Communication method and apparatus, computer-readable storage medium, and computer program product

Abstract

The present application provides a communication method and apparatus, a computer-readable storage medium, and a computer program product. The communication method comprises: receiving random access channel (RACH) configuration information, the RACH configuration information being used for configuring at least one first random access occasion and at least one second random access occasion, the first random access occasion being located within a downlink full duplex SBFD symbol, and the second random access occasion being located within an other symbol, or the first random access occasion being located within an SBFD symbol, and the second random access occasion being located within a non-SBFD symbol; and using a first target random access occasion to send a random access request, the first target random access occasion being the first random access occasion or the second random access occasion. The present application provides a solution for performing random access for different ROs in an SBFD scenario.

Description

Communication method and apparatus, computer readable storage medium, and computer program product

[0001] This application claims priority from the Chinese patent application No. 202410815148.4 filed on June 21, 2024, and entitled "Communication method and apparatus, computer readable storage medium, and computer program product", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and in particular to a communication method and apparatus, a computer readable storage medium, and a computer program product. BACKGROUND

[0003] Due to the limitation of uplink and downlink time slot ratio of a Time Division Duplexing (TDD) system, the transmission delay of the TDD system is large. In order to reduce the implementation complexity of a base station, the transmission direction of all frequency domain resources of a TDD carrier at the same time needs to be the same, i.e., uplink or downlink, that is, the uplink and downlink time slot ratio of different frequency domain resources of a TDD carrier is relatively fixed. With the diversification of services, especially considering the service demand of vertical industries, different services have different transmission demands for uplink and downlink, and the relatively fixed uplink and downlink time slot ratio cannot meet the demands of different services. Based on the above two points, while considering the implementation complexity of the base station, a Subband Full Duplex (SBFD) solution is proposed, i.e., the base station can perform downlink transmission and uplink reception on non-overlapping frequency domain resources at the same time.

[0004] For subband full duplex, there can be different forms. As shown in FIG. 1, each symbol in time slot slot n is a downlink (DL) symbol, and the frequency domain resource corresponding to slot n does not contain an uplink subband, and uplink transmission is not allowed, each symbol in slot n is a non-SBFD symbol; each symbol in slot n+1, slot n+2 and slot n+3 is a downlink symbol, a downlink symbol and a flexible symbol respectively, and the corresponding frequency domain resource contains an uplink subband, which allows uplink transmission on the uplink subband, and downlink transmission on the positions other than the uplink subband, each symbol in slot n+1, slot n+2 and slot n+3 is an SBFD symbol. Each symbol in slot n+4 is an uplink (UL) symbol, which allows uplink transmission on the frequency domain resource corresponding to slot n+4, and each symbol in slot n+4 is also a non-SBFD symbol.

[0005] However, in the SBFD scenario, the random access occasion (RO) can be located in a downlink symbol, a downlink symbol, or a flexible symbol. For different ROs, how to perform random access is a technical problem to be solved. SUMMARY

[0006] The present application provides a scheme for random access for different ROs in the SBFD scenario.

[0007] The present application provides the following technical solutions:

[0008] In a first aspect, a communication method is provided, which includes: receiving random access channel (RACH) configuration information, the RACH configuration information being used to configure at least one first random access occasion and at least one second random access occasion, the first random access occasion being located in a downlink full-duplex (SBFD) symbol, and the second random access occasion being located in other symbols, or the first random access occasion being located in an SBFD symbol, and the second random access occasion being located in a non-SBFD symbol; and sending a random access request using a first target random access occasion, the first target random access occasion being the first random access occasion or the second random access occasion. In this embodiment, the network device configures two types of random access occasions, i.e., the first random access occasion and the second random access occasion, for the terminal device through the RACH configuration information, so that the terminal device selects a target access occasion from the two types of random access occasions to perform random access, thereby completing random access in the SBFD scenario.

[0009] Optionally, the first random access occasion and the second random access occasion are numbered in an association mode period to obtain a first number set, the first number set being used to determine the first target random access occasion; or the first random access occasion and the second random access occasion are numbered in the association mode period to obtain a second number set, the second number set being used to determine the first target random access occasion, a first number of consecutive numbers in the second number set indicating the second random access occasion, and the remaining consecutive numbers in the second number set indicating the first random access occasion. The present application embodiment numbers the first random access occasion and the second random access occasion uniformly to obtain the same number set, so as to determine the target access occasion by the terminal device.

[0010] Optionally, the RACH configuration information comprises a random access occasion list and / or a channel state information reference signal (CSI-RS) resource list, the random access occasion list comprises an index of the first random access occasion and an index of the second random access occasion, and the CSI-RS resource list comprises an index of a first CSI-RS resource associated with the index of the first random access occasion and an index of a second CSI-RS resource associated with the index of the second random access occasion.

[0011] Optionally, the communication method further comprises: numbering the first random access occasion and the second random access occasion respectively in an association mode period to obtain a third number set and a fourth number set, and the third number set and the fourth number set are used to determine the first target random access occasion. Embodiments of the present application number the first random access occasion and the second random access occasion respectively to obtain different number sets for the terminal device to determine the target access occasion.

[0012] Optionally, the RACH configuration information comprises a CSI-RS resource list and a random access occasion list, the random access occasion list comprises a first random access occasion list or a second random access occasion list, the CSI-RS resource list comprises an index of a CSI-RS resource, the first random access occasion list comprises an index of the first random access occasion, the second random access occasion list comprises an index of the second random access occasion, and the CSI-RS resource is associated with the index of the first random access occasion or the index of the second random access occasion.

[0013] Optionally, the RACH configuration information comprises a first CSI-RS resource list and a second CSI-RS resource list, the first CSI-RS resource list comprises an index of a third CSI-RS resource, the second CSI-RS resource list comprises an index of a fourth CSI-RS resource, the third CSI-RS resource is associated with the index of the first random access occasion, and the fourth CSI-RS resource is associated with the index of the second random access occasion.

[0014] Optionally, the communication method further comprises: receiving first information, the first information indicating the first random access occasion or the second random access occasion for contention-free random access (CFRA). Embodiments of the present application indicate one random access occasion, for example, the first random access occasion or the second random access occasion, for CFRA by the first information, so that the terminal device determines the target access occasion.

[0015] Optionally, the communication method further includes: receiving information of a first physical random access (PRACH) mask, the first PRACH mask being used to determine a candidate random access occasion in the first random access occasion and / or the second random access occasion, the candidate random access occasion including the first target random access occasion. The embodiment of the application configures the first random access occasion and the second random access occasion to use the same PRACH mask, which can be compatible with the existing protocol.

[0016] Optionally, the communication method further includes: receiving second information, the second information indicating that the first PRACH mask is used for the first random access occasion and / or the second random access occasion.

[0017] Optionally, the communication method further includes: receiving information of a second PRACH mask and information of a third PRACH mask, the second PRACH mask being used to determine a first candidate random access occasion in the first random access occasion, the third PRACH mask being used to determine a second candidate random access occasion in the second random access occasion, the first candidate random access occasion or the second candidate random access occasion including the first target random access occasion. The embodiment of the application configures the first random access occasion and the second random access occasion to use different PRACH masks.

[0018] Optionally, the communication method further includes: receiving third information, the third information indicating that the first target random access occasion is the first random access occasion or the second random access occasion. In the embodiment, the network device can indicate the type of available random access occasion in PDCCH signaling, which realizes the flexibility of random access occasion selection.

[0019] Optionally, the communication method further includes: mapping, in each association period, a synchronization signal block (SSB) to the at least one first random access occasion; and mapping, in each association period, a corresponding number of SSBs in an SSB period to the at least one second random access occasion. For the first random access occasion and the second random access occasion, in each association period, the mapping of the SSBs to the random access occasions is performed according to different mapping rules, so as to ensure that the first random access occasion is fully utilized and the communication efficiency is improved.

[0020] Optionally, the communication method further comprises: mapping a corresponding number of SSBs in an SSB period to the at least one first random access occasion in a first association period corresponding to the first random access occasion; and mapping a corresponding number of SSBs in an SSB period to the at least one second random access occasion in a second association period corresponding to the second random access occasion. Different association periods are configured for the first random access occasion and the second random access occasion, and the mapping of SSBs to random access occasions is performed according to the same mapping rule, so as to fully utilize the first random access occasion and improve communication efficiency.

[0021] Optionally, in the case that the first random access occasion and the second random access occasion correspond to different association periods, the association period corresponding to the first random access occasion repeats according to an association pattern period; and in the case that the first random access occasion and the second random access occasion correspond to the same association period, the association period corresponding to the first random access occasion does not completely repeat according to the association pattern period. The association period corresponding to the first random access occasion and the second random access occasion can repeat or not completely repeat according to an association pattern period, so as to flexibly adapt to different application scenarios.

