CN113518468A

CN113518468A - Method and apparatus for determining a configuration

Info

Publication number: CN113518468A
Application number: CN202010693980.3A
Authority: CN
Inventors: 熊琦; 孙霏菲; 王轶; 喻斌
Original assignee: Samsung Electronics Co Ltd
Current assignee: Beijing Samsung Telecom R&D Center; Samsung Electronics Co Ltd
Priority date: 2020-04-09
Filing date: 2020-07-17
Publication date: 2021-10-19

Abstract

The present disclosure provides a method and apparatus for determining a configuration. By the method provided by the disclosure, the User Equipment (UE) can determine the reference points of the starting positions of different random access response windows according to different sending conditions of the messages for random access; by the method provided by the disclosure, effective PUSCH opportunity (valid PUSCH occasion) in two-step random access can be protected; and by the method provided by the present disclosure, how to determine the transmitted uplink signal can be processed in the case that the transmission of the message for random access overlaps with other uplink signals, is in the same time unit or is close to each other.

Description

Method and apparatus for determining a configuration

Technical Field

The present disclosure relates to the field of wireless communications, and more particularly, to methods and apparatus for determining a configuration.

Background

In order to meet the increasing demand for wireless data communication services since the deployment of 4G communication systems, efforts have been made to develop improved 5G or quasi-5G communication systems. Accordingly, the 5G or quasi-5G communication system is also referred to as a "super 4G network" or a "post-LTE system".

The 5G communication system is implemented in a higher frequency (millimeter wave) band, for example, a 60GHz band, to achieve a higher data rate. In order to reduce propagation loss of radio waves and increase transmission distance, beamforming, massive Multiple Input Multiple Output (MIMO), full-dimensional MIMO (FD-MIMO), array antenna, analog beamforming, massive antenna technology are discussed in the 5G communication system.

Further, in the 5G communication system, development of improvement of the system network is ongoing based on advanced small cells, cloud Radio Access Network (RAN), ultra dense network, device-to-device (D2D) communication, wireless backhaul, mobile network, cooperative communication, coordinated multipoint (CoMP), reception side interference cancellation, and the like.

In 5G systems, hybrid FSK and QAM modulation (FQAM) and Sliding Window Superposition Coding (SWSC) have been developed as Advanced Coding Modulation (ACM), and filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA), and Sparse Code Multiple Access (SCMA) as advanced access techniques.

Disclosure of Invention

Aspects of the present disclosure are to address at least the above problems and/or disadvantages and to provide at least the advantages described below. Accordingly, aspects of the present disclosure provide methods and apparatus for determining a configuration. According to aspects of the present disclosure, a User Equipment (UE) may be caused to determine different Random Access Response (RAR) windows for different transmission cases of a message for random access.

According to an aspect of the disclosure, a method for random access of a User Equipment (UE) comprises: obtaining effective random access resources and data resources based on the configuration information; sending a message for random access by using the effective random access resource and data resource; and detecting feedback in a random access response window determined according to a transmission situation of a message for random access, wherein the message for random access includes a random access signal and a data part signal.

According to an aspect of the disclosure, obtaining the valid random access resource and data resource based on the configuration information includes: determining random access resources and data resources configured for random access based on the configuration information; carrying out validity detection on the determined random access resources and data resources to obtain valid random access resources and data resources; mapping the effective random access resources and the effective data resources in a period; and obtaining effective Physical Uplink Shared Channel (PUSCH) resources based on the mapping result.

According to an aspect of the disclosure, further comprising performing at least one of the following for the OFDM symbols or symbol groups occupied by the valid PUSCH time-frequency resources and/or the Ngap OFDM symbols or symbol groups preceding the valid PUSCH time-frequency resources: the UE does not receive a Physical Downlink Control Channel (PDCCH), a Physical Downlink Shared Channel (PDSCH) or a channel state information reference signal (CSI-RS) on the time slot where the symbol or the symbol group is located; the UE does not expect the received time division uplink and downlink common configuration or time division uplink and downlink independent configuration to configure the symbols or the symbol groups into downlink and/or flexibility; and the symbol or the symbol group is indicated as downlink and/or flexible by the value of the slot format indication index carried by the downlink control information format 2_0 which the UE does not expect to receive, wherein the Ngap is the number of the symbols defined in advance.

According to an aspect of the present disclosure, there is further included, in a case where there is transmission of a further uplink signal while transmitting the uplink signal related to the message for random access, if the uplink signal related to the message for random access and the further uplink signal satisfy a predetermined overlap condition, performing at least one of: transmitting an uplink signal related to a message for random access; transmitting the additional uplink signal; transmitting the signal that occurred previously; and autonomously selecting one of the uplink signal related to the message for random access and the further uplink signal for transmission.

According to an aspect of the present disclosure, the uplink signal related to the message for random access includes at least one of: a message for random access; a random access signal for a message for random access; a data part signal of a message for random access; and message 1 of four-step random access.

According to an aspect of the disclosure, the further uplink signal comprises at least one of: an uplink control channel PUCCH signal; an uplink shared channel, PUSCH, signal; sounding reference signals, SRS; and an uplink signal having a timing advance adjustment value different from a signal related to a message for random access.

According to an aspect of the disclosure, the predetermined overlap condition comprises at least one of: transmission opportunities for a signal related to a message for random access and the further uplink signal partially or fully overlap in time and/or frequency domain; the signal related to the message for random access and the further uplink signal are in the same time slot; and the signal related to the message for random access and the further uplink signal are both not in the same time slot, but the interval between the last OFDM symbol of one of the two in the previous time slot and the first OFDM symbol of the other of the two in the subsequent time slot is smaller than and/or equal to a threshold value, wherein the time slot is determined by the signal related to the message for random access and the further uplink signal or by the subcarrier spacing of the frequency band part BWP in which it is located, and wherein the specific threshold value is configured or predefined by the network.

According to an aspect of the present disclosure, further comprising: if the signal related to the message for random access is not transmitted and is a random access signal of the message for random access, a data part signal of the corresponding message for random access is not transmitted.

According to an aspect of the present disclosure, further comprising: the random access signal of the message for random access and the data part signal of the message for random access are given different priorities.

According to an aspect of the present disclosure, determining a random access response window according to a transmission situation of a message for random access includes:

if a random access signal of the message for random access and a data part signal of the message for random access are transmitted, or only the random access signal of the message for random access is transmitted but there is an effective PUSCH time-frequency resource for the data part signal of the message for random access, the random access response window starts from a first OFDM symbol of an earliest control resource set in a first type downlink control channel common search space set configured to the UE after adding one OFDM symbol from an end position of a corresponding PUSCH time-frequency resource unit; and if only random access signals of the message for random access are transmitted and no effective PUSCH time-frequency resource exists for data part signals of the message for random access, starting from the first OFDM symbol of the earliest control resource set in the first type downlink control channel common search space set configured to the UE after adding at least one OFDM symbol from the end position of the corresponding PRACH time-frequency resource, wherein the length of the OFDM symbol is determined by the subcarrier spacing of the first type downlink control channel common search space set.

According to an aspect of the disclosure, the length of the random access response window is a number of time slots multiplied by a length of the time slots, where the length of the time slots is determined by a subcarrier spacing of the first type downlink control channel common search space set, and where the number of the time slots is indicated by a feedback window of the configured feedback message.

According to an aspect of the present disclosure, only the random access signal of the message for random access is transmitted but there is an effective PUSCH time-frequency resource for the data part signal of the message for random access further including the data part signal of the message not used for random access due to at least one of: due to power allocation for PUSCH/PUCCH/PRACH/SRS transmissions; due to power allocation in double-stranded DC; since the UE does not detect the downlink control information format 2_0 providing the slot format; as the UE detects that the downlink control information format 2_0 providing the slot format indicates that the PUSCH occupies a flexible or downlink symbol; due to the operation of determining the slot format; and due to overlap with high priority upstream signals.

According to an aspect of the present disclosure, a User Equipment (UE) for random access, includes: a transceiver to receive a signal from a base station and to transmit a signal to the base station; a memory storing executable instructions; and a processor executing the stored instructions to perform the aforementioned method.

