowP” or “Thresh _Serving.LowQ ”). Thresh _X.HighP " or "Thresh _X.HighQ ") to compare with each other. According to various embodiments, the second threshold may be stored in the memory of the electronic device 101 based on cell reselection from the target cell, which is the previous serving cell, to the serving cell. The second threshold for the previous serving cell stored in the memory may be designated and stored as a specific variable (eg, “PrevReselThresh”). The second threshold for the previous serving cell stored in the memory may be initialized when the power of the electronic device 101 is turned off. The second threshold for the previous serving cell stored in the memory may be updated whenever cell reselection occurs in the electronic device 101 .

According to various embodiments, in operation 812, the electronic device 101 compares the first threshold with the second threshold of the target cell, which is the previous serving cell, and determines which of the first threshold and the second threshold is greater. It is possible to determine whether to reselect a cell for a target cell by determining whether the first condition is satisfied based on the small value. When the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, the electronic device 101 determines whether the first condition is satisfied by a relatively smaller value, thereby determining whether the same as the previous serving cell is satisfied. A cell having a relatively higher priority may be continuously maintained without reselecting a cell as the target cell.

9 is a diagram illustrating an example of determining whether an electronic device satisfies a cell reselection condition according to various embodiments. Referring to FIG. 9, when cell B 520 is reselected from cell B 520 to cell A 510 as described above in FIG. , The second threshold value (eg, 24 dB) of cell B 520, which is the previous serving cell and the target cell, may be compared with the first threshold value (eg, 32 dB) of cell A 510. As a result of the comparison, the electronic device 101 determines that the second threshold value (eg, 24 dB) of cell B 520, which is the previous serving cell and the target cell, is greater than the first threshold value (eg, 32 dB) of cell A 510. Since it is smaller, the second threshold may be used as the first condition for cell reselection for the target cell instead of the first threshold. For example, since the cell reselection priority of cell A 510, which is the serving cell, is higher than that of cell B 520, which is the target cell, the electronic device 101 is the serving cell as described above with reference to FIG. 5. For A 510, 27.94dB, a measurement value related to the received signal strength measured by the electronic device 101 (eg, Srxlev (serving cell)), is converted into a first threshold value (eg, “Thresh _{Serving. LowP} ”) of 32dB. Instead of comparing with , it may be compared with a second threshold (eg, 24 dB) set for cell B 520, which is the same target cell as the previous serving cell. As shown in FIG. 9, as a result of the comparison, a measurement value (e.g., Srxlev (serving cell)) related to the received signal strength measured by the electronic device 101 for cell A 510, which is the serving cell, is 27.94 dB, As it is confirmed that the cell B 520, which is the same target cell as the previous serving cell, is greater than the second threshold (eg, 24 dB) set, the cell B 520 may not be reselected because the first condition is not satisfied. When the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, the electronic device 101 determines whether the first condition is satisfied by a second threshold value that is relatively smaller than the first threshold value. By determining whether or not to do so, it is possible to continuously maintain a cell having a relatively higher priority without reselecting a cell to the same target cell as the previous serving cell.

10 is a flowchart illustrating an operating method of an electronic device according to various embodiments. Referring to FIG. 10 , according to various embodiments, an electronic device 101 (eg, the processor 120 of FIG. 1 , the first communication processor 212 of FIG. 2A , and the second communication processor 214 of FIG. 2A ) ) or at least one of the unified communication processor 260 of FIG. 2B) may perform cell search to camp on a cell. For example, the electronic device may perform a camp-on operation of operation 319 or operation 351 disclosed in 3GPP TS 36.304 or 3GPP TS 38.304 described in FIG. 3A or 3B.

According to various embodiments, the electronic device 101 may detect a cell reselection trigger. For example, the cell reselection trigger may be triggered periodically according to a set period or may be triggered when a specified condition is satisfied. The cell reselection trigger may include a trigger of operation 335 or operation 355 disclosed in 3GPP TS 36.304 or 3GPP TS 38.304 described in FIG. 3A or 3B.

According to various embodiments, the electronic device 101 may check the cell reselection priority of the serving cell and the cell reselection priority of the target cell in operation 1002 in response to detecting the cell reselection trigger. According to various embodiments, the reselection priority of the serving cell and the cell reselection priority of the target cell are, as described above, a system information block (SIB) transmitted from a base station of a communication network, a radio resource (RRC) It can be confirmed through at least one of a control) release message (RRC release message) and a dedicated message (dedicated message).