[0022] Optionally, the communication method further comprises: retransmitting the random access request using a second target random access occasion, wherein in the case that first RACH configuration information used for determining the first target random access occasion is different from second RACH configuration information used for determining the second target random access occasion, a higher layer is notified to suspend a power counter, a count of the power counter being used to determine a transmission power of the random access request; or in the case that a symbol type of the first target random access occasion is different from a symbol type of the second target random access occasion, the higher layer is notified to suspend the power counter, the symbol type including a sub-band full duplex symbol or a non-sub-band full duplex symbol; or in the case that a type of the first target random access occasion is different from a type of the second target random access occasion, the higher layer is notified to suspend the power counter. The embodiments of the present application can determine whether to lift the transmission power in combination with the type of the random access occasion in which the random access request is retransmitted, so as to ensure the success rate of the random access request transmission, and further improve the random access success rate.

[0023] Optionally, the communication method further comprises: receiving fourth information indicating a preamble range corresponding to the first random access occasion, the random access request including a target preamble, and the preamble range being used to determine the target preamble. The embodiments of the present application configure corresponding preamble ranges for the first random access occasion and the second random access occasion, so as to be used by a terminal device in random access.

[0024] Optionally, the preamble range comprises a preamble start index and a length.

[0025] Optionally, the communication method further comprises: counting the first random access occasion using a first power counter, wherein the first target random access occasion is the first random access occasion, and a count of the first power counter is used to determine a transmission power of the random access request; or counting the second random access occasion using a second power counter, wherein the first target random access occasion is the second random access occasion, and a count of the second power counter is used to determine the transmission power of the random access request.

[0026] In a second aspect, the present application provides a communication method, comprising: sending RACH configuration information, the RACH configuration information being used to configure at least one first random access occasion and at least one second random access occasion, the first random access occasion being located in a downlink SBFD symbol, and the second random access occasion being located in other symbols, or the first random access occasion being located in an SBFD symbol, and the second random access occasion being located in a non-SBFD symbol; and receiving a random access request using a first target random access occasion, the first target random access occasion being the first random access occasion or the second random access occasion.

[0027] Optionally, the communication method further comprises: sending first information, the first information indicating the first random access occasion or the second random access occasion for non-contention random access.

[0028] Optionally, the communication method further comprises: sending a first PRACH mask, the first PRACH mask being used to determine a candidate random access occasion in the first random access occasion and / or the second random access occasion, the candidate random access occasion comprising the first target random access occasion.

[0029] Optionally, the communication method further comprises: sending second information, the second information indicating that the first PRACH mask is used for the first random access occasion and / or the second random access occasion.

[0030] Optionally, the communication method further comprises: sending a second PRACH mask and a third PRACH mask, the second PRACH mask being used to determine a first candidate random access occasion in the first random access occasion, and the third PRACH mask being used to determine a second candidate random access occasion in the second random access occasion, the first candidate random access occasion and the second candidate random access occasion comprising the first target random access occasion.

[0031] Optionally, the communication method further comprises: sending third information, the third information indicating that the first target random access occasion is the first random access occasion or the second random access occasion.

[0032] Optionally, in a case where the first random access occasion and the second random access occasion correspond to different association periods, the association period corresponding to the first random access occasion repeats according to an association mode period; in a case where the first random access occasion and the second random access occasion correspond to the same association period, the association period corresponding to the first random access occasion does not completely repeat according to the association mode period.

[0033] Optionally, the communication method further comprises: sending fourth information, the fourth information indicating a preamble range corresponding to the second random access occasion, the random access request comprising a target preamble, and the preamble range being used to determine the target preamble.

[0034] In a third aspect, the present application further discloses a communication device, comprising: a communication module, configured to receive RACH configuration information, the RACH configuration information being used to configure at least one first random access occasion and at least one second random access occasion, the first random access occasion being located in a downlink SBFD symbol, and the second random access occasion being located in other symbols, or the first random access occasion being located in an SBFD symbol, and the second random access occasion being located in a non-SBFD symbol; and the communication module is further configured to send a random access request using a first target random access occasion, the first target random access occasion being the first random access occasion or the second random access occasion.

[0035] In a fourth aspect, the present application further discloses a communication device, comprising: a communication module, configured to send RACH configuration information, the RACH configuration information being used to configure at least one first random access occasion and at least one second random access occasion, the first random access occasion being located in a downlink SBFD symbol, and the second random access occasion being located in other symbols, or the first random access occasion being located in an SBFD symbol, and the second random access occasion being located in a non-SBFD symbol; and the communication module is further configured to receive a random access request using a first target random access occasion, the first target random access occasion being the first random access occasion or the second random access occasion.

[0036] In a fifth aspect, a computer readable storage medium is provided, and the computer readable storage medium stores a computer program, the computer program being run by a processor to execute any one of the methods provided in the first aspect or the second aspect.

[0037] In a sixth aspect, a communication apparatus is provided, which includes a memory and a processor, and the memory stores a computer program executable by the processor, and the processor executes the computer program to perform any of the methods provided in the first aspect.

[0038] In a seventh aspect, a communication apparatus is provided, which includes a memory and a processor, and the memory stores a computer program executable by the processor, and the processor executes the computer program to perform any of the methods provided in the second aspect.

[0039] In an eighth aspect, a computer program product is provided, which stores a computer program, and the computer program is executed by a processor to perform any of the methods provided in the first aspect or the second aspect.

[0040] In a ninth aspect, a communication system is provided, which includes the terminal device and the network device.

[0041] In a tenth aspect, the embodiments of the present application further provide a chip (or a data transmission apparatus), which stores a computer program, and when the computer program is executed by the chip, the steps of the above method are implemented.

[0042] In an eleventh aspect, the embodiments of the present application further provide a system chip applied to a terminal, and the chip system includes at least one processor and an interface circuit, the interface circuit and the at least one processor are interconnected through a line, and the at least one processor is used to execute instructions to perform any of the methods provided in the first aspect or the second aspect. BRIEF DESCRIPTION OF DRAWINGS

[0043] FIGS. 1-4 are schematic diagrams of different SBFD scenarios;

[0044] FIG. 5 is an interaction flow diagram of a communication method provided by the embodiments of the present application;

[0045] FIG. 6 is an interaction flow diagram of another communication method provided by the embodiments of the present application;

[0046] FIG. 7 is an interaction flow diagram of another communication method provided by the embodiments of the present application;

[0047] FIG. 8 is a schematic diagram of a specific application scenario provided by the embodiments of the present application;

[0048] FIG. 9 is an interaction flow diagram of another communication method provided by the embodiments of the present application;

[0049] FIG. 10 is a structural schematic diagram of a communication apparatus provided by the embodiments of the present application;

[0050] FIG. 11 is a hardware structural schematic diagram of a communication apparatus provided by the embodiments of the present application. DETAILED DESCRIPTION

[0051] The communication system to which embodiments of the present application are applicable includes, but is not limited to, a Long Term Evolution (LTE) system, a 5th-Generation (5G) system, a New Radio (NR) system, and a future evolution system or a multi-communication convergence system. The 5G system can be a 5G Non-Stand Alone (NSA) system or a 5G Stand Alone (SA) system. The technical solutions of the present application are also applicable to different network architectures, including but not limited to a relay network architecture, a dual connectivity architecture, a Vehicle-to-Everything (V2X) architecture, and the like.

[0052] The present application mainly relates to communication between a terminal device and a network device. Among them:

[0053] The network device in the embodiments of the present application can also be referred to as an access network device, for example, a base station (BS) (also referred to as a base station device). The network device is a device deployed in a radio access network (RAN) to provide wireless communication functions. For example, devices providing base station functions in a second-generation (2nd-Generation, 2G) network include base transceiver stations (BTS), devices providing base station functions in a third-generation (3rd-Generation, 3G) network include NodeB, devices providing base station functions in a fourth-generation (4th-Generation, 4G) network include evolved NodeB (eNB), in a wireless local area network (WLAN), the device providing the base station function is an access point (Access Point, AP), in the NR, the device providing the base station function is a next generation Node Base station (gNB), and a continuously evolved NodeB (ng-eNB), wherein the gNB and the terminal device communicate with each other using NR technology, the ng-eNB and the terminal device communicate with each other using evolved universal terrestrial radio access (E-UTRA) technology, and the gNB and the ng-eNB can be connected to a 5G core network. The network device in the embodiments of the present application also includes devices providing base station functions in future new communication systems, etc.

