Communication methods and apparatuses, storage medium and program product

Abstract

Provided are communication methods and apparatuses, a storage medium and a program product, relating to the technical field of communications. A method comprises: receiving SBFD information sent by a second node.

Description

Communication method, apparatus, storage medium and program product

[0001] The present disclosure claims priority to Chinese Patent Application No. 202411399799.6, filed on September 30, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of communication, and particularly relates to a communication method, apparatus, storage medium and program product BACKGROUND

[0003] The fourth generation mobile communication technology (4G) long term evolution (LTE) or LTE-advance (LTE-A) and the fifth generation mobile communication technology (5G) are facing more and more demands. According to the current development trend, the 4G and 5G systems are developing support for enhanced mobile broadband (eMBB), ultra-reliable and low-latency communications (URLLC) and massive machine type communications (mMTC) functions. Full duplex is a requirement for 5G and later communication systems. However, the network self-optimization effect is not good under the full duplex mode at present. SUMMARY

[0004] In a first aspect, a communication method is provided, applied to a first node, and the method comprises:

[0005] receiving subband full duplex (SBFD) information sent by a second node.

[0006] In a second aspect, a communication method is provided, applied to a second node, and the method comprises:

[0007] sending SBFD information to a first node.

[0008] In a third aspect, a communication method is provided, applied to a first node, and the method comprises:

[0009] receive multicast / broadcast services (MBS) information sent by the fourth node in a case that a preset condition is met, the preset condition comprising that a cell associated with the multicast / broadcast services information is a cell associated with the first node.

[0010] In a fourth aspect, a communication apparatus applied to the first node is provided, comprising:

[0011] The receiving unit is configured to receive the SBFD information sent by the second node.

[0012] In a fifth aspect, a communication apparatus applied to the second node is provided, comprising:

[0013] The sending unit is configured to send the SBFD information to the first node.

[0014] In a sixth aspect, a communication apparatus applied to the first node is provided, comprising:

[0015] The receiving unit is configured to receive multicast / broadcast services (MBS) information sent by the fourth node in a case that a preset condition is met, the preset condition comprising that a cell associated with the multicast / broadcast services information is a cell associated with the first node.

[0016] In a seventh aspect, a communication apparatus is provided, comprising a processor and a memory; the memory and the processor are coupled; the memory is configured to store instructions executable by the processor; the processor is configured to execute the instructions, so that the communication apparatus implements the method provided in any one of the first aspect to the third aspect.

[0017] In an eighth aspect, a computer-readable storage medium is provided, which stores computer instructions; when the computer instructions are executed on a computer, the computer executes the method provided in any one of the first aspect to the third aspect. In some embodiments, the computer-readable storage medium comprises a non-transitory computer-readable storage medium.

[0018] In a ninth aspect, a computer program product containing computer instructions is provided; when the computer instructions are executed on a computer, the computer executes the method provided in any one of the first aspect to the third aspect. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present disclosure, the following will briefly introduce the drawings needed to be used in some embodiments of the present disclosure. Obviously, the drawings described in the following description are only the drawings of some embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0020] FIG. 1 is a structure diagram of a communication system according to an embodiment of the present disclosure.

[0021] FIG. 2 is a flow chart of a communication method according to an embodiment of the present disclosure.

[0022] FIG. 3 is a diagram of an SBFD RACH configuration according to an embodiment of the present disclosure.

[0023] FIG. 4 is a diagram of another SBFD RACH configuration according to an embodiment of the present disclosure.

[0024] FIG. 5 is a diagram of another SBFD RACH configuration according to an embodiment of the present disclosure.

[0025] FIG. 6 is a diagram of a frame structure according to an embodiment of the present disclosure.

[0026] FIG. 7 is a diagram of cross-link interference according to an embodiment of the present disclosure.

[0027] FIG. 8 is a flow chart of another communication method according to an embodiment of the present disclosure.

[0028] FIG. 9 is a flow chart of another communication method according to an embodiment of the present disclosure.

[0029] FIG. 10 is a diagram of an NG-RAN architecture according to an embodiment of the present disclosure.

[0030] FIG. 11 is a flow chart of another communication method according to an embodiment of the present disclosure.

[0031] FIG. 12 is a flow chart of another communication method according to an embodiment of the present disclosure.

[0032] FIG. 13 is a flow chart of another communication method according to an embodiment of the present disclosure.

[0033] FIG. 14 is a block diagram of a communication apparatus according to an embodiment of the present disclosure.

[0034] FIG. 15 is a block diagram of another communication apparatus according to an embodiment of the present disclosure.

[0035] FIG. 16 is a block diagram of another communication apparatus according to an embodiment of the present disclosure.

[0036] FIG. 17 is a block diagram of another communication apparatus according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0037] In order for those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, the technical solutions in the present disclosure will be clearly and completely described in the present disclosure in conjunction with the drawings in the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the protection scope of the present disclosure.

[0038] Unless otherwise required by context, the term "comprise" and other forms such as "comprises", "comprising", "includes", "including" and "includes" are to be construed as open, inclusive meaning, i.e. "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" and the like are intended to mean that the specific features, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or example of the present disclosure. The illustrative representation of the above terms does not necessarily mean the same embodiment or example. In addition, the specific features, structures, materials or characteristics described can be included in any one or more embodiments or examples in any appropriate manner.

[0039] The terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise stated, the meaning of "multiple" is two or more.

[0040] In the embodiments of the present disclosure, the words "exemplarily" or "for example" are used to represent as an example, illustration or description. Any embodiment or design scheme described as "exemplarily" or "for example" in the embodiments of the present disclosure should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "exemplarily" or "for example" and the like is intended to present the relevant concept in a specific manner.

[0041] In addition, the use of "based on" means open and inclusive, because the process, step, calculation or other action "based on" one or more stated conditions or values can be based on additional conditions or beyond the stated values in practice.

[0042] Currently, in a full duplex mode communication system, the network is self-optimized based on a pre-set network optimization strategy, resulting in poor network liberalization effect.

[0043] Based on this, the embodiment of the present disclosure provides a communication method, device, storage medium and program product. After the first node receives the SBFD information sent by the second node, the network can be self-optimized based on the SBFD information. It should be understood that the SBFD information sent by the second node is related to the network quality, and the first node performs network self-optimization based on the SBFD information, so that the network self-optimization can be performed in a targeted manner, thereby improving the network self-optimization effect.

[0044] The embodiment of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0045] The technical scheme provided by the embodiment of the present disclosure can be applied to various TSN supported communication systems, for example, a new radio (NR) communication system using 5G communication technology, a future evolution system, a long term evolution (LTE) or a variety of communication fusion systems, etc. The embodiment of the present disclosure does not limit this.

[0046] FIG. 1 is a structural schematic diagram of a communication system according to an embodiment of the present disclosure. As shown in FIG. 1, the communication system 10 includes a plurality of base stations (for example, base station 21 and base station 22) and a plurality of terminals (for example, terminal 31, terminal 32, terminal 33 and terminal 34). Here, the plurality of base stations and the plurality of terminals can be connected through a wired network or a wireless network. Here, the wired network or the wireless network can include a router, a switch, or other devices that facilitate communication between the plurality of base stations and the plurality of terminals, and the embodiment of the present disclosure does not limit this.

[0047] In some embodiments, the base station is configured to provide wireless access services for a plurality of terminals. Specifically, one base station provides one service coverage area (also referred to as a cell). The terminal entering the area can communicate with the base station through a wireless signal to accept the wireless access service provided by the base station. There can be overlap between the service coverage areas of the base station 21. The terminal in the overlap area can receive wireless signals from multiple base stations.

[0048] In some embodiments, each of the plurality of base stations can connect a plurality of terminals, for example, the base station 21 connects the terminal 31 and the terminal 32. Here, the terminal 31 and the terminal 32 can be located in the same cell, and the terminal 31 and the terminal 32 can also be located in different cells. That is, one base station can provide network services to the terminals in one cell, and can also provide network services to the terminals in multiple cells simultaneously.

[0049] In some embodiments, each of the plurality of base stations (e.g., base station 11) can be any one of an evolution nodeB (eNB), a generation nodeB (gNB), a transmission receive point (TRP), a transmission point (TP), a home base station, and some other access node. Depending on the size of the coverage area to be provided by the base station, the base station can be further classified into a macro base station for providing a macro cell, a micro base station for providing a micro cell, and a femto base station for providing a femto cell. As wireless communication technologies evolve, future base stations can also be referred to by other names.

[0050] In some embodiments, each of the plurality of terminals (e.g., terminal 31) can be a device with wireless transceiver functions, such as a mobile phone, a tablet computer, a wearable device, a vehicle-mounted device, an augmented reality (AR) / virtual reality (VR) device, a notebook computer, an ultra-mobile personal computer (UMPC), a netbook, a personal digital assistant (PDA), and the like. The specific type of terminal device is not limited in the embodiments of the present disclosure.

[0051] It should be understood that FIG. 1 is an exemplary structural diagram, and the number of devices included in the communication system shown in FIG. 1 is not limited, for example, the number of base stations is not limited and the number of terminals is not limited. In addition, the communication system shown in FIG. 1 can include other devices in addition to the devices shown in FIG. 1, which are not limited.

[0052] Next, as shown in FIG. 2, the embodiments of the present disclosure provide a communication method applied to a first node, which can be any one of the plurality of base stations shown in FIG. 1, such as base station 21. The method can include the following steps:

[0053] S101, receiving SBFD information sent by a second node.

[0054] Here, the second node can be a second node within the network coverage range of the first node. In the case of the first node being base station 21, the second node can be terminal 31 in combination with the communication system shown in FIG. 1.

[0055] As an example, after the first node sends the request information to the second node for requesting the SBFD information of the second node, the second node sends the SBFD information to the first node in response to the request information. Accordingly, the first node receives the SBFD information sent by the second node.

[0056] As another example, the second node periodically sends the SBFD information to the first node. Accordingly, the first node receives the SBFD information periodically sent by the second node.

[0057] In some embodiments, in the case that the first node adopts a centralized unit (CU) / distributed unit (DU) split architecture, the CU receives the SBFD information sent by the second node and sends the SBFD information to the DU.

[0058] In some embodiments, after receiving the SBFD information, the first node can share the SBFD information to other network nodes, such as other base stations.