According to various embodiments, in operation 1004, the electronic device 101 may check whether the target cell is the same cell as the previous serving cell. For example, as shown in FIG. 5 described above, when cell A 520 is reselected from cell A 510 and then cell A 510 is reselected from cell B 520, cell A 510 is the cell. Corresponding to the detection of the trigger for reselection, the cell B 520 may be identified as the same cell as the previous serving cell.

According to various embodiments, in operation 804, if the target cell is determined to be a cell that is not the same as the previous serving cell (operation 804 - No), the electronic device 101 performs cell reselection set to the serving cell in operation 1006. Threshold (eg, a first threshold (eg, “Thresh _Serving.LowP ” or “Thresh _Serving.LowQ ”) or a second threshold (eg, “Thresh _X.HighP ” or “Thresh _X.HighQ ”) ), it is possible to determine whether to reselect a cell based on. For example, if the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, cell reselection may be determined based on the first threshold value and the third threshold value, and cell reselection of the serving cell may be performed. When the priority is lower than the cell reselection priority of the target cell, cell reselection may be determined based on the second threshold.

According to various embodiments, in operation 1004, if the target cell is identified as the same cell as the previous serving cell (operation 1004-yes), the electronic device 101 sets the cell reselection priority of the target cell to that of the serving cell in operation 1008. It can be checked whether it is higher than the cell reselection priority. As a result of checking in operation 1008, if the cell reselection priority of the target cell is lower than the cell reselection priority of the serving cell (operation 1008-No), the electronic device 101 selects the cell set for the serving cell in operation 1006. Whether to reselect a cell may be determined based on a threshold for reselection. For example, since the cell reselection priority of the target cell is lower than the cell reselection priority of the serving cell, cell reselection may be determined based on the first threshold and the third threshold.

According to various embodiments, as a result of checking operation 1008, if the cell reselection priority of the target cell is higher than the cell reselection priority of the serving cell (operation 1008-yes), the electronic device 101 performs the operation 1010. A first threshold for cell reselection set in the target cell (eg, “Thresh _Serving.LowP ” or “Thresh Serving.LowQ”) and a second threshold for cell reselection set in the serving cell (eg, “Thresh Serving.LowP” or “Thresh _Serving.LowQ ”) Thresh _X.HighP " or "Thresh _X.HighQ ") to compare with each other. According to various embodiments, the first threshold value may be stored in the memory of the electronic device 101 based on cell reselection from the target cell, which is the previous serving cell, to the serving cell. The first threshold value for the previous serving cell stored in the memory may be designated and stored as a specific variable (eg, “PrevReselThresh”). The first threshold value for the previous serving cell stored in the memory may be initialized when the power of the electronic device 101 is turned off. The first threshold value for the previous serving cell stored in the memory may be updated whenever cell reselection occurs in the electronic device 101 .

According to various embodiments, in operation 1012, the electronic device 101 compares the second threshold with the first threshold of the target cell, which is the previous serving cell, and determines which of the first threshold and the second threshold is greater. By determining whether the second condition is satisfied based on the large value, whether or not to reselect a cell for the target cell may be determined. When the cell reselection priority of the serving cell is lower than the cell reselection priority of the target cell, the electronic device 101 determines whether the second condition is satisfied by a relatively larger value, thereby determining whether the same as the previous serving cell is satisfied. A cell having a relatively lower priority may be continuously maintained without reselecting a cell as the target cell.