Drawings

The above and other objects, features and advantages of the present disclosure will become more apparent from the following description of embodiments of the present disclosure with reference to the accompanying drawings, in which:

fig. 1 illustrates an example wireless network 100 in accordance with various embodiments of the present disclosure;

fig. 2a illustrates an example wireless transmission path according to the present disclosure;

fig. 2b illustrates an example wireless receive path according to this disclosure;

fig. 3a illustrates an example UE 116 according to the present disclosure;

fig. 3b illustrates an example gNB 102 according to the present disclosure;

fig. 4 illustrates a contention-based random access procedure according to an example of the present disclosure;

fig. 5 illustrates a random access procedure according to another example of the present disclosure;

fig. 6 shows an example of PUSCH resource determination according to an embodiment of the present disclosure;

FIG. 7 illustrates an example of how to determine a reference point for a message B detection window start position in accordance with this disclosure; and

fig. 8 is a block diagram illustrating a UE according to an embodiment of the present disclosure.

Detailed Description

The text and drawings are provided as examples only to assist the reader in understanding the disclosure. They are not intended, nor should they be construed, as limiting the scope of the disclosure in any way. While certain embodiments and examples have been provided, it will be apparent to those skilled in the art, based on the disclosure herein, that changes can be made in the embodiments and examples shown without departing from the scope of the disclosure.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As will be appreciated by those skilled in the art, a "terminal" as used herein includes both devices having a wireless signal receiver, which are devices having only a wireless signal receiver without transmit capability, and devices having receive and transmit hardware, which have devices having receive and transmit hardware capable of two-way communication over a two-way communication link. Such a device may include: a cellular or other communication device having a single line display or a multi-line display or a cellular or other communication device without a multi-line display; personal Communications Systems (PCS), which may combine voice, data processing, facsimile and/or data Communications capabilities; a PDA (Personal Digital Assistant), which may include a radio frequency receiver, a pager, internet/intranet access, web browser, notepad, calendar and/or Global Positioning System (GPS) receiver; a conventional laptop and/or palmtop computer or other device having and/or including a radio frequency receiver. As used herein, a "terminal" or "terminal device" may be portable, transportable, installed in a vehicle (aeronautical, maritime, and/or land-based), or situated and/or configured to operate locally and/or in a distributed fashion at any other location(s) on earth and/or in space. As used herein, a "terminal Device" may also be a communication terminal, a web terminal, a music/video playing terminal, such as a PDA, a Mobile Internet Device (MID) and/or a Mobile phone with music/video playing function, or a smart tv, a set-top box, etc.

Those skilled in the art will appreciate that a "base station" (BS) or "network device," as used herein, may refer to an eNB, eNodeB, NodeB, or Base Transceiver Station (BTS), or gNB, etc., depending on the technology and terminology used.

Those skilled in the art will appreciate that the "memory" used herein may be of any type suitable to the technical environment herein, and may be implemented using any suitable data storage technology, including, without limitation, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory.

Those skilled in the art will appreciate that a "processor," as used herein, may be of any type suitable to the technical environment herein, including without limitation one or more of the following: general purpose computers, special purpose computers, microprocessors, digital signal processors, DSPs, and processors based on a multi-core processor architecture.

The time domain units (also called time units) in this disclosure may be: one OFDM symbol, one OFDM symbol group (composed of a plurality of OFDM symbols), one slot group (composed of a plurality of slots), one subframe group (composed of a plurality of subframes), one system frame group (composed of a plurality of system frames); absolute time units are also possible, such as 1 millisecond, 1 second, etc.; the time unit may also be a combination of multiple granularities, e.g., N1 slots plus N2 OFDM symbols.

The frequency domain units in this disclosure may be: one subcarrier, one subcarrier group (consisting of a plurality of subcarriers), one Resource Block (RB) (which may also be referred to as a Physical Resource Block (PRB)), one resource block group (consisting of a plurality of RBs), one band part (BWP), one band part group (consisting of a plurality of BWPs), one band/carrier, one band group/carrier group; or absolute frequency domain units such as 1 Hz, 1 kHz, etc.; the frequency domain elements may also be a combination of multiple granularities, e.g., M1 PRBs plus M2 subcarriers.

Embodiments according to the present disclosure will be described in detail below with reference to the accompanying drawings.

Fig. 1 illustrates an example wireless network 100 in accordance with various embodiments of the present disclosure. The embodiment of the wireless network 100 shown in fig. 1 is for illustration only. Other embodiments of wireless network 100 can be used without departing from the scope of this disclosure.

Wireless network 100 includes a gandeb (gNB)101, a gNB 102, and a gNB 103. gNB 101 communicates with gNB 102 and gNB 103. The gNB 101 also communicates with at least one Internet Protocol (IP) network 130, such as the internet, a proprietary IP network, or other data network.

Depending on the network type, other well-known terms can be used instead of "gnnodeb" or "gNB", such as "base station" or "access point". For convenience, the terms "gNodeB" and "gNB" are used in this patent document to refer to network infrastructure components that provide wireless access for remote terminals. Also, other well-known terms, such as "mobile station", "subscriber station", "remote terminal", "wireless terminal", or "user equipment", can be used instead of "user equipment" or "UE", depending on the network type. For convenience, the terms "user equipment" and "UE" are used in this patent document to refer to a remote wireless device that wirelessly accesses the gNB, whether the UE is a mobile device (such as a mobile phone or smartphone) or what is commonly considered a stationary device (such as a desktop computer or vending machine).

gNB 102 provides wireless broadband access to network 130 for a first plurality of User Equipments (UEs) within coverage area 120 of gNB 102. The first plurality of UEs includes: a UE 111, which may be located in a Small Enterprise (SB); a UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi Hotspot (HS); a UE 114, which may be located in a first residence (R); a UE 115, which may be located in a second residence (R); the UE 116, may be a mobile device (M) such as a cellular phone, wireless laptop, wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs includes UE 115 and UE 116. In some embodiments, one or more of the gnbs 101-103 are capable of communicating with each other and with the UEs 111-116 using 5G, Long Term Evolution (LTE), LTE-A, WiMAX, or other advanced wireless communication technologies.

The dashed lines illustrate the approximate extent of

coverage areas

120 and 125, which are shown as approximately circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with the gNB, such as

coverage areas

120 and 125, can have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and artificial obstructions.

As described in more detail below, one or more of gNB 101, gNB 102, and gNB 103 include a 2D antenna array as described in embodiments of the present disclosure. In some embodiments, one or more of gNB 101, gNB 102, and gNB 103 support codebook design and structure for systems with 2D antenna arrays.

Although fig. 1 shows one example of a wireless network 100, various changes can be made to fig. 1. For example, wireless network 100 can include any number of gnbs and any number of UEs in any suitable arrangement. Also, the gNB 101 can communicate directly with any number of UEs and provide those UEs with wireless broadband access to the network 130. Similarly, each gNB 102-103 is capable of communicating directly with network 130 and providing UEs with direct wireless broadband access to network 130. Further, the

gnbs

101, 102, and/or 103 can provide access to other or additional external networks, such as external telephone networks or other types of data networks.

Fig. 2a illustrates an example wireless transmission path according to the present disclosure; and figure 2b illustrates an example wireless receive path according to the present disclosure; . In the following description, transmit path 200 can be described as being implemented in a gNB (such as gNB 102), -and receive path 250 can be described as being implemented in a UE (such as UE 116). However, it should be understood that the receive path 250 can be implemented in the gNB and the transmit path 200 can be implemented in the UE. In some embodiments, receive path 250 is configured to support codebook design and structure for systems with 2D antenna arrays as described in embodiments of the present disclosure.

The transmit path 200 includes a channel coding and modulation block 205, a serial-to-parallel (S-to-P) block 210, an N-point Inverse Fast Fourier Transform (IFFT) block 215, a parallel-to-serial (P-to-S) block 220, an add cyclic prefix block 225, and an up-converter (UC) 230. Receive path 250 includes a down-converter (DC)255, a remove cyclic prefix block 260, a serial-to-parallel (S-to-P) block 265, an N-point Fast Fourier Transform (FFT) block 270, a parallel-to-serial (P-to-S) block 275, and a channel decode and demodulation block 280.