[0059] In some embodiments, the SBFD information includes at least one of the following:

[0060] cell information of a target cell, where the target cell includes at least one of the following: a cell detected by the second node, a cell where a radio link failure occurs, a cell from which a random access is initiated, a cell accessed by the second node;

[0061] SBFD resource configuration information of the target cell;

[0062] SBFD bandwidth part (BWP) configuration information of the target cell;

[0063] SBFD random access configuration information of the target cell;

[0064] information related to initiating a random access under the SBFD random access configuration or the SBFD bandwidth part configuration;

[0065] information for selection under multiple different types of random access configurations or SBFD bandwidth part configurations;

[0066] information for cell selection and reselection under the SBFD random access configuration or the SBFD bandwidth part configuration;

[0067] indication information for indicating whether cross-link interference is detected under the corresponding SBFD resource configuration or random access configuration;

[0068] a measurement value of a cross-link interference reference signal detected under the corresponding SBFD resource configuration or random access configuration;

[0069] Detect the resource location of interference under corresponding SBFD resource configuration or random access configuration.

[0070] It should be noted that the random access configuration involved in the embodiments of the present disclosure can be replaced by RACH configuration, and the bandwidth part configuration can be replaced by BWP configuration, both of which are the same concept. The random access configuration, bandwidth part configuration or SBFD resource configuration involved in the embodiments of the present disclosure is the configuration information obtained by the second node from the network.

[0071] The following explains each item of information contained in the SBDF information.

[0072] V0, the SBFD bandwidth part configuration information of the target cell includes but is not limited to at least one of the following:

[0073] Bandwidth;

[0074] Offset from the starting point (such as point A);

[0075] Subcarrier spacing;

[0076] Indication information for indicating that the bandwidth part configuration is a bandwidth part configuration for initiating random access;

[0077] Indication information for indicating the type of the bandwidth part configuration, including shared bandwidth part configuration or dedicated bandwidth part configuration.

[0078] V1, the SBFD resource configuration information of the target cell includes but is not limited to at least one of the following:

[0079] Subcarrier spacing;

[0080] The number of physical resource blocks (PRBs) contained in a subband;

[0081] The bandwidth of the downlink subband or the uplink subband or the guard subband, i.e. the number of consecutive PRBs;

[0082] The starting position of the downlink subband or the uplink subband or the guard subband, such as the starting PRB;

[0083] The starting offset of downlink subband or uplink subband or guard subband, such as Point A (the lowest subcarrier of common RB 0) in the frequency domain and the frequency offset of the corresponding subband in the number of PRBs (Offset in frequency domain between Point A (lowest subcarrier of common RB 0) and the location of corresponding subband in number of PRBs);

[0084] Subband index and / or subband type (for example, downlink subband or uplink subband or guard subband or flexible subband or dedicated subband configured to UE);

[0085] PRB index and / or PRB type (for example, downlink PRB or uplink PRB or guard PRB or flexible PRB or dedicated PRB configured to UE);

[0086] The number of one subband type. For example, containing two downlink subbands.

[0087] V2, the information for selecting or switching under multiple different types of SBFD random access configuration or SBFD partial bandwidth configuration includes but is not limited to at least one of the following:

[0088] 1. Priority information, SBFD random access configuration or SBFD partial bandwidth configuration can contain a priority, and the second node can select the configuration according to the priority;

[0089] 2. Reference signal receiving power (RSRP) threshold information, used for selecting the SBFD RACH configuration or SBFD BWP configuration used according to the RSRP of the cell;

[0090] 3. The next SBFD RACH configuration or SBFD BWP configuration should be backed up or switched after the access fails using the current configuration, or the next RACH configuration type or BWP configuration type should be backed up or switched.

[0091] V3, the related information for initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration includes at least one of the following:

[0092] The number of times of initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration, or the number of times of initiating message 1 (msg1) / msgA under the SBFD random access configuration or the SBFD partial bandwidth configuration;

[0093] Indication information for indicating whether a collision is detected when initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration, for example, when initiating contention-based random access, competition with other second nodes is found in the random access process;

[0094] Indication information for indicating whether backoff or switching occurs when initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration;

[0095] The type or configuration of the random access configuration or the SBFD partial bandwidth configuration adopted after backoff or switching occurs when initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration;

[0096] The reason for backoff or switching occurring when initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration, for example, the maximum number of transmissions is reached or an indication from the network is received;

[0097] Indication information for indicating whether the initiation of random access under the SBFD random access configuration or the SBFD partial bandwidth configuration is successful;

[0098] Indication information for indicating whether cross-link interference is monitored when initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration;

[0099] The measurement value of the cross-link interference reference signal, for example, the channel state information-reference signal (CSI-RS) RSRP, monitored when initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration.

[0100] V4, the related information of initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration further includes at least one of the following:

[0101] Synchronization signal / PBCH block (SSB) index and the number of RACH preambles sent on each attempted SSB (arranged in the order of attempt time);

[0102] Frequency of the attempted SSB (new radio (NR) absolute radio frequency channel number);

[0103] Beam quality of each attempted SSB (i.e. beam level measurements during RACH attempt, such as beam reference signal received power (BRSRP), beam reference signal received quality (BRSRQ), beam signal-to-interference-plus-noise ratio (BSINR));

[0104] Elapsed time between the last measurement and the beam selection time.

[0105] It should be noted that the above related information for initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration can be presented in the form of a list.

[0106] V5, the target cell information includes at least one of the following:

[0107] Physical cell identity;

[0108] New radio cell global identity;

[0109] Tracking area code;

[0110] Frequency.

[0111] V6, the SBFD random access configuration information of the target cell includes but is not limited to at least one of the following:

[0112] 1. Location of random access resource;

[0113] 2. Random access preamble configuration;

[0114] 3. User equipment feature combination (UE feature combination) information of random access, such as reduced capability (Redcap), small data, slice information, msg3-repetitions, slice information, different UE features such as SFBD;

[0115] 4. Random access channel (RACH) backoff parameter value;

[0116] 5. RACH transmission power control parameters;

[0117] 6. RACH partition information;

[0118] 7. The type of the RACH configuration, including at least one of the following: legacy RACH configuration for non-SBFD UEs, shared RACH configuration for SBFD UEs and non-SBFD UEs, independent RACH configuration for SBFD UEs (also referred to as dedicated RACH configuration for SBFD UEs). Each RACH configuration can be further divided into contention-based RACH configuration and non-contention-based RACH configuration. Each RACH configuration can be further divided into 2-step random access and 4-step random access;

[0119] 8. Partial bandwidth configuration information for initiating random access.

[0120] V7: The information for cell selection and reselection under SBFD random access configuration or SBFD partial bandwidth configuration includes but is not limited to the reference signal threshold information of the cell, such as the minimum required quality level in the cell (Qqualmin), the offset parameter to the signalled Qqualmin (Qqualminoffset), etc.

[0121] The following describes the different types of BWP.

[0122] The BWP configuration dedicated for SBFD resource configuration refers to that the base station configures a set of BWP configuration dedicated for SBFD UEs for the SBFD UEs. The SBFD UEs can initiate initial random access using the BWP configuration.

[0123] The legacy BWP configuration contains at least one of the following: the random access configuration corresponding to the BWP, the PUSCH configuration or the PDSCH configuration, the PUCCH or PDCCH configuration;

[0124] The shared BWP configuration refers to the BWP configuration that can be used for SBFD UEs and also can be used for the BWP configuration of non-SBFD ordinary UEs.

[0125] For SBFD UEs, the network can configure a shared BWP configuration, or a dedicated SBFD BWP configuration to the SBFD UEs. In addition, the network can also configure the BWP priority of the SBFD UEs, which is included in the BWP configuration, to indicate which type of BWP configuration (e.g., dedicated SBFD BWP configuration, shared BWP configuration, or legacy BWP configuration) to be used preferentially.

[0126] For SBFD UEs, according to the configuration, the SBFD UEs initiate random access (message 1) on the random access resource corresponding to the SBFD BWP configuration. The network can indicate in the subsequent random access response (message 2) whether the SBFD UEs switch the BWP type, for example, from the SBFD BWP configuration to the shared BWP configuration or the legacy BWP configuration. The SBFD UEs can switch to the corresponding BWP configuration according to the indication to complete the random access (send message 3 or receive message 4) or initiate a new random access.

[0127] If the random access on the SBFD BWP configuration fails (e.g., the number of random access preambles reaches the maximum value), the SBFD UEs can switch to the shared BWP configuration or the legacy BWP configuration to re-initiate random access.

[0128] The following describes the different types of random access configurations described above.

[0129] The different types of random access configurations include a non-SBFD RACH configuration and at least one SBFD RACH configuration.

[0130] Here, the at least one SBFD RACH configuration includes at least one of the following: a first SBFD RACH configuration and / or a second SBFD RACH configuration; the first SBFD RACH configuration shares part or all of the configuration parameters of the non-SBFD RACH configuration; and the configuration parameters in the second SBFD RACH configuration are independently configured from the configuration parameters of the non-SBFD RACH configuration.

[0131] To more clearly illustrate the scheme provided by the present disclosure, the concepts of the non-SBFD RACH configuration, the first SBFD RACH configuration, and the second SBFD RACH configuration are first described below.

[0132] (1) Non-SBFD RACH configuration.

[0133] Non-SBFD RACH configuration, which can also be referred to as a legacy RACH configuration or a legacy RACH configuration, is not described below.

[0134] Here, the non-SBFD RACH configuration includes at least one of the following:

[0135] A legacy four-step random access channel (4-step RACH) configuration, such as RACH-ConfigCommon, the legacy 4-step RACH configuration can also be referred to as a 4-step non-SBFD RACH;

[0136] A legacy two-step random access channel (2-step RACH) configuration, such as MsgA-ConfigCommon-r16, the legacy 2-step RACH configuration can also be referred to as a 2-step non-SBFD RACH;

[0137] A legacy contention-based random access channel (CBRA RACH) configuration, which is also referred to as a contention-based random access configuration, such as RACH-ConfigCommon or MsgA-ConfigCommon-r16 configured in the uplink common bandwidth (BWP-UplinkCommon); The legacy CBRA RACH configuration can also be referred to as a CBRA non-SBFD RACH.