11 is a diagram illustrating an example of determining whether an electronic device satisfies a cell reselection condition according to various embodiments. Referring to FIG. 11, as described above in FIG. 10, when cell A 510 is reselected to cell B 520, cell A 510 becomes the target cell again while cell B 520 is the serving cell. , The first threshold value (eg, 32dB) of cell A 510, which is the previous serving cell and the target cell, may be compared with the second threshold value (eg, 24dB) of the cell B 520. As a result of the comparison, the electronic device 101 determines that the first threshold value (eg, 32 dB) of cell A 510, which is the previous serving cell and the target cell, is higher than the second threshold value (eg, 24 dB) of the cell B 520. Since it is greater, the first threshold value may be used as the second condition for cell reselection for the target cell instead of the second threshold value. For example, since the cell reselection priority of cell B 520, which is the serving cell, is lower than that of cell A 510, which is the target cell, the electronic device 101, as described above with reference to FIG. 5, the cell that is the target cell The second threshold (eg, Srxlev (target cell)) of 24.24 dB, which is a measurement value related to the received signal strength measured by the electronic device 101 for A (510), is set in cell B (520), which is a serving cell. “Thresh _{X. HighP} ”), instead of comparing with 24dB, it can be compared with the first threshold (eg, 32dB) set for cell A 510, which is the same target cell as the previous serving cell. As shown in FIG. 11, as a result of the comparison, the measured value (eg, Srxlev (target cell)) related to the received signal strength measured by the electronic device 101 for cell A 510, which is the target cell, is 24.24 dB, As it is confirmed that the cell A 510, which is the same target cell as the previous serving cell, is smaller than the first threshold (eg, 32 dB) set, the cell A 510 may not be reselected because the second condition is not satisfied. . When the cell reselection priority of the serving cell is lower than the cell reselection priority of the target cell, the electronic device 101 determines whether the second condition is satisfied by a first threshold that is relatively greater than the second threshold. By determining whether or not to do so, it is possible to continuously maintain a cell having a relatively lower priority without reselecting a cell to the same target cell as the previous serving cell.

12 is a diagram illustrating an example of determining whether an electronic device satisfies a cell reselection condition according to various embodiments. Referring to FIG. 12, in addition to the conditions described above in FIGS. 8 and 9, a measurement value related to the received signal strength measured by the electronic device 101 for cell A 510, which is a serving cell, (eg, Srxlev (serving cell)) ), a condition for comparing 26.03dB, which is a measured value (eg, Srxlev (target cell)) related to the received signal strength measured by the electronic device 101 for cell B 520, which is a target cell, can be further added. there is.

For example, as shown in FIG. 12, the electronic device 101, in addition to the conditions described above in FIGS. 8 and 9, relates to the received signal strength measured by the electronic device 101 for cell A 510, which is a serving cell. If the measured value (eg, Srxlev (target cell)) related to the received signal strength measured by the electronic device 101 for cell B 520, which is the target cell, is greater than the measured value (eg, Srxlev (serving cell)), the target Cell B 520, which is a cell, may be reselected. In FIG. 12, the measured value (eg, Srxlev (serving cell)) related to the received signal strength measured by the electronic device 101 for cell A 510, which is a serving cell, is higher than 27.94 dB for cell B 520, which is a target cell. Since 26.03 dB, which is a measurement value related to the received signal strength measured by the electronic device 101 (eg, Srxlev (target cell)), is smaller, cell reselection from cell A 510 to cell B 520 does not occur. may not be According to various embodiments, an offset may be additionally applied to a measurement value (eg, Srxlev (serving cell)) related to the received signal strength measured by the electronic device 101 for cell A 5100, which is the serving cell. can

13 is a diagram illustrating an example of determining whether an electronic device satisfies a cell reselection condition according to various embodiments. Referring to FIG. 13, in addition to the conditions described above in FIG. 12, a measurement value (eg, Srxlev (serving cell)) related to the received signal strength measured by the electronic device 101 for cell A 510, which is a serving cell, is 27.94. 30.94dB obtained by adding an offset by 3dB to dB can be compared with 26.03dB, which is a measurement value related to the received signal strength (e.g., Srxlev (target cell)) measured by the electronic device 101 for cell B 520, which is the target cell. there is.

14 is a flowchart illustrating a method of operating an electronic device according to various embodiments. Referring to FIG. 14 , according to various embodiments, an electronic device 101 (eg, processor 120 of FIG. 1 , first communication processor 212 of FIG. 2A , In operation 1002, the second communication processor 214 or at least one of the unified communication processor 260 of FIG. 2B) performs a cell search to camp on a cell. For example, the electronic device may perform a camp-on operation of operation 319 or operation 351 disclosed in 3GPP TS 36.304 or 3GPP TS 38.304 described in FIG. 3A or 3B.

According to various embodiments, the electronic device 101 may detect a cell reselection trigger in operation 1404 . For example, the cell reselection trigger may be triggered periodically according to a set period or may be triggered when a specified condition is satisfied. The cell reselection trigger may include a trigger of operation 335 or operation 355 disclosed in 3GPP TS 36.304 or 3GPP TS 38.304 described in FIG. 3A or 3B.