In transmit path 200, a channel coding and modulation block 205 receives a set of information bits, applies coding, such as Low Density Parity Check (LDPC) coding, and modulates the input bits, such as with Quadrature Phase Shift Keying (QPSK) or Quadrature Amplitude Modulation (QAM), to generate a sequence of frequency domain modulation symbols. A serial-to-parallel (S-to-P) block 210 converts (such as demultiplexes) the serial modulation symbols into parallel data in order to generate N parallel symbol streams, where N is the number of IFFT/FFT points used in the gNB 102 and the UE 116. N-point IFFT block 215 performs IFFT operations on the N parallel symbol streams to generate a time-domain output signal. Parallel-to-serial block 220 converts (such as multiplexes) the parallel time-domain output symbols from N-point IFFT block 215 to generate a serial time-domain signal. Add cyclic prefix block 225 inserts a cyclic prefix into the time domain signal. Upconverter 230 modulates (such as upconverts) the output of add cyclic prefix block 225 to an RF frequency for transmission over a wireless channel. The signal can also be filtered at baseband before being converted to RF frequency.

The RF signal transmitted from the gNB 102 reaches the UE 116 after passing through the radio channel, and the reverse operation to that at the gNB 102 is performed at the UE 116. Downconverter 255 downconverts the received signal to baseband frequency and remove cyclic prefix block 260 removes the cyclic prefix to generate a serial time-domain baseband signal. Serial-to-parallel block 265 converts the time-domain baseband signal to parallel time-domain signals. The N-point FFT block 270 performs an FFT algorithm to generate N parallel frequency domain signals. The parallel-to-serial block 275 converts the parallel frequency domain signals to a sequence of modulated data symbols. Channel decode and demodulation block 280 demodulates and decodes the modulated symbols to recover the original input data stream.

Each of the gnbs 101-103 may implement a transmit path 200 similar to transmitting to the UE 111-116 in the downlink and may implement a receive path 250 similar to receiving from the UE 111-116 in the uplink. Similarly, each of UEs 111-116 may implement a transmit path 200 for transmitting in the uplink to gNB 101-103 and may implement a receive path 250 for receiving in the downlink from gNB 101-103.

Each of the components in fig. 2a and 2b can be implemented using hardware only, or using a combination of hardware and software/firmware. As a specific example, at least some of the components in fig. 2a and 2b may be implemented in software, while other components may be implemented in configurable hardware or a mixture of software and configurable hardware. For example, FFT block 270 and IFFT block 215 may be implemented as configurable software algorithms, where the value of the number of points N may be modified depending on the implementation.

Further, although described as using an FFT and IFFT, this is merely illustrative and should not be construed as limiting the scope of the disclosure. Other types of transforms can be used, such as Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) functions. It should be understood that the value of the variable N may be any integer (such as 1, 2, 3, 4, etc.) for DFT and IDFT functions, and any integer that is a power of 2 (such as 1, 2, 4, 8, 16, etc.) for FFT and IFFT functions.

Although fig. 2a and 2b show examples of wireless transmission and reception paths, various changes may be made to fig. 2a and 2 b. For example, the various components in fig. 2a and 2b can be combined, further subdivided, or omitted, and additional components can be added according to particular needs. Also, fig. 2a and 2b are intended to illustrate examples of the types of transmit and receive paths that can be used in a wireless network. Any other suitable architecture can be used to support wireless communications in a wireless network.

Fig. 3a illustrates an example UE 116 according to the present disclosure. The embodiment of the UE 116 shown in fig. 3a is for illustration only, and the

UE

111 and 115 of fig. 1 can have the same or similar configuration. However, UEs have a wide variety of configurations, and fig. 3a does not limit the scope of the present disclosure to any particular implementation of a UE.

The UE 116 includes an antenna 305, a Radio Frequency (RF) transceiver 310, Transmit (TX) processing circuitry 315, a microphone 320, and Receive (RX) processing circuitry 325. The UE 116 also includes a speaker 330, a processor/controller 340, an input/output (I/O) interface 345, input device(s) 350, a display 355, and a memory 360. Memory 360 includes an Operating System (OS)361 and one or more applications 362.

RF transceiver 310 receives incoming RF signals from antenna 305 that are transmitted by the gNB of wireless network 100. The RF transceiver 310 down-converts an incoming RF signal to generate an Intermediate Frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuitry 325, where RX processing circuitry 325 generates a processed baseband signal by filtering, decoding, and/or digitizing the baseband or IF signal. RX processing circuit 325 sends the processed baseband signals to speaker 330 (such as for voice data) or to processor/controller 340 (such as for web browsing data) for further processing.

TX processing circuitry 315 receives analog or digital voice data from microphone 320 or other outgoing baseband data (such as network data, e-mail, or interactive video game data) from processor/controller 340. TX processing circuitry 315 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceiver 310 receives the outgoing processed baseband or IF signals from TX processing circuitry 315 and upconverts the baseband or IF signals to RF signals, which are transmitted via antenna 305.

The processor/controller 340 can include one or more processors or other processing devices and executes the OS 361 stored in the memory 360 in order to control overall operation of the UE 116. For example, processor/controller 340 may be capable of controlling the reception of forward channel signals and the transmission of reverse channel signals by RF transceiver 310, RX processing circuitry 325, and TX processing circuitry 315 in accordance with well-known principles. In some embodiments, processor/controller 340 includes at least one microprocessor or microcontroller.

The processor/controller 340 can also execute other processes and programs resident in the memory 360, such as operations for channel quality measurement and reporting for systems having 2D antenna arrays as described in embodiments of the present disclosure. Processor/controller 340 is capable of moving data into and out of memory 360 as needed to perform a process. In some embodiments, processor/controller 340 is configured to execute applications 362 based on OS 361 or in response to signals received from the gNB or the operator. The processor/controller 340 is also coupled to an I/O interface 345, where the I/O interface 345 provides the UE 116 with the ability to connect to other devices, such as laptop computers and handheld computers. I/O interface 345 is the communication path between these accessories and processor/controller 340.

The processor/controller 340 is also coupled to input device(s) 350 and a display 355. The operator of the UE 116 can input data into the UE 116 using the input device(s) 350. Display 355 may be a liquid crystal display or other display capable of presenting text and/or at least limited graphics (such as from a website). A memory 360 is coupled to the processor/controller 340. A portion of memory 360 can include Random Access Memory (RAM) while another portion of memory 360 can include flash memory or other Read Only Memory (ROM).

Although fig. 3a shows one example of the UE 116, various changes can be made to fig. 3 a. For example, the various components in FIG. 3a can be combined, further subdivided, or omitted, and additional components can be added according to particular needs. As a particular example, the processor/controller 340 can be divided into multiple processors, such as one or more Central Processing Units (CPUs) and one or more Graphics Processing Units (GPUs). Also, while fig. 3a shows the UE 116 configured as a mobile phone or smart phone, the UE can be configured to operate as other types of mobile or fixed devices.

Fig. 3b illustrates an example gNB 102 according to the present disclosure. The embodiment of the gNB 102 shown in fig. 3b is for illustration only, and the other gnbs of fig. 1 can have the same or similar configuration. However, the gNB has a wide variety of configurations, and fig. 3b does not limit the scope of the present disclosure to any particular implementation of the gNB. Note that gNB 101 and gNB 103 can include the same or similar structure as gNB 102.

As shown in fig. 3b, the gNB 102 includes a plurality of antennas 370a-370n, a plurality of RF transceivers 372a-372n, Transmit (TX) processing circuitry 374, and Receive (RX) processing circuitry 376. In some embodiments, one or more of the plurality of antennas 370a-370n comprises a 2D antenna array. The gNB 102 also includes a controller/processor 378, a memory 380, and a backhaul or network interface 382.

The RF transceivers 372a-372n receive incoming RF signals, such as signals transmitted by UEs or other gnbs, from the antennas 370a-370 n. RF transceivers 372a-372n down-convert the incoming RF signals to generate IF or baseband signals. The IF or baseband signal is sent to RX processing circuitry 376, where RX processing circuitry 376 generates a processed baseband signal by filtering, decoding, and/or digitizing the baseband or IF signal. The RX processing circuit 376 sends the processed baseband signals to the controller/processor 378 for further processing.