[0054] The terminal equipment in the embodiments of the present application can refer to various forms of access terminals, user units, user stations, mobile stations, mobile stations (Mobile Station, MS), remote stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents or user devices. The terminal equipment can also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal equipment in a future 5G network or a terminal equipment in a future evolved Public Land Mobile Network (PLMN), etc. The embodiments of the present application are not limited thereto. The terminal equipment can also be referred to as user equipment (User Equipment, UE), terminal, etc.

[0055] As described in the background, in the SBFD scenario, the RO can be located in the downlink symbol, the downlink symbol or the flexible symbol, and how to perform random access for different ROs is a technical problem to be solved.

[0056] In the technical solution of the present application, the network device configures two types of random access occasions for the terminal equipment, i.e. the first random access occasion and the second random access occasion, for the terminal equipment to select a target access occasion from them to perform random access, thereby completing random access in the SBFD scenario.

[0057] In the embodiments of the present application, the network device can configure the downlink symbol, the flexible symbol or the uplink symbol through high layer signaling (for example, TDD-UL-DL-ConfigCommon), and configure the time domain position of the SBFD through another high layer signaling. For example, the position of the SBFD symbol can be directly configured, the position of the non-SBFD symbol can be directly configured, or the positions of the SBFD symbol and the non-SBFD symbol can be configured.

[0058] The random access occasion referred to in the embodiments of the present application can also be referred to as a random access channel occasion, a random access time, a random access channel time, etc., which is not limited in the present application.

[0059] The downlink SBFD symbol in the embodiments of the present application refers to a symbol configured as a downlink symbol by a higher layer signaling and configured as an SBFD symbol by another higher layer signaling. Each symbol in slot1 and slot2 in FIG. 2 is a downlink SBFD symbol.

[0060] The flexible SBFD symbol in the embodiments of the present application refers to a symbol configured as a flexible symbol by a higher layer signaling and configured as an SBFD symbol by another higher layer signaling. Each symbol in slot3 in FIG. 2 is a flexible SBFD symbol.

[0061] The non-SBFD symbol in the embodiments of the present application can include a downlink non-SBFD symbol and a flexible non-SBFD symbol. The non-SBFD symbol refers to a symbol configured as a downlink symbol or a flexible symbol by a higher layer signaling and not configured as an SBFD symbol by another higher layer signaling. Each symbol in slot0 in FIG. 2 is a downlink non-SBFD symbol.

[0062] The uplink symbol in the embodiments of the present application refers to a symbol configured as an uplink symbol by a higher layer signaling and not configured as an SBFD symbol by another higher layer signaling. Each symbol in slot4 in FIG. 2 is an uplink symbol.

[0063] In the embodiments of the present application, the random access occasion can include two types, that is, a first random access occasion (also referred to as an additional RO) and a second random access occasion (also referred to as a legacy RO). The second random access occasion refers to an RO valid for a traditional terminal device (a non-SBFD aware terminal device), and the first random access occasion refers to an RO invalid for the traditional terminal device but valid for an SBFD aware terminal device.

[0064] [Corrected according to Rule 91 on 09.09.2025] For example, all or the starting position of the first random access occasion is located in a downlink SBFD symbol, and all or the starting position of the second random access occasion is located in another symbol. For example, as shown in FIG. 2 and FIG. 3, slot0 includes a downlink symbol, slot1 and slot2 include downlink SBFD symbols, slot3 includes a flexible SBFD symbol, and slot4 includes an uplink symbol; wherein RO-1 is a first random access occasion located in a downlink SBFD symbol, RO-2 is a second random access occasion located in a flexible SBFD symbol, and RO-3 is a second random access occasion located in an uplink symbol. Slot3 can include a downlink symbol, an uplink symbol, and a flexible symbol, that is, X, the flexible symbol can be used for downlink or uplink transmission, or can be used as a switching time for switching from downlink transmission to uplink transmission.

[0065] In the SBFD scenario, two random access channel (RACH) configurations can be indicated: Option 1 and Option 2. In Option 1, a single RACH configuration is used, and only single RACH configuration related parameters are based on. In Option 2, two independent RACH configurations are utilized to configure related parameters, including a legacy RACH configuration and an additional RACH configuration.

[0066] [According to Rule 91 correction 09.09.2025] In Option 1, the second random access occasion refers to the ROs that are in the uplink symbol or flexible symbol (see RO-2 and RO-3 in FIG. 2 and FIG. 3 for details). The first random access occasion refers to the ROs that are in the uplink sub-band corresponding to the downlink symbol (see RO-1 in FIG. 2 and FIG. 3 for details).

[0067] In Option 2, the second random access occasion refers to the ROs configured by the legacy RACH configuration, and the first random access occasion refers to the ROs configured by the additional RACH configuration.

[0068] [According to Rule 91 correction 09.09.2025] For example, as shown in FIG. 4, slot0 includes a downlink symbol, slot1 and slot2 include downlink SBFD symbols, slot3 includes a flexible SBFD symbol, and slot4 includes an uplink symbol; wherein RO-1 is the first random access occasion, configured by the additional RACH configuration, and RO-4 is the second random access occasion, configured by the legacy RACH configuration.

[0069] To make the above objectives, features and advantages of the present application more obvious and easy to understand, specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0070] Referring to FIG. 5, the method provided by the present application specifically includes steps 501 and 502.

[0071] Step 501, the network device sends RACH configuration information to the terminal device. Correspondingly, the terminal device receives the RACH configuration information. The RACH configuration information is used to configure at least one first random access occasion and at least one second random access occasion. More details about the first random access occasion and the second random access occasion can be referred to the foregoing embodiments, which will not be described here.

[0072] Step 502, the terminal device sends a random access request using a first target random access occasion. The first target random access occasion is the first random access occasion or the second random access occasion.

[0073] It should be noted that the serial numbers of the steps in the embodiment do not represent the limitation of the execution order of the steps.

[0074] It can be understood that, in a specific implementation, the communication method can be implemented in the form of a software program running in a processor integrated in a chip or a chip module. The method can also be implemented in the form of software combined with hardware, and the present application does not make any limitation.

[0075] In the embodiment, the network device configures two types of random access occasions for the terminal device through the RACH configuration information, that is, the first random access occasion and the second random access occasion, so that the terminal device selects a target access occasion from the random access occasions to perform random access, thereby completing random access in the SBFD scenario.

[0076] Embodiment 1, the present embodiment uniformly numbers the first random access occasion and the second random access occasion to obtain a same number set, so as to determine the target access occasion for the terminal device.

[0077] The present embodiment provides a non-contention random access (CFRA) based on a channel state information (CSI) reference signal (RS), and a solution for determining a target random access occasion in an SBFD scenario.

[0078] In the embodiment, the RACH configuration information includes a random access occasion list (RA-OccasionList) and a CSI-RS resource list. Each CSI-RS resource in the CSI-RS resource list is associated with at least one random access occasion list, and the random access occasion list includes an index of the first random access occasion and an index of the second random access occasion. The CSI-RS resource list includes an index of a first CSI-RS resource associated with the index of the first random access occasion and an index of a second CSI-RS resource associated with the index of the second random access occasion.

[0079] Specifically, the CSI-RS transmitted by the CSI-RS resource can be used to measure a beam, and the CSI-RS resource is associated with a random access occasion, which can be used by the terminal device when selecting the beam measured by the CSI-RS resource to perform a random access request. The index of each CSI-RS resource is associated with at most 64 indexes of random access occasions. The 64 random access occasions can only include the first random access occasion, only include the second random access occasion, or include both the first random access occasion and the second random access occasion. When there are multiple random access occasions, the terminal device randomly selects one. The indexes of the random access occasions indicated by the random access occasion list are reset according to an association pattern period.

[0080] In one non-limiting embodiment, the CSI-RS resource list can also include indexes of CSI-RS resources for SBFD and indexes of CSI-RS resources for non-SBFD.

[0081] In this embodiment, the terminal device can determine a number set of random access occasions, and the terminal device determines a target access occasion according to the number set of random access occasions.

[0082] In one specific implementation, the terminal device numbers the first random access occasions and the second random access occasions in an association pattern period to obtain a first number set.

[0083] Specifically, the terminal device numbers the first random access occasions and the second random access occasions in the same association pattern period uniformly without distinguishing the first random access occasions and the second random access occasions to obtain the first number set. The total number of numbers in the first number set represents the number of the first random access occasions and the second random access occasions.

[0084] In one specific implementation, the terminal device can number the first random access occasions and the second random access occasions in the following order:

[0085] First, each random access occasion is sequentially numbered in the ascending order of the frequency resource index of the frequency-multiplexed first random access occasion and second random access occasion; second, the first random access occasion and the second random access occasion are numbered in the ascending order of the time resource index of the time-multiplexed first random access occasion and second random access occasion in the time slot where the PRACH is located; and third, the first random access occasion and the second random access occasion are numbered in the ascending order of the index of the time slot where the PRACH is located.