[0138] A legacy contention-free random access channel (CFRA RACH) configuration, such as RACH-ConfigDedicated or CFRA or CFRA-TwoStep-r16, or SI-RequestConfig, or RACH-ConfigBFR configured in BeamFailureRecoveryConfig, etc., the legacy CFRA RACH configuration can also be referred to as a CFRA non-SBFD RACH configuration.

[0139] (2) The first SBFD RACH configuration.

[0140] The first SBFD RACH configuration can also be referred to as a shared SBFD RACH configuration. The first node can provide the second node with one or more sets of first SBFD RACH configurations based on non-SBFD RACH configurations, each of which specifies that the second node supporting SBFD can initiate random access according to the RACH parameters specified in the configuration.

[0141] For example, the first SBFD RACH configuration includes a first 4-step SBFD RACH configuration; the first 4-step SBFD RACH configuration can also be referred to as a shared 4-step SBFD RACH configuration, which can be configured based on or corresponding to a conventional 4-step RACH configuration.

[0142] For another example, the first SBFD RACH configuration includes a first 2-step SBFD RACH configuration; the first 2-step SBFD RACH configuration can also be referred to as a shared 2-step SBFD RACH configuration, which can be configured based on or corresponding to a conventional 2-step RACH configuration; here, the conventional 2-step RACH configuration can be independent of the conventional 4-step RACH configuration, or share the conventional 4-step RACH configuration.

[0143] For another example, the first SBFD RACH configuration includes a first CBRA SBFD RACH configuration, which can also be referred to as a shared CBRA SBFD RACH configuration, which can be based on or corresponding to a conventional CBRA RACH configuration.

[0144] For another example, the first SBFD RACH configuration includes a first CFRA SBFD RACH configuration, which can also be referred to as a shared CFRA SBFD RACH configuration, which can be based on or corresponding to a conventional CFRA RACH configuration.

[0145] It should be noted that the above-mentioned first 4-step SBFD RACH configuration, first 2-step SBFD RACH configuration, first CBRA SBFD RACH configuration, and first CFRA SBFD RACH configuration can also be understood as RACH sub-configurations included in the first SBFD RACH configuration.

[0146] The first SBFD RACH configuration shares part or all of the configuration parameters of the non-SBFD RACH configuration. Exemplarily, the random access channel occasion (RO) mapping rule provided by the non-SBFD RACH configuration also applies to the corresponding first SBFD RACH configuration.

[0147] As an example, the non-SBFD RACH configuration provides a set of configured time-frequency resources of ROs, then the second node supporting SBFD and the second node not supporting SBFD use different RO validation rules for the same set of configured ROs, so that the second node supporting SBFD and the second node not supporting SBFD respectively obtain a part of the time-domain code domain resources completely non-overlapping valid ROs, and also respectively obtain a part of the time-domain code domain resources partially or completely overlapping valid ROs; or the RO validation rule used by the second node supporting SBFD is such that the RO of the second node supporting SBFD is completely non-overlapping with the RO of the second node not supporting SBFD. Here, the second node supporting SBFD can also be understood as the second node supporting initiating random access on the SBFD RACH resource, and the second node not supporting SBFD can also be understood as the second node not supporting initiating random access on the SBFD RACH resource; for convenience of description, the second node supporting SBFD will be referred to as a sub-band full-duplex terminal (SBFD UE) and the second node not supporting SBFD will be referred to as a non-sub-band full-duplex terminal (non-SBFD UE) in the following.

[0148] As another example, the first node can configure the ROs of the first SBFD RACH configuration to be a subset or the full set of the ROs of the non-SBFD RACH configuration. In addition, the first node can further configure a sub-band full-duplex random access channel occasion mask (SBFD RO mask) to indicate that only the RO indices indicated by the SBFD RO mask can be shared for SBFD UE use. For example, the RACH configuration includes the SBFD RO mask, which indicates the RO indices of the non-SBFD RACH configuration that can be used by SBFD UE; or the first node sends the SBFD RO mask through control signaling, which indicates the RO indices of the non-SBFD RACH configuration that can be used by SBFD UE. In one example, the first node can explicitly indicate that all ROs of the non-SBFD RACH configuration can be shared for SBFD UE use; or the first node can also implicitly indicate that all ROs of the non-SBFD RACH configuration can be shared for SBFD UE use, for example, the first node can implicitly indicate by not configuring the SBFD RO mask parameter. Based on the examples described in the embodiments of the present disclosure, in this case, the SBFD UE can only obtain the ROs that overlap with the time-frequency domain resources of the non-SBFD UE. It should be understood that in some cases, the first node can also indicate through the SBFD RO mask that the ROs of the non-SBFD RACH configuration cannot be shared by SBFD UE.

[0149] As another example, the SBFD UE obtains the ROs that partially overlap with the non-SBFD UE based on the RO validity rule. Further, in the partially overlapping ROs, the SBFD RO mask configured by the first node determines which ROs in the overlapping part can be shared for SBFD UE use.

[0150] (3) The second SBFD RACH configuration.

[0151] The second SBFD RACH configuration can also be referred to as an independent SBFD RACH configuration or a dedicated SBFD RACH configuration, and the configuration parameters in the second SBFD RACH configuration are configured independently of the configuration parameters of the non-SBFD RACH configuration. The first node can provide one or more sets of second SBFD RACH configurations independent of the non-SBFD RACH configuration to the second node, and each set of the configuration specifies that the second node supporting SBFD can initiate random access according to the RACH parameters specified in the configuration.

[0152] For example, the second SBFD RACH configuration comprises: a second 4-step SBFD RACH configuration, and / or, a second 2-step SBFD RACH configuration, according to the type of initiating random access; here, the second 4-step SBFD RACH configuration can also be referred to as an independent 4-step SBFD RACH configuration, which is configured independently of the traditional 4-step RACH configuration; the second 2-step SBFD RACH configuration can also be referred to as an independent 2-step SBFD RACH configuration, which is configured independently of the traditional 2-step RACH configuration.

[0153] For another example, the second SBFD RACH configuration can further comprise: a second CBRA SBFD RACH configuration and / or a second CFRA SBFD RACH configuration; here, the second CBRA SBFD RACH configuration can also be referred to as an independent CBRA SBFD RACH configuration, which is configured independently of the traditional CBRA RACH configuration, and the second CFRA SBFD RACH configuration can also be referred to as an independent CFRA SBFD RACH configuration, which is configured independently of the traditional CBRA RACH configuration.

[0154] It should be noted that the above-mentioned second 4-step SBFD RACH configuration, second 2-step SBFD RACH configuration, second CBRA SBFD RACH configuration, and second CFRA SBFD RACH configuration can also be understood as RACH sub-configurations included in the second SBFD RACH configuration.

[0155] The second SBFD RACH configuration at least contains resource indication of the RO time-frequency code domain independent of the non-CBRA RACH configuration (i.e. the traditional RACH configuration), and / or indication of the SSB-RO mapping relationship independent of the non-CBRA RACH configuration. For example, the second SBFD RACH configuration can contain different preamble formats and / or different physical random access channel (PRACH) configuration periods than the non-CBRA RACH configuration.

[0156] The hierarchy of the second SBFD RACH configuration can be consistent with its opposite non-CBRA RACH configuration, i.e., the same parent node as its opposite non-CBRA RACH configuration; or the hierarchy of the second SBFD RACH configuration can be configured in the opposite non-CBRA RACH configuration, i.e., a lower level of the opposite non-CBRA RACH configuration; or the second SBFD RACH configuration can be configured at the same level as the parent node of its opposite non-CBRA RACH configuration. In an example, in a scenario where there is no extensible signaling space in the parent node of the opposite non-CBRA RACH configuration of the second SBFD RACH configuration, the second SBFD RACH configuration can be configured at the same level as the parent node of its opposite non-CBRA RACH configuration.

[0157] The second SBFD RACH configuration can also include a feature combination preamble list (featureCombinationPreamblesList), indicating that different preamble index intervals corresponding to different features are also supported in the second SBFD RACH configuration, i.e., RACH partition is supported.

[0158] In some embodiments, the first node provides both the first SBFD RACH configuration and the second SBFD RACH configuration; or the first node provides only one of the first SBFD RACH configuration or the second SBFD RACH configuration at the same time. Here, the first SBFD RACH configuration and / or the second SBFD RACH configuration can be provided through downlink RRC signaling or downlink broadcast signaling.

[0159] In some embodiments, under contention-based random access CFRA, the first node can add an indication on the non-SBFD RACH configuration dedicated to different functions / scenarios, which indicates whether the non-SBFD RACH configuration can be used by the SBFD UE when the SBFD UE needs to initiate CFRA due to the same function / scenario.

[0160] In some embodiments, the second node supports SBFD.

[0161] In some embodiments, the second node does not support SBFD.

[0162] In some embodiments, the second node is only allowed to perform uplink (UL) transmission on either a normal uplink (NUL) or a supplementary uplink (SUL) at a time, but not both.

[0163] In some embodiments, where the first node provides SBFD RACH configuration, the second node only acquires the SBFD RACH configuration configured on the NUL carrier, i.e. the second node does not receive the SBFD RACH configuration configured in the SUL carrier.

[0164] Exemplarily, the second node acquires multiple sets of random access channel (RACH) configurations on the NUL carrier, including a non-sub-band full-duplex random access channel (SBFD RACH) configuration and at least one SBFD RACH configuration.

[0165] In some embodiments, a supplementary uplink (SUL) carrier can be configured at a lower frequency than a normal downlink (NDL) or normal uplink (NUL) carrier to increase the uplink transmission coverage of the second node. For a TDD system, the SUL can be configured independently of the TDD pattern.

[0166] In some embodiments, the selection and switching between different types of SBFD RACH configurations and non-SBFD RACH (i.e. traditional RACH configurations) mentioned in the embodiments of the present disclosure all occur on the NUL, i.e. after the NUL / SUL carrier selection and when the UE selects the NUL carrier.

[0167] The following description of selection or switching under multiple different types of random access configurations can include the following examples.

[0168] Example 1, the multiple sets of RACH configurations include a non-SBFD RACH configuration and a first SBFD RACH configuration, and the second node fails to perform random access.