TX processing circuitry 374 receives analog or digital data (such as voice data, network data, e-mail, or interactive video game data) from controller/processor 378. TX processing circuitry 374 encodes, multiplexes, and/or digitizes the outgoing baseband data to generate a processed baseband or IF signal. RF transceivers 372a-372n receive outgoing processed baseband or IF signals from TX processing circuitry 374 and upconvert the baseband or IF signals into RF signals for transmission via antennas 370a-370 n.

Controller/processor 378 can include one or more processors or other processing devices that control the overall operation of gNB 102. For example, the controller/processor 378 can control the reception of forward channel signals and the transmission of reverse channel signals through the RF transceivers 372a-372n, RX processing circuitry 376, and TX processing circuitry 374 according to well-known principles. The controller/processor 378 can also support additional functions, such as higher-level wireless communication functions. For example, the controller/processor 378 can perform a Blind Interference Sensing (BIS) process, such as by performing a BIS algorithm, and decode the received signal with the interference signal subtracted. Controller/processor 378 may support any of a wide variety of other functions in the gNB 102. In some embodiments, controller/processor 378 includes at least one microprocessor or microcontroller.

Controller/processor 378 is also capable of executing programs and other processes resident in memory 380, such as a base OS. The controller/processor 378 can also support channel quality measurement and reporting for systems with 2D antenna arrays as described in embodiments of the present disclosure. In some embodiments, controller/processor 378 supports communication between entities such as a web RTC. Controller/processor 378 can move data into and out of memory 380 as needed to perform a process.

Controller/processor 378 is also coupled to a backhaul or network interface 382. Backhaul or network interface 382 allows gNB 102 to communicate with other devices or systems over a backhaul connection or over a network. Backhaul or network interface 382 can support communication via any suitable wired or wireless connection(s). For example, when the gNB 102 is implemented as part of a cellular communication system (such as one supporting 5G or new radio access technologies or NR, LTE or LTE-a), the backhaul or network interface 382 can allow the gNB 102 to communicate with other gnbs over wired or wireless backhaul connections. When gNB 102 is implemented as an access point, backhaul or network interface 382 can allow gNB 102 to communicate with a larger network (such as the internet) via a wired or wireless local area network or via a wired or wireless connection. Backhaul or network interface 382 includes any suitable structure that supports communication over a wired or wireless connection, such as an ethernet or RF transceiver.

A memory 380 is coupled to the controller/processor 378. A portion of memory 380 can include RAM and another portion of memory 380 can include flash memory or other ROM. In some embodiments, a plurality of instructions, such as a BIS algorithm, are stored in memory. The plurality of instructions are configured to cause the controller/processor 378 to perform a BIS process and decode the received signal after subtracting at least one interfering signal determined by a BIS algorithm.

As described in more detail below, the transmit and receive paths of gNB 102 (implemented using RF transceivers 372a-372n, TX processing circuitry 374, and/or RX processing circuitry 376) support aggregated communication with FDD and TDD cells.

Although fig. 3b shows one example of a gNB 102, various changes may be made to fig. 3 b. For example, the gNB 102 can include any number of each of the components shown in fig. 3 a. As a particular example, the access point can include a number of backhauls or network interfaces 382 and the controller/processor 378 can support routing functions to route data between different network addresses. As another particular example, although shown as including a single instance of TX processing circuitry 374 and a single instance of RX processing circuitry 376, gNB 102 can include multiple instances of each (such as one for each RF transceiver).

Fig. 4 illustrates a contention-based random access procedure in accordance with an example of the present disclosure.

Transmissions in a wireless communication system include: the transmission from the base station (gNB) to the User Equipment (UE) (referred to as downlink transmission) is referred to as downlink timeslot, the transmission from the UE to the base station (referred to as uplink transmission) is referred to as uplink timeslot.

In downlink communication in a wireless communication system, the system periodically transmits a synchronization signal and a broadcast channel to a user through a Synchronization Signal Block (SSB), which is an SSB period (SSB period) or referred to as an SSB burst period. Meanwhile, the base station configures a random access configuration period (PRACH configuration period), configures a certain number of random access transmission opportunities (also called random access opportunities, ROs) in the period, and satisfies that all SSBs can be mapped to corresponding ROs in a mapping period (certain time length).

In a New Radio (NR) communication system, the performance of random access directly affects the user experience before the establishment of Radio resource control, for example, during random access. In conventional wireless communication systems, such as LTE and LTE-Advanced, a Random Access procedure is applied to multiple scenarios, such as establishing an initial link, performing cell handover, re-establishing an uplink, and re-establishing an RRC connection, and is divided into Contention-based Random Access (Contention-based Random Access) and non-Contention-based Random Access (Contention-free Random Access) according to whether a user has exclusive use of a preamble sequence resource. In contention-based random access, in the process of trying to establish uplink, each user selects a preamble sequence from the same preamble sequence resource, and it may happen that a plurality of users select the same preamble sequence to send to a base station, so a collision resolution mechanism is an important research direction in random access, how to reduce collision probability and how to quickly resolve an occurred collision, and is a key index affecting random access performance.

The contention-based random access procedure in LTE-a is divided into four steps, as shown in fig. 4. In the first step, the user randomly selects a leader sequence from the leader sequence resource pool and sends the leader sequence to the base station. The base station carries out correlation detection on the received signal so as to identify a leader sequence sent by a user; in the second step, the base station sends a Random Access Response (RAR) to the user, wherein the RAR includes a Random Access preamble sequence Identifier, a timing advance command determined according to the time delay estimation between the user and the base station, a Temporary Cell Radio Network Temporary Identifier (C-RNTI), and a time-frequency resource allocated for the next uplink transmission of the user; in the third step, the user sends a third message (Msg3) to the base station according to the information in the RAR. The Msg3 includes information such as a user terminal identifier and an RRC connection request, wherein the user terminal identifier is unique for a user and is used for resolving a conflict; in the fourth step, the base station sends conflict resolution identification to the user, including the identification of the user terminal that wins the conflict resolution. And after detecting the own identity, the user upgrades the temporary C-RNTI into the C-RNTI and sends an ACK signal to the base station to finish the random access process and wait for the scheduling of the base station. Otherwise, the user will start a new random access procedure after a delay.

For a non-contention based random access procedure, since the base station knows the user identity, the user may be assigned a preamble sequence. Therefore, when the user sends the preamble sequence, the user does not need to randomly select the sequence, and the allocated preamble sequence is used. After detecting the allocated preamble sequence, the base station sends a corresponding random access response, including information such as timing advance and uplink resource allocation. And after receiving the random access response, the user considers that the uplink synchronization is finished and waits for the further scheduling of the base station. Therefore, the non-contention based random access procedure only comprises two steps: step one is to send a leader sequence; and step two, sending the random access response.

The random access procedure in LTE is applicable to the following scenarios:

initial access under RRC _ IDLE;

2. reestablishing the RRC connection;

3. cell switching;

downlink data arrives and requests the random access process in the RRC connection state (when the uplink is in the asynchronous state);

when the uplink is in the asynchronous state or in PUCCH resources, resources are not allocated to the scheduling request; and

6. and (6) positioning.

In some communication systems (licensed and/or unlicensed spectrum), to enable faster transmission and reception of signals, it is considered to transmit a random access preamble along with a data portion (denoted as a first message, message a), and then search for feedback from a network device in a downlink channel (denoted as a second message, message B). However, because of the presence of different uplink signals, the UE may encounter a problem of how to handle multiple uplink signals.

Fig. 5 illustrates a random access procedure according to another example of the present disclosure.