[0086] In another specific embodiment, the terminal device numbers the first random access occasions and the second random access occasions in a same association mode period to obtain a second number set. In the second number set, a first number of consecutive numbers indicate the second random access occasions, and the remaining consecutive numbers indicate the first random access occasions. That is, the numbers of the first random access occasions are located after the numbers of the second random access occasions.

[0087] Specifically, the terminal device numbers the first random access occasions and the second random access occasions in a same association mode period, and by locating the numbers of the first random access occasions after the numbers of the second random access occasions, the numbering order of the second random access occasions and the use of the second random access occasions are not affected. In addition, the first random access occasions and the second random access occasions can be distinguished by the numbering order in the second number set.

[0088] For example, the second number set includes 200 numbers, in which numbers 1-100 indicate the second random access occasions, and numbers 101-200 indicate the first random access occasions.

[0089] In this embodiment, after obtaining the first number set or the second number set, the terminal device can perform mapping of SSBs to the first random access occasions and the second random access occasions according to the numbers of the first random access occasions and the numbers of the second random access occasions in the first number set or the second number set, and select a random access occasion from the random access occasions that have completed mapping with SSBs as a first target random access occasion for random access.

[0090] In one specific embodiment, the terminal device can number the first random access occasions or the second random access occasions in the following order:

[0091] First, the first random access occasions and the second random access occasions are numbered in an ascending order of frequency resource indexes of the first random access occasions and the second random access occasions in frequency multiplexing; second, the first random access occasions and the second random access occasions are numbered in an ascending order of time resource indexes of the first random access occasions and the second random access occasions in time division multiplexing within a time slot where PRACH is located; and third, the first random access occasions and the second random access occasions are numbered in an ascending order of indexes of time slots where PRACH is located.

[0092] The embodiments of the present application can be applied to option 1 in the foregoing embodiments.

[0093] Embodiment 2, the embodiments of the present application number the first random access occasions and the second random access occasions respectively to obtain different number sets for the terminal device to determine a target access occasion.

[0094] In one non-limiting embodiment, the RACH configuration information includes a CSI-RS resource list, a first random access occasion list and a second random access occasion list. The CSI-RS resource list includes indexes of CSI-RS resources; the first random access occasion list includes indexes of first random access occasions, and the second random access occasion list includes indexes of second random access occasions. A CSI-RS resource is associated with an index of a first random access occasion or an index of a second random access occasion.

[0095] In this embodiment, each CSI-RS resource in the CSI-RS resource list is associated with two random access occasion lists, i.e., a first random access occasion in the first random access occasion list and a second random access occasion in the second random access occasion list are corresponded by one CSI-RS resource list. This means that the SBFD scenario and the non-SBFD scenario can share the same CSI-RS resource.

[0096] In one non-limiting embodiment, the RACH configuration information includes a first CSI-RS resource list and a second CSI-RS resource list. The first CSI-RS resource list includes indexes of third CSI-RS resources and a first random access occasion list, and the second CSI-RS resource list includes indexes of fourth CSI-RS resources and a second random access occasion list. The third CSI-RS resource is associated with an index of a first random access occasion, and the fourth CSI-RS resource is associated with an index of a second random access occasion.

[0097] The index of the third CSI-RS resource and the index of the fourth CSI-RS resource can be the same or different.

[0098] Compared with the foregoing embodiment of configuring one CSI-RS resource list, this embodiment configures two CSI-RS resource lists, i.e., a first CSI-RS resource list and a second CSI-RS resource list, which are respectively associated with an index of a first random access occasion and an index of a second random access occasion.

[0099] In this embodiment, the terminal device can determine a number set of random access occasions, and the terminal device determines a target access occasion according to the number set of random access occasions.

[0100] In one specific embodiment, the terminal device numbers the first random access occasions and the second random access occasions respectively to obtain a third number set and a fourth number set within an association mode period. The number of numbers in the third number set represents the number of first random access occasions, and the number of numbers in the fourth number set represents the number of second random access occasions.

[0101] That is, the index of the third number set corresponds to the first random access occasion, and the index of the fourth number set corresponds to the second random access occasion.

[0102] The embodiment of the present application numbers the first random access occasion and the second random access occasion respectively, which helps the SBFD-aware terminal device and the non-SBFD-aware terminal device to determine the CFRA resource applicable to each of them.

[0103] The embodiment of the present application can be applied to options 1 and 2 in the foregoing embodiments.

[0104] It should be noted that the specific way of obtaining the first number set to the fourth number set through numbering can refer to the prior art, which will not be repeated here.

[0105] Embodiment 3, the embodiment of the present application indicates one random access occasion for CFRA, such as the first random access occasion or the second random access occasion, through the first information, so that the terminal device determines the target access occasion.

[0106] In the embodiment, the terminal device can determine the available random access occasion for non-contention random access by performing step 601 shown in FIG. 6, and the terminal device determines the target access occasion in the available random access occasion.

[0107] Step 601, the network device sends the first information to the terminal device. Correspondingly, the terminal device receives the first information. The first information indicates the first random access occasion or the second random access occasion for non-contention random access.

[0108] For example, the first information indicates that the random access occasion for non-contention random access is the first random access occasion, then the terminal device numbers the first random access occasion according to the existing manner, to obtain the third number set mentioned in the foregoing embodiment 2, and the terminal device determines the target access occasion according to the third number set.

[0109] For example, the first information indicates that the random access occasion for non-contention random access is the second random access occasion, then the terminal device numbers the second random access occasion according to the existing manner, to obtain the fourth number set mentioned in the foregoing embodiment 2, and the terminal device determines the target access occasion according to the fourth number set.

[0110] The embodiment of the present application can be applied to option 2 in the foregoing embodiments.

[0111] Embodiment 4, the embodiment of the present application configures the first random access occasion and the second random access occasion to use the same PRACH mask (mask), which can be compatible with the existing protocol.

[0112] Please refer to FIG. 7, which shows a flow of a communication method. The communication method includes step 701 and step 702.

[0113] In step 701, the network device sends information of a first PRACH mask to the terminal device. Accordingly, the terminal device receives the first PRACH mask. The first PRACH mask is used to determine a candidate random access occasion in a first random access occasion and / or a second random access occasion. The terminal device can select a first target random access occasion from the candidate random access occasion to send a random access request.

[0114] In this embodiment, the network device configures a PRACH mask for the terminal device. The PRACH mask can be used only in the first random access occasion, only in the second random access occasion, or in both the first random access occasion and the second random access occasion.

[0115] Specifically, the information of the first PRACH mask can be an index of the first PRACH mask, which points to the first PRACH mask.

[0116] In step 702, the network device sends second information to the terminal device. Accordingly, the terminal device receives the second information. The second information indicates that the first PRACH mask is used in the first random access occasion and / or the second random access occasion.

[0117] In this embodiment, the network device indicates the random access occasion to which the first PRACH mask is applied through the second information, which can improve the flexibility of the PRACH mask.

[0118] In one specific embodiment, in a CFRA scenario, the network device can use a PRACH mask, for example, an index indicating the PRACH mask (ra-ssb-OccasionMaskIndex) to configure the random access occasions available to different terminal devices. For example, the index of 16 PRACH masks can be indicated by 4 bits, including the following types: all random access occasions are available, even-numbered random access occasions are available, odd-numbered random access occasions are available, or a certain numbered random access occasion is available (number range 1-8). The index of the PRACH mask takes effect separately for the index of each synchronization signal block (SSB). When one SSB is associated with multiple random access occasions, the multiple random access occasions are numbered in the manner described in the foregoing embodiments. One SSB is associated with up to 8 random access occasions, so the number of random access occasions is at most 8. After each transmission SSB is mapped with a random access occasion, the number of random access occasions is reset. That is, the number is renumbered from 1 in the next association period. That is, the random access occasions applicable to the index of the PRACH mask are not a group of random access occasions, but multiple groups of random access occasions in multiple association periods.

[0119] The association period, which can also be referred to as a mapping cycle, is a period in which at least one round of mapping of SSBs to random access occasions is completed, so that each actually transmitted SSB is mapped to at least one random access occasion.

[0120] Embodiment 5, the present embodiment configures different PRACH masks for the first random access occasion and the second random access occasion.

[0121] In the present embodiment, the network device sends information of a second PRACH mask and information of a third PRACH mask to the terminal device. The second PRACH mask is used to determine a first candidate random access occasion in the first random access occasion, and the third PRACH mask is used to determine a second candidate random access occasion in the second random access occasion.

[0122] Compared with the prior art, the present application needs to add a second PRACH mask for the first random access occasion.

[0123] For example, the second PRACH mask can be used for the random access occasion located in the downlink SBFD symbol in option 1.