[0169] Based on the above description of the first SBFD RACH configuration, it can be known that in the first SBFD RACH configuration, there can be some ROs that cannot be used by second nodes that do not support SBFD (e.g. non SBFD UEs). For example, the ROs configured on the downlink (DL) time are not applicable to non SBFD UEs.

[0170] If the second node fails to attempt Msg1 / MsgA on these ROs, it can switch to non-SBFD RACH configuration, i.e. continue to attempt on legacy RACH resources, to increase the reliability and robustness of Msg1 / MsgA uplink transmission.

[0171] In some embodiments, the second node performs random access based on the second set of RACH configurations in case of failure of random access based on the first set of RACH configurations.

[0172] In some embodiments, each of the multiple sets of RACH configurations comprises at least one RACH sub-configuration, and the second node performs random access based on a second set of RACH sub-configuration in case of failure of random access based on a first set of RACH sub-configuration.

[0173] In some embodiments, the second node selects the first SBFD RACH configuration, and the number of times of failure of initiating Msg1 / MsgA transmission based on the first SBFD RACH configuration reaches a first preset number threshold, the second node can declare random access failure and end the random access procedure.

[0174] In some other embodiments, the second node selects the first SBFD RACH configuration, and after the number of times of failure of initiating Msg1 / MsgA transmission based on the first SBFD RACH configuration reaches a first preset number threshold, the second node switches or falls back to resources specified by a non-SBFD RACH configuration to continue to initiate Msg1 / MsgA transmission.

[0175] Here, the first preset number threshold is configured by the first node or by default, for example, it can be a fixed value specified by a protocol.

[0176] Here, the failure of initiating Msg1 / MsgA transmission once refers to that the second node initiates Msg1 / MsgA transmission but does not receive a corresponding Msg2 / MsgB within a specified time window.

[0177] In some embodiments, the first set of RACH sub-configuration is a first 4-step SBFD RACH sub-configuration, and the second set of RACH configuration is a 4-step non-SBFD RACH sub-configuration.

[0178] Exemplarily, as shown in FIG. 3, if the number of times of failure of the second node in initiating Msg1 transmission based on the first 4-step SBFD RACH sub-configuration reaches a first preset number threshold, the second node switches or falls back to the resource specified by the 4-step non-SBFD RACH sub-configuration to continue initiating Msg1 transmission. Here, the 4-step non-SBFD RACH sub-configuration includes: CBRA 4-step non-SBFD RACH sub-configuration and CFRA 4-step non-SBFD RACH sub-configuration.

[0179] In some embodiments, the first set of RACH sub-configuration is a first 2-step SBFD RACH sub-configuration, and the second set of RACH sub-configuration is a 2-step non-SBFD RACH sub-configuration.

[0180] Exemplarily, as shown in FIG. 3, if the number of times of failure of the second node in initiating MsgA transmission based on the first 2-step SBFD RACH sub-configuration reaches a first preset number threshold, the second node switches or falls back to the resource specified by the 2-step non-SBFD RACH sub-configuration to continue initiating MsgA transmission. Here, the 2-step non-SBFD RACH sub-configuration includes: CBRA 2-step non-SBFD RACH sub-configuration and CFRA 2-step non-SBFD RACH sub-configuration.

[0181] Further, the first node can configure the first preset number threshold to be smaller than a retransmission threshold of switching or falling back from 2-step RACH configuration to 4-step RACH configuration.

[0182] In some embodiments, the first set of RACH sub-configuration is a first 2-step SBFD RACH sub-configuration; and the second set of RACH sub-configuration is a 4-step non-SBFD RACH sub-configuration or a first 4-step SBFD RACH sub-configuration.

[0183] Further, the second node can also select one set of sub-configuration from the 4-step non-SBFD RACH sub-configuration or the first 4-step SBFD RACH sub-configuration as the second set of RACH sub-configuration according to the priority of each RACH sub-configuration configured by the first node.

[0184] Exemplarily, as shown in FIG. 3, if the number of times of failure of the second node in initiating MsgA transmission based on the first 2-step SBFD RACH sub-configuration reaches a second preset number threshold, the second node switches or falls back to the resource specified by the 4-step non-SBFD RACH sub-configuration or the first 4-step SBFD RACH sub-configuration to continue initiating Msg1 transmission.

[0185] In one example, the second node switches or falls back to the resources specified by the 4-step non-SBFD RACH sub-configuration to continue initiating Msg1 transmission.

[0186] In another example, the second node switches or falls back to the resources specified by the first 4-step SBFD RACH sub-configuration to continue initiating MsgA transmission.

[0187] In yet another example, the second node can also select one set of sub-configuration from the 4-step non-SBFD RACH sub-configuration or the first 4-step SBFD RACH sub-configuration as the second set of RACH sub-configuration according to the priority of the configured sub-configuration of the first node, and continue initiating Msg1 transmission on the resources specified by the second set of RACH sub-configuration. Here, the priority of the 4-step non-SBFD RACH sub-configuration can be lower than the priority of the first 4-step SBFD RACH sub-configuration, or the priority of the 4-step non-SBFD RACH sub-configuration can be higher than the priority of the first 4-step SBFD RACH sub-configuration; or the second node can decide by itself whether to fall back or switch to the 4-step non-SBFD RACH sub-configuration or the first 4-step SBFD RACH sub-configuration.

[0188] In some embodiments, if the above-mentioned second preset number threshold is configured, the second node ignores the conventional transmission number threshold for falling back from the 2-step RACH configuration to the 4-step RACH configuration.

[0189] In some embodiments, the above-mentioned second preset number threshold and the above-mentioned first preset number threshold cannot be configured to the second node at the same time, or applied by the second node at the same time.

[0190] In some embodiments, the above-mentioned fallback or switching RACH configuration manner can be performed respectively for CBRA or CFRA scenarios.

[0191] In some embodiments, the above-mentioned fallback or switching RACH configuration manner can be used only once before the second node declares random access failure.

[0192] In some embodiments, if the first node enables the non-SBFD RACH configuration and configures SBFD as a feature, then the fallback can be performed only on the RACH resource set corresponding to the feature combination of the SBFD feature. It should be noted that the above-mentioned fallback can also be understood as switching or reselection, which will not be described below.

[0193] Exemplarily, in the case that the resource set is configured with both 2-step RACH configuration and 4-step RACH configuration, fallback from 2-step RACH configuration to 4-step RACH configuration within the resource set is supported.

[0194] In addition, for each of the above switching / fallback scenarios or for the overall switching / fallback function, the first node can show whether such switching / fallback is allowed or not. Exemplarily, the first node can make such indication with RRC signaling, MAC CE or DCI.

[0195] Alternatively, for each of the above switching / fallback scenarios or for the overall switching / fallback function, it is specified by the protocol whether the second node can make such switching / fallback.

[0196] Example 2, the multiple sets of RACH configurations include a non-SBFD RACH configuration and a second SBFD RACH configuration, and the case of random access failure of the second node.

[0197] Here, the second SBFD RACH configuration at least contains resource indication of RO time-frequency code domain independent of the non-SBFD RACH configuration, and / or indication of independent SSB and RO mapping relationship. For example, the second SBFD RACH configuration can contain different preamble formats from the non-SBFD RACH configuration.

[0198] If switching or fallback from the second SBFD RACH configuration to the non-SBFD RACH configuration, the second node can expand the uplink coverage or increase the uplink Msg1 / MsgA reception robustness by switching different preamble formats, RO resources, power adjustment amount, etc.

[0199] When the second node is provided with the second SBFD RACH configuration, the second node can select the second SBFD RACH configuration, or use the non-SBFD RACH configuration. Here, the second SBFD RACH configuration can include a second 4-step SBFD RACH configuration and / or a second 2-step SBFD RACH configuration.

[0200] Here, the second node's selection between the second 4-step SBFD RACH configuration and the non-SBFD 4-step RACH configuration is similar to the second node's selection between the first 4-step SBFD RACH configuration and the 4-step non-SBFD RACH configuration described in Embodiment Four.

[0201] The second node’s selection and fallback between the second 2-step SBFD RACH configuration and the 2-step non-SBFD RACH configuration is similar to the second node’s selection and fallback between the first 2-step SBFD RACH configuration and the 2-step non-SBFD RACH configuration as described in Embodiment Four.

[0202] The second node’s selection between the second 4-step SBFD RACH configuration and the 2-step non-SBFD RACH configuration is similar to the second node’s selection between the first 4-step SBFD RACH configuration and the 2-step non-SBFD RACH configuration as described in Embodiment Four.

[0203] In some embodiments, the second node’s selection between fallback to the second 4-step SBFD RACH configuration or fallback to the 4-step non-SBFD RACH configuration from the second 2-step SBFD RACH configuration can depend on the second node’s configuration or default, e.g., the priority of the second 4-step SBFD RACH configuration and the 4-step non-SBFD RACH configuration is predefined by the protocol in advance; or the second node selects one configuration by itself. Here, the UE’s self-selection behavior can be specified by the protocol, or signaled or allowed by the first node.

[0204] The second SBFD RACH configuration can provide completely different RACH parameters from the non-SBFD RACH configuration, e.g., the period of RO, preamble format, etc. If the second node’s consecutive random access fails on the second SBFD RACH configuration, the UE can fallback to the non-SBFD RACH configuration to continue the attempt with different RACH parameters to improve the accuracy and robustness of random access.

[0205] In some embodiments, the method further comprises: in case of random access failure based on the first set of RACH configurations, performing random access based on the second set of RACH configurations.

[0206] In some embodiments, each of the multiple sets of RACH configurations comprises at least one RACH sub-configuration, and in case of random access failure based on the first set of RACH sub-configurations, the second node performs random access based on the second set of RACH sub-configurations.

[0207] In some embodiments, the second node selects the second SBFD RACH configuration, and the number of times of failure of initiating Msg1 / MsgA transmission based on the second SBFD RACH configuration reaches a third preset number threshold, the second node can declare random access failure and end the random access procedure.

[0208] In some embodiments, the second node selects the second SBFD RACH configuration, and switches or falls back to the resource defined by the non-SBFD RACH configuration to continue initiating Msg1 / MsgA transmission after the number of times of Msg1 / MsgA transmission failure based on the second SBFD RACH configuration reaches a third preset number threshold.