Specifically, in the present disclosure, the UE obtains resource allocation information of the uplink signal from information configured and/or preconfigured on the network side to obtain resource allocation of two-step random access, and performs transmission of the two-step random access. Wherein the resource configuration information at least comprises one of:

1. four-step random access configuration information (i.e. conventional random access configuration information); including at least one of:

■ four steps random access configuration period (P _4 STEPRACH);

■ four-step random access opportunity time unit index (such as slot index, symbol index, subframe index, etc.);

■ four-step random access opportunity frequency domain unit index (such as carrier index, BWP index, PRB index, subcarrier index, etc.);

■ random access opportunity number;

■ four-step random access preamble format (such as Cyclic Prefix (CP) length, preamble sequence length and repetition number, guard interval (GT) length, used subcarrier spacing size, etc.);

■ random access of the number of lead codes, the index of root sequence, cyclic shift value;

■ the number of SSBs that can be mapped on a four-step random access opportunity (4STEPRO, 4step RACH occasion);

■ one or more CSI-RS indexes for four-step random access;

■ number of 4STEPRO mapped by one CSI-RS; and

■ one or more 4STEPRO indices of a CSI-RS map.

2. Two steps of random access configuration information; including at least one of:

■ two-step random access configuration period (P _2 STEPRACH);

■ two-step random access opportunity time unit index (such as slot index, symbol index, subframe index, etc.);

■ two-step random access opportunity frequency domain unit index (such as carrier index, BWP index, PRB index, subcarrier index, etc.);

■ number of random access opportunities in two steps;

■ two-step random access preamble format (e.g., Cyclic Prefix (CP) length, preamble sequence length and repetition number, guard interval (GT) length, used subcarrier spacing size, etc.);

■ random access of the two steps of the number of the lead codes, the index of the root sequence and the cyclic shift value;

■ the number of SSBs that can be mapped on a two-step random access opportunity (2STEPRO, 2step RACH event);

■ one or more CSI-RS indices for two-step random access;

■ number of 2STEPRO mapped by one CSI-RS; and

■ one or more 2STEPRO indices of a CSI-RS map.

In some cases, if the parameters in the two-step random access configuration information are not configured separately, the UE may determine the relative relationship between the parameters in the four-step random access configuration information, for example, the four-step random access configuration period and a predefined or configured extended parameter are calculated to obtain the two-step random access configuration period.

3. Downlink beam (e.g., SSB and/or CSI-RS) configuration information; including at least one of:

■ downlink beam period size;

■ the number of downlink beams transmitted in one downlink beam period;

■ index of downlink beam transmitted in one downlink beam period;

■ time cell location of transmitted downlink beam within one downlink beam period; and

■ frequency domain element location of the transmitted downlink beam within one downlink beam period.

4. The two-step random access data resource configuration information, namely the resource configuration information of the Physical Uplink Shared Channel (PUSCH), wherein a PUSCH resource unit (composed of a PUSCH time-frequency resource unit and a DMRS resource) comprises at least one of the following items:

■ time-frequency resource configuration information of PUSCH; including at least one of:

one or more PUSCH time-frequency resource unit sizes (that is, the PUSCH time-frequency resource size corresponding to one two-step random access preamble includes M time units and N frequency units, and if there are multiple PUSCH time-frequency resource units, the sizes of different PUSCH time-frequency resource units may be different, that is, the values of M and/or N may be different due to different PUSCH time-frequency resource units), which may be obtained by table lookup;

time-frequency resource configuration period of PUSCH (P _ PUSCH);

time element indexes (e.g., slot (slot) index, symbol (symbol) index, subframe (subframe) index, etc.) of the PUSCH time-frequency resource elements;

frequency domain element indexes (such as carrier index, BWP index, PRB index, subcarrier index, etc.) of PUSCH time-frequency resource elements;

time domain starting position of time frequency resource of PUSCH; the time domain starting position may be a time domain interval of a time range in which the PUSCH time frequency resource configured by the network device and the corresponding two-step random access time frequency resource are located, that is, N time units; and/or the time length occupied by the PUSCH time frequency resources configured by the network device, i.e. M1 time units or M1 time frequency resource units for two-step random access to the PUSCH (the time frequency resource unit is defined as the time frequency resource size for transmitting a data part of a specific size, and consists of predefined X time units and Y frequency domain units); a guard interval (delta time units) may be present between the time-frequency resources of two adjacent two-step random access PUSCHs in the same time slot, and the guard interval may be within the time-frequency resource unit of the PUSCH (that is, delta is included in X) or outside the time-frequency resource unit of the PUSCH (that is, delta is included outside X). Specifically, the configured time-frequency resource units of the M1 two-step random access PUSCH are in a time range corresponding to one of the two-step random access time-frequency resources, for example, the time-frequency resource units of the M1 two-step random access PUSCH configured by the base station device can be found from a given RACH slot, and the time-frequency resource units of the M1 two-step random access PUSCH configured by the base station device can also be found from another RACH slot;

the frequency domain starting position of the time-frequency resource of the PUSCH; predefining or configuring a frequency domain starting position, for example, the frequency domain starting position of the two-step random access PUSCH is formed after N frequency domain units away from one frequency domain position; wherein, the one frequency domain position may be:

i. a band part (bandwidth part, bwp); frequency domain starting position of carrier wave (e.g. first frequency domain unit)

A frequency domain starting position (e.g., a first frequency domain unit) of the selected two-step random access RO;

and/or M2 frequency domain elements (or resource elements of a two-step random access PUSCH); in the frequency domain, there may be guard carriers (delta frequency domain units) between two adjacent resources of the two-step random access PUSCH in the same time, where the guard carriers may be within resource units of the PUSCH (i.e., delta is included in Y) or outside resource units of the PUSCH (i.e., delta is included outside Y);

specifically, the indicated time domain starting position of the time frequency resource of the PUSCH is the position of the first PUSCH time frequency resource unit, and/or the indicated frequency domain starting position of the time frequency resource of the PUSCH is the position of the first PUSCH time frequency resource unit; other time frequency resources corresponding to all the two-step random access time frequency resources within the time range of the two-step random access time frequency resources selected by the UE are obtained by sequential derivation in a frequency domain-first time domain-second time domain mode or a time domain-first time domain-second frequency domain mode;

PUSCH time-frequency resource unit number (or PUSCH time-frequency resource unit number in time domain and/or PUSCH time-frequency resource unit number in frequency domain are respectively configured);

PUSCH time-frequency resource element formats (e.g., repetition times, guard interval (GT) length, guard frequency domain interval GP, etc.);

the number of downlink beams which can be mapped on one PUSCH time frequency resource unit;

one or more downlink beam indexes for two-step random access PUSCH transmission;

the number of PUSCH time-frequency resource units mapped by one downlink wave beam;

one or more PUSCH time-frequency resource element indexes mapped by one downlink wave beam;

specifically, when the UE determines the location of the PUSCH time-frequency resource element on each slot through the above configuration, some configurations may cause the PUSCH time-frequency resource element determined by the UE to include a slot boundary (here, the slot boundary is taken as an example, and may be another time-frequency element) or to be in an adjacent or subsequent slot beyond the slot. As illustrated in fig. 6, the UE determines that slot 0 is the starting slot of the PUSCH resource, and then, starting from symbol 4 in slot 0, each PUSCH time-frequency resource unit occupies 4 OFDM symbols and is configured with 4 PUSCH time-frequency resource units, so that PUSCH time-frequency resource unit 2 includes a slot boundary (i.e., a cross-boundary), and the position of PUSCH time-frequency resource unit 3 extends into adjacent slot 1 beyond the present slot. For the above scenario, the UE may have at least one of the following operations:

a) partitioning the boundary-crossing PUSCH time-frequency resource units according to the boundary; for example, the PUSCH time-frequency resource unit 2 in fig. 6 is divided into two parts, the first part is the

symbols

12 and 13 in the slot 0, that is, the PUSCH time-frequency resource unit part reserved in the current slot; the second part is the

symbol

0, 1 in the slot 1, i.e. the second part is equivalent to the PUSCH time-frequency resource element part extending to the adjacent slot; the PUSCH time-frequency resource unit part can also be regarded as a special PUSCH time-frequency resource unit determined by the UE. Preferably, the PUSCH time-frequency resource element portion is deemed invalid when it is less than (or not greater than or equal to) a configured or fixed length (e.g., 1 symbol); when the PUSCH time-frequency resource unit part is larger than (or not smaller than) a configured or fixed length, the PUSCH time-frequency resource unit part is determined to be effective;

