WO2020238922A1 - Communication method and apparatus - Google Patents

Abstract

The present application provides a communication method and apparatus, relating to the field of communication technology, being able to solve the problems of low energy utilization rate and poor radio link stability. Said method comprises: a terminal receiving, by means of a first receiving beam, a first beam from an access network device; and adjusting, according to the angle-of-arrival power spectrum of the first beam, the width of the first receiving beam from a first width to a second width. The width of the first receiving beam is the first width. Said method is applied in a beam width adjustment process.

Description

Communication method and device

This application claims the priority of the Chinese patent application filed with the State Intellectual Property Office of China with the application number 201910465030.2, and the priority of the Chinese patent application with the title of "communication method and device" on May 30, 2019, all of which are approved The reference is incorporated in this application.

Technical field

This application relates to the field of communication technology, and in particular to a communication method and device.

Background technique

In the fifth-generation (5G) new radio (NR) communication technology, most of the signals are beamformed through antenna arrays, and narrower beams are used to provide users with data services. Generally, the beam width of the beam is fixed, for example, the beam width

Is determined by the millimeter wave wavelength λ and the length of the antenna array, which is

There are many disadvantages in using a beam with a fixed beam width for data interaction. For example, when the beam width is too narrow, the probability of radio link failure (RLF) will increase. When the beam width is too wide, the energy consumption is too high, and the interference between the beams increases. Because the beam width is too wide, the beam gain is reduced and the beam coverage distance is shortened.

Although, there are methods for dynamically adjusting the beam width in the related art, for example, combining the position distribution of the terminal and the signal reception quality to adjust the beam width on the base station side. This method can only adjust the beam width of the base station side beam, but cannot adjust the beam width of the terminal side beam.

Summary of the invention

The embodiments of the present application provide a communication method and device, which can not only improve the stability of the wireless link, but also improve the energy utilization rate.

In order to achieve the foregoing objectives, the following technical solutions are adopted in the embodiments of this application:

In the first aspect, this application provides a communication method, which can be executed by a terminal. The terminal may be a terminal device, or a component in the terminal device (such as a chip system). The method includes: the terminal receives the first beam from the access network device through the first receive beam, and the terminal adjusts the beam width of the first receive beam from the first width to the second width according to the arrival angle power spectrum of the first beam. Wherein, the beam width of the first receiving beam is the first width.

In the communication method provided by this application, the terminal receives the first beam from the access network device through the first receiving beam, and then adjusts the beam width of the first receiving beam from the first width to the second according to the arrival angle power spectrum of the first beam. width. Wherein, the beam width of the first receiving beam is the first width. Compared with the prior art, the beam width of the first receiving beam is fixed, and flexible configuration of the beam width cannot be realized. The communication method provided by the embodiments of the present application can flexibly adjust the beam width of the first receiving beam based on the arrival angle power spectrum of the first beam, enhance the flexibility and robustness of the beam width adjustment, and can avoid the bandwidth caused by excessive beam width. The problems of high energy consumption and mutual interference between beams can also avoid the problem of instability of the wireless link caused by the narrow beam, and improve the stability of the wireless link. Since the beam width of the first receiving beam can be dynamically adjusted and is in an optimal width state, the energy utilization rate and the stability of the wireless link are improved, and the communication quality is ensured.

In a possible design, the terminal adjusts the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam, which specifically includes: the terminal according to the arrival angle power of the first beam The spectrum determines the target width, and when the target width is less than or equal to the preset beam width, the terminal adjusts the beam width of the first receiving beam from the first width to the target width, and the target width is the second width. Among them, the preset beam width is the beam width of the beam currently used by the terminal.

Here, since the beam currently used by the terminal can perform normal data interaction with the access network equipment, if the beam width of the first receiving beam is equal to the preset beam width, the terminal uses the first receiving beam with the same beam width, and the same can be done. Perform normal data interaction with access network equipment. Since the beam width is smaller, the corresponding beam gain is larger, and the reachable distance of the beam is larger. If the beam width of the first receiving beam is smaller than the preset beam width, the terminal uses the first receiving beam with a smaller beam width , Can still carry out normal data interaction with the access network equipment.

In a possible design, the terminal adjusts the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam, which specifically includes: the terminal according to the arrival angle power of the first beam The spectrum determines the target width. When the target width is greater than the preset beam width, and the reference signal received power corresponding to the target width is greater than or equal to the preset power value, the terminal adjusts the beam width of the first receive beam from the first width to the target width, The target width is the second width. The preset power value may be the received power threshold value of the synchronization signal block SSB.

In this way, when the target width is greater than the preset beam width, the terminal may then determine whether the reference signal received power corresponding to the target width is greater than the SSB received power threshold. When the reference signal receiving power corresponding to the target width is greater than the SSB receiving power threshold, it means that the beam corresponding to the target width can ensure the communication between the terminal and the access network device, and the beam width of the first receiving beam is adjusted to After the target width, normal communication between the terminal and the access network device can also be guaranteed.

In a possible design, the terminal adjusts the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam, which specifically includes: the terminal according to the arrival angle power of the first beam The spectrum determines the target width. When the target width is greater than the preset beam width and the reference signal received power corresponding to the target width is less than the preset power value, the terminal determines the beam width set and adjusts the beam width of the first receive beam from the first width to The first candidate beamwidth. Among them, the first candidate beam width is the second width, the first candidate beam width belongs to the beam width set, the difference between the first candidate beam width and the target width is the smallest, and the reference signal received power corresponding to the first candidate beam width is greater than or Equal to the preset power value. The beam width set includes at least one candidate beam width, each candidate beam width corresponds to a reference signal received power, and each candidate beam width is smaller than the target width. The preset power value may be the synchronization signal block SSB received power threshold.

In this way, when the target width is greater than the preset beam width, and the reference signal received power corresponding to the target width is less than or equal to the SSB received power threshold, it means that the beam corresponding to the target width cannot guarantee the connection between the terminal and the access network device. Communication, the terminal determines the beam width set based on the target width, and selects the first candidate beam width with the smallest difference from the target width and with the reference signal received power greater than or equal to the preset power value as the second width, so as to compare the first received beam The adjustment of the beam width can not only ensure the normal communication between the terminal and the access network equipment, but also avoid the problem of inter-beam interference caused by the excessive beam width.

In a possible design, the terminal determines the target width according to the arrival angle power spectrum of the first beam, which specifically includes: the terminal determines the angle expansion of the first beam according to the arrival angle power spectrum of the first beam, and the angle expansion is the target width Or, the terminal determines the target width according to the adjustment coefficient and the angle expansion of the first beam. The adjustment coefficient is determined according to the motion state of the terminal and/or the interference degree of the first beam, and the interference degree of the first beam is related to the reference signal received power and/or signal-to-noise ratio of the first beam.

In this way, the terminal can determine the angle expansion of the first beam according to the arrival angle power spectrum of the first beam, and use the value of the angle expansion as the value of the target width to ensure the effective connection between the first beam and the first receiving beam, and ensure the information Transmission quality. Since both the motion state of the terminal and the interference degree of the first beam can affect the beam connection status, the terminal combines the motion state and the interference degree of the first beam to determine the adjustment coefficient, and then combines the value of the angle expansion to determine the value of the target width. Ensure the effective connection between the first beam and the first receiving beam, and ensure the quality of information transmission.

In a possible design, the motion state includes the moving speed of the terminal and/or the rotating speed of the terminal.

In a possible design, the communication method of the embodiment of the present application further includes: the terminal obtains the reference signal received power and the signal-to-noise ratio of the first beam, and determines the first beam according to the reference signal received power and the signal-to-noise ratio of the first beam The degree of interference.

In a possible design, the movement state includes a first movement state and a second movement state, the movement speed of the first movement state is greater than the movement speed of the second movement state, and the interference degree of the first beam includes the first interference degree and the second movement state. The second interference degree, the first interference degree is higher than the second interference degree, the terminal determines the adjustment coefficient according to its own motion state and the interference degree of the first beam, which specifically includes: when the motion state of the terminal is the first mobile state, and the first When the interference degree of the beam is the first interference degree, the terminal determines that the adjustment coefficient is the first value. When the movement state of the terminal is the second movement state, and the interference degree of the first beam is the first interference degree, the terminal determines that the adjustment coefficient is a second value, and the second value is smaller than the first value. When the movement state of the terminal is the first movement state and the interference degree of the first beam is the second interference degree, the terminal determines that the adjustment coefficient is a third value, and the third value is less than the first value. When the movement state of the terminal is the second movement state and the interference degree of the first beam is the second interference degree, the terminal determines that the adjustment coefficient is a fourth value, which is greater than the second value and less than the third value. Or, the adjustment factor is a preset value.