[0209] Here, the second preset number threshold is configured by the first node or by default, for example, can be a fixed value specified by the protocol.

[0210] In some embodiments, the first set of RACH sub-configurations is a second 4-step SBFD RACH sub-configuration, and the second set of RACH configurations is a 4-step non-SBFD RACH sub-configuration.

[0211] Exemplarily, as shown in FIG. 4, if the number of times of Msg1 transmission failure based on the second 4-step SBFD RACH sub-configuration reaches the third preset number threshold, the second node switches or falls back to the resource defined by the 4-step non-SBFD RACH sub-configuration to continue initiating Msg1 transmission. Here, the 4-step non-SBFD RACH sub-configuration includes: CBRA 4-step non-SBFD RACH sub-configuration and CFRA 4-step non-SBFD RACH sub-configuration.

[0212] In some embodiments, the first set of RACH sub-configurations is a second 2-step SBFD RACH sub-configuration, and the second set of RACH configurations is a 2-step non-SBFD RACH sub-configuration.

[0213] Exemplarily, as shown in FIG. 4, if the number of times of MsgA transmission failure based on the second 2-step SBFD RACH sub-configuration reaches the third preset number threshold, the second node switches or falls back to the resource defined by the 2-step non-SBFD RACH sub-configuration to continue initiating MsgA transmission. Here, the 2-step non-SBFD RACH sub-configuration includes at least one of: CBRA 2-step non-SBFD RACH sub-configuration and CFRA 2-step non-SBFD RACH sub-configuration.

[0214] Further, the first node can configure the third preset number threshold to be less than a retransmission threshold of switching or falling back from a 2-step RACH configuration to a 4-step RACH configuration.

[0215] In some embodiments, the first set of RACH sub-configuration is a second 2-step SBFD RACH sub-configuration; and the second set of RACH sub-configuration is a 4-step non-SBFD RACH sub-configuration or a second 4-step SBFD RACH sub-configuration.

[0216] Further, the second node can also select one of the 4-step non-SBFD RACH sub-configuration or the second 4-step SBFD RACH sub-configuration as the second set of RACH sub-configuration according to the priority of the respective RACH sub-configuration configured by the first node.

[0217] Exemplarily, as shown in FIG. 4, if the number of times of failure of the second node initiating MsgA transmission based on the second 2-step SBFD RACH sub-configuration reaches a fourth preset number threshold, the second node switches or falls back to the resource defined by the 4-step non-SBFD RACH sub-configuration or the 4-step SBFD RACH sub-configuration to continue initiating Msg1 transmission.

[0218] In one example, the second node switches or falls back to the resource defined by the 4-step non-SBFD RACH sub-configuration to continue initiating Msg1 transmission.

[0219] In another example, the second node switches or falls back to the resource defined by the second 4-step SBFD RACH sub-configuration to continue initiating MsgA transmission.

[0220] In yet another example, the second node can also select one of the 4-step non-SBFD RACH sub-configuration or the second 4-step SBFD RACH sub-configuration as the second set of RACH sub-configuration according to the priority of the respective RACH sub-configuration configured by the first node, and continue initiating Msg1 transmission on the resource defined by the second RACH sub-configuration. Here, the priority of the 4-step non-SBFD RACH sub-configuration can be lower than the priority of the second 4-step SBFD RACH sub-configuration, or the priority of the 4-step non-SBFD RACH sub-configuration can be higher than the priority of the second 4-step SBFD RACH sub-configuration; or the second node can decide by itself whether to fall back or switch to the 4-step non-SBFD RACH sub-configuration or the second 4-step SBFD RACH sub-configuration.

[0221] In some embodiments, if the fourth preset number threshold is configured, the second node ignores the conventional transmission number threshold for falling back from the 2-step RACH configuration to the 4-step RACH configuration.

[0222] In some embodiments, the fourth preset number threshold and the third preset number threshold above cannot be configured to the second node at the same time, or are applied by the second node at the same time.

[0223] In some embodiments, the above-mentioned fallback or switching RACH configuration manner can be respectively for the CBRA or CFRA scenario.

[0224] In some embodiments, for each of the above-mentioned switching / fallback scenarios or for the overall switching / fallback function, the first node can show whether to allow such switching / fallback. Exemplarily, the first node can use RRC signaling, MAC CE or DCI to make such indication.

[0225] Alternatively, for each of the above-mentioned switching / fallback scenarios or for the overall switching / fallback function, it is specified by the protocol whether the second node can make such switching / fallback.

[0226] Example 3, the SBFD RACH configuration includes a first SBFD RACH configuration and a second SBFD RACH configuration, and the case of random access failure of the second node.

[0227] In some embodiments, the first node can simultaneously configure the first SBFD RACH configuration and the second SBFD RACH configuration, but the second node can only select to send Msg1 / MsgA on the RACH resource specified in one configuration.

[0228] In some embodiments, after selecting a certain configuration, the second node can be allowed to switch to another set of configurations to continue sending Msg1 / MsgA when certain conditions occur.

[0229] In some embodiments, the second node can switch between the first SBFD RACH configuration and the second SBFD RACH configuration.

[0230] In some embodiments, the first node configures a switching threshold N1, which can be understood as a repeated transmission failure number threshold N1 of the second node switching from the first set of RACH configurations to the second set of RACH configurations. Exemplarily, if the second node fails to initiate Msg1 / MsgA for N1 times in one of the first SBFD RACH configuration and the second SBFD RACH configuration, the second node can switch to the other configuration to continue to try.

[0231] In some embodiments, the second node initially selects the second SBFD RACH configuration to initiate Msg1 / MsgA, but fails to continuously transmit Msg1 / MsgA (i.e., does not receive Msg2 / MsgB response) for more than N1 times, the second node can switch to the first SBFD RACH configuration for further attempts. Additionally, such switching is only allowed once before declaring the failure of this random access.

[0232] In some embodiments, the above switching is limited within the 4-step random access manner or the 2-step random access manner. Or in other words, the above switching does not cross the 4-step random access manner or the 2-step random access manner. For example, it can switch from the first 4-step SBFD RACH configuration to the second 4-step SBFD RACH configuration; for another example, it can switch from the first 2-step SBFD RACH configuration to the second 2-step SBFD RACH configuration.

[0233] In some embodiments, in the case of failure of random access based on the first set of RACH configurations, the second node performs random access based on the second set of RACH configurations.

[0234] In some embodiments, each set of RACH configurations in the multiple sets of RACH configurations includes at least one RACH sub-configuration, and in the case of failure of random access based on the first set of RACH sub- configurations, the second node performs random access based on the second set of RACH sub- configurations.

[0235] In some embodiments, in the case of failure of random access in the first SBFD RACH configuration, the second node can switch to the second SBFD RACH configuration or the non-SBFD RACH configuration to reattempt random access.

[0236] In some embodiments, within the 4-step random access manner or the 2-step random access manner, the base station can configure the priority of the two cases of fallback from the first SBFD RACH configuration to the non-SBFD RACH configuration or switching to the second SBFD RACH configuration.

[0237] In some embodiments, the priority of the non-SBFD RACH configuration and the second SBFD RACH configuration is configured by the first node or default.

[0238] In some embodiments, the priority of the non-SBFD RACH configuration and the second SBFD RACH configuration is implicitly indicated by the first node.

[0239] In some embodiments, the priority of the non-SBFD RACH configuration and the second SBFD RACH configuration is implicitly indicated by the first node.

[0240] Exemplarily, the priority of the non-SBFD RACH configuration and the second SBFD RACH configuration is determined implicitly based on a threshold N of the number of repeated transmission failures of the second node from the SBFD RACH configuration to the non-SBFD RACH configuration, and a threshold N1 of the number of repeated transmission failures of the second node from the first set of RACH configurations to the second set of RACH configurations, and N and N1 are configured by the first node. N and N1 are positive integers. At this time, the first node can implicitly configure the priority by the size of the configured threshold of the number of repeated transmission failures.

[0241] In some embodiments, the first set of RACH configurations is the first SBFD RACH configuration, and the multiple sets of RACH configurations include the second SBFD RACH configuration and the non-SBFD RACH configuration in addition to the first set of RACH configurations; here, in the case that N is greater than N1, the priority of the second SBFD RACH configuration is higher than that of the non-SBFD RACH configuration; in the case that N is less than N1, the priority of the second SBFD RACH configuration is lower than that of the non-SBFD RACH configuration; and in the case that N is equal to N1, the priority of the second SBFD RACH configuration and the priority of the non-SBFD RACH configuration are determined by the second node.

[0242] Exemplarily, as shown in FIG. 5, taking the threshold N of the number of repeated transmission failures of the first SBFD RACH configuration to the non-SBFD RACH configuration as N2, then:

[0243] The first node can configure N1 < N2, that is, the second node switches from the first SBFD RACH configuration to the second SBFD RACH configuration after N1 attempts. In addition, when the second node continues to attempt N3 times and still fails, the second node switches from the second SBFD RACH configuration to the non-SBFD RACH configuration; here, N3 is the threshold of the number of repeated transmission failures of the second SBFD RACH configuration to the non-SBFD RACH configuration; or,

[0244] The first node configures N1 > N2, that is, the second node switches from the first SBFD RACH configuration to the non-SBFD RACH configuration after N2 attempts; or,

[0245] The first node configures N1 = N2, and whether the second node switches from the first SBFD RACH configuration to the second SBFD RACH configuration or the conventional RACH configuration depends on the decision of the second node itself.

[0246] In some embodiments, the base station can configure the priority of fallback from the second SBFD RACH configuration to the non-SBFD RACH configuration or switching to the first SBFD RACH configuration in the 4-step random access manner or the 2-step random access manner.

[0247] In some embodiments, the priority of the non-SBFD RACH configuration and the first SBFD RACH configuration is configured by the first node or default.

[0248] In some embodiments, the priority of the non-SBFD RACH configuration and the first SBFD RACH configuration is implicitly indicated by the first node.

[0249] In some embodiments, the priority of the non-SBFD RACH configuration and the first SBFD RACH configuration is implicitly indicated by the first node.