According to various embodiments, in operation 1406, the electronic device 101 may check whether the target cell is the same cell as the previous serving cell. For example, as shown in FIG. 5 described above, when cell A 520 is reselected from cell A 510 and then cell A 510 is reselected from cell B 520, cell A 510 is the cell. Corresponding to the detection of the trigger for reselection, the cell B 520 may be identified as the same cell as the previous serving cell.

According to various embodiments, in operation 1406, if the target cell is determined to be a cell that is not the same as the previous serving cell (operation 1406 - No), the electronic device 101 resets or initializes a cell reselection frequency count in operation 1408. can The cell reselection frequency count may be a value set to determine whether a ping-pong phenomenon is occurring. For example, the electronic device 101 stores at least an identifier (eg, PCID) associated with the cell as information corresponding to the previous serving cell in a memory (eg, the memory 130 of FIG. 1 or the unified communication processor 260 of FIG. 2B). memory) can be stored. The electronic device 101 compares an identifier associated with a cell corresponding to the target cell (eg, PCID of the target cell) with information corresponding to a previous serving cell stored in a memory (eg, PCID of the previous serving cell), and If it is determined that the cell is not selected, the set cell reselection frequency count may be reset to 0 or initialized to 0.

According to various embodiments, in operation 1406, if the target cell is identified as the same cell as the previous serving cell (operation 1406-Yes), the electronic device 101 may increase the cell reselection frequency count in operation 1410. For example, the electronic device 101 compares an identifier associated with a cell corresponding to the target cell (eg, PCID of the target cell) with information corresponding to a previous serving cell stored in a memory (eg, PCID of the previous serving cell), If it is identified as the same cell, the set cell reselection frequency count may be increased.

According to various embodiments, the electronic device 101 may check whether the cell reselection frequency count exceeds a set value in operation 1412 . In operation 1412, if it is determined that the cell reselection frequency count does not exceed the set value (operation 1412-No), based on the threshold value (eg, the first threshold value or the second threshold value) set as described above Cell reselection can be determined by applying the first condition or the second condition.

According to various embodiments, if it is confirmed in operation 1412 that the cell reselection frequency count exceeds a set value (operation 1412-yes), it is determined that a ping-pong phenomenon has occurred, and the electronic device 101 in operation 1414 , an offset set to a threshold for cell reselection (eg, a first threshold or a second threshold) set in a serving cell may be applied. For example, the electronic device 101 may determine whether to reselect a cell by applying a first condition or a second condition based on a threshold (eg, a first threshold value or a second threshold value) to which the set offset is applied. . According to various embodiments, the negative offset value may be applied to the first threshold value, and the positive offset value may be applied to the second threshold value.

According to various embodiments, an electronic device (eg, the electronic device 101) includes at least one antenna module; and at least one processor (eg, processor 120 of FIG. 1 , first communication processor 212 of FIG. 2A , second communication processor 214 of FIG. 2A , or integrated communications processor 260 of FIG. 2B ). At least one of), wherein the at least one processor determines, based on detecting a trigger for cell reselection, a cell reselection priority of a serving cell and a cell reselection priority of a target cell, and It is checked whether the cell is the same as the previous serving cell, and based on the confirmation that the target cell is the same as the previous serving cell, cell reselection set to the serving cell corresponding to the identified cell reselection priorities is performed. A first threshold for cell reselection and a second threshold for cell reselection set in the target cell corresponding to the identified cell reselection priorities are checked, and the first threshold and the second threshold are compared. Based on the result, it may be configured to determine whether or not to reselect a cell for the target cell.

According to various embodiments, the at least one communication processor determines the cell reselection priority of the serving cell and the target based on detecting a trigger for cell reselection between different frequencies or between different radio access technologies (RATs). It can be set to check the cell reselection priority of the cell.

According to various embodiments, the at least one communication processor may determine the first threshold value and the second threshold value based on a cell reselection priority of the serving cell being higher than a cell reselection priority of the target cell. It may be configured to determine whether to reselect a cell for the target cell using a lower value among the values.

According to various embodiments, the at least one communication processor measures the received signal strength of the serving cell based on the cell reselection priority of the serving cell being higher than the cell reselection priority of the target cell. value is compared with a lower value of the first threshold value and the second threshold value, and a measured value related to the received signal strength of the serving cell is greater than the lower value of the first threshold value and the second threshold value. Based at least on low, it may be configured to reselect a cell as the target cell.