In a second aspect, the present application provides a communication device, which may be the terminal in the above-mentioned first aspect. The device includes a processor and a receiver. The receiver is configured to receive the first beam from the access network device through the first receiving beam, and the beam width of the first receiving beam is the first width. The processor is configured to adjust the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam.

In a possible design, the processor is configured to adjust the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam, including: Angular power spectrum to determine the target width;

It is used to adjust the beam width of the first receiving beam from the first width to the target width when the target width is less than or equal to the preset beam width, and the target width is the second width.

In a possible design, the processor is configured to adjust the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam, including: Angular power spectrum to determine the target width;

When the target width is greater than the preset beam width, and the reference signal received power corresponding to the target width is greater than or equal to the preset power value, adjust the beam width of the first receive beam from the first width to the target width, and the target width is the first Two width.

In a possible design, the processor is configured to adjust the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam, including: for the terminal according to the wave of the first beam Determine the target width by reaching the angle power spectrum;

Used to determine the beam width set when the target width is greater than the preset beam width and the reference signal received power corresponding to the target width is less than the preset power value. The beam width set includes at least one candidate beam width, and each candidate beam width corresponds to a reference Signal received power, and each candidate beam width is smaller than the target width;

Used to adjust the beam width of the first receiving beam from the first width to the first candidate beam width, the first candidate beam width is the second width, the first candidate beam width belongs to the beam width set, and the first candidate beam width is the target width The difference between is the smallest, and the reference signal received power corresponding to the first candidate beamwidth is greater than or equal to the preset power value.

In a possible design, the processor is configured to determine the target width according to the arrival angle power spectrum of the first beam, including: determining the angle expansion of the first beam according to the arrival angle power spectrum of the first beam, and the angle expansion is Target width

or,

It is used to determine the target width according to the adjustment coefficient and the angle expansion of the first beam, where the adjustment coefficient is determined according to the motion state of the communication device and/or the interference degree of the first beam, and the interference degree of the first beam is the same as that of the first beam. The reference signal received power and/or signal-to-noise ratio.

In a possible design, the motion state includes the moving speed of the communication device and/or the rotation speed of the communication device.

In a possible design, the processor is further configured to: obtain the reference signal received power and the signal-to-noise ratio of the first beam; and determine the interference degree of the first beam according to the reference signal received power and the signal-to-noise ratio of the first beam.

In a possible design, the movement state includes a first movement state and a second movement state, the movement speed of the first movement state is greater than the movement speed of the second movement state, and the interference degree of the first beam includes the first interference degree and the second movement state. The second degree of interference, the first degree of interference is higher than the second degree of interference, the processor is used to determine the adjustment coefficient according to its own motion state and the interference degree of the first beam, including: when the motion state of the communication device is the first In a mobile state and the interference level of the first beam is the first interference level, determining the adjustment coefficient to be the first value;

When the motion state of the communication device is the second motion state, and the interference degree of the first beam is the first interference degree, determine that the adjustment coefficient is a second value, and the second value is less than the first value;

When the motion state of the communication device is the first motion state and the interference degree of the first beam is the second interference degree, determine that the adjustment coefficient is a third value, and the third value is less than the first value;

Used for determining that the adjustment coefficient is a fourth value when the movement state of the communication device is the second movement state and the interference degree of the first beam is the second interference degree, and the fourth value is greater than the second value and less than the third value;

Or, the adjustment factor is a preset value.

In a third aspect, the present application provides a communication device for implementing the functions of the first terminal device in the first aspect.

In a fourth aspect, an embodiment of the present application provides a communication device, which has the function of implementing the communication method in the first aspect. This function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions.

In a fifth aspect, an embodiment of the present application provides a communication device including: a processor and a memory; the memory is used to store computer execution instructions, and when the communication device is running, the processor executes the computer execution instructions stored in the memory, This allows the communication device to execute the communication method in the first aspect described above.

In a sixth aspect, an embodiment of the present application provides a communication device, including: a processor; the processor is configured to couple with a memory, and after reading an instruction in the memory, execute the communication method as in the above first aspect according to the instruction.

In a seventh aspect, embodiments of the present application provide a computer-readable storage medium that stores instructions in the computer-readable storage medium, which when run on a computer, enables the computer to execute the communication method in the first aspect.

In an eighth aspect, embodiments of the present application provide a computer program product containing instructions, which when run on a computer, enable the computer to execute the communication method in the first aspect.

In a ninth aspect, an embodiment of the present application provides a circuit system, the circuit system includes a processing circuit, and the processing circuit is configured to execute the communication method as in the foregoing first aspect.

In a tenth aspect, an embodiment of the present application provides a chip. The chip includes a processor. The processor is coupled with a memory. The memory stores program instructions. When the program instructions stored in the memory are executed by the processor, the communication method in the first aspect is implemented. .

In an eleventh aspect, an embodiment of the present application provides a communication system. The communication system includes a terminal and an access network device in any of the foregoing aspects.

Among them, the technical effects brought about by any of the design methods from the second aspect to the eleventh aspect can be referred to the technical effects brought about by the different design methods in the first aspect, which will not be repeated here.

Description of the drawings

Fig. 1 is a schematic diagram of a communication system provided by an embodiment of the application;

FIG. 2 is a flowchart of a communication method provided by an embodiment of this application;

FIG. 3 is a schematic diagram of the angle of arrival power spectrum provided by an embodiment of the application;

FIG. 4 is a schematic diagram of a measurement scene of the angle of arrival power spectrum provided by an embodiment of the application;

5 to 11 are flowcharts of communication methods provided by embodiments of this application;

FIG. 12 and FIG. 13 are schematic diagrams of the structure of a communication device provided by an embodiment of this application.

Detailed ways

The terms "first" and "second" in the description of the application and the drawings are used to distinguish different objects, or to distinguish different processing of the same object, rather than describing a specific order of objects. In addition, the terms "including" and "having" and any variations thereof mentioned in the description of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes other steps or units that are not listed, or optionally also Including other steps or units inherent to these processes, methods, products or equipment. It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations, or illustrations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as "exemplary" or "for example" are used to present related concepts in a specific manner.

In order to make the embodiments of the present application clearer, first, a brief introduction is made to some terms involved in the embodiments of the present application.

Beam:

One of the main problems of high-frequency communication is that the signal energy drops sharply with the transmission distance, resulting in a short signal transmission distance. In order to overcome this problem, high-frequency communication adopts analog beam technology, and performs weighting processing through a large-scale antenna array to concentrate the signal energy in a small range to form a beam-like signal (called analog beam, or beam for short). ) To increase the transmission distance.

The beam is a communication resource. The beam can be a wide beam, or a narrow beam, or other types of beams. The beam forming technology may be beamforming technology or other technical means. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, and a hybrid digital/analog beamforming technology. Different beams can be considered as different resources. The same information or different information can be sent through different beams.

The beam includes a transmitting beam and a receiving beam. The transmit beam may refer to the distribution of signal strength formed in different directions in space after a signal is transmitted through the antenna, and the receive beam may refer to the distribution of the antenna array to strengthen or weaken the reception of wireless signals in different directions in space.

Beamwidth:

In the antenna pattern, the angular distance between the half-power points of the beam is the beam width, also known as 3dB-half-power-beamwidth (HPBW).

The beam width is divided into horizontal beam width and vertical beam width. Among them, the horizontal beam width means: in the horizontal direction, on both sides of the maximum radiation direction, the angle between the two directions at which the radiation power drops by 3dB. The vertical beam width represents the angle between the two directions at which the radiation power drops by 3dB on both sides of the maximum radiation direction in the vertical direction.

A beam with a narrow beam width can increase the beam gain, thereby reducing cross-link interference, but will increase the probability of radio link failure (RLF) and reduce the stability of the radio link.

