Communication method and device, storage medium and program product

Abstract

The embodiment of the invention provides a communication method and device, a storage medium and a program product, relates to the technical field of communication, and is used for improving a network self-optimization effect. The method comprises the following steps: receiving SBFD information sent by a second node;

Description

Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a communication method, device, storage medium and program product. Background Art

[0002] The fourth generation mobile communication technology (4G), long term evolution (LTE) or LTE-Advance (LTE-A) and fifth generation mobile communication technology (5G) are facing more and more demands. According to the current development trend, 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, currently in full-duplex mode, the network self-optimization effect is not good. Summary of the invention

[0003] The present disclosure provides a communication method, device, storage medium and program product for improving network self-optimization effect.

[0004] In order to achieve the above objectives, the present disclosure adopts the following technical solutions.

[0005] In a first aspect, a communication method is provided, which is applied to a first node, and the method includes:

[0006] Subband full duplex (SBFD) information sent by the second node is received.

[0007] In a second aspect, a communication method is provided, which is applied to a second node, and the method includes:

[0008] The SBFD information is sent to the first node.

[0009] According to a third aspect, a communication method is provided, which is applied to a first node, and the method includes:

[0010] Multicast / broadcast services (MBS) information sent by a fourth node is received when a preset condition is met. The preset condition includes that a cell associated with the multicast / broadcast services information is a cell associated with the first node.

[0011] In a fourth aspect, a communication device is provided, applied to a first node, including:

[0012] The receiving unit is configured to receive the SBFD information sent by the second node.

[0013] In a fifth aspect, a communication device is provided, applied to a second node, including:

[0014] The sending unit is configured to send the SBFD information to the first node.

[0015] In a sixth aspect, a communication device is provided, applied to a first node, including:

[0016] The receiving unit is configured to receive the multicast broadcast service information sent by the fourth node when a preset condition is met, wherein the preset condition includes that the cell associated with the multicast broadcast service information is the cell associated with the first node.

[0017] In the seventh aspect, a communication device is provided, comprising: a processor and a memory; the memory and the processor are coupled; the memory is used to store instructions executable by the processor, and the memory stores instructions executable by the processor; when the processor is configured to execute the instructions, the communication device implements the method provided in any one of the first to third aspects above.

[0018] In an eighth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer executes the method provided in any one of the first to third aspects.

[0019] In a ninth aspect, a computer program product comprising 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 to third aspects.

[0020] In the embodiment of the present disclosure, after the first node receives 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 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide further understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation on the technical solution of the present disclosure.

[0022] Figure 1 A schematic diagram of the structure of a communication system provided by an embodiment of the present disclosure;

[0023] Figure 2 A flow chart of a communication method provided by an embodiment of the present disclosure;

[0024] Figure 3 A schematic diagram of SBFD RACH configuration provided by an embodiment of the present disclosure;

[0025] Figure 4 A schematic diagram of another SBFD RACH configuration provided by an embodiment of the present disclosure;

[0026] Figure 5 A schematic diagram of another SBFD RACH configuration provided by an embodiment of the present disclosure;

[0027] Figure 6 A schematic diagram of a frame structure provided in an embodiment of the present disclosure;

[0028] Figure 7 A schematic diagram of cross-link interference provided by an embodiment of the present disclosure;

[0029] Figure 8 A flowchart of another communication method provided by an embodiment of the present disclosure;

[0030] Fig. 9 A flowchart of another communication method provided by an embodiment of the present disclosure;

[0031] Fig.10 A schematic diagram of an NG-RAN architecture provided in an embodiment of the present disclosure;

[0032] Fig.11 A flowchart of another communication method provided by an embodiment of the present disclosure;

[0033] Fig.12 A flowchart of another communication method provided by an embodiment of the present disclosure;

[0034] Fig.13 A flowchart of another communication method provided by an embodiment of the present disclosure;

[0035] Fig.14 A schematic diagram of the composition of a communication device provided in an embodiment of the present disclosure;

[0036] Fig.15A schematic diagram of another communication device provided in an embodiment of the present disclosure;

[0037] Fig.16 A schematic diagram of another communication device provided in an embodiment of the present disclosure;

[0038] Fig.17 A schematic diagram of the structure of a communication device provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0040] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and other forms such as the third person singular form "comprises" and the present participle form "comprising" are to be interpreted as open, inclusive, that is, "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 indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0041] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0042] In the embodiments of the present disclosure, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present disclosure should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0043] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0044] In the current full-duplex communication system, the network performs self-optimization based on a pre-set network optimization strategy, resulting in poor network liberalization effects.