According to various embodiments, the at least one communication processor measures the received signal strength of the target cell based on the fact that the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell. value is compared with a third threshold for cell reselection set in the serving cell, and cell reselection to the target cell is performed at least based on a measurement value related to received signal strength of the target cell being greater than the third threshold. can be set to select.

According to various embodiments, the at least one communication processor measures the received signal strength of the serving cell based on the cell reselection priority of the serving cell being higher than the cell reselection priority of the target cell. value with a measured value related to the received signal strength of the target cell, and based on at least that the measured value related to the received signal strength of the target cell is greater than the measured value related to the received signal strength of the serving cell, the target It can be set to reselect cell by cell.

According to various embodiments, the at least one communication processor may be set to further add an offset set to a measurement value related to the received signal strength of the serving cell and compare it with a measurement value related to the received signal strength of the target cell. .

According to various embodiments, the at least one communication processor may store the second threshold in a memory based on cell reselection from the previous serving cell to the serving cell.

According to various embodiments, the at least one communication processor may determine the first threshold value and the second threshold value based on a cell reselection priority of the serving cell being lower than that of the target cell. It may be configured to determine whether to reselect a cell for the target cell using a higher value among the values.

According to various embodiments, the at least one communication processor increases a cell reselection frequency count based on the confirmation that the target cell is the same as the previous serving cell, and the increased cell reselection frequency count is a set value Based on greater than, it may be set to apply an offset to the first threshold.

According to various embodiments, a method of operating an electronic device (eg, the electronic device 101), in a method of reselecting a cell in an electronic device, based on detecting a trigger for cell reselection, a serving cell checking cell reselection priorities of the target cell and cell reselection priorities of the target cell; Checking whether the target cell is the same as a previous serving cell; Based on the confirmation that the target cell is the same as the previous serving cell, a first threshold for cell reselection set in the serving cell corresponding to the identified cell reselection priorities, and the identified cell reselection checking a second threshold for cell reselection set in the target cell corresponding to priorities; and determining whether to reselect a cell for the target cell based on a comparison result between the first threshold and the second threshold.

According to various embodiments, the method, based on detecting a trigger for cell reselection between different frequencies or between different radio access technologies (RATs), the cell reselection priority of the serving cell and the cell reselection of the target cell An operation of checking the selection priority may be included.

According to various embodiments, the method may include a lower of the first threshold and the second threshold based on a cell reselection priority of the serving cell being higher than a cell reselection priority of the target cell. It may include an operation of determining whether to reselect a cell for the target cell using the value.

According to various embodiments, the method may set a measurement value related to the received signal strength of the serving cell to the first cell based on a cell reselection priority of the serving cell being higher than that of the target cell. comparing with a lower value of the first threshold value and the second threshold value; and reselecting a cell as the target cell at least based on a measurement value related to the received signal strength of the serving cell being lower than a lower value of the first threshold value and the second threshold value.

According to various embodiments, the method provides a measurement value related to the received signal strength of the target cell to the serving cell based on a cell reselection priority of the serving cell being higher than that of the target cell. comparing with a third threshold for cell reselection set in the cell; and reselecting a cell as the target cell at least based on a measurement value related to the received signal strength of the target cell being greater than the third threshold.

According to various embodiments, the method may set a measurement value related to the received signal strength of the serving cell to the target cell based on a cell reselection priority of the serving cell being higher than that of the target cell. comparing the measured value related to the received signal strength of the cell; and reselecting a cell as the target cell, at least based on a measurement value related to the received signal strength of the target cell being greater than a measurement value related to the received signal strength of the serving cell.

According to various embodiments, the method may include an operation of adding an offset set to a measurement value related to the received signal strength of the serving cell and comparing the measured value related to the received signal strength of the target cell.

According to various embodiments, the method may include an operation of storing the second threshold in a memory based on cell reselection from the previous serving cell to the serving cell.

According to various embodiments, the method may include a higher one of the first threshold and the second threshold based on a cell reselection priority of the serving cell being lower than that of the target cell. It may include an operation of determining whether to reselect a cell for the target cell using the value.

According to various embodiments, the method may further include increasing a cell reselection frequency count based on determining that the target cell is the same as the previous serving cell; and determining whether to reselect a cell for the target cell by applying an offset to the first threshold based on the increased cell reselection frequency count being greater than a set value.