A beam with a wider beam width can reduce the probability of beam switching and beam failure, but it increases interference between beams and consumes too much energy. Because the beam width is too wide, correspondingly, the beam gain is reduced, and the coverage distance of the beam is also reduced.

The beam with the best beam width can improve energy utilization and spectrum efficiency, ensure communication quality, and also help improve the flexibility and robustness of beam tracking, and avoid the phenomenon of beam direction misalignment.

Beam gain:

Under the condition of equal input power, the ratio of the power density of the signal generated by the radiating element of the actual antenna and the ideal antenna at the same point in space. Among them, the ideal antenna refers to an omnidirectional point source antenna. The beam gain characterizes the concentration of energy. In the case of a certain power, the larger the beam width, the smaller the beam gain.

Beam connection:

In the beamforming technology, in the downlink direction, the access network equipment uses the antenna array to align the location of the terminal to form a transmission beam; the terminal uses the antenna array to align the location of the access network device to the location of the access network device, and receives the access network equipment through the receiving beam. Launch the beam. In the upstream direction, the terminal uses the antenna array to align the location of the access network device to form a transmission beam, and the access network device uses the antenna array to align the location of the terminal, and receives the transmission beam of the terminal through the receiving beam. The transmit beam and the receive beam need to be aligned (that is, both the access network equipment and the terminal know the corresponding beam directions) to ensure high communication quality. When the beam reciprocity is satisfied, in the communication process between a terminal and a certain access network device, the transmitting beam and receiving beam of the terminal can be the same beam, and the transmitting beam and receiving beam of the access network device can also be the same Beam.

In the downlink direction, the better the alignment between the transmit beam of the access network device and the receive beam of the terminal, the greater the signal gain provided by the transmit beam and the receive beam. Similarly, in the uplink direction, the better the alignment between the transmitting beam of the terminal and the receiving beam of the access network device, the greater the signal gain provided by the transmitting beam and the receiving beam.

In related technologies, the beam width of the beam is usually fixed, for example, the beam width

L is determined by the millimeter wave wavelength λ and the antenna array length, namely

Because the beam width is fixed and cannot be adjusted dynamically, it cannot be applied to dynamically changing spatial channel characteristics and terminal motion status. There are phenomena of excessive beam width or beam width too narrow, and low energy efficiency, Poor wireless link stability and other issues.

The method provided by the embodiment of the present application can improve the energy utilization rate and the stability of the wireless link. The method provided in the embodiments of the present application can be applied to a communication system including an access network device and a terminal. The access network equipment communicates with the terminal. Exemplarily, referring to FIG. 1, the first beam of the access network device is aligned with the first receiving beam of the terminal. At the moment of receiving the first receiving beam of the terminal, the access network device sends information to the terminal through the first beam. Such as response information.

The access network equipment may be a device deployed in a radio access network (radio access network, RAN for short) to provide a terminal with a wireless communication function, such as a base station. The access network equipment can be various forms of macro base stations, micro base stations (also called small stations), relay stations, access points (AP for short), etc., and can also include various forms of control nodes, such as network control Device. The control node may be connected to multiple base stations and configure resources for multiple terminals under the coverage of the multiple base stations. In systems that use different wireless access technologies, the names of devices with base station functions may be different, for example, global system for mobile communication (GSM) or code division multiple access (code division multiple) Access, CDMA for short) can be called base transceiver station (BTS for short) in a network, and it can be called a base station (NodeB) in wideband code division multiple access (WCDMA for short), and in LTE systems It can be called an evolved NodeB (eNB or eNodeB for short), and it can be called a next generation node base station (gNB) in a 5G communication system or NR communication system. This application does not make any reference to the specific name of the base station. limited. The access network equipment can also be the wireless controller in the cloud radio access network (CRAN) scenario, the network equipment in the future evolved public land mobile network (PLMN) network, Transmission and reception point (transmission and reception point, TRP for short), etc.

The terminal can also be called user equipment (UE), terminal equipment, access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile equipment, user terminal, wireless communication equipment, user agent or User device. The terminal can be a mobile station (MS), subscriber unit (subscriber unit), drone, IoT device, station (ST) in wireless local area networks (WLAN), cell phone (cellular phone), smart phone (smart phone), cordless phone, wireless data card, tablet computer, session initiation protocol (SIP) phone, wireless local loop (wireless local loop, WLL) station, Personal digital assistant (PDA) equipment, laptop computer, machine type communication (MTC) terminal, handheld device with wireless communication function, computing device or connected to wireless modem Other processing equipment, vehicle-mounted equipment, wearable equipment (also called wearable smart equipment). The terminal may also be a terminal in a next-generation communication system, for example, a terminal in a 5G communication system or a terminal in a future evolved PLMN, a terminal in an NR communication system, and so on.

It should be noted that one access network device can send the first beams to multiple terminals at the same time, and one terminal can also simultaneously receive the first beams of multiple access network devices through multiple first receiving beams. Figure 1 shows only one access network device and one terminal.

The technical solutions of the embodiments of the present application can be applied to various communication systems. For example: Orthogonal Frequency-Division Multiple Access (OFDMA), Single Carrier Frequency-Division Multiple Access (Single Carrier FDMA, SC-FDMA) and other systems. The term "system" can be replaced with "network". Among them, the OFDMA system can implement wireless technologies such as evolved universal terrestrial radio access (E-UTRA) and ultra mobile broadband (UMB). E-UTRA is an evolved version of the Universal Mobile Telecommunications System (UMTS). The 3rd generation partnership project (3GPP) uses the new version of E-UTRA in long term evolution (LTE) and various versions based on LTE evolution. The 5G communication system and the new radio (NR) communication system are next-generation communication systems under study. In addition, the communication system may also be applicable to future-oriented communication technologies, all of which are applicable to the technical solutions provided in the embodiments of the present application.

The embodiment of the present application provides a communication method, which is applied in the process of adjusting the receiving beam width of the terminal.

In the following, the communication method provided by the embodiment of the present application will be described. As shown in Fig. 2 for details, the communication method of the embodiment of the present application includes the following steps:

S201. The access network device sends the first beam to the terminal. Correspondingly, the terminal receives the first beam from the access network device through the first receiving beam.

Among them, there may be multiple types of information carried by the first beam, such as service response information. For example, before the access network device sends the first beam to the terminal, the terminal sends a service request to the access network device. At the receiving moment of the first receiving beam, the access network device sends service response information to the terminal through the first beam. Correspondingly, the terminal receives the service response information through the first receiving beam.

The first receiving beam may be a beam formed by the terminal using a millimeter wave antenna array and beamforming technology. The beam width of the first receiving beam is the first width. The first width may be a value arbitrarily determined by the terminal, or may be a value after beam width adjustment.

S202: The terminal adjusts the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam.

Among them, the direction of arrival (DOA) power spectrum is used to represent the angle and power when the multipath channel components of different paths reach the terminal. The angle of arrival power spectrum can show the spatial distribution characteristics of the beam. Due to the scattering in the existing environment, the first beam will have angular spread (AS) when reaching the terminal. The angle expansion of the first beam can be obtained based on the power spectrum of the arrival angle of the first beam.

Exemplarily, refer to FIG. 3, which shows the angle of arrival power spectrum in a scenario. Figure 3 shows the signal power of the two multipaths. Among them, the multipath with the larger signal power peak is transmitted directly from the access network device to the terminal, and the multipath with the smaller signal power peak is transmitted from the access network device to the terminal through strong reflection. In the angle of arrival power spectrum, the average power represents the average value of the power of all multipath channel components at each angle of the terminal. The average power can be characterized: the average signal power distributed at all angles of the terminal after the signal emitted by the access network device reaches the terminal after the reflection, diffraction, scattering, and refraction of the channel. The average value is the value corresponding to the average power.

There are many ways to obtain the angle of arrival power spectrum. For example, the terminal uses a channel estimation algorithm to obtain the angle of arrival power spectrum of the first beam. Among them, the channel estimation algorithm may be a multi-signal classification algorithm (also known as the MUSIC algorithm). For another example, when the direction of the antenna array of the access network device is unchanged, the terminal rotates the directional antenna to simulate a multi-antenna antenna array, similar to a single input multiple output (SIMO) system. In this case, the terminal can Get the power at different angles. Wherein, the number of directional antennas may be one or more.