[0124] For example, the second PRACH mask can be used for the random access occasion configured by the additional RACH configuration in option 2.

[0125] More implementation manners about the second PRACH mask and the third PRACH mask can refer to the description of the first PRACH mask in the foregoing embodiment 5, which will not be described here again.

[0126] In the scenario of random access triggered by physical downlink control channel (PDCCH) signaling, the network device can indicate the type of available random access occasions in the PDCCH signaling.

[0127] In this embodiment, the network device sends third information to the terminal device. Correspondingly, the terminal device receives the third information. The third information indicates that the first target random access occasion is the first random access occasion or the second random access occasion.

[0128] For example, the third information can directly indicate the first random access occasion or the second random access occasion.

[0129] For example, in the option 2 scenario, the third information can also indicate the type of RACH configuration, such as a traditional RACH configuration or an additional RACH configuration, to indirectly indicate the first random access occasion or the second random access occasion.

[0130] For example, the third information includes information of a first mapping configuration or information of a second mapping configuration, where the first mapping configuration is used to configure the mapping between the first random access occasion and the SSB, and the second mapping configuration is used to configure the mapping between the second random access occasion and the SSB. For example, the third information includes an identifier of the first mapping configuration, indicating that the terminal device can use the first random access occasion for random access.

[0131] In one implementation manner, the third information can be carried in a reserved bit in the PDCCH signaling.

[0132] In another implementation manner, in the case where there is no reserved bit in the PDCCH signaling, the terminal device can determine the first target random access occasion according to the last received symbol of the PDCCH signaling and a preset threshold, where the time interval between the first transmitted symbol of the first target random access occasion and the last received symbol of the PDCCH signaling is greater than the preset threshold. At this time, the first target random access occasion can be the first random access occasion, or can be the second random access occasion.

[0133] It should be noted that the preset threshold can be determined according to actual processing time, delay and other factors, which are not limited in the present application.

[0134] Specifically, the PDCCH signaling is a downlink control information (DCI) of a cell radio network temporary identity (C-RNTI) scrambled format 1_0, and a frequency domain resource assignment field thereof is all 1. Some parameters for the terminal device to perform random access are informed through other fields in the PDCCH signaling, for example, an uplink indication field (UL / SUL indicator) indicates a carrier for random access, a random access preamble index field (Random Access Preamble index) indicates a preamble index when performing random access; a synchronization signal block field (SS / PBCH index) indicates an SSB corresponding to the terminal device; and a PRACH mask index field (PRACH Mask index) indicates a random access occasion associated with the SSB.

[0135] In the case of triggering random access by the PDCCH order, the terminal device sends the PRACH in the selected first target random access occasion.

[0136] In embodiment 7, for the first random access occasion and the second random access occasion, in each association period, the mapping of the SSB to the random access occasion is performed according to different mapping rules, so as to fully utilize the first random access occasion and improve the communication efficiency.

[0137] In this embodiment, in each association period, the terminal device maps the SSB to the at least one first random access occasion. That is, when the terminal device maps the SSB to the first random access occasion, it does not need to consider the number of SSBs in the SSB period, and as long as there is a remaining first random access occasion, the mapping of the SSB to the first random access occasion can be performed.

[0138] In each association period, the terminal device maps a corresponding number of SSBs in the SSB period to the at least one second random access occasion. That is, when the terminal device maps the SSB to the second random access occasion, it needs to consider the number of SSBs in the SSB period, so that each actually transmitted SSB is mapped to at least one second random access occasion.

[0139] Specifically, the association period is an integer multiple of the PRACH configuration period. Wherein, the association period is calculated from radio frame 0. Within one association period, after completing a round of SSB to random access occasion mapping, the next round of mapping is continued until the remaining random access occasions are insufficient to complete a round of SSB to random access occasion mapping. If the remaining random access occasions are insufficient to complete a round of SSB to random access occasion mapping, the remaining random access occasions are an invalid random access occasion set. All random access occasions within the invalid random access occasion set cannot be associated to SSBs, nor can be used for PRACH transmission.

[0140] [Corrected according to Rule 91 on 09.09.2025] Taking the example of mapping a corresponding number of SSBs within an SSB period to the second random access occasion, the PRACH configuration period is 10 ms, the uplink-downlink switching period is 4 ms, the SSB period is 80 ms, the association period of SSB mapping to RO is 10 ms, 20 ms and 40 ms, and the association mode period of SSB mapping to the second random access occasion is 160 ms (indicating that every 160 ms, the association period of SSB mapping to the second random access occasion repeats once). The actual number of SSBs transmitted within an SSB period is NSSB=8, and the even-numbered and odd-numbered PRACH configuration periods contain 8 and 6 valid ROs, respectively. There are 0 valid ROs in the PRACH configuration period containing SSBs. As shown in FIG. 8, the association mode period (160 ms) is composed of 6 association periods (specifically, please refer to the parts with different hatched fillings in FIG. 8, i.e., association period 1-association period 6). Within the first 150 ms (corresponding to radio frames numbered 0-14), the 6 association periods include 4, 1, 2, 4, 2 and 2 PRACH configuration periods in turn, respectively, which are represented by different hatched fillings; the last 10 ms (corresponding to radio frame numbered 15) is an odd-numbered radio frame, which can only map 6 SSBs, so it cannot map all 8 SSBs. Therefore, the 6 second random access occasions form an invalid random access occasion set, and all 6 second random access occasions in the invalid random access occasion set cannot be mapped by SSBs, nor can be used for PRACH transmission. Radio frame 3 in association period 1 is an odd-numbered radio frame, which has 6 second random access occasions, but according to the definition of the association period of SSB mapping to RO, the total number of valid random access occasions in radio frames 0, 1, 2 and 3 must be a multiple of 8, so radio frame 3 can only have 2 valid second random access occasions; similarly, radio frames 6 and 14 have only 2 valid second random access occasions, and radio frame 10 in association period 4 has only 4 valid second random access occasions.

[0141] Embodiment 8, for the first random access occasion and the second random access occasion, different association periods are configured respectively, and the mapping of the SSB and the random access occasion is performed according to the same mapping rule, so as to ensure full use of the first random access occasion and improve communication efficiency.

[0142] In this embodiment, the first random access occasion is configured with a first association period, and the second random access occasion is configured with a second association period.

[0143] In the first association period, a corresponding number of SSBs in the SSB period are mapped to at least one first random access occasion; in the second association period, a corresponding number of SSBs in the SSB period are mapped to at least one second random access occasion.

[0144] Embodiment 9, for the first random access occasion and the second random access occasion, the association period can be repeated or not completely repeated according to the association pattern period, so as to flexibly adapt to different application scenarios.

[0145] This embodiment can be divided into two cases according to whether the first random access occasion and the second random access occasion correspond to different association periods: case 11 and case 12.

[0146] Case 11, in the case that the association period corresponding to the first random access occasion is different from the association period corresponding to the second random access occasion, the association period corresponding to the first random access occasion is repeated according to the association pattern period. The association pattern period represents the time domain repetition period of the association period; the association period is repeated according to the association pattern period means that the mapping relationship between the SSB and the first random access occasion is completely the same between different association pattern periods.

[0147] For example, the association pattern period is 160ms, the first random access occasion corresponds to the association period 1, and in the association period 1, the mapping relationship between the first random access occasion and the SSB is that one SSB is mapped to four first random access occasions. Therefore, in the case that the association period is repeated according to the association pattern period, the mapping relationship is repeated at a time interval of 160ms.

[0148] In this embodiment, the first random access occasion and the second random access occasion have independent association periods respectively, and the association period corresponding to the first random access occasion is repeated according to the association pattern period, so as to ensure the mapping of the SSB to the first random access occasion.

[0149] Case 12, in the case that the first random access occasion and the second random access occasion correspond to the same association period, the association period corresponding to the first random access occasion does not completely repeat according to the association mode period. Wherein, the association period does not completely repeat according to the association mode period refers to that the mapping relationship between the SSB and the first random access occasion is not completely the same between different association mode periods. For example, the mapping relationship between the SSB and the first random access occasion can be partially the same and partially different between different association mode periods.

[0150] For example, the association mode period is 160ms, the first random access occasion corresponds to the association period 1, and the mapping relationship between the first random access occasion and the SSB in the association period 1 is that one SSB is mapped to 4 first random access occasions. Then, in the case that the association period does not completely repeat according to the association mode period, the mapping relationship is repeated in the first 160ms time interval, and the mapping relationship between the first random access occasion and the SSB in the second 160ms time interval can be updated to that one SSB is mapped to 2 first random access occasions.

[0151] Wherein, for the first random access occasion, it does not have an independent association period, and the association period corresponding to the first random access occasion does not completely repeat according to the association mode, so as to ensure the flexibility of the mapping of the SSB to the first random access occasion.