[0250] Exemplarily, the priority of the non-SBFD RACH configuration and the first SBFD RACH configuration is implicitly determined based on a threshold N of the number of repeated transmission failures of the second node fallback from the SBFD RACH configuration to the non-SBFD RACH configuration, and a threshold N1 of the number of repeated transmission failures of the second node switching from the first set of RACH configurations to the second set of RACH configurations, N and N1 being configured by the first node. N and N1 are positive integers. At this time, the first node can implicitly configure the priority by the size of the configured threshold of the number of repeated transmission failures.

[0251] In some embodiments, the first set of RACH configurations is the second SBFD RACH configuration, and the multiple sets of RACH configurations include the first SBFD RACH configuration and the non-SBFD RACH configuration in addition to the first set of RACH configurations; here, in the case that N is greater than N1, the priority of the first SBFD RACH configuration is higher than that of the non-SBFD RACH configuration; in the case that N is less than N1, the priority of the first SBFD RACH configuration is lower than that of the non-SBFD RACH configuration; in the case that N is equal to N1, the priority of the first SBFD RACH configuration and the priority of the non-SBFD RACH configuration are determined by the second node.

[0252] Exemplarily, as shown in FIG. 5, taking the threshold N of the number of repeated transmission failures of fallback from the second SBFD RACH configuration to the non-SBFD RACH configuration as N3 for example, then:

[0253] The first node can configure N1 < N3, that is, the second node switches from the second SBFD RACH configuration to the first SBFD RACH configuration after N1 attempts, and additionally, the second node switches from the first SBFD RACH configuration to the non-SBFD RACH configuration when N2 attempts still fail, where N2 is a threshold of the number of repeated transmission failures for the first SBFD RACH configuration to fall back to the non-SBFD RACH configuration; or

[0254] The first node configures N1 > N3, that is, the second node switches from the second SBFD RACH configuration to the non-SBFD RACH configuration after N3 attempts; or

[0255] The first node configures N1 = N3, and whether the second node switches from the second SBFD RACH configuration to the first SBFD RACH configuration or a traditional RACH configuration depends on the decision of the second node.

[0256] Therefore, the threshold of the number of repeated transmission failures associated with each configuration is used to achieve the switching priority configuration associated with each configuration by the first node.

[0257] In some embodiments, the SBFD information includes fallback information of the second node, and the fallback information is used to indicate how to fall back from the SBFD resource RA to other RA modes.

[0258] In some embodiments, the fallback information is included in the perRAAtempInfo.

[0259] The above describes the fallback and switching. In some embodiments, after receiving the SBFD information sent by the second node, the first node performs network self-optimization based on the SBFD information, for example, adjusts the resource configuration based on the SBFD information to perform network self-optimization.

[0260] Based on the embodiment shown in FIG. 2, after receiving the SBFD information sent by the second node, the first node can perform network self-optimization based on the SBFD information. It should be understood that the SBFD information sent by the second node is related to network quality, and the first node performs network self-optimization based on the SBFD information, which can be more targeted than the network self-optimization based on the set network optimization strategy in the related art, thereby improving the network self-optimization effect.

[0261] In a wireless communication system, time domain resources in time division duplex (TDD) are allocated between downlink and uplink. Allocating limited time length for uplink in TDD results in reduced coverage, increased latency and reduced capacity. As a possible enhancement to this limitation of traditional TDD operation, the feasibility of allowing downlink and uplink to exist simultaneously (also known as full duplex) is worth studying, or more specifically, SBFD or in-band full-duplex (IBFD) at the gNB side within the traditional TDD band. Then, for some symbols configured as semi-static downlink resources or flexible resources, a part of frequency resources can be configured as UL resources, for example, UL subband / UL available PRB. The downlink or flexible symbols configured with UL subband can be referred to as full duplex symbols. Or, for some symbols configured as semi-static uplink resources or flexible resources, a part of frequency resources can be configured as DL resources, for example, DL subband / DL available PRB. The uplink or flexible symbols configured with DL subband can also be referred to as full duplex symbols. No matter which way, uplink and downlink will appear on different frequency domain resources of the same time domain resource, as shown in FIG. 6, the frame structure is configured as DDDFU, and some frequency domain resources in part of the downlink resources and / or flexible resources (such as slots 1-3) are configured as uplink subbands (UL subband).

[0262] For a full-duplex-capable UE, i.e., a full-duplex-capable UE (SBFD UE), the UL subband / UL available PRB in the full-duplex symbol can be used for uplink transmission, and for a UE without full-duplex capability, only conventional UL symbols or flexible symbols can be used for uplink transmission. The uplink transmission in the access process includes PRACH signals, msg3 PUSCH (including initial transmission and retransmission), and HARQ-ACK of msg4 PDSCH, etc. In the full-duplex scenario, the full-duplex symbol and the conventional UL symbol or the flexible symbol can extend the total uplink transmission time domain resource, so as to increase the available random access resource or enhance the coverage of the random access signal.

[0263] And in the cell using full-duplex technology, other cells of the same frequency or different frequency may cause interference to the uplink and downlink transmission of the cell, as shown in FIG. 7, symbol 3 of cell-1 is a DL symbol, symbol 3 of cell-2 has both downlink resources and uplink resources, symbol 3 is an SBFD symbol, and the unallocated resources in symbol 3 may contain gap subbands, but the unallocated resources are not necessarily all gap subbands. Symbols 4 and 5 are another way of subband allocation, with DL or UL subbands in the middle and other transmission direction subbands on both sides.

[0264] The downlink transmission of cell-1 on 3 can cause impact on the uplink transmission of cell-2, which is called cross-link interference (CLI). Therefore, certain mechanisms are needed to complete CLI cancellation. Here, the RAN node where cell-1 is located is the aggressor RAN node, and the RAN node where cell-2 is located is the victim RAN node.

[0265] To complete CLI cancellation, in some embodiments, as shown in FIG. 8, the method can further include the following steps:

[0266] S201, sending configuration information to a third node.

[0267] Here, the third node is a node adjacent to the first node. In combination with the communication system shown in FIG. 1 above, in the case where the first node is the base station 21, the third node can be the base station 22.

[0268] In some embodiments, the configuration information is used to characterize the SBFD resource configuration of the first node.

[0269] In some embodiments, the configuration information is CLI-management information (MI).

[0270] In some embodiments, the SBFD resource configuration includes at least one of the following:

[0271] Random access configuration under the SBFD resource configuration;

[0272] Bandwidth part configuration under the SBFD resource configuration.

[0273] Here, the random access configuration under the SBFD resource configuration includes at least one of the following:

[0274] Shared random access configuration under the SBFD resource configuration;

[0275] Dedicated random access configuration under the SBFD resource configuration.

[0276] The bandwidth part configuration under the SBFD resource configuration includes at least one of the following:

[0277] Shared bandwidth part (BWP) configuration under the SBFD resource configuration;

[0278] Dedicated bandwidth part configuration under the SBFD resource configuration.

[0279] For the description of the random access configuration under the SBFD resource configuration, reference can be made to the description of the multiple sets of SBFD RACH configurations in the embodiment shown in FIG. 2, which will not be repeated here.

[0280] In some embodiments, the random access configuration described above includes at least one of the following: a legacy random access resource, a shared random access resource, or a random access resource dedicated to SBFD UEs. The BWP configuration includes: a transmitted BWP configuration, a shared BWP configuration, or a BWP configuration dedicated to SBFD UEs.

[0281] In some embodiments, the configuration information further includes at least one of the following:

[0282] The indication information for indicating whether the random access function under the SBFD resource configuration is enabled, which can be understood as the switch of the random access function, i.e., whether the UE of the cell is allowed to use the SBFD RACH configuration or the SBFD BWP configuration for random access;

[0283] SBFD resource configuration and random access configuration for a normal carrier or a supplementary uplink carrier.

[0284] Here, the indication information for indicating whether the random access function under the SBFD resource configuration is enabled can be understood as the switch of the random access function, i.e., whether the UE of the cell is allowed to use the SBFD RACH configuration or the SBFD BWP configuration for random access. It should be understood that in the cross-operator scenario, the two adjacent base stations may belong to different operators, and the operator may choose to close the entire SBFD configuration of the cell, therefore, the configuration information can include an activation indication or a deactivation indication.

[0285] Based on the embodiment shown in FIG. 8, the first node sends configuration information for characterizing the SBFD resource configuration of the first node to the third node, so that the third node can refer to the configuration information when performing the SBFD resource configuration of the third node, so that the SBFD resource configuration of the third node avoids the SBFD resource configuration of the first node as much as possible to avoid the situation of mutual interference, thereby achieving CLI elimination.

[0286] In some embodiments, as shown in FIG. 9, the embodiment of the present disclosure provides a communication method, which is applied to a second node, and the method can include the following steps:

[0287] S301, sending SBFD information to a first node.

[0288] In some embodiments, the SBFD information includes at least one of the following:

[0289] cell information of a target cell, the target cell comprising at least one of the following: a cell detected by the second node, a cell where radio link failure occurs, a cell where random access is initiated, a cell accessed by the second node;

[0290] SBFD resource configuration information of the target cell;

[0291] SBFD partial bandwidth configuration information of the target cell;

[0292] SBFD random access configuration information of the target cell;

[0293] information related to initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration;

[0294] information for selection under multiple different types of random access configuration or SBFD partial bandwidth configuration;

[0295] information for cell selection and reselection under SBFD random access configuration or SBFD partial bandwidth configuration;

[0296] indication information for indicating whether cross-link interference is detected under corresponding SBFD resource configuration or random access configuration;

[0297] measurement value of a cross-link interference reference signal detected under corresponding SBFD resource configuration or random access configuration;

[0298] resource position where interference is detected under corresponding SBFD resource configuration or random access configuration.

[0299] The following exemplary describes each item of information in the SBFD information.

[0300] In some embodiments, the information related to initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration comprises at least one of the following:

[0301] the number of times of initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration;

[0302] indication information for indicating whether conflict is detected when initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration;

[0303] indication information for indicating whether fallback or switching occurs when initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration;

[0304] A type of random access adopted after fallback or switching occurs when initiating random access in the SBFD random access configuration or the SBFD partial bandwidth configuration;

[0305] A reason for fallback or switching occurring when initiating random access in the SBFD random access configuration or the SBFD partial bandwidth configuration;

[0306] Indication information for indicating whether initiating random access in the SBFD random access configuration or the SBFD partial bandwidth configuration is successful;

[0307] Indication information for indicating whether cross-link interference is monitored when initiating random access in the SBFD random access configuration or the SBFD partial bandwidth configuration;

[0308] A measurement value of a cross-link interference reference signal monitored when initiating random access in the SBFD random access configuration or the SBFD partial bandwidth configuration.