Exemplarily, referring to Fig. 4, the access network device is used as the transmitting end, and the antenna array direction is unchanged. At time t, the transmitted signal is denoted as u(t). In the signal transmission process, there are multiple paths. For example, path 1, path 2, ..., path L all represent a multipath channel component. Among them, the path (path) 1 belongs to the direct path, and the path (path) 2 to the path (path) L are all transmitted through the reflection effect of the scatterer. As the receiving end, the terminal continuously changes the angle of the antenna array, and each time the angle of the antenna array is changed, a power value can be obtained. For example, the terminal obtains N power values, which are respectively denoted as y ₁ (t), y ₂ (t), ..., y _n (t), ..., y _N (t).

Wherein, the second width may be a width obtained based on the angular expansion of the first beam. Exemplarily, the width value of the second width may be the value of the angle expansion of the first beam, or the width value after the angle expansion adjustment may be selected.

Since the first beam can be received by the terminal, adjust the beam width of the first receiving beam with reference to the angle of arrival power spectrum of the first beam to ensure the effective connection between the first beam and the first receiving beam, and ensure the quality of information transmission . Referring to Figures 5 to 10, the specific implementation process of S202 may include S2021, and any of the steps in S2022, S2023, and S2024:

S2021: The terminal determines the target width according to the arrival angle power spectrum of the first beam.

Wherein, the target width is the width that the first receiving beam needs to reach during the beam width adjustment process. The value of the target width may be the value of the angle expansion of the first receiving beam, or the width value after the angle expansion adjustment may be selected.

As a possible implementation, see Figure 5, S2021 can be implemented as S20211:

S20211. The terminal determines the angle extension of the first beam according to the arrival angle power spectrum of the first beam.

Among them, the angular expansion of the first beam is the target width.

Exemplarily, the angle extension of the first beam satisfies the following formula:

Among them, AS represents the angular spread of the first beam, M represents the number of multipath channel components in the first beam in the horizontal direction, N represents the number of multipath channel components in the first beam in the vertical direction, and P _{n, m} represents the power of the m-th multipath channel component in the horizontal direction and the n-th multipath channel component in the vertical direction.

Represents the angle at which the m-th multipath channel component in the horizontal direction and the n-th multipath channel component in the vertical direction reaches the terminal.

In this way, the terminal can determine the angle expansion of the first beam according to the arrival angle power spectrum of the first beam, and use the value of the angle expansion as the value of the target width to ensure the effective connection between the first beam and the first receiving beam, and ensure the information Transmission quality.

As another possible implementation manner, referring to Figure 6, S2021 can be implemented as S20212:

S20212, the terminal determines the target width according to the adjustment coefficient and the angle expansion of the first beam.

Exemplarily, the target width, the adjustment coefficient, and the angle extension of the first beam satisfy the following formula:

BeamWidth-optimal=AS×α (2)

Among them, BeamWidth-optimal represents the target width, AS represents the angle expansion of the first beam, and α represents the adjustment coefficient.

Among them, the adjustment coefficient may be a pre-configured value, such as a value configured by a terminal or an access network device.

Wherein, the adjustment coefficient may also be determined according to the motion state of the terminal. Different motion states of the terminal correspond to different adjustment coefficients. The terminal can be moved or rotated.

If the terminal is in a mobile state, the position of the terminal relative to the access network device changes. At this time, the beam width of the first receiving beam needs to be increased to ensure that the first receiving beam and the first beam are always in a connected state, and the probability of beam switching is reduced. There are many ways for the terminal to obtain the moving speed. For example, the terminal can obtain the moving speed through an accelerometer. For another example, the terminal determines the moving speed through the Doppler frequency offset.

Exemplarily, at time ti, the terminal obtains the Doppler frequency offset f _d,ti based on the phase tracking reference signal _, and the moving speed of the terminal satisfies the following formula:

v=f _{d, ti} ×λ (3)

Among them, v represents the moving speed of the terminal, f _{d, ti} represent the Doppler frequency deviation, and λ represents the wavelength of the first beam (or the first receiving beam). Since the frequencies of the first beam and the first receiving beam are the same, the wavelengths of the two beams are the same.

If the terminal is in a rotating state, the beam transmitting device inside the terminal, such as an antenna array, is also in a rotating state, and the beam emitted by the antenna array will also change relative to the access network equipment. At this time, it is also necessary to increase the beam width of the first receiving beam. The different motion states of the terminal may include: the rotation speed of the terminal is the same and the movement speed is different; the rotation speed of the terminal is different, and the movement speed is the same; the rotation speed and the movement speed of the terminal are both different. There are many ways for the terminal to obtain the rotation speed. For example, the terminal can obtain the rotation speed through a gyroscope.

Wherein, the adjustment coefficient may also be determined according to the interference degree of the first beam. The interference degree of the first beam is different, and the corresponding adjustment coefficient is also different. The interference level of the first beam can be determined according to the reference signal received power of the first beam. For example, when the reference signal received power of the first beam is greater than the reference signal received power threshold, the terminal determines that the interference level of the first beam is strong interference. When the reference signal received power of the beam is less than or equal to the reference signal received power threshold, the terminal determines that the interference degree of the first beam is weak interference. The interference degree of the first beam can also be determined according to the signal-to-noise ratio of the first beam. For example, when the signal-to-noise ratio of the first beam is less than or equal to the signal-to-noise ratio threshold, the terminal determines that the interference degree of the first beam is strong interference. When the signal-to-noise ratio of the beam is greater than the signal-to-noise ratio threshold, the terminal determines that the interference degree of the first beam is weak interference. The degree of interference of the first beam can also be determined according to the received power of the reference signal and the signal-to-noise ratio. If the reference signal received power of the first beam is greater than the reference signal received power threshold, and the signal-to-noise ratio of the first beam is less than or equal to the signal-to-noise ratio threshold, the terminal determines that the interference degree of the first beam is strong interference; otherwise, the terminal It is determined that the interference degree of the first beam is weak interference. Among them, the reference signal received power threshold can be -95dB, and the signal-to-noise ratio threshold can be -30dB.

It should be noted that both the reference signal received power threshold and the signal-to-noise ratio threshold can be adjusted according to actual application scenarios. For example, the reference signal received power threshold is adjusted from -95dB to -94dB. Adjust the signal-to-noise ratio threshold from -30dB to -29dB.

Then, the specific implementation process of "determining the interference degree of the first beam based on the reference signal received power and the signal-to-noise ratio" will be described. Referring to FIG. 7, before determining the target width based on the adjustment coefficient, the terminal may also perform steps S203 and S204:

S203. The terminal obtains the reference signal received power and the signal-to-noise ratio of the first beam.

The reference signal received power represents the average value of the signal power received on all resource elements (resource elements, RE) that carry the reference signal in a certain orthogonal frequency division multiplexing (OFDM) symbol. As a possible implementation method, on the pre-configured operating frequency, the terminal detects the primary synchronization signal (PSS) and the secondary synchronization signal (SSS) within a preset time window, and then detects PSS and SSS to get the reference signal received power.

Among them, the signal-to-noise ratio is the ratio of the power of the effective component in the signal to the power of the noise component.

S204. The terminal determines the degree of interference of the first beam according to the reference signal received power and the signal-to-noise ratio of the first beam.

Exemplarily, if the reference signal received power is greater than the reference signal received power threshold, and the signal-to-noise ratio is greater than or equal to the signal-to-noise ratio threshold, the terminal determines that the interference degree of the first beam is strong interference. If the reference signal received power is less than or equal to the reference signal received power threshold, or the signal-to-noise ratio is less than the signal-to-noise ratio threshold, the terminal determines that the interference degree of the first beam is weak interference.

In this way, the terminal determines the degree of interference of the first beam in combination with the reference signal received power and the signal-to-noise ratio of the first beam, which has high accuracy and also helps to improve the accuracy of the first receive beam width adjustment.