Electronic devices according to various embodiments disclosed in this document may be devices of various types. The electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. An electronic device according to an embodiment of the present document is not limited to the aforementioned devices.

Various embodiments of this document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, like reference numbers may be used for like or related elements. The singular form of a noun corresponding to an item may include one item or a plurality of items, unless the relevant context clearly dictates otherwise. In this document, "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "A Each of the phrases such as "at least one of , B, or C" may include any one of the items listed together in that phrase, or all possible combinations thereof. Terms such as "first", "second", or "first" or "secondary" may simply be used to distinguish a given component from other corresponding components, and may be used to refer to a given component in another aspect (eg, importance or order) is not limited. A (e.g., first) component is said to be "coupled" or "connected" to another (e.g., second) component, with or without the terms "functionally" or "communicatively." When mentioned, it means that the certain component may be connected to the other component directly (eg by wire), wirelessly, or through a third component.

The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and is interchangeably interchangeable with terms such as, for example, logic, logical blocks, parts, or circuits. can be used as A module may be an integral part or the smallest unit of a part or part thereof that performs one or more functions. For example, according to one embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

Various embodiments of this document provide one or more instructions stored in a storage medium (eg, internal memory 136 or external memory 138) readable by a machine (eg, electronic device 101). It may be implemented as software (eg, the program 140) including them. For example, a processor (eg, the processor 120 ) of a device (eg, the electronic device 101 ) may call at least one command among one or more instructions stored from a storage medium and execute it. This enables the device to be operated to perform at least one function according to the at least one command invoked. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-temporary' only means that the storage medium is a tangible device and does not contain a signal (e.g. electromagnetic wave), and this term refers to the case where data is stored semi-permanently in the storage medium. It does not discriminate when it is temporarily stored.

According to one embodiment, the method according to various embodiments disclosed in this document may be included and provided in a computer program product. Computer program products may be traded between sellers and buyers as commodities. A computer program product is distributed in the form of a device-readable storage medium (e.g. compact disc read only memory (CD-ROM)), or through an application store (e.g. Play Store™) or on two user devices (e.g. It can be distributed (eg downloaded or uploaded) online, directly between smart phones. In the case of online distribution, at least part of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium such as a manufacturer's server, an application store server, or a relay server's memory.

According to various embodiments, each component (eg, module or program) of the above-described components may include a single object or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. there is. According to various embodiments, one or more components or operations among the aforementioned corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg modules or programs) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component among the plurality of components prior to the integration. . According to various embodiments, the actions performed by a module, program, or other component are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the actions are executed in a different order, or omitted. or one or more other actions may be added.

Claims (20)