[0045] Based on this, the embodiments of the present disclosure provide 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 can be self-optimized in a targeted manner, thereby improving the network self-optimization effect.

[0046] The embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0047] The technical solution provided by the embodiments of the present disclosure can be applied to various communication systems supporting TSN, for example, a new radio (NR) communication system using 5G communication technology.

[0048] The future evolution system, long term evolution (LTE) or multiple communication convergence systems, etc., are not limited in the embodiments of the present disclosure.

[0049] Figure 1 FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present disclosure. Figure 1 As shown, the communication system 10 includes multiple base stations (e.g., base station 21 and base station 22) and multiple terminals (e.g., terminal 31, terminal 32, terminal 33, and terminal 34). The multiple base stations and the multiple terminals may be connected via a wired network or a wireless network. The wired network or the wireless network may include a router, a switch, or other devices that facilitate communication between the multiple base stations and the multiple terminals, which is not limited in the embodiments of the present disclosure.

[0050] In some embodiments, the base station is used to provide wireless access services for multiple terminals. Specifically, a base station provides a service coverage area (also called a cell). Terminals entering the area can communicate with the base station through wireless signals to receive wireless access services provided by the base station. There may be overlaps between the service coverage areas of the base station 21, and terminals in the overlapping areas can receive wireless signals from multiple base stations.

[0051] In some embodiments, each of the multiple base stations may be connected to multiple terminals, for example, base station 21 is connected to terminal 31 and terminal 32. Terminal 31 and terminal 32 may be located in the same cell, or in different cells. That is, a base station may provide network services to a terminal in one cell, or may provide network services to terminals in multiple cells at the same time.

[0052] In some embodiments, each of the multiple base stations (e.g., base station 11) may be an evolution node B (eNB), a next generation node B (gNB), a transmission receive point (TRP), a transmission point (TP), a home base station, and any other access node. According to the size of the service coverage area provided, the base station can be divided into a macro base station for providing macrocells, a micro base station for providing picocells, and a femtocell for providing femtocells. With the continuous evolution of wireless communication technology, future base stations may also adopt other names.

[0053] In some embodiments, each of the multiple terminals (such as terminal 31) may be a device with wireless transceiver function, 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), etc. The embodiments of the present disclosure do not limit the specific types of terminal devices.

[0054] It should be understood that Figure 1 is an exemplary structural diagram, Figure 1 The number of devices included in the communication system shown is not limited, for example, the number of base stations is not limited and the number of terminals is not limited. Figure 1In addition to the equipment shown, Figure 1 The communication system shown may also include other devices, which is not limited to this.

[0055] Next, if Figure 2 As shown, the embodiment of the present disclosure provides a communication method, which is applied to a first node, and the first node may be the above Figure 1 For any one of the multiple base stations shown, such as base station 21, the method may include the following steps:

[0056] S101: Receive SBFD information sent by a second node.

[0057] The second node may be a second node within the network coverage of the first node. Figure 1 In the communication system shown, when the first node is a base station 21 , the second node may be a terminal 31 .

[0058] As an example, after the first node sends request information for requesting SBFD information of the second node to the second node, the second node responds to the request information and sends SBFD information to the first node. Accordingly, the first node receives the SBFD information sent by the second node.

[0059] As another example, the second node periodically sends SBFD information to the first node. Correspondingly, the first node receives the SBFD information periodically sent by the second node.

[0060] In some embodiments, when 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 information to the DU.

[0061] In some embodiments, after receiving the SBFD information, the first node may share the received SBFD information with other network nodes, such as other base stations.

[0062] In some embodiments, the SBFD information includes at least one of the following:

[0063] Cell information of the target cell, wherein the target cell includes at least one of the following: a cell detected by the second node, a cell where a radio link failure has occurred, a cell where random access has been initiated, and a cell accessed by the second node;

[0064] SBFD resource configuration information of the target cell;

[0065] SBFD bandwidth part (BWP) configuration information of the target cell;

[0066] SBFD random access configuration information of the target cell;

[0067] Information related to initiating random access in SBFD random access configuration or SBFD partial bandwidth configuration;

[0068] Information for selecting between multiple different types of random access configurations or SBFD fractional bandwidth configurations;

[0069] Information used for cell selection and reselection in SBFD random access configuration or SBFD partial bandwidth configuration;

[0070] Indication information used to indicate whether cross-link interference is detected under the corresponding SBFD resource configuration or random access configuration;

[0071] A measured value of a cross-link interference reference signal detected under a corresponding SBFD resource configuration or random access configuration;

[0072] Under the corresponding SBFD resource configuration or random access configuration, the interfering resource position is detected.