Wherein, the adjustment coefficient may be determined according to the motion state of the terminal and the interference degree of the first beam. For example, the movement state includes a first movement state and a second movement state. The movement speed of the first movement state is greater than that of the second movement state. The interference degree of the first beam includes the first interference degree and the second interference degree. The interference level is higher than the second interference level. At this time, the result of the adjustment coefficient determined by the terminal is as follows: When the motion state of the terminal is the first movement state, and the interference level of the first beam is the first interference level, the terminal determines the adjustment coefficient Is the first value; when the movement state of the terminal is the second movement state, and the interference degree of the first beam is the first interference degree, the terminal determines that the adjustment coefficient is the second value, and the second value is less than the first value; When the movement state is the first movement state, and the interference degree of the first beam is the second interference degree, the terminal determines that the adjustment coefficient is a third value, and the third value is less than the first value; when the movement state of the terminal is the second movement state, And when the interference degree of the first beam is the second interference degree, the terminal determines that the adjustment coefficient is a fourth value, and the fourth value is greater than the second value and less than the third value.

Exemplarily, see Table 1. Table 1 shows a way of determining the adjustment coefficient based on the moving speed and the degree of interference. In Table 1, high-speed movement can be regarded as the first movement state, medium-speed movement can be regarded as the second movement state, low-speed movement can be regarded as the third movement state, and stationary can be regarded as the fourth movement state. Strong interference can be used as the first interference level, and weak interference can be used as the second interference level. Referring to Table 1, when the motion state of the terminal is "high-speed movement" and the interference level of the first beam is "strong interference", the value of the adjustment coefficient α is 1.15; when the terminal's motion state is "high-speed movement", and When the interference degree of the first beam is "weak interference", the value of the adjustment coefficient α is 1.30.

Table 1

Adjustment factor α	High speed movement	Medium speed	Slow moving	still
Strong interference	1.15	1.10	1.05	1.00
Weak interference	1.30	1.20	1.10	1.00

Wherein, the terminal determines the motion state according to the comparison result of the moving speed and the moving speed threshold. For example, the moving speed threshold may include a first moving speed threshold and a second moving speed threshold, and the first moving speed threshold is greater than the second moving speed threshold. If the moving speed of the terminal is greater than or equal to the first moving speed threshold, the terminal determines that it is "moving at high speed", which belongs to the first motion state. If the moving speed of the terminal is greater than or equal to the second moving speed threshold and less than the first moving speed threshold, the terminal determines that it is “moving at a medium speed” and belongs to the second moving state. If the moving speed of the terminal is not zero and is less than the second moving speed threshold, the terminal determines that it is "moving at a low speed" and belongs to the third motion state. If the moving speed of the terminal is zero, the terminal determines that it is "stationary" and belongs to the fourth movement state. Exemplarily, the first moving speed threshold is 30km/h, and the second moving speed threshold is 10km/h.

It should be noted that the first moving speed threshold, the second moving speed threshold, and the adjustment coefficient α can all be adjusted according to actual application scenarios. For example, the first moving speed threshold is adjusted from 30km/h to 31km/h. Adjust the adjustment coefficient α when the terminal is "highly moving" and the first beam is "strong interference" from 1.15 to 1.16.

Exemplarily, see Table 2. Table 2 shows a way of determining the adjustment coefficient based on the rotation speed and the degree of interference. In Table 2, high-speed rotation can be regarded as the first movement state, medium-speed rotation can be regarded as the second movement state, low-speed rotation can be regarded as the third movement state, and stationary can be regarded as the fourth movement state. Strong interference can be used as the first interference level, and weak interference can be used as the second interference level. Referring to Table 2, when the motion state of the terminal is "high-speed rotation" and the interference degree of the first beam is "strong interference", the value of the adjustment coefficient α is 1.15; when the terminal motion state is "high-speed rotation", and When the interference degree of the first beam is "weak interference", the value of the adjustment coefficient α is 1.30.

Table 2

Adjustment factor α	High speed rotation	Medium speed	Low speed rotation	still
Strong interference	1.15	1.10	1.05	1.00
Weak interference	1.30	1.20	1.10	1.00

Among them, the terminal determines the motion state according to the comparison result of the rotation speed and the rotation speed threshold. For example, the rotation speed threshold value may include a first rotation speed threshold value and a second rotation speed threshold value, and the first rotation speed threshold value is greater than the second rotation speed threshold value. If the rotation speed of the terminal is greater than or equal to the first rotation speed threshold, the terminal determines that it is "high-speed rotation" and belongs to the first motion state. If the rotation speed of the terminal is greater than or equal to the second rotation speed threshold and less than the first rotation speed threshold, the terminal determines that it is "medium speed rotation" and belongs to the second movement state. If the rotation speed of the terminal is not zero and is less than the second rotation speed threshold, the terminal determines that it is "rotating at a low speed" and belongs to the third motion state. If the rotation speed of the terminal is zero, the terminal determines that it is "stationary" and belongs to the fourth movement state. Exemplarily, the first rotation speed threshold is 10 revolutions per minute (rpm), and the second rotation speed threshold is 5 rpm.

It should be noted that the first rotation speed threshold, the second rotation speed threshold, and the adjustment coefficient α can all be adjusted according to actual application scenarios. For example, the first rotation speed threshold is adjusted from 10 rpm to 8 rpm. Adjust the adjustment coefficient α when the terminal is in "high rotation" and the interference degree of the first beam is "strong interference", from 1.15 to 1.16.

If the terminal rotates and moves at the same time, it needs to determine the state of the rotation and movement separately, and finally select the largest adjustment coefficient as the final adjustment coefficient. For example, the interference degree of the first beam is "strong interference", and the motion state of the first terminal is: "highly moving" and "medium speed rotation". At this time, in conjunction with Table 1, when the interference degree of the first beam is "strong interference" and the motion state of the first terminal is "highly mobile", the value of the adjustment coefficient α is 1.15. With reference to Table 2, when the interference degree of the first beam is "strong interference" and the motion state of the first terminal is "medium speed rotation", the value of the adjustment coefficient α is 1.10. Since 1.15 is greater than 1.10, the final adjustment factor is 1.15.

Since both the motion state of the terminal and the interference level of the first beam can affect the beam connection status, the terminal combines the motion state and the interference level of the first beam to determine the adjustment coefficient to provide a basis for the adjustment of the first receiving beam width and ensure information transmission quality.

After the terminal determines the target width based on the arrival angle power spectrum of the first beam, the value of the target width is different in different scenarios. Possible situations include: the target width is less than the preset beam width, and the target width is equal to the preset beam The width and target width are greater than the preset beam width. Among them, the preset beam width is the beam width of the beam currently used by the terminal. The beam currently used by the terminal may be the first receiving beam or the sending beam used to send a message to the access network device.

In the first possible design, referring to Figure 8, after the terminal executes S2021, executes S2022:

S2022. When the target width is less than or equal to the preset beam width, the terminal adjusts the beam width of the first receiving beam from the first width to the target width.

Among them, the target width is the second width.

Here, since the beam currently used by the terminal can perform normal data interaction with the access network equipment, if the beam width of the first receiving beam is equal to the preset beam width, the terminal uses the first receiving beam with the same beam width, and the same can be done. Perform normal data interaction with access network equipment. Since the beam width is smaller, the corresponding beam gain is larger, and the reachable distance of the beam is larger. If the beam width of the first receiving beam is smaller than the preset beam width, the terminal uses the first receiving beam with a smaller beam width , Can still carry out normal data interaction with the access network equipment.

In the second possible design, referring to Figure 9, after the terminal executes S2021, executes S2023:

S2023. When the target width is greater than the preset beam width, and the reference signal received power corresponding to the target width is greater than or equal to the preset power value, the terminal adjusts the beam width of the first receive beam from the first width to the target width, and the target width is The second width.

The preset power value may be configured by the access network device, and specifically may be a synchronization signal block (synchronization signal block, SSB) received power threshold. For example, the access network device sends radio resource control (Radio Resource Control, RRC) signaling to the terminal, and the RRC signaling carries the SSB received power threshold. The SSB received power threshold is the lowest beam power that guarantees the normal communication between the terminal and the access network device. If the reference signal received power of the first received beam is lower than the SSB received power threshold, the terminal and the access network device cannot exchange information .