In electronic devices,
at least one antenna module; and
and at least one communication processor for communicating with a communication network via the at least one antenna module;
The at least one communication processor,
Based on the detection of the trigger for cell reselection, check the cell reselection priority of the serving cell and the cell reselection priority of the target cell;
Check whether the target cell is the same as the previous serving cell;
Based on the confirmation that the target cell is the same as the previous serving cell, a first threshold for cell reselection set in the serving cell corresponding to the identified cell reselection priorities, and the identified cell reselection Checking a second threshold for cell reselection set in the target cell corresponding to the priorities;
The electronic device configured to determine whether to reselect a cell for the target cell based on a comparison result between the first threshold and the second threshold.
The method of claim 1, wherein the at least one communication processor,
An electronic device configured to determine the cell reselection priority of the serving cell and the cell reselection priority of the target cell based on detecting a trigger for cell reselection between different frequencies or between different radio access technologies (RATs). .
The method of claim 1, wherein the at least one communication processor,
Based on the fact that the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, a cell for the target cell is used by using a lower value of the first threshold and the second threshold. An electronic device, set to determine whether to reselect.
The method of claim 3, wherein the at least one communication processor,
Based on the fact that the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, a measurement value related to the received signal strength of the serving cell is selected from among the first threshold value and the second threshold value. compare with the lower value,
The electronic device configured to reselect a cell as the target cell at least based on a measurement value related to the received signal strength of the serving cell being lower than a lower value of the first threshold value and the second threshold value.
The method of claim 4, wherein the at least one communication processor,
Based on the fact that the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, a measurement value related to the received signal strength of the target cell is set to the third cell reselection for cell reselection set to the serving cell. Compare to the threshold,
The electronic device configured to reselect a cell as the target cell at least based on a measurement value related to the received signal strength of the target cell being greater than the third threshold.
The method of claim 3, wherein the at least one communication processor,
Based on the fact that the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, a measurement value related to the received signal strength of the serving cell is converted into a measurement value related to the received signal strength of the target cell and compare,
The electronic device configured to reselect a cell as the target cell at least based on a measurement value related to the received signal strength of the target cell being greater than a measurement value related to the received signal strength of the serving cell.
The method of claim 3, wherein the at least one communication processor,
The electronic device configured to further add an offset set to the measured value related to the received signal strength of the serving cell and compare it with the measured value related to the received signal strength of the target cell.
The method of claim 1, wherein the at least one communication processor,
Storing the second threshold in a memory based on cell reselection from the previous serving cell to the serving cell.
The method of claim 1, wherein the at least one communication processor,
Based on the fact that the cell reselection priority of the serving cell is lower than the cell reselection priority of the target cell, a cell for the target cell is used by using a higher value of the first threshold and the second threshold. An electronic device, set to determine whether to reselect.
The method of claim 1, wherein the at least one communication processor,
Based on the confirmation that the target cell is the same as the previous serving cell, increasing a cell reselection frequency count;
The electronic device is set to apply an offset to the first threshold value based on the increased cell reselection frequency count being greater than a preset value.
A method for reselecting a cell in an electronic device,
based on detecting a trigger for cell reselection, checking cell reselection priorities of a serving cell and cell reselection priorities of a target cell;
Checking whether the target cell is the same as a previous serving cell;
Based on the confirmation that the target cell is the same as the previous serving cell, a first threshold for cell reselection set in the serving cell corresponding to the identified cell reselection priorities, and the identified cell reselection checking a second threshold for cell reselection set in the target cell corresponding to priorities; and
and determining whether to reselect a cell for the target cell based on a comparison result between the first threshold and the second threshold.
The method of claim 11, wherein the method,
Based on detecting a trigger for cell reselection between different frequencies or between different radio access technologies (RATs), checking the cell reselection priority of the serving cell and the cell reselection priority of the target cell , how the electronic device operates.
The method of claim 11, wherein the method,
Based on the fact that the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, a cell for the target cell is used by using a lower value of the first threshold and the second threshold. A method of operating an electronic device, comprising determining whether to reselect.
The method of claim 13, wherein the method,
Based on the fact that the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, a measurement value related to the received signal strength of the serving cell is selected from among the first threshold value and the second threshold value. the operation of comparing to a lower value; and
Operation of the electronic device comprising reselecting a cell as the target cell at least based on a measurement value related to the received signal strength of the serving cell being lower than a lower value of the first threshold value and the second threshold value. method.
The method of claim 14, wherein the method,
Based on the fact that the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, a measurement value related to the received signal strength of the target cell is set to the third cell reselection for cell reselection set to the serving cell. comparing with a threshold; and
and reselecting a cell as the target cell at least based on a measurement value related to the received signal strength of the target cell being greater than the third threshold.
The method of claim 13, wherein the method,
Based on the fact that the cell reselection priority of the serving cell is higher than the cell reselection priority of the target cell, a measurement value related to the received signal strength of the serving cell is converted into a measurement value related to the received signal strength of the target cell and comparison operation; and
Reselecting a cell as the target cell, at least based on a measurement value related to the received signal strength of the target cell being greater than a measurement value related to the received signal strength of the serving cell.
The method of claim 13, wherein the method,
and adding an offset set to a measurement value related to the received signal strength of the serving cell and comparing it with a measurement value related to the received signal strength of the target cell.
The method of claim 11, wherein the method,
and storing the second threshold in a memory based on cell reselection from the previous serving cell to the serving cell.
The method of claim 11, wherein the method,
Based on the fact that the cell reselection priority of the serving cell is lower than the cell reselection priority of the target cell, a cell for the target cell is used by using a higher value of the first threshold and the second threshold. A method of operating an electronic device, comprising determining whether to reselect.
The method of claim 11, wherein the method,
increasing a cell reselection frequency count based on the determination that the target cell is the same as the previous serving cell; and
determining whether to reselect a cell for the target cell by applying an offset to the first threshold based on the increased cell reselection frequency count being greater than a set value; .

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