[0309] In some embodiments, the target cell information includes at least one of the following:

[0310] A physical cell identifier;

[0311] A new radio cell global identifier;

[0312] A frequency.

[0313] For specific descriptions of each item of SBFD information, refer to the corresponding descriptions in the embodiments shown in FIG. 2 above, which will not be repeated here.

[0314] The above embodiments are described by taking how to improve the network self-optimization effect and how to complete CLI elimination as examples to describe a communication method provided by the embodiments of the present disclosure.

[0315] In some embodiments, the second node (such as a UE) can report some data transmission status information to the network, which can be the status of a packet data convergence protocol (PDCP) sequence number. The sequence number status information includes PDCP service data unit (SDU) discard information, such as a minimum count value associated with discarded PDCP SDUs or a count value associated with discarded PDCP SDUs. The sequence number status information can be sent in the following cases: packet discard occurs, or discarded packets have not been submitted to a lower layer such as a radio link control layer, or cell switching occurs.

[0316] In some embodiments, as shown in FIG. 10, a schematic diagram of an architecture of a next generation radio access network (NG-RAN) provided according to an embodiment of the present disclosure is provided, referring to FIG. 10, the NG-RAN architecture can deploy a NR femtocell gateway (Femto GW) to allow the NG interface between the NR femto node (i.e. home base station) and the 5th generation core network (5GC) to support a large number of NR femto nodes in an expandable manner. The NR Femto GW acts as a concentrator for the control plane, especially the NG-C interface. Here, the SeGW in FIG. 10 is a security gateway (SeGW).

[0317] The NG interface is defined as the following interfaces:

[0318] The interface between the NR Femto GW and the 5GC;

[0319] The interface between the NR Femto node and the NR Femto GW;

[0320] The interface between the NR Femto node and the 5GC (although the directness of this interface can be implemented through the NR Femto GW, it is essentially part of the NG interface).

[0321] From the perspective of the access and mobility management function (AMF), the NR Femto GW behaves like a gNB. And for the NR Femto node, the NR Femto GW behaves like an AMF. Whether the NR Femto node connects to the 5GC through the NR Femto GW or not, the NG interface between the NR Femto node and the 5GC is the same.

[0322] In short, the NR Femto GW acts as a bridge in the NG-RAN architecture, allowing a large number of NR Femto nodes to communicate with the 5GC in an expandable and efficient manner without each node directly interacting with the core network, thus simplifying the network structure and reducing complexity. However, the signaling overhead of signaling interaction between the NR Femto GW and the NR Femto node is large at present, and how to reduce the signaling overhead of signaling interaction between the NR Femto GW and the NR Femto node is a problem to be solved urgently.

[0323] Based on this, as shown in FIG. 11, the embodiment of the disclosure further provides a communication method, which is applied to a first node, the first node can be a home base station, for example, the first node can be any one of the NR Femto nodes shown in FIG. 10, and the method can include the following steps:

[0324] S401, receiving multicast broadcast service information sent by a fourth node under a preset condition.

[0325] Here, the fourth node is a gateway, for example, the first node can be the NR Femto GW shown in FIG. 10.

[0326] The preset condition includes that a cell associated with the multicast broadcast service information is a cell associated with the first node. That is, when forwarding the multicast broadcast service information to the first node, the fourth node can first determine a target cell associated with a multicast broadcast service session to which the multicast broadcast service information belongs, and if the target cell does not exist within the coverage range of a first node, the fourth node does not forward the multicast broadcast service information to the first node. That is, in the case that the cell associated with the multicast broadcast service information is the cell associated with the first node, the fourth node sends the multicast broadcast service information to the first node. In the case that the cell associated with the multicast broadcast service information is not the cell associated with the first node, the fourth node does not send the multicast broadcast service information to the first node.

[0327] In this way, compared with the related art in which the fourth node sends the multicast broadcast service information to the first node regardless of whether the cell associated with the multicast broadcast service information is the cell associated with the first node, the number of signaling interactions between the first node and the fourth node is reduced, thereby reducing the signaling overhead of the signaling interaction between the first node and the fourth node, that is, reducing the signaling overhead of the signaling interaction between the NR Femto GW and the NR Femto node.

[0328] It should be understood that for the installation of the home base station, it is not uniformly planned and installed by the operator, and therefore, the core network side is not clear about the location of the home base station, or can only obtain a relatively wide location of the home base station. In some embodiments, in order to enable the core network side to obtain a relatively accurate location of the home base station, as shown in FIG. 12, the method can further include the following steps:

[0329] S501, sending user location information to the fourth node.

[0330] Here, the user location information (ULI) includes a virtual location of the first node.

[0331] The virtual position of the first node is obtained based on the following steps: the first node acquires the position of the accessed second node, i.e., the position of the accessed UE, and takes the position of the UE as the virtual position of the first node. Further, in order to improve the accuracy of the virtual position of the first node, the first node acquires the positions of multiple accessed second nodes, and then takes the mean of the positions of the multiple second nodes as the virtual position of the first node. Then, the first node puts the virtual position of the first node or the mapped cell ID of the virtual position of the first node into the existing user location information, and sends the user location information to the fourth node, so that the fourth node and the core network after the fourth node know the position of the first node.

[0332] In some embodiments, the core network side can also know the position of the first node through the following examples:

[0333] Example 1, the core network discovers that a second node accesses a first node, i.e., the second node accesses a home base station, and then the core network can initiate location verification of the second node. For example, the location of the second node is verified by a location management function (LMF), and then the obtained position of the second node is taken as the position of the Femto node, i.e., the position of the first node, so that the core network can know the position of the first node without interacting with the first node.

[0334] Example 2, after the core network operates and maintains (OAM) the first node, the core network identifies the geographic position of the first node through the IP address of the first node identified by the OAM, or the first node reports its own geographic position to the OAM, and then the core network knows the area where the first node is located, and thus knows the position corresponding to the first node.

[0335] In some embodiments, in the network architecture shown in FIG. 10, since the NR Femto GW is introduced, the network element selection by the NR Femto GW can be considered, and how to implement the network element selection by the NR Femto GW is a problem to be solved. Based on this, as shown in FIG. 13, the method can further include the following steps:

[0336] S601, sending network element selection information to the fourth node.

[0337] Here, the network element selection information is used for the fourth node to select the network element.

[0338] The network element selection information includes at least one of the following:

[0339] An access and mobility management function region identity and an access and mobility management function set identity (AMF Region ID and AMF Set ID derived from GUAMI) derived from a global unique access and mobility management function identity;

[0340] A requested network slice selection information (Requested NSSAI);

[0341] Local operator policies;

[0342] 5G cellular internet of things features (5G CIoT features indicated in RRC signalling by the UE) indicated by the user equipment in radio resource control signaling;

[0343] Integrated access and backhaul indication (IAB-indication);

[0344] Narrowband internet of things radio access technology type (NB-IoT RAT Type);

[0345] Category M indication;

[0346] New radio reduced capability indication (NR RedCap Indication);

[0347] A network public network onboarding indication (NPN Onboarding indication as indicated in RRC signalling by the UE) indicated by the user equipment in radio resource control signaling.

[0348] Correspondingly, the fourth node can perform network element selection based on the network element selection information after receiving the network element selection information, for example, the fourth node performs selection of an AMF network element.

[0349] In this way, the fourth node performs network element selection, that is, the NR Femto GW performs network element selection.

[0350] The above embodiments are described by taking the application of the communication method to the first node as an example. In some embodiments, the present disclosure also provides a communication method applied to the fourth node, which can include the following steps:

[0351] A1. In a case where a preset condition is met, the first node is sent multicast broadcast service information.

[0352] Here, the preset condition includes that a cell associated with the multicast broadcast service information is a cell associated with the first node.

[0353] For a specific description of the preset condition, refer to the corresponding description in the embodiment shown in FIG. 11 above, which is not repeated here.

[0354] In some embodiments, the fourth node receives user location information sent by the first node. Here, the user location information includes a virtual location of the first node. The fourth node can determine the location of the first node based on the virtual location of the first node included in the user location information.

[0355] In some embodiments, the fourth node receives network element selection information sent by the first node, and the network element selection information is used for the fourth node to perform network element selection. After receiving the network element selection information, the fourth node can perform network element selection based on the network element selection information, for example, reselection of an AMF network element. In this way, the fourth node performs network element selection.

[0356] The network element selection information includes at least one of:

[0357] An access and mobility management function area identifier and an access and mobility management function set identifier derived from a globally unique access and mobility management function identifier;

[0358] Requested network slice selection information;

[0359] Local operator policy;

[0360] 5G cellular internet of things function indicated by the user equipment in radio resource control signaling;

[0361] Integrated access and backhaul indication;

[0362] Narrowband internet of things radio access technology type;

[0363] M-type indication;

[0364] New radio simplified device indication;

[0365] Specific network public network onboarding indication indicated by the user equipment in radio resource control signaling.

[0366] The above describes the solutions provided by the embodiments of the present disclosure from the method aspect. To implement the above functions, hardware structures and / or software modules corresponding to the functions are included. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a certain function is implemented in hardware or computer software driven hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present disclosure.

[0367] The embodiments of the present disclosure can divide the function modules of the first node or the second node according to the above method embodiments. For example, each function module can be divided according to each function, or two or more functions can be integrated in one function module. The above integrated module can be implemented in the form of hardware or software. It should be noted that the division of the modules in the embodiments of the present disclosure is illustrative, and is only a logical function division. In actual implementation, another division method can be used. The following takes dividing each function module according to each function as an example for description.

[0368] FIG. 14 is a block diagram of a communication apparatus according to an embodiment of the present disclosure. As shown in FIG. 14, the communication apparatus 70 includes a receiving unit 701. In some embodiments, the communication apparatus 70 further includes a sending unit 702.

[0369] The communication apparatus 70 can be the first node or a chip of the first node. When the communication apparatus 70 is used to implement the functions of the first node in the above embodiments, each unit is specifically configured to implement the following functions.