Among them, there are many ways to calculate the received power of the reference signal. As a possible implementation manner, the terminal determines the reference signal received power based on a preset conversion relationship. The preset conversion relationship is related to the conversion relationship between the beam width and the beam gain. The preset conversion relationship is related to device design. If the device design is determined, the preset conversion relationship between beam gain and beam width is also determined accordingly. The terminal can obtain the beam width (BeamWidth_current) and the reference signal received power (RSRP_current) of the currently used beam, combined with the preset conversion relationship (F), to obtain the reference signal received power corresponding to the target width (BeamWidth_optimal) ( RSRP_optimal).

In this way, when the target width is greater than the preset beam width, the terminal may then determine whether the reference signal received power corresponding to the target width is greater than the SSB received power threshold. When the reference signal receiving power corresponding to the target width is greater than the SSB receiving power threshold, it means that the beam corresponding to the target width can ensure the communication between the terminal and the access network device, and the beam width of the first receiving beam is adjusted to After the target width, normal communication between the terminal and the access network device can also be guaranteed.

In the third possible design, referring to Figure 10, after the terminal executes S2021, S2024 and S2025 are executed:

S2024: When the target width is greater than the preset beam width, and the reference signal received power corresponding to the target width is less than the preset power value, the terminal determines the beam width set.

Wherein, the beam width set includes at least one candidate beam width, each candidate beam width corresponds to one reference signal received power, and each candidate beam width is smaller than the target width. The beam width difference of each candidate beam can be the same or different.

Exemplarily, the width value of the target width is 10°, the beam width set includes three candidate beam widths, and the three candidate beam widths are respectively: 9°, 8°, and 7°. The reference signal received power corresponding to the candidate beamwidth of "9°" is recorded as RSRP1, the reference signal received power corresponding to the candidate beamwidth of "8°" is recorded as RSRP2, and the candidate beamwidth of "7°" is recorded as RSRP1. The corresponding reference signal received power is recorded as RSRP3.

S2025. The terminal adjusts the beam width of the first receiving beam from the first width to the first candidate beam width.

Among them, the first candidate beam width is the second width, the first candidate beam width belongs to the beam width set, the difference between the first candidate beam width and the target width is the smallest, and the reference signal received power corresponding to the first candidate beam width is greater than or Equal to the preset power value.

Exemplarily, the terminal compares the reference signal received power corresponding to the three candidate beamwidths with the SSB received power threshold, and the comparison result is: RSRP1 is less than the SSB received power threshold, RSRP2 is greater than the SSB received power threshold, and RSRP3 is greater than the SSB received power threshold . The candidate beam width corresponding to RSRP2 is 8°, and the candidate beam width corresponding to RSRP3 is 7°. Because the difference between the candidate beam width corresponding to RSRP2 and the target width is greater than the candidate beam width corresponding to RSRP3 and the target width The difference between is small. Therefore, the candidate beam width of "8°" is the first candidate beam width, that is, the second width.

Exemplarily, the terminal may construct the beam width set in the following manner: the terminal uses the target width as a reference and determines the first candidate beam width according to a certain beam width interval. For example, the first candidate beamwidth is the difference between the width value of the target width and the beamwidth interval. The terminal calculates the beam gain corresponding to the first candidate beam width. Because the beam gain is a parameter after the reference signal received power is normalized. The terminal determines the reference signal received power of the first candidate beamwidth according to the beam gain of the first candidate beamwidth. If the reference signal received power corresponding to the first candidate beamwidth is greater than or equal to the SSB received power threshold, the beamwidth set construction process ends. If the reference signal received power corresponding to the first candidate beamwidth is less than the SSB received power threshold, the terminal uses the first candidate beamwidth as a reference and determines the second candidate beamwidth according to the aforementioned beamwidth interval. For example, the second candidate beamwidth is the difference between the width value of the first candidate beamwidth and the beamwidth interval. The terminal determines the reference signal received power corresponding to the second candidate beamwidth based on the second candidate beamwidth. This loop continues until the reference signal received power corresponding to a certain candidate beamwidth is greater than or equal to the SSB received power threshold, and the beamwidth set construction process ends. At this time, the terminal can also determine the first candidate beamwidth. Or, the broadband value of the candidate beam width is equal to the preset beam width, and the beam width set construction process ends.

In this way, when the target width is greater than the preset beam width, and the reference signal received power corresponding to the target width is less than or equal to the SSB received power threshold, it means that the beam corresponding to the target width cannot guarantee the connection between the terminal and the access network device. Communication, the terminal determines the beam width set based on the target width, and selects the first candidate beam width with the smallest difference from the target width and with the reference signal received power greater than or equal to the preset power value as the second width, so as to compare the first received beam The adjustment of the beam width can not only ensure the normal communication between the terminal and the access network equipment, but also avoid the problem of inter-beam interference caused by the excessive beam width.

In the communication method provided by the embodiment of the present application, the terminal receives the first beam from the access network device through the first receiving beam, and then adjusts the beam width of the first receiving beam from the first width to the first beam according to the arrival angle power spectrum of the first beam The second width. Wherein, the beam width of the first receiving beam is the first width. Compared with the prior art, the beam width of the first receiving beam is fixed, and flexible configuration of the beam width cannot be realized. The communication method provided by the embodiments of the present application can flexibly adjust the beam width of the first receiving beam based on the arrival angle power spectrum of the first beam, enhance the flexibility and robustness of the beam width adjustment, and can avoid the bandwidth caused by excessive beam width. The problems of high energy consumption and mutual interference between beams can also avoid the problem of instability of the wireless link caused by the narrow beam, and improve the stability of the wireless link. Since the beam width of the first receiving beam can be dynamically adjusted and is in an optimal width state, the energy utilization rate and the stability of the wireless link are improved, and the communication quality is ensured.

Next, referring to FIG. 11, the following line transmission scenario is taken as an example to describe the communication method provided in the embodiment of the present application:

S1100. The terminal receives the first beam from the access network device through the first receiving beam.

For the specific steps of the terminal performing S1100, refer to S201, which will not be repeated here.

S1101. The terminal obtains the angle of arrival power spectrum of the first beam.

Exemplarily, the terminal uses a channel estimation algorithm to obtain the angle of arrival power spectrum of the first beam.

S1102. The terminal calculates the angular spread of the first beam.

For the specific steps of the terminal performing S1102, refer to S20211, which will not be repeated here.

S1103. The terminal calculates the moving speed according to the Doppler frequency offset.

Exemplarily, at time ti, the terminal obtains the Doppler frequency offset f _d,ti based on the phase tracking reference signal, and obtains the moving speed according to formula (3).

S1104: The terminal obtains the rotation speed through the gyroscope.

S1105. The terminal determines the degree of interference of the first beam according to the reference signal received power and the signal-to-noise ratio of the first beam.

For the specific steps for the terminal to perform S1105, please refer to the related description of "The adjustment coefficient may also be determined according to the interference degree of the first beam", which will not be repeated here.

S1106. The terminal determines the target width (BeamWidth_optimal) according to the angle expansion and adjustment coefficient of the first beam.

Wherein, the adjustment coefficient is determined according to the moving speed, rotating speed of the terminal and the interference degree of the first beam.

Among them, the specific steps for the terminal to execute S1106 can refer to S20213, which will not be repeated here.

S1107. The terminal judges whether the target width (BeamWidth_optimal) is less than or equal to the beam width (BeamWidth_current) of the currently used beam:

If yes, execute S1110, if not, execute S1108.

S1108. The terminal calculates the reference signal received power (RSRP_optimal) corresponding to the target width (BeamWidth_optimal).

For the specific steps for the terminal to perform S1108, please refer to the relevant description of "Method for Calculating Reference Signal Received Power in S2023", which will not be repeated here.

S1109. The terminal judges whether the reference signal received power (RSRP_optimal) corresponding to the target width (BeamWidth_optimal) is greater than or equal to the SSB received power threshold:

If yes, execute S1110, if not, execute S1111.

S1110. The terminal determines that the target width (BeamWidth_optimal) is the second width.

S1111. The terminal determines that the first candidate beam width is the second width. Wherein, the first candidate beam width has the smallest difference from the target width, and the reference signal received power corresponding to the first candidate beam width is greater than or equal to the SSB received power threshold.