[0152] Wherein, the association mode period represents the time domain repetition period of the association period of the mapping of the SSB to the random access occasion. The maximum value of the association mode period is 160ms.

[0153] For example, the association mode period is 160ms, which means that the association period repeats once every 160ms.

[0154] Embodiment 10, the embodiments of the present application can determine whether to lift the transmission power in combination with the type of the random access occasion of the retransmission random access, so as to ensure the success rate of the random access request transmission, and further improve the random access success rate.

[0155] Specifically, please refer to FIG. 9, which shows a communication method. The communication method comprises steps 901 and 902.

[0156] Step 901, the terminal device transmits a random access request using a first target random access occasion.

[0157] Step 902, the terminal device retransmits the random access request using a second target random access occasion.

[0158] According to the relationship between the first target random access occasion and the second target random access occasion, the terminal device can determine to suspend the counting of the power counter or continue the counting of the power counter. The following will be described in combination with different cases (case 21-case 24).

[0159] The counting of the power counter is used to determine the transmission power of the random access request. Specifically, if the terminal device changes the spatial domain transmission filtering parameter before the PRACH retransmission, the physical layer notifies the high layer to suspend the power counter, or in other words, to suspend the counting of the power counter.

[0160] Case 21, in the case where the first RACH configuration information used to determine the first target random access occasion is different from the second RACH configuration information used to determine the second target random access occasion, the physical layer of the terminal device notifies the high layer to suspend the power counter.

[0161] For example, in the scenario of option 2, the first RACH configuration information is the legacy RACH configuration, and the second RACH configuration information is the additional RACH configuration. The physical layer of the terminal device notifies the high layer to suspend the power counter.

[0162] Case 22, in the case where the symbol type of the first target random access occasion is different from the symbol type of the second target random access occasion, the physical layer of the terminal device notifies the high layer to suspend the power counter.

[0163] For example, the symbol type of the first target random access occasion is the downlink SBFD symbol, and the symbol type of the second target random access occasion is the uplink symbol. The physical layer of the terminal device notifies the high layer to suspend the power counter.

[0164] Case 23, in the case where the type of the first target random access occasion is different from the type of the second target random access occasion, the physical layer of the terminal device notifies the high layer to suspend the power counter.

[0165] Case 24, in the case where the first beam used by the terminal device to send the random access request is different from the second beam used by the terminal device to retransmit the random access request, the physical layer of the terminal device notifies the high layer to suspend the power counter.

[0166] For example, the first target random access occasion is the first random access occasion, and the second target random access occasion is the second random access occasion. The physical layer of the terminal device notifies the high layer to suspend the power counter.

[0167] In other cases, the type of the first target random access occasion is the same as the type of the second target random access occasion, and the power counter continues to count. Specifically, it can include case 31-case 33.

[0168] In a case 31, the first RACH configuration information is the same as the second RACH configuration information, and the first beam used by the terminal device to send the random access request is the same as the second beam used by the terminal device to retransmit the random access request, the power counter continues counting.

[0169] In a case 32, the symbol type of the first target random access occasion is the same as the symbol type of the second target random access occasion, and the first beam is the same as the second beam, the power counter continues counting.

[0170] In a case 33, the type of the first target random access occasion is the same as the type of the second target random access occasion, and the first beam is the same as the second beam, the power counter continues counting.

[0171] It should be noted that the power counter can also be referred to as a power ramping counter, a preamble power ramping counter (PREAMBLE_POWER_RAMPING_COUNTER), etc., which is not limited in the present application.

[0172] In an embodiment 11, different power counters are used to count the first random access occasion and the second random access occasion, respectively.

[0173] In the embodiments of the present application, when the terminal device sends a random access request using the first random access occasion, the terminal device can use the first power counter to count; when the terminal device sends a random access request using the second random access occasion, the terminal device can use the second power counter to count.

[0174] For example, the initial values of the first power counter and the second power counter are both 1; at time T1, the terminal device sends PRACH using the second random access occasion, at this time, the count of the second power counter counter2=1, and the count of the first power counter counter1=1; at time T2, the terminal device sends PRACH using the second random access occasion, at this time, the count of the second power counter counter2=2, and the count of the first power counter counter1=1; at time T3, the terminal device sends PRACH using the first random access occasion, at this time, the count of the first power counter counter1=1, and the count of the second power counter counter2=2; at time T4, the terminal device sends PRACH using the first random access occasion, at this time, the count of the first power counter counter1=2, and the count of the second power counter counter2=2; at time T5, the terminal device sends PRACH using the second random access occasion, at this time, the count of the second power counter counter2=3, and the count of the first power counter counter1=2.

[0175] In one embodiment, the terminal device increments the count of the first power counter when the terminal device transmits a random access request using the first random access occasion and the physical layer of the terminal device does not inform the higher layer to suspend the count of the first power counter. Correspondingly, the terminal device increments the count of the second power counter when the terminal device transmits a random access request using the second random access occasion and the physical layer of the terminal device does not inform the higher layer to suspend the count of the second power counter.

[0176] Specifically, the physical layer of the terminal device informs the higher layer to suspend the count of the first power counter and the second power counter when the terminal device transmits a random access request using a beam different from the beam used by the terminal device to retransmit the random access request.

[0177] It should be noted that the type of random access occasion used by the terminal device to transmit or retransmit the random access request is not limited herein, i.e., the terminal device can use the first random access occasion to transmit or retransmit the random access request, or can use the second random access occasion to transmit or retransmit the random access request.

[0178] In this embodiment, the terminal device uses the first power counter and the second power counter to count the first random access occasion and the second random access occasion respectively, so as to achieve independent power control when the terminal device uses different types of random access occasions for random access, and improve the flexibility of random access.

[0179] In this embodiment, the network device configures a corresponding preamble range for the first random access occasion and the second random access occasion respectively, for the terminal device to use when performing random access.

[0180] In this embodiment, the network device transmits fourth information to the terminal device, and the terminal device correspondingly receives the fourth information. The fourth information indicates a preamble range corresponding to the first random access occasion. When the terminal device transmits a random access request using the first random access occasion, the terminal device selects a target preamble in the random access request from the preamble range.

[0181] Correspondingly, the network device also configures a corresponding preamble range for the second random access occasion. When the terminal device transmits a random access request using the second random access occasion, the terminal device selects a target preamble in the random access request from the preamble range corresponding to the second random access occasion.

[0182] Specifically, the preamble range includes a preamble start index and a length. That is, the preamble index range can be determined by the preamble start index and the length, and the preambles indicated in the preamble index range constitute the preamble range.

[0183] It should be noted that each of the above embodiments in the present application can be independently implemented, or can be implemented in combination with each other.

[0184] For example, the preamble range configured in embodiment 12 can be combined with the solutions in the foregoing embodiments 1-11. Taking embodiment 1 as an example, the terminal device can receive the fourth information before the first random access occasion and the second random access occasion are uniformly numbered.

[0185] For example, embodiment 1 and embodiment 2 are two parallel embodiments.

[0186] For example, the random access occasion for CFRA indicated by the first information in embodiment 3 can be combined with the solutions in embodiments 1 / 2 / 4 / 5 / 7-12.

[0187] For example, embodiment 4 and embodiment 5 are two parallel embodiments.

[0188] For example, the type of available random access occasion indicated in the PDCCH signaling in embodiment 6 can be combined with the solutions in embodiments 1 / 2 / 4 / 5 / 7-12.

[0189] For example, embodiment 7 and embodiment 8 are two parallel embodiments.

[0190] For example, embodiment 10 and embodiment 11 are two parallel embodiments.

[0191] For example, the repetition of the association period in embodiment 9 can be combined with other embodiments.

[0192] Please refer to FIG. 10, which shows a communication apparatus 100, which can include:

[0193] The communication module 1001 is configured to receive RACH configuration information.

[0194] The communication module 1001 is further configured to send a random access request using the first target random access occasion.

[0195] Further, the communication apparatus 100 can further include a processing module, which is configured to number the first random access occasions and the second random access occasions within the association mode period to obtain a first number set, the first number set being used to determine the first target random access occasion; or number the first random access occasions and the second random access occasions within the association mode period to obtain a second number set.

[0196] Further, the processing module is configured to count the first random access occasions and the second random access occasions respectively within the association mode period to obtain a third number set and a fourth number set.

[0197] Further, the communication module 1001 is further configured to receive first information, the first information indicating the first random access occasion or the second random access occasion for the contention-free random access.

[0198] Further, the communication module 1001 is further configured to receive information of a first physical random access, PRACH, mask, the first PRACH mask being used to determine a candidate random access occasion in the first random access occasion and / or the second random access occasion.