[0073] 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 partial bandwidth configuration can be replaced by BWP configuration, which are the same concepts. The random access configuration, partial bandwidth configuration or SBFD resource configuration involved in the embodiments of the present disclosure is configuration information obtained by the second node from the network.

[0074] The following is an explanation of each item of information contained in the SBDF information.

[0075] V0, the SBFD partial bandwidth configuration information of the target cell includes but is not limited to at least one of the following:

[0076] bandwidth;

[0077] The offset from the starting point (such as point A);

[0078] Subcarrier spacing;

[0079] Indication information used to indicate that the partial bandwidth configuration is a partial bandwidth configuration used to initiate random access;

[0080] The indication information is used to indicate the type of the partial bandwidth configuration, where the type of the partial bandwidth configuration includes a shared partial bandwidth configuration or a dedicated partial bandwidth configuration.

[0081] V1. The SBFD resource configuration information of the target cell includes but is not limited to at least one of the following:

[0082] Subcarrier spacing;

[0083] The number of physical resource blocks (PRBs) contained in a subband;

[0084] The bandwidth of the downlink subband, uplink subband or guard subband, that is, the number of consecutive PRBs;

[0085] The starting position of the downlink subband, uplink subband or protection subband, such as the starting PRB;

[0086] The starting offset of the downlink subband or uplink subband or guard subband, such as the frequency offset in the frequency domain between Point A (lowest subcarrier of common RB 0) and the location of corresponding subband in number of PRBs;

[0087] Subband index and / or subband type (e.g., downlink subband or uplink subband or protection subband or flexible subband, dedicated subband configured for UE);

[0088] PRB index and / or PRB type (e.g., downlink PRB or uplink PRB or protection PRB or flexible PRB or dedicated PRB configured for UE);

[0089] The number of one subband type. For example, two downlink subbands are included.

[0090] V2. Information for selection or switching under multiple different types of SBFD random access configurations or SBFD partial bandwidth configurations includes but is not limited to at least one of the following:

[0091] 1. Priority information: SBFD random access configuration or SBFD partial bandwidth configuration may include a priority, and the second node may select the configuration according to the priority;

[0092] 2. Reference signal receiving power (RSRP) threshold information, used to select the SBFD RACH configuration or SBFD BWP configuration to be used according to the RSRP of the cell;

[0093] 3. After access fails using the current configuration, the next SBFD RACH configuration or SBFD BWP configuration that should be rolled back or switched, or the next RACH configuration type or BWP configuration type that should be rolled back or switched.

[0094] V3. The information related to initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration includes at least one of the following:

[0095] The number of random access initiations under SBFD random access configuration or SBFD partial bandwidth configuration, or the number of message 1 (message1, msg1) / msgA initiations under SBFD random access configuration or SBFD partial bandwidth configuration;

[0096] Indication information for indicating whether a conflict is detected when initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration, such as when initiating contention-based random access, contention with random access of other second nodes is found during the random access process;

[0097] Indication information used to indicate whether a fallback or switch occurs when random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration;

[0098] The type or configuration of the random access configuration or SBFD partial bandwidth configuration used after fallback or switchover occurs when random access is initiated under the SBFD random access configuration or SBFD partial bandwidth configuration;

[0099] The reason for fallback or switching when initiating random access in SBFD random access configuration or SBFD partial bandwidth configuration, such as reaching the maximum number of transmissions or receiving instructions from the network;

[0100] Indication information used to indicate whether random access is successfully initiated under SBFD random access configuration or SBFD partial bandwidth configuration;

[0101] Indication information used to indicate whether cross-link interference is detected when initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration;

[0102] Initiate random access under SBFD random access configuration or SBFD partial bandwidth configuration to monitor the measurement value of the cross-link interference reference signal, such as channel state information-reference signal (CSI-RS) RSRP.

[0103] V4. The information related to initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration also includes at least one of the following:

[0104] The synchronization signal / PBCH block (SSB) index and the number of RACH preambles sent on each attempted SSB (in chronological order of attempts);

[