b) and judging the PUSCH time-frequency resource units and/or PUSCH time-frequency resource unit parts extending to the adjacent or subsequent time slots as invalid PUSCH time-frequency resource units and/or PUSCH time-frequency resource unit parts. That is, the PUSCH time-frequency resource unit and/or the PUSCH time-frequency resource unit part is valid when it is within the current time slot (not exceeding the current time slot boundary), where the current time slot refers to the PUSCH time-frequency resource unit and/or the PUSCH time-frequency resource unit part obtained according to the starting position of the first PUSCH time-frequency resource unit in the time slot, the number of time-domain units of the PUSCH time-frequency resource unit, and the number of PUSCH time-frequency resource units configured in the time slot. Preferably, the PUSCH time-frequency resource elements and/or PUSCH time-frequency resource element portions extending into an adjacent or subsequent time slot are still valid if they do not overlap or are spaced more (or not less) than a certain threshold (e.g. a fixed or configured guard time interval (guard period);

c) preferably, the validity determination may be combined with an existing validity determination, for example, in addition to the above conditions, if the PUSCH time-frequency resource unit and/or the PUSCH time-frequency resource unit portion extended into the adjacent or subsequent time slot does not overlap with the downlink symbol or the SSB, or the interval is smaller than (or not greater than) a certain threshold (such as a fixed or configured interval value), or does not overlap with the configured (or valid) RO, the PUSCH time-frequency resource unit and/or the PUSCH time-frequency resource unit portion extended into the adjacent or subsequent time slot is determined to be valid;

d) preferably, when the UE transmits a signal on the PUSCH time-frequency resource unit, the coding rate and/or the modulation scheme is reselected according to a Transport Block Size (TBS) determined on a normal PUSCH time-frequency resource unit, (i.e., rate matching); or the data preparation is carried out according to the Transport Block Size (TBS) and the coding rate and/or modulation mode determined on the normal PUSCH time-frequency resource unit, but during transmission, the signal exceeding the PUSCH time-frequency resource unit is not transmitted (i.e. the punch-out is removed);

e) preferably, the UE does not expect to receive a configuration resulting in a determined PUSCH time-frequency resource element and/or PUSCH time-frequency resource element portion (and/or fixed or configured guard time interval) spanning a slot interval or extending into an adjacent or subsequent slot; that is, the UE assumes or expects that certain PUSCH time-frequency resource elements (and/or guard time intervals) do not span a slot interval or extend into adjacent or subsequent slots;

f) preferably, the time slot is only an exemplary time domain unit, and may be other time domain units, such as a subframe, a system frame, or the like;

g) preferably, the length of the PUSCH time-frequency resource element may also be a length including a fixed or configured guard time interval.

■ DMRS configuration information; including at least one of:

the number N _ DMRS and/or index of DMRS ports available on one PUSCH time-frequency resource element (i.e., each DMRS port corresponds to its own port configuration information) and/or DMRS sequence index (e.g., may be scrambling ID, etc.); and

DMRS port configuration information, including at least one of:

i. sequence type, such as indicating whether it is a ZC sequence, gold sequence, etc.;

cyclic shift interval (cyclic shift);

length (sequence length), i.e., the subcarriers occupied by DMRS sequences;

time domain orthogonal cover code (TD-OCC), for example a TD-OCC of length 2 may be: [ +1, -1], [ -1, +1 ];

frequency domain orthogonal cover code (FD-OCC), for example, an FD-OCC of length 2 may be: [ +1, -1], [ -1, +1 ];

comb configuration (comb configuration) including comb size (comb size) and/or comb offset (comb offset), e.g., if size is 4 and offset is 0, then 0 th RE of every 4 REs of DMRS sequence is represented; if the size is 4 and the offset is 1, it indicates the 1 st RE of every 4 REs of the DMRS sequence.

5. Configuration type information; for the data resource configuration information of the two-step random access, the network side may have two possible configuration types:

■ type one: the UE obtains the configured two-step random access data resources through the independent two-step random access data resource configuration information of the network side, and then the UE can obtain the mapping relation between the random access resources and the data resources through the defined mapping parameters and/or rules of the random access resources and the data resources;

■ type two: the network side obtains the configured data resources of the two-step random access and obtains the mapping relation between the random access resources and the data resources by configuring the relative time-frequency relation (such as time domain and/or frequency domain interval) between the data resources of the two-step random access and the random access resources of the two-step random access and/or the defined mapping parameters and/or rules between the random access resources and the data resources;

regarding part or all of the above resource configuration information, the UE may obtain from at least one of:

1. in a random access feedback (RAR) of a random access procedure, for example, in uplink scheduling (UL grant) information therein;

2. downlink control information for scheduling uplink transmission, for example, uplink scheduling (UL grant) information therein or a single DCI configuration; wherein the scheduled uplink transmission may be a new transmission of data or a retransmission of data;

3. high-level control signaling such as RRC configuration information and the like in a system message sent by a network side or acquired by UE; and

4. pre-configured parameter information.

Specifically, the UE may obtain part or all of the resource configuration information in at least one of the above manners, for example, the time-frequency resource configuration information of the PUSCH is obtained in a system message, and the DMRS configuration information is obtained by RRC configuration information of the UE.

Specifically, when the configured two-step random access and four-step random access share the random access time-frequency resource, the two-step random access may share part of the random access time-frequency resource of the four-step random access, and the UE may obtain part of the shared RO for the two-step random access.

Based on the configuration information, the UE may obtain mapping information of a downlink beam (taking SSB as an example) to an RO (including a four-step random access RO and/or a two-step random access RO), where the mapping information includes at least one of the following:

● SSB to RO mapping period (such as the number of random access configuration period needed to complete at least one SSB to RO mapping);

● SSB to RO mapping pattern period (e.g. ensuring SSB to RO mapping in two adjacent mapping pattern periods is identical time length, such as required number of SSB to RO mapping periods, or required number of random access configuration periods).

Similarly, the UE may obtain mapping information of CSI-RS to RO based on the configuration information, including at least one of:

● mapping period from CSI-RS to RO (such as the number of random access configuration periods needed to complete mapping from all CSI-RS to RO in at least one CSI-RS period);

● mapping pattern periods of CSI-RS to RO (e.g. ensuring that the mapping of CSI-RS to RO in two adjacent mapping pattern periods is exactly the same time length, such as the required number of mapping periods of CSI-RS to RO, or the required number of random access configuration periods).

For determining the resource configuration of the two-step random access, the UE further needs to determine a mapping relationship between the random access resources of the two-step random access and the data resources of the two-step random access, where the mapping relationship at least includes one of the following items:

1. a mapping period of the random access resources of the two-step random access and the data resources of the two-step random access,

2. and mapping rules of the random access resources of the two-step random access and the data resources of the two-step random access, such as mapping parameters from the random access resources to the data resources.

According to the received configuration information, the UE may obtain the four-step random access configuration information and the two-step random access configuration information at the same time, and the UE may directly configure and indicate which random access is to be performed through the base station; or through an RSRP threshold value configured by the base station, if the RSRP measured by the UE is higher than the threshold, selecting to perform two-step random access; otherwise, performing four-step random access.

After determining to perform the two-step random access, the UE determines the random access resources and data resources configured by the base station device for the two-step random access according to the received configuration information. The UE needs to perform validity detection on the random access resource and the data resource according to a certain rule, that is, determine whether the configured random access resource and the configured data resource are available, so as to obtain: an effective random access resource (valid msgA PRACH resource), e.g., an effective PRACH opportunity (valid PRACH opportunity); and valid PUSCH resources (valid PUSCH resources) for valid two-step random access, e.g., valid PUSCH time-frequency resource elements (valid PUSCH allocation).