[0370] The receiving unit 701 is configured to receive SBFD information sent by a second node.

[0371] The sending unit 702 is configured to send configuration information to a third node.

[0372] FIG. 15 is a block diagram of another communication apparatus according to an embodiment of the present disclosure. As shown in FIG. 15, the communication apparatus 80 includes a sending unit 801.

[0373] The communication apparatus 80 can be the second node or a chip of the second node. When the communication apparatus 80 is used to implement the functions of the second node in the above embodiments, each unit is specifically configured to implement the following functions.

[0374] The sending unit 801 is configured to send SBFD information to a first node.

[0375] FIG. 16 is a block diagram of another communication apparatus provided by an embodiment of the present disclosure. As shown in FIG. 16, the communication apparatus 90 includes a receiving unit 901. In some embodiments, the communication apparatus 70 further includes a sending unit 902.

[0376] The communication apparatus 90 can be the first node or a chip of the first node. When the communication apparatus 90 is used to implement the functions of the second node in the above-mentioned embodiments, each unit is specifically configured to implement the following functions.

[0377] The receiving unit 901 is configured to receive multicast broadcast service information sent by the fourth node in a case where a preset condition is met, and the preset condition includes that a cell associated with the multicast broadcast service information is a cell associated with the first node.

[0378] In some embodiments, the sending unit 902 is configured to send user location information to the fourth node, and the user location information includes a virtual location of the first node.

[0379] In some embodiments, the sending unit 902 is configured to send network element selection information to the fourth node, and the network element selection information is used for network element selection of the fourth node.

[0380] It should be noted that the units in FIGS. 14 to 16 can also be referred to as modules, for example, the obtaining unit can be referred to as an obtaining module. In addition, in the embodiments shown in FIGS. 14 to 16, the names of the units can also be different from those shown in the figures, for example, the sending unit can also be referred to as a communication unit, and the receiving unit can also be referred to as a communication unit.

[0381] If each unit in FIGS. 14 to 16 is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present disclosure essentially or said part that makes contributions to the prior art, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods in the various embodiments of the present disclosure. The storage medium storing the computer software product includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and various other media that can store program codes.

[0382] In the case that the communication apparatus 70, the communication apparatus 80 or the communication apparatus 90 realizes the functions of the above-mentioned integrated modules in the form of hardware, the embodiment of the present disclosure provides another block diagram of a communication apparatus. As shown in FIG. 17, the communication apparatus 100 includes a processor 1002, a communication interface 1003 and a bus 1004. In some embodiments, the communication apparatus 100 can further include a memory 1001.

[0383] The processor 1002 can be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, or other programmable logic device, transistor logic device, hardware component, or any combination thereof. The processor 1002 can realize or execute the various exemplary logical blocks, modules and circuits described in conjunction with the disclosure. The processor 1002 can also be a combination of components that realize computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor (DSP) and a microprocessor, and the like.

[0384] The communication interface 1003 is used to connect with other devices through a communication network. The communication network can be an Ethernet, a wireless access network, a wireless local area network (WLAN), and the like.

[0385] The memory 1001 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

[0386] In some embodiments, the memory 1001 can exist independently of the processor 1002, and the memory 1001 can be connected to the processor 1002 through the bus 1004 for storing instructions or program code. When the processor 1002 invokes and executes the instructions or program code stored in the memory 1001, the communication method provided by the embodiment of the present disclosure can be realized.

[0387] In some embodiments, the memory 1001 can also be integrated into the processor 1002.

[0388] The bus 1004 can be an extended industry standard architecture (EISA) bus, a peripheral component interconnect (PCI) bus, or other bus. The bus 1004 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in FIG. 17, but this does not mean that there is only one bus or only one type of bus.

[0389] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above division of functional modules is taken as an example, and in actual applications, the above functions can be completed by different functional modules according to needs, that is, the internal structure of the base station or the terminal is divided into different functional modules to complete all or part of the functions described above.

[0390] The embodiments of the present disclosure also provide a computer readable storage medium. All or part of the processes of the above method embodiments can be instructed by computer instructions to complete related hardware, and the program can be stored in the above computer readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The above computer readable storage medium can also be an external storage device of the above first node or second node, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, and the like. Further, the above computer readable storage medium can include both the internal storage unit of the above first node or second node and the external storage device. The above computer readable storage medium is used to store the above computer program and other programs and data required by the above first node or second node. The above computer readable storage medium can also be used to temporarily store data that has been output or will be output.

[0391] The embodiments of the present disclosure also provide a computer program product, which contains computer instructions, when the computer instructions run on a computer, make the computer execute any one of the communication methods provided in the above embodiments.

[0392] Although the present disclosure has been described in connection with certain embodiments, it will be understood that the application is capable of further modifications and that this application is intended to cover any variations, uses or adaptations of the application following, in general, the principles of the application and including such further modifications and equivalents as come within the scope of the application. Accordingly, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the application being set forth in the following claims.

[0393] Although the present disclosure has been described in connection with specific features thereof, it will be evident to an artisan of ordinary skill that various modifications and changes can be made to the application without departing from the spirit and scope thereof. Accordingly, it is intended that the present disclosure not be limited to the described embodiments, but that it include all modifications and alternatives in keeping with the scope and spirit as described. It will be clear to the artisan of ordinary skill that various changes and modifications can be made therein without departing from the spirit and scope of the present disclosure. Accordingly, the disclosure is intended to embrace all such alterations, modifications and variations which fall within the scope and spirit of the disclosure. It is further intended that the disclosure encompass any and all embodiments within the scope of the following claims.

[0394] The above, only for specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto, any in the technical scope of the present disclosure disclosed changes or replacement, should be covered within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be subject to the scope of protection of the claims.

Claims

1. A communication method, wherein, The method applied to a first node comprises: receiving sub-band full duplex (SBFD) information sent by a second node.

2. The method of claim 1, wherein, The SBFD information comprises at least one of the following: cell information of a target cell, the target cell comprising at least one of the following: a cell detected by the second node, a cell in which a radio link failure occurs, a cell from which a random access is initiated, a cell accessed by the second node; SBFD resource configuration information of the target cell; SBFD partial bandwidth configuration information of the target cell; SBFD random access configuration information of the target cell; information related to initiating a random access under SBFD random access configuration or SBFD partial bandwidth configuration; information for selection under multiple different types of random access configuration or SBFD partial bandwidth configuration; information for cell selection and reselection under SBFD random access configuration or SBFD partial bandwidth configuration; indication information for indicating whether cross-link interference is detected under corresponding SBFD resource configuration or random access configuration; a measurement value of a cross-link interference reference signal detected under corresponding SBFD resource configuration or random access configuration; a resource position at which interference is detected under corresponding SBFD resource configuration or random access configuration.

3. The method of claim 2, wherein, The information related to initiating a random access under SBFD random access configuration or SBFD partial bandwidth configuration comprises at least one of the following: a number of times of initiating a random access under SBFD random access configuration or SBFD partial bandwidth configuration; indication information for indicating whether a conflict is detected when a random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration; indication information for indicating whether a fallback or switching occurs when a random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration; a type of random access adopted after a fallback or switching occurs when a random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration; a reason for which a fallback or switching occurs when a random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration; indication information for indicating whether a random access is successful when a random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration; indication information for indicating whether cross-link interference is monitored when a random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration; a measurement value of a cross-link interference reference signal monitored when a random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration.

4. The method of claim 2 or 3, wherein, The cell information comprises at least one of the following: a physical cell identifier; a new radio cell global identifier; a frequency.

5. The method of any one of claims 1 to 4, wherein, The method further comprises: sending configuration information to a third node.

6. The method of claim 5, wherein, The configuration information is used to represent SBFD resource configuration.

7. The method of claim 6, wherein, The SBFD resource configuration comprises at least one of the following: random access configuration under SBFD resource configuration; bandwidth part configuration under SBFD resource configuration.

8. The method of claim 7, wherein, The random access configuration under SBFD resource configuration comprises at least one of the following: random access configuration under shared SBFD resource configuration; Random access configuration under the dedicated SBFD resource configuration.

9. The method of claim 7 or 8, wherein, The bandwidth part configuration under the SBFD resource configuration comprises at least one of the following: The bandwidth part configuration under the shared SBFD resource configuration; The bandwidth part configuration under the dedicated SBFD resource configuration.

10. The method of any one of claims 6-9, wherein, The configuration information further comprises at least one of the following: Indication information for indicating whether the random access function under the SBFD resource configuration is enabled; SBFD resource configuration and random access configuration for a normal carrier or a supplementary uplink carrier.

11. A communication method, wherein, The method applied to the second node comprises: Sending SBFD information to the first node.

12. A communication method, wherein, The method applied to the first node comprises: Receiving multicast broadcast service information sent by the fourth node under the condition that a preset condition is met, wherein the preset condition comprises that a cell associated with the multicast broadcast service information is a cell associated with the first node.

13. The method of claim 12, wherein, The method further comprises: Sending user location information to the fourth node, wherein the user location information comprises a virtual location of the first node.

14. The method of claim 12 or 13, wherein, The method further comprises: Sending network element selection information to the fourth node, wherein the network element selection information is used for network element selection by the fourth node.

15. The method of claim 14, wherein, The network element selection information comprises at least one of the following: Access and mobility management function area identifier and access and mobility management function set identifier derived from global unique access and mobility management function identifier; Requested network slice selection information; Local operator policy; 5G cellular internet of things function indicated by the user equipment in the radio resource control signaling; Integrated access and backhaul indication; Narrowband internet of things radio access technology type; M-type indication; New radio simplified device indication; Specific network public network access indication indicated by the user equipment in the radio resource control signaling.

16. A communications device, wherein Comprise: Memory and processor; Memory and processor are coupled; The memory is used to store instructions executable by the processor; The processor executes the instructions to perform the method of any one of claims 1-15.

17. A computer readable storage medium, wherein, The computer readable storage medium stores computer instructions, when the computer instructions run on the computer, make the computer execute the method of any one of claims 1-15, the computer readable storage medium, including non-transitory computer readable storage medium.

18. A computer program product, wherein, The computer program product contains computer instructions, when the computer instructions run on the computer, make the computer execute the method of any one of claims 1-15.

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