[0199] Further, the communication module 1001 is further configured to receive second information, the second information indicating that the first PRACH mask is used in the first random access occasion and / or the second random access occasion.

[0200] Further, the communication module 1001 is further configured to receive information of a second PRACH mask and information of a third PRACH mask, the second PRACH mask being used to determine a first candidate random access occasion in the first random access occasion, and the third PRACH mask being used to determine a second candidate random access occasion in the second random access occasion.

[0201] Further, the communication module 1001 is further configured to receive third information, the third information indicating that the first target random access occasion is the first random access occasion or the second random access occasion.

[0202] Further, the processing module is further configured to map a corresponding number of SSBs in an SSB period to at least one first random access occasion in a first association period, the first association period corresponding to the first random access occasion; and map a corresponding number of SSBs in the SSB period to one second random access occasion in a second association period.

[0203] Further, the communication module 1001 is further configured to retransmit the random access request using the second target random access occasion.

[0204] Further, the communication module 1001 is further configured to receive fourth information, the fourth information indicating a preamble range corresponding to the first random access occasion.

[0205] In specific implementations, the communication apparatus 100 described above can correspond to a chip with a communication function in a terminal device, such as a System-On-a-Chip (SOC), a baseband chip, etc.; or a chip module including a chip with a communication function in a terminal device; or a chip module including a chip with a data processing function, or a terminal device.

[0206] In one non-limiting embodiment, the communication module 1001 is configured to send RACH configuration information.

[0207] The communication module 1001 is further configured to receive the random access request using the first target random access occasion.

[0208] In specific implementations, the communication apparatus 100 described above can correspond to a chip with a communication function in a network device, such as an SOC, a baseband chip, etc.; or correspond to a chip module including a chip with a communication function in a network device; or correspond to a chip module with a data processing function, or correspond to a network device.

[0209] Other related descriptions of the communication apparatus 100 can refer to the related descriptions in the foregoing embodiments, which will not be repeated here.

[0210] As to each module / unit in the various devices, products described in the foregoing embodiments, it can be a software module / unit, or a hardware module / unit, or part of software module / unit and part of hardware module / unit. For example, as to each device, product applied to or integrated in a chip, each module / unit included can be implemented in the form of hardware such as circuit, or at least part of the module / unit can be implemented in the form of software, which is run on a processor integrated in the chip, and the remaining (if any) part of the module / unit can be implemented in the form of hardware such as circuit; as to each device, product applied to or integrated in a chip module, each module / unit included can be implemented in the form of hardware such as circuit, and different modules / units can be located in the same component (such as a chip, a circuit module, etc.) or different components of the chip module, or at least part of the module / unit can be implemented in the form of software, which is run on a processor integrated in the chip module, and the remaining (if any) part of the module / unit can be implemented in the form of hardware such as circuit; as to each device, product applied to or integrated in a terminal device, each module / unit included can be implemented in the form of hardware such as circuit, and different modules / units can be located in the same component (such as a chip, a circuit module, etc.) or different components of the terminal device, or at least part of the module / unit can be implemented in the form of software, which is run on a processor integrated in the terminal device, and the remaining (if any) part of the module / unit can be implemented in the form of hardware such as circuit.

[0211] The embodiments of the present application further disclose a storage medium, which is a computer readable storage medium, and has stored thereon a computer program. The computer program can execute the steps of the method shown in the foregoing embodiments when running. The storage medium can include a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, etc. The storage medium can also include a non-volatile memory or a non-transitory memory, etc.

[0212] Please refer to FIG. 11, the embodiments of the present application further provide a hardware structure schematic diagram of a communication device. The device includes a processor 1101, a memory 1102 and a transceiver 1103.

[0213] The processor 1101 can be a general central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs of the embodiments of the present application. The processor 1101 can also include multiple CPUs, and the processor 1101 can be a single-CPU processor or a multi-CPU processor. The processor herein can refer to one or more devices, circuits or processing cores for processing data (for example, computer program instructions).

[0214] The memory 1102 can be a ROM, or other type of static storage that can store static information and instructions; a RAM, or other type of dynamic storage that can store information and instructions; an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, a magnetic disk storage or other magnetic storage devices, or any other medium capable of storing instructions or data that can be accessed by a computer, without limitation. The memory 1102 can be present either in the device or external to the device. The memory 1102 can include computer program code. The processor 1101 can be configured to execute the computer program code stored in the memory 1102 to implement the methods described in the embodiments of the present application.

[0215] The processor 1101, the memory 1102 and the transceiver 1103 are connected through a bus. The transceiver 1103 is configured to communicate with other devices or communication networks. Optionally, the transceiver 1103 can include a transmitter and a receiver. The device for implementing the receiving function in the transceiver 1103 can be regarded as a receiver, which is configured to perform the receiving steps in the embodiments of the present application. The device for implementing the sending function in the transceiver 1103 can be regarded as a transmitter, which is configured to perform the sending steps in the embodiments of the present application.

[0216] When the structure diagram shown in FIG. 11 is used to illustrate the structure of the terminal device involved in the above embodiments, the processor 1101 is configured to control and manage the actions of the terminal device. For example, the processor 1101 is configured to support the terminal device to perform the actions performed by the terminal device in other processes described in the embodiments of the present application. The processor 1101 can communicate with other network entities through the transceiver 1103, for example, communicate with the network device described above. The memory 1102 is configured to store the program code and data of the terminal device.

[0217] When the structural schematic diagram shown in FIG. 11 is used to show the structure of the network device involved in the above-described embodiments, the processor 1101 is configured to control and manage the actions of the network device, for example, the processor 1101 is configured to support the network device to perform the actions performed by the network device in other processes described in the embodiments of the present application. The processor 1101 can communicate with other network entities, for example, communicate with the terminal device described above, through the transceiver 1103. The memory 1102 is configured to store the program code and data of the network device.

[0218] The embodiments of the present application define the unidirectional communication link from the access network to the terminal device as a downlink, the data transmitted on the downlink as downlink data, and the transmission direction of the downlink data as a downlink direction. The unidirectional communication link from the terminal device to the access network is an uplink, the data transmitted on the uplink is uplink data, and the transmission direction of the uplink data is an uplink direction.

[0219] It should be understood that the term "and / or" herein is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " herein represents that the front and rear associated objects are in an "or" relationship.

[0220] The "multiple" appearing in the embodiments of the present application means two or more.

[0221] The first, second, and the like appearing in the embodiments of the present application are only used for illustrative and distinguishing description objects, and do not have order, nor represent special limitation of the number of devices in the embodiments of the present application, and cannot constitute any limitation on the embodiments of the present application.

[0222] The "connection" appearing in the embodiments of the present application means direct connection or indirect connection and various connection modes to realize communication between devices, and the embodiments of the present application do not make any limitation on this.

[0223] The above-described embodiments can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, the above-described embodiments can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on a computer, the processes or functions described in the embodiments of the present application are wholly or partially generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions can be transferred from one website, computer, server, or data center to another website, computer, server, or data center through a wired or wireless manner.

[0224] It should be understood that the size of the sequence number of each process described above in various embodiments of the present application does not mean the order of execution, and the execution order of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0225] In several embodiments provided in the present application, it should be understood that the disclosed methods, devices and systems can be implemented in other ways. For example, the device embodiments described above are only schematic; for example, the division of the units is only a logical function division, and actual implementation can have another division manner; for example, a plurality of units or components can be combined or integrated into another system, or some features can be omitted or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0226] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0227] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically included separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of hardware plus software functional unit.

[0228] The integrated unit implemented in the form of software functional units can be stored in a computer readable storage medium. The software functional units stored in the storage medium can include a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute part of the steps of the methods described in the various embodiments of the present application.

[0229] Although the present application has been disclosed with reference to above examples, it is not limited to the above examples. Any person skilled in the art, without departing from the spirit and scope of the present application, can make various modifications and changes, and the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. A communication method characterized by comprising: Comprising: receiving random access channel (RACH) configuration information, the RACH configuration information being used for configuring at least one first random access occasion and at least one second random access occasion, the first random access occasion being located in a downlink simultaneous full duplex (SBFD) symbol, the second random access occasion being located in other symbols, or the first random access occasion being located in an SBFD symbol, the second random access occasion being located in a non-SBFD symbol; sending a random access request using a first target random access occasion, the first target random access occasion being the first random access occasion or the second random access occasion.

2. The communication method according to claim 1, characterized by, Further comprising: numbering the first random access occasion and the second random access occasion to obtain a first numbering set in an association mode period, the first numbering set being used for determining the first target random access occasion; Or, numbering the first random access occasion and the second random access occasion to obtain a second numbering set in the association mode period, the second numbering set being used for determining the first target random access occasion, a first number of consecutive numbers in the second numbering set indicating the second random access occasion, and the remaining consecutive numbers in the second numbering set indicating the first random access occasion.