For an OFDM symbol (symbol group) occupied by an effective PUSCH time-frequency resource and/or Ngap OFDM symbols (symbol group) before the effective PUSCH time-frequency resource, if a PDCCH, a PDSCH or a CSI-RS is received and the symbol (symbol group) has an overlapping part, the UE does not receive the PDCCH, the PDSCH or the CSI-RS in the time slot where the symbol (symbol group) is located, and the Ngap is a preset number of symbols. The symbols (symbol groups) are configured to be downlink and/or flexible in the time division uplink and downlink common configuration or the time division uplink and downlink individual configuration which is not expected to be received by the UE; and/or the symbol (symbol group) is indicated as downlink or flexible by the value of the slot format indication index carried by one downlink control information format 2_0(DCI format 2_0) which the UE does not expect to receive.

Through the method, the effective PUSCH opportunity (valid PUSCH occasion) in the two-step random access can be protected.

After the UE determines the resource validity, the obtained effective two-step random access resource and the effective two-step random access data resource are mapped in a certain period, where the certain period may be at least one of:

1. predefined periods, e.g., 10 milliseconds, 20 milliseconds, 40 milliseconds, 80 milliseconds, 160 milliseconds, etc.

2. The relative period of the random access resources of the two-step random access; the correlation period of the random access resources of the two-step random access may include at least one of: a mapping ring of downlink beams to random access resources for two-step random access, e.g., a mapping ring of SSBs to ROs; a configuration period of random access resources for two-step or four-step random access; a mapping period from a downlink beam to random access resources of two-step or four-step random access; a mapping pattern period of the downlink beam to random access resources for two-step or four-step random access. It should be understood that the above listed items are exemplary only and the present disclosure is not limited thereto.

3. The correlation period of the data resources of the two-step random access; the relevant period of the data resources of the two-step random access may include at least one of: a mapping ring from a downlink beam to two-step random access data resources, for example, a mapping ring from SSB to PUSCH; a configuration period of two-step random access data resources; a mapping period from the downlink wave beam to the two-step random access data resource; and the period of the mapping pattern from the downlink beam to the two-step random access data resource. It should be understood that the above listed items are exemplary only and the present disclosure is not limited thereto.

4. The relative period of the random access resources of the two-step random access is a larger period or a smaller period of the relative period of the data resources of the two-step random access.

Through the validity judgment and mapping operation, the UE can find available PUSCH resources (PUSCH time-frequency resources and DMRS resources) through the determined (selected) two-step random access RO and the preamble (preamble) and through the mapping result. And if N is more than 1 PUSCH resource, the UE selects one PUSCH resource from the medium probability to carry out corresponding PUSCH transmission.

Optionally, the UE may have other uplink transmissions (for example, uplink transmission scheduled by DCI, or uplink transmission configured by a higher layer) when performing two-step random access (or four-step random access), and the UE needs to handle multiple uplink signal transmissions.

If the UE has one or more of the following signals as signal X:

● message a (msga) for two-step random access;

● random access signal of message A (msgA PRACH);

● message A data part signal (msgA PUSCH);

● message 1(PRACH) of four-step random access;

and/or one or more of the following signals as signal Y:

● high priority uplink control channel (PUCCH with large priority index), for example, priority index 1(priority index 1);

● low priority uplink control channel (PUCCH with small priority index), for example, priority index 0(priority index 0);

● high priority uplink shared channel (PUSCH with large priority index), for example, priority index 1(priority index 1);

● a low priority uplink shared channel (PUSCH with small priority index), for example, priority index 0(priority index 0);

● Sounding Reference Signal (SRS); specifically, the method comprises the following steps:

periodic SRS has high priority; aperiodic SRS has low priority;

periodic SRS has low priority; aperiodic SRS has high priority;

periodic and aperiodic SRS have the same high (or low) priority; or

● other upstream signals having different timing advance adjustment values than message X;

and the signal X and the information Y are at least one of the following conditions:

● transmission opportunities (transmission opportunities) of signal X and signal Y overlap (partially or fully) in time and/or frequency domain;

● the transmission opportunity (transmission opportunity) of signal X and signal Y is in the same time slot; the time slot can be determined by the subcarrier interval of the signal X or the signal Y or the BWP;

● signal X is not in the same time slot as signal Y; but do not

The interval between the last OFDM symbol of signal X in the previous slot and the first OFDM symbol of signal Y in the following slot is smaller than (and/or equal to) a predefined (or network-configured) threshold value N; and or (b) a,

the interval between the last OFDM symbol of signal Y in the previous slot and the first OFDM symbol of signal X in the following slot is smaller than (and/or equal to) a predefined (or network-configured) threshold value N;

the UE may perform one or a combination of the following:

● UE sends signal X, does not send signal Y; i.e. signal X is considered to be of higher priority; priority of the protection signal X (random access related signal);

● the UE autonomously selects one signal to transmit, i.e., the UE may transmit signal X without transmitting signal Y, or the UE may transmit signal Y without transmitting signal X; that is, both signal X and signal Y are not transmitted;

● the UE sends a signal that occurs before, e.g. if signal X occurs before signal Y, the UE sends signal X; otherwise, sending a signal Y;

● UE sends signal Y and does not send signal X; i.e. recognize signal Y as higher priority; priority of the protection signal Y;

● in some cases, during the above-described operations, when the UE does not transmit signal X and signal X is the message A random access signal (msgA PRACH), then if the message A random access signal has a corresponding message A data portion signal, the UE does not transmit the corresponding message A data portion signal (msgA PUSCH)

● alternatively, the possible operations may be a combination of one or more of the operations described above, e.g., the UE may consider the random access signal with information X as message a as a higher priority signal when compared to signal Y and consider the data part signal (msgA PUSCH) with information X as a lower priority signal when compared to signal Y.

In this way, when the message for random access is transmitted in the same time unit or close to another uplink signal, the uplink signal can be determined to be transmitted.

Fig. 7 shows an example of how to determine a reference point for the start position of the message B detection window according to the present disclosure.

After the UE sends message a, the UE searches for possible two-step random access feedback in the control information search space configured by the network, wherein, optionally,

● when one or more of the following conditions occur, the UE tries to detect a CRC in a window of higher layer control to detect a downlink control information format 0_1(DCI format 0_1) scrambled by msgB-RNTI corresponding to the selected random access opportunity; the window starts from a position which is the first OFDM symbol (of the early control resource set) of the earliest control resource set configured in the first Type downlink control channel common search space set (Type1-PDCCH CSS set) from the UE after adding one OFDM symbol from the end position (for example, the last OFDM symbol) of the corresponding PUSCH time-frequency resource unit; wherein the length of the OFDM symbol is determined by SCS of a first type downlink control channel common search space set; meanwhile, the length of the window is calculated by the number of time slots, the number of the time slots is indicated by a configured message B feedback window, and the length of the time slots is determined by an SCS of a first type downlink control channel common search space set; the one or more conditions are:

the UE sends a complete message a, i.e. one random access preamble and one PUSCH transmission (case 1(case1) as shown in fig. 7);

UE sends an incomplete message a, i.e. only preamble, whose corresponding PUSCH resource is valid, but the PUSCH transmission is cancelled for one or more of the following reasons (as in case 2(case2) shown in fig. 7):

■ due to power allocation for PUSCH/PUCCH/PRACH/SRS transmission; cause the PUSCH of message a to not be transmitted;

■ the PUSCH of message A is not sent due to power allocation in dual link (DC), e.g., EN-DC, NE-DC, NR-DC;

■ the PUSCH of message a is not sent since the UE does not detect downlink control information format 2_0 providing slot format (slot format);

■, since the UE detects downlink control information format 2_0 providing slot format (slot format), but the detected slot format indicates that the PUSCH occupies flexible (flexible) or downlink (downlink); cause the PUSCH of message a to not be transmitted;

■ due to the operation of determining the slot format, the PUSCH for message A is not sent;

■ due to overlapping with higher priority uplink signal (PUCCH, PUSCH)

● when the UE sends an incomplete message a, i.e. only the preamble, there is no corresponding (valid) PUSCH resource; as shown in fig. 7 as an example of case 3(case3), the UE attempts to detect a CRC in a higher layer control window, which is scrambled by msgB-RNTI corresponding to the selected random access opportunity, in downlink control information format 0_1(DCI format 0_ 1); the window starts at a position, which is the first OFDM symbol (of the early control resource set) of the earliest control resource set configured in the first Type downlink control channel common search space set (Type1-PDCCH CSS set) from the slave UE after adding at least one symbol from an end position (e.g., the last OFDM symbol) of the corresponding PRACH; wherein the length of the OFDM symbol is determined by SCS of a first type downlink control channel common search space set; meanwhile, the length of the window is calculated by the number of time slots, the number of the time slots is indicated by a configured message B feedback window, and the length of the time slots is determined by SCS of the first type downlink control channel common search space set.