For the specific steps for the terminal to execute S1111, refer to S2024 and S2025, which will not be repeated here.

S1112. The terminal determines the beam width mode corresponding to the second width.

Among them, each beam width mode corresponds to a beam width angle, as shown in Table 3. In Table 3, the beam width corresponding to the "narrow" beam width mode is: 2 degrees. The beam width corresponding to the “wide” beam width mode is 15 degrees.

table 3

Beamwidth mode	Beam width
narrow	2 degrees
Narrower	5 degrees
width	15 degrees
Wider	30 degrees
Very wide	40 degree

The terminal selects the beam width mode according to the angle of the second width and the beam width corresponding to the beam width mode. For example, the second width is 14 degrees. According to Table 3, the beam width closest to 14 degrees is 15 degrees. At this time, the terminal determines that the beam width mode corresponding to the second width is wide.

S1113. The terminal adopts the beam width mode corresponding to the second width to adjust the beam width of the first receiving beam.

In this way, the terminal determines the optimal beam width of the first receiving beam according to the power spectrum of the arrival angle of the first beam, its own motion state and the interference degree of the first beam. Since the beam width of the first receiving beam can be dynamically adjusted, In the state of optimal width, it can not only prevent the problems of high energy consumption and mutual interference between beams caused by excessive beam width, but also prevent the instability of wireless links caused by narrow beams, and improve In order to improve the stability of the wireless link, the flexibility and robustness of beamwidth adjustment can also be enhanced.

The foregoing mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between different network elements. It can be understood that, in order to implement the above-mentioned functions, the terminal includes hardware structures and/or software modules corresponding to each function. In combination with the units and algorithm steps of the examples described in the embodiments disclosed in the present application, the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Those skilled in the art can use different methods for each specific application to implement the described functions, but such implementation should not be considered as going beyond the scope of the technical solutions of the embodiments of the present application.

The embodiment of the present application may divide the communication device into functional units according to the foregoing method examples. For example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

Fig. 12 shows a schematic block diagram of a communication device provided in an embodiment of the present application. The communication device 1200 may exist in the form of software, and may also be a device, or a component (such as a chip system) in the device. The communication device 1200 includes a storage unit 1201, a processing unit 1202, and a communication unit 1203.

The communication unit 1203 can also be divided into a sending unit (not shown in FIG. 12) and a receiving unit (not shown in FIG. 12). The sending unit is used to support the communication device 1200 to send information to other network elements. The receiving unit is used to support the communication device 1200 to receive information from other network elements.

The storage unit 1201 is used to store the program code and data of the device 1200, and the data may include but is not limited to raw data or intermediate data.

When the communication device is used as a terminal, the communication unit 1203 is configured to receive the first beam from the access network device through the first receiving beam, and the beam width of the first receiving beam is the first width. The processing unit 1202 is configured to adjust the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam.

In a possible design, the processing unit 1202 is configured to adjust the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam, including: The power spectrum of the arrival angle determines the target width;

It is used to adjust the beam width of the first receiving beam from the first width to the target width when the target width is less than or equal to the preset beam width, and the target width is the second width.

In a possible design, the processing unit 1202 is configured to adjust the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam, including: The power spectrum of the arrival angle determines the target width;

When the target width is greater than the preset beam width, and the reference signal received power corresponding to the target width is greater than or equal to the preset power value, adjust the beam width of the first receive beam from the first width to the target width, and the target width is the first Two width.

In a possible design, the processing unit 1202 is configured to adjust the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam, including: for the terminal according to the first beam The power spectrum of the arrival angle of the wave determines the target width;

Used to determine the beam width set when the target width is greater than the preset beam width and the reference signal received power corresponding to the target width is less than the preset power value. The beam width set includes at least one candidate beam width, and each candidate beam width corresponds to a reference Signal received power, and each candidate beam width is smaller than the target width;

Used to adjust the beam width of the first receiving beam from the first width to the first candidate beam width, the first candidate beam width is the second width, the first candidate beam width belongs to the beam width set, and the first candidate beam width is the target width The difference between is the smallest, and the reference signal received power corresponding to the first candidate beamwidth is greater than or equal to the preset power value.

In a possible design, the processing unit 1202 is configured to determine the target width according to the angle of arrival power spectrum of the first beam, including: determining the angle expansion of the first beam according to the angle of arrival power spectrum of the first beam. Expand to the target width;

or,

It is used to determine the target width according to the adjustment coefficient and the angle expansion of the first beam, where the adjustment coefficient is determined according to the motion state of the communication device and/or the interference degree of the first beam, and the interference degree of the first beam is the same as that of the first beam. The reference signal received power and/or signal-to-noise ratio.

In a possible design, the motion state includes the moving speed of the communication device and/or the rotation speed of the communication device.

In a possible design, the processing unit 1202 is further configured to: obtain the reference signal received power and signal-to-noise ratio of the first beam; and determine the interference degree of the first beam according to the reference signal received power and the signal-to-noise ratio of the first beam .

In a possible design, the movement state includes a first movement state and a second movement state, the movement speed of the first movement state is greater than the movement speed of the second movement state, and the interference degree of the first beam includes the first interference degree and the second movement state. The second degree of interference, the first degree of interference is higher than the second degree of interference, the processing unit 1202 is used to determine the adjustment coefficient according to its own motion state and the interference degree of the first beam, including: when the motion state of the communication device is the first In a mobile state, and the interference degree of the first beam is the first interference degree, determining the adjustment coefficient to be the first value;

When the motion state of the communication device is the second motion state, and the interference degree of the first beam is the first interference degree, determine that the adjustment coefficient is a second value, and the second value is less than the first value;

When the motion state of the communication device is the first motion state and the interference degree of the first beam is the second interference degree, determine that the adjustment coefficient is a third value, and the third value is less than the first value;

Used for determining that the adjustment coefficient is a fourth value when the movement state of the communication device is the second movement state and the interference degree of the first beam is the second interference degree, and the fourth value is greater than the second value and less than the third value;

Or, the adjustment factor is a preset value.

The processing unit 1202 may be a processor or a controller, for example, a CPU, a general-purpose processor, DSP, ASIC, FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination of computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on.

The communication unit 1203 may be a communication interface, a transceiver, or a transceiving circuit, etc., where the communication interface is a general term. In a specific implementation, the communication interface may include multiple interfaces, for example, the interface between the terminal and the terminal and/ Or other interfaces.

The storage unit 1201 may be a memory.

When the processing unit 1202 is a processor, the communication unit 1203 is a communication interface, and the storage unit 1201 is a memory, the communication device 1300 involved in the embodiment of the present application may be as shown in FIG. 13.

Referring to FIG. 13, the device 1300 includes: a processor 1302, a transceiver 1303, and a memory 1301.

The transceiver 1303 may be an independently set transmitter, which may be used to send information to other devices, and the transceiver may also be an independently set receiver, which is used to receive information from other devices. The transceiver may also be a component that integrates the functions of sending and receiving information. The embodiment of the present application does not limit the specific implementation of the transceiver.

Optionally, the apparatus 1300 may further include a bus 1304. Among them, the transceiver 1303, the processor 1302, and the memory 1301 can be connected to each other through a bus 1304; the bus 1304 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (Extended Industry Standard Architecture, abbreviated as PCI). EISA) bus, etc. The bus 1304 can be divided into an address bus, a data bus, a control bus, and so on. For ease of presentation, only one thick line is used in FIG. 13, but it does not mean that there is only one bus or one type of bus.

A person of ordinary skill in the art can understand that: in the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (for example, coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital video disc (Digital Video Disc, DVD)), or a semiconductor medium (for example, a solid state disk (Solid State Disk, SSD)) )Wait.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.

The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network devices (for example, Terminal). Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each functional unit may exist independently, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware, or may be implemented in the form of hardware plus software functional units.

Through the description of the above implementation manners, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general hardware. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation. . Based on this understanding, the technical solution of this application essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a computer floppy disk. , A hard disk or an optical disk, etc., include a number of instructions to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in each embodiment of the present application.