3. The communication method according to claim 1 or 2, characterized by, The RACH configuration information comprises a random access occasion list and / or a channel state information reference signal (CSI-RS) resource list, The random access occasion list comprises an index of the first random access occasion and an index of the second random access occasion; The CSI-RS resource list comprises an index of a first CSI-RS resource associated with the index of the first random access occasion and an index of a second CSI-RS resource associated with the index of the second random access occasion.

4. The communication method according to claim 1, characterized by, Further comprising: numbering the first random access occasion and the second random access occasion respectively to obtain a third numbering set and a fourth numbering set in an association mode period, the third numbering set and the fourth numbering set being used for determining the first target random access occasion.

5. The communication method according to claim 4, wherein, The RACH configuration information comprises a CSI-RS resource list and a random access occasion list, the random access occasion list comprising a first random access occasion list or a second random access occasion list; The CSI-RS resource list comprises an index of a CSI-RS resource; The first random access occasion list comprises an index of the first random access occasion, the second random access occasion list comprises an index of the second random access occasion, and the CSI-RS resource is associated with the index of the first random access occasion or the index of the second random access occasion.

6. The communication method according to claim 4, wherein, The RACH configuration information comprises a first CSI-RS resource list and a second CSI-RS resource list, The first CSI-RS resource list includes an index of a third CSI-RS resource, and the second CSI-RS resource list includes an index of a fourth CSI-RS resource, the third CSI-RS resource is associated with the index of the first random access occasion, and the fourth CSI-RS resource is associated with the index of the second random access occasion.

7. The communication method of claim 1, wherein, Further comprising: receiving first information indicating the first random access occasion or the second random access occasion for contention-free random access.

8. The communication method of claim 1, wherein, Further comprising: receiving information of a first physical random access, PRACH, mask used for determining a candidate random access occasion in the first random access occasion and / or the second random access occasion, the candidate random access occasion including the first target random access occasion.

9. The communication method according to claim 8, wherein, Further comprising: receiving second information indicating that the first PRACH mask is used for the first random access occasion and / or the second random access occasion.

10. The communication method according to claim 1, wherein, Further comprising: receiving information of a second PRACH mask and information of a third PRACH mask, the second PRACH mask being used for determining a first candidate random access occasion in the first random access occasion, and the third PRACH mask being used for determining a second candidate random access occasion in the second random access occasion, the first candidate random access occasion or the second candidate random access occasion including the first target random access occasion.

11. The communication method of claim 1, wherein, Further comprising: receiving third information indicating that the first target random access occasion is the first random access occasion or the second random access occasion.

12. The communication method of claim 1, wherein, Further comprising: mapping a synchronization signal block, SSB, to the at least one first random access occasion in each association period; mapping a corresponding number of SSBs in an SSB period to the at least one second random access occasion in each association period.

13. The communication method of claim 1, wherein, Further comprising: mapping a corresponding number of SSBs in an SSB period to the at least one first random access occasion in a first association period, the first association period corresponding to the first random access occasion; mapping a corresponding number of SSBs in an SSB period to the at least one second random access occasion in a second association period, the second association period corresponding to the second random access occasion.

14. The communication method of claim 1, wherein, In a case where an association period associated with the first random access occasion is different from an association period corresponding to the second random access occasion, the association period corresponding to the first random access occasion repeats according to an association mode period; In a case where the first random access occasion and the second random access occasion correspond to a same association period, the association period corresponding to the first random access occasion does not completely repeat according to an association mode period.

15. The communication method of claim 1, wherein, The RACH configuration information includes first RACH configuration information and second RACH configuration information, and the communication method further includes: retransmitting the random access request using the second target random access occasion; In a case where first RACH configuration information used for determining the first target random access occasion is different from second RACH configuration information used for determining the second target random access occasion, the high layer is informed to suspend a power counter, a count of the power counter being used for determining a transmission power of the random access request; or, In a case where a symbol type of the first target random access occasion is different from a symbol type of the second target random access occasion, the high layer is informed to suspend the power counter, the symbol type including a sub-band full duplex symbol or a non-sub-band full duplex symbol; or, In a case where a type of the first target random access occasion is different from a type of the second target random access occasion, the high layer is informed to suspend the power counter.

16. The communication method of claim 1, wherein, Further comprising: receiving fourth information, the fourth information indicating a preamble range corresponding to the first random access occasion, the random access request including a target preamble, the preamble range being used for determining the target preamble.

17. The communication method according to claim 16, wherein, The preamble range includes a preamble start index and a length.

18. The communication method of claim 1, wherein, Further comprising: counting the first random access occasion using a first power counter, wherein the first target random access occasion is the first random access occasion, a count of the first power counter being used for determining a transmission power of the random access request; or, counting the second random access occasion using a second power counter, wherein the first target random access occasion is the second random access occasion, a count of the second power counter being used for determining a transmission power of the random access request.

19. A method of communication, comprising: Comprising: transmitting RACH configuration information, the RACH configuration information being used for configuring at least one first random access occasion and at least one second random access occasion, the first random access occasion being located in a downlink SBFD symbol, the second random access occasion being located in other symbols, or the first random access occasion being located in an SBFD symbol, the second random access occasion being located in a non-SBFD symbol; receiving a random access request using a first target random access occasion, the first target random access occasion being the first random access occasion or the second random access occasion.

20. The communication method according to claim 19, wherein, Further comprising: transmitting first information, the first information indicating the first random access occasion or the second random access occasion for contention-free random access.

21. The communication method according to claim 19, wherein, Further comprising: transmitting a first PRACH mask, the first PRACH mask being used for determining a candidate random access occasion in the first random access occasion and / or the second random access occasion, the candidate random access occasion including a first target random access occasion.

22. The communication method according to claim 21, wherein, Further comprising: transmitting second information, the second information indicating that the first PRACH mask is used for the first random access occasion and / or the second random access occasion.

23. The communication method of claim 19, wherein, Further comprising: transmitting a second PRACH mask and a third PRACH mask, the second PRACH mask being used to determine a first candidate random access occasion in the first random access occasion, the third PRACH mask being used to determine a second candidate random access occasion in the second random access occasion, the first candidate random access occasion or the second candidate random access occasion comprising a first target random access occasion.

24. The communication method according to claim 19, wherein, Further comprising: transmitting third information, the third information indicating that the first target random access occasion is the first random access occasion or the second random access occasion.

25. The communication method of claim 19, wherein, in a case where the first random access occasion and the second random access occasion correspond to different associated periods, the associated period corresponding to the first random access occasion repeats according to an associated mode period; in a case where the first random access occasion and the second random access occasion correspond to the same associated period, the associated period corresponding to the first random access occasion does not completely repeat according to an associated mode period.

26. The communication method of claim 19, wherein, Further comprising: transmitting fourth information, the fourth information indicating a preamble range corresponding to the second random access occasion, the random access request comprising a target preamble, the preamble range being used to determine the target preamble.

27. A communications device, characterized by Comprising: a communication module, configured to receive RACH configuration information, the RACH configuration information being used to configure at least one first random access occasion and at least one second random access occasion, the first random access occasion being located in a downlink full-duplex, SBFD, symbol, the second random access occasion being located in other symbols, or the first random access occasion being located in an SBFD symbol, and the second random access occasion being located in a non-SBFD symbol; the communication module is further configured to transmit a random access request using a first target random access occasion, the first target random access occasion being the first random access occasion or the second random access occasion.

28. A communications device, characterized by Comprising: a communication module, configured to transmit RACH configuration information, the RACH configuration information being used to configure at least one first random access occasion and at least one second random access occasion, the first random access occasion being located in a downlink SBFD symbol, the second random access occasion being located in other symbols, or the first random access occasion being located in an SBFD symbol, and the second random access occasion being located in a non-SBFD symbol; the communication module is further configured to receive a random access request using a first target random access occasion, the first target random access occasion being the first random access occasion or the second random access occasion.

29. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is run by a processor to perform the steps of the communication method of any one of claims 1 to 18, or to perform the steps of the communication method of any one of claims 19 to 26.

30. A computer program product comprising computer programs / instructions, characterized in that, The computer program / instruction is executed by a processor to perform the steps of the communication method of any one of claims 1 to 18, or to perform the steps of the communication method of any one of claims 19 to 26.

31. A communication device comprising a memory and a processor, said memory having stored thereon a computer program that is operable to run on said processor, characterized in that, The processor, when running the computer program, performs the steps of the communication method of any one of claims 1 to 18; or the processor, when running the computer program, performs the steps of the communication method of any one of claims 19 to 26.

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