And the UE performs subsequent operation according to the type of the received downlink feedback and the content in the downlink feedback.

By the method, the reference points of the starting positions of the different random access response windows can be determined according to the different sending conditions of the messages for random access.

Referring to fig. 8, a UE (800) includes a transceiver (801), a processor (802), and a memory (803). The transceiver (801), processor (802), and memory (803) are configured to perform the operations of the UE shown in the figures (e.g., fig. 1-7) or described above.

The above description is only exemplary of the present disclosure and should not be taken as limiting the disclosure, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

One skilled in the art will appreciate that the present disclosure includes apparatus related to performing one or more of the operations described in the present disclosure. These devices may be specially designed and manufactured for the required purposes, or they may comprise known devices in general-purpose computers. These devices have stored therein computer programs that are selectively activated or reconfigured. Such a computer program may be stored in a device (e.g., computer) readable medium, including, but not limited to, any type of disk including floppy disks, hard disks, optical disks, CD-ROMs, and magnetic-optical disks, ROMs (Read-Only memories), RAMs (Random Access memories), EPROMs (Erasable Programmable Read-Only memories), EEPROMs (Electrically Erasable Programmable Read-Only memories), flash memories, magnetic cards, or optical cards, or any type of media suitable for storing electronic instructions, and each coupled to a bus. That is, a readable medium includes any medium that stores or transmits information in a form readable by a device (e.g., a computer).

It will be understood by those within the art that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by computer program instructions. Those skilled in the art will appreciate that the computer program instructions may be implemented by a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, implement the aspects specified in the block or blocks of the block diagrams and/or flowchart illustrations of the present disclosure.

Those of skill in the art will appreciate that the various operations, methods, steps in the processes, acts, or solutions discussed in the present disclosure may be interchanged, modified, combined, or eliminated. Further, other steps, measures, schemes in various operations, methods, flows that have been discussed in this disclosure may also be alternated, altered, rearranged, broken down, combined, or deleted. Further, steps, measures, schemes in the prior art having various operations, methods, procedures disclosed in the present disclosure may also be alternated, modified, rearranged, decomposed, combined, or deleted.

The foregoing is only a partial embodiment of the present disclosure, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present disclosure, and these modifications and decorations should also be regarded as the protection scope of the present disclosure.

Claims

1. A method for random access of a User Equipment (UE), comprising:

obtaining effective random access resources and data resources based on the configuration information;

sending a message for random access by using the effective random access resource and data resource; and

feedback is detected in a random access response window determined according to a transmission situation of a message for random access,

wherein the message for random access includes a random access signal and a data part signal.

2. The method of claim 1, wherein obtaining valid random access resources and data resources based on configuration information comprises:

determining random access resources and data resources configured for random access based on the configuration information;

carrying out validity detection on the determined random access resources and data resources to obtain valid random access resources and data resources;

mapping the effective random access resources and the effective data resources in a period; and

and obtaining effective Physical Uplink Shared Channel (PUSCH) resources based on the mapping result.

3. The method of claim 2, further comprising performing at least one of the following for OFDM symbols or symbol groups occupied by valid PUSCH time-frequency resources and/or Ngap OFDM symbols or symbol groups preceding valid PUSCH time-frequency resources:

the UE does not receive a Physical Downlink Control Channel (PDCCH), a Physical Downlink Shared Channel (PDSCH) or a channel state information reference signal (CSI-RS) on the time slot where the symbol or the symbol group is located;

the UE does not expect the received time division uplink and downlink common configuration or time division uplink and downlink independent configuration to configure the symbols or the symbol groups into downlink and/or flexibility; and

the value of the slot format indication index carried by the downlink control information format 2_0 that the UE does not expect to receive indicates the symbol or group of symbols as downlink and/or flexible,

wherein, the Ngap is a predefined number of symbols.

4. The method of claim 1, further comprising, in a case where there is transmission of a further uplink signal while transmitting the uplink signal related to the message for random access, performing at least one of the following if the uplink signal related to the message for random access and the further uplink signal satisfy a predetermined overlap condition:

transmitting an uplink signal related to a message for random access;

transmitting the additional uplink signal;

transmitting the signal that occurred previously; and

autonomously selecting one of the uplink signal associated with the message for random access and the further uplink signal for transmission.

5. The method of claim 4, wherein the uplink signal related to the message for random access comprises at least one of:

a message for random access;

a random access signal for a message for random access;

a data part signal of a message for random access; and

message 1 of four-step random access.

6. The method of claim 4, wherein the further uplink signal comprises at least one of:

an uplink control channel PUCCH signal;

an uplink shared channel, PUSCH, signal;

sounding reference signals, SRS; and

an uplink signal having a timing advance adjustment value different from a signal related to a message for random access.

7. The method of claim 4, wherein the predetermined overlap condition comprises at least one of:

transmission opportunities for a signal related to a message for random access and the further uplink signal partially or fully overlap in time and/or frequency domain;

the signal related to the message for random access and the further uplink signal are in the same time slot; and

both the signal relating to the message for random access and said further uplink signal are not in the same time slot, but the interval between the last OFDM symbol of one of the two in a preceding time slot and the first OFDM symbol of the other of the two in a following time slot is smaller than and/or equal to a threshold value,

wherein the time slot is determined by a signal related to a message for random access and the further uplink signal, or by a subcarrier spacing of the band part BWP in which,

and wherein the specific threshold value is configured or predefined by the network.

8. The method of claim 5, further comprising:

if the signal related to the message for random access is not transmitted and is a random access signal of the message for random access, a data part signal of the corresponding message for random access is not transmitted.

9. The method of claim 5, further comprising:

the random access signal of the message for random access and the data part signal of the message for random access are given different priorities.

10. The method of any preceding claim, wherein determining a random access response window based on the transmission of the message for random access comprises:

if a random access signal of the message for random access and a data part signal of the message for random access are transmitted, or only the random access signal of the message for random access is transmitted but there is an effective PUSCH time-frequency resource for the data part signal of the message for random access, the random access response window starts from a first OFDM symbol of an earliest control resource set in a first type downlink control channel common search space set configured to the UE after adding one OFDM symbol from an end position of a corresponding PUSCH time-frequency resource unit; and

if only random access signals of the message for random access are transmitted and there is no valid PUSCH time-frequency resource for a data part signal of the message for random access, the random access response window starts from a first OFDM symbol of an earliest set of control resources in a first type downlink control channel common search space set configured to the UE after adding at least one OFDM symbol from an end position of a corresponding PRACH time-frequency resource,

the length of the OFDM symbol is determined by the subcarrier interval of the first type downlink control channel common search space set.

11. The method of claim 10, wherein the length of the random access response window is a number of slots multiplied by a slot length, wherein the length of the slot is determined by a subcarrier spacing of the first type downlink control channel common search space set, and wherein the number of slots is indicated by a feedback window of the configured feedback message.

12. The method of claim 11, wherein only the random access signal of the message for random access is transmitted but there is valid PUSCH time-frequency resource for the data part signal of the message for random access further comprises the data part signal of the message not used for random access due to at least one of:

due to power allocation for PUSCH/PUCCH/PRACH/SRS transmissions;

due to power allocation in double-stranded DC;

since the UE does not detect the downlink control information format 2_0 providing the slot format;

as the UE detects that the downlink control information format 2_0 providing the slot format indicates that the PUSCH occupies a flexible or downlink symbol;

due to the operation of determining the slot format; and

due to overlap with high priority upstream signals.

13. A User Equipment (UE) for random access, comprising:

a transceiver to receive a signal from a base station and to transmit a signal to the base station;

a memory storing executable instructions;

a processor executing stored instructions to perform the method of any one of claims 1 to 12.