The above are only specific implementations of this application, but the protection scope of this application is not limited to this, and changes or substitutions within the technical scope disclosed in this application should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims (18)

1. A communication method, characterized in that it comprises:

   The terminal receives the first beam from the access network device through the first receiving beam, and the beam width of the first receiving beam is the first width;

   The terminal adjusts the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam.
2. The communication method according to claim 1, wherein the terminal adjusts the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam. include:

   Determining, by the terminal, the target width according to the arrival angle power spectrum of the first beam;

   When the target width is less than or equal to the preset beam width, the terminal adjusts the beam width of the first receiving beam from the first width to the target width, and the target width is the second width.
3. The communication method according to claim 1, wherein the terminal adjusts the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam. include:

   Determining, by the terminal, the target width according to the arrival angle power spectrum of the first beam;

   When the target width is greater than the preset beam width, and the reference signal received power corresponding to the target width is greater than or equal to the preset power value, the terminal changes the beam width of the first receive beam from the first width Adjusted to the target width, and the target width is the second width.
4. The communication method according to claim 1, wherein the terminal adjusts the beam width of the first receiving beam from the first width to the second width according to the arrival angle power spectrum of the first beam. include:

   Determining, by the terminal, the target width according to the arrival angle power spectrum of the first beam;

   When the target width is greater than the preset beam width, and the reference signal received power corresponding to the target width is less than the preset power value, the terminal determines a beam width set, and the beam width set includes at least one candidate beam width , Each candidate beam width corresponds to a reference signal received power, and each candidate beam width is smaller than the target width;

   The terminal adjusts the beam width of the first receive beam from the first width to a first candidate beam width, the first candidate beam width is a second width, and the first candidate beam width belongs to the beam Width set, the difference between the first candidate beam width and the target width is the smallest, and the reference signal received power corresponding to the first candidate beam width is greater than or equal to the preset power value.
5. The communication method according to any one of claims 2 to 4, wherein the terminal determining the target width according to the angle of arrival power spectrum of the first beam specifically includes:

   Determining, by the terminal, the angular expansion of the first beam according to the arrival angle power spectrum of the first beam, where the angular expansion is a target width;

   or,

   The terminal determines the target width according to the adjustment coefficient and the angle expansion of the first beam, wherein the adjustment coefficient is determined according to the motion state of the terminal and/or the interference degree of the first beam, and The degree of interference of the first beam is associated with the reference signal received power and/or signal-to-noise ratio of the first beam.
6. The communication method according to claim 5, wherein the motion state includes a moving speed of the terminal and/or a rotation speed of the terminal.
7. The communication method according to claim 5, wherein the method further comprises:

   Acquiring, by the terminal, the reference signal received power and the signal-to-noise ratio of the first beam;

   The terminal determines the degree of interference of the first beam according to the reference signal received power of the first beam and the signal-to-noise ratio.
8. The communication method according to claim 5 or 6, wherein the movement state includes a first movement state and a second movement state, and the movement speed of the first movement state is greater than the movement speed of the second movement state The degree of interference of the first beam includes a first degree of interference and a second degree of interference, the first degree of interference is higher than the second degree of interference, and the terminal is based on its own motion state and the The degree of interference, determine the adjustment coefficient, specifically include:

   When the movement state of the terminal is the first movement state, and the interference degree of the first beam is the first interference degree, the terminal determines that the adjustment coefficient is the first value;

   When the motion state of the terminal is the second mobile state, and the interference degree of the first beam is the first interference degree, the terminal determines that the adjustment coefficient is a second value, and the second value is less than the first value. Numerical value

   When the movement state of the terminal is the first movement state and the interference degree of the first beam is the second interference degree, the terminal determines that the adjustment coefficient is a third value, and the third value is less than the first value. Numerical value

   When the movement state of the terminal is the second movement state, and the interference degree of the first beam is the second interference degree, the terminal determines that the adjustment coefficient is a fourth value, and the fourth value is greater than the second Numerical value, and less than the third numerical value;

   or,

   The adjustment coefficient is a preset value.
9. A communication device, characterized by comprising:

   A receiver, configured to receive a first beam from an access network device through a first receiving beam, and the beam width of the first receiving beam is a first width;

   The processor is configured to adjust the beam width of the first receiving beam from the first width to a second width according to the arrival angle power spectrum of the first beam.
10. The communication device according to claim 9, wherein the processor is configured to adjust the beam width of the first receiving beam from the first width to the first width according to the arrival angle power spectrum of the first beam. 2. Width, including: determining the target width according to the arrival angle power spectrum of the first beam;

    It is used for adjusting the beam width of the first receiving beam from the first width to the target width when the target width is less than or equal to the preset beam width, and the target width is the second width.
11. The communication device according to claim 9, wherein the processor is configured to adjust the beam width of the first receiving beam from the first width to the first width according to the arrival angle power spectrum of the first beam. 2. Width, including: determining the target width according to the arrival angle power spectrum of the first beam;

    When the target width is greater than the preset beam width, and the reference signal received power corresponding to the target width is greater than or equal to the preset power value, adjust the beam width of the first receive beam from the first width Is the target width, and the target width is the second width.
12. The communication device according to claim 9, wherein the processor is configured to adjust the beam width of the first receiving beam from the first width to the first width according to the arrival angle power spectrum of the first beam. 2. Width, including: determining the target width according to the arrival angle power spectrum of the first beam;

    When the target width is greater than the preset beam width and the reference signal received power corresponding to the target width is less than the preset power value, determining a beam width set, where the beam width set includes at least one candidate beam width, Each candidate beam width corresponds to a reference signal received power, and each candidate beam width is smaller than the target width;

    Used for adjusting the beam width of the first receiving beam from the first width to a first candidate beam width, the first candidate beam width being a second width, and the first candidate beam width belonging to the beam width Set, the difference between the first candidate beam width and the target width is the smallest, and the reference signal received power corresponding to the first candidate beam width is greater than or equal to the preset power value.
13. The communication device according to any one of claims 10 to 12, wherein the processor is configured to determine the target width according to the angle of arrival power spectrum of the first beam, comprising: The arrival angle power spectrum of the first beam determines the angular expansion of the first beam, and the angular expansion is the target width;

    or,

    For determining the target width according to the adjustment coefficient and the angle expansion of the first beam, wherein the adjustment coefficient is determined according to the motion state of the communication device and/or the interference degree of the first beam, the The degree of interference of the first beam is associated with the reference signal received power and/or signal-to-noise ratio of the first beam.
14. The communication device according to claim 13, wherein the motion state includes a moving speed of the communication device and/or a rotation speed of the communication device.
15. The communication device according to claim 13, wherein the processor is further configured to: obtain the reference signal received power and the signal-to-noise ratio of the first beam; according to the reference signal received power and the signal to noise ratio of the first beam The signal-to-noise ratio determines the degree of interference of the first beam.
16. The communication device according to claim 13 or 14, wherein the movement state includes a first movement state and a second movement state, and the movement speed of the first movement state is greater than the movement speed of the second movement state , The degree of interference of the first beam includes a first degree of interference and a second degree of interference, the first degree of interference is higher than the second degree of interference, and the processor is configured to perform according to its own motion state and the The degree of interference of the first beam and determining the adjustment coefficient include: when the motion state of the communication device is the first movement state, and the degree of interference of the first beam is the first degree of interference, determining the adjustment coefficient is the first degree of interference A value

    When the motion state of the communication device is the second mobile state and the interference degree of the first beam is the first interference degree, determine that the adjustment coefficient is a second value, and the second value is smaller than the first Numerical value

    When the motion state of the communication device is the first mobile state and the interference degree of the first beam is the second interference degree, determine that the adjustment coefficient is a third value, the third value being smaller than the first Numerical value

    When the motion state of the communication device is the second mobile state, and the interference degree of the first beam is the second interference degree, determine that the adjustment coefficient is a fourth value, and the fourth value is greater than the second Numerical value, and less than the third numerical value;

    Alternatively, the adjustment coefficient is a preset value.
17. A chip, characterized by comprising: a processor, the processor is coupled with a memory, the memory stores program instructions, and when the program instructions stored in the memory are executed by the processor, as in claims 1 to The communication method described in any one of 8 is implemented.
18. A readable storage medium, characterized by comprising a program or instruction, and when the program or instruction is executed, the communication method according to any one of claims 1 to 8 is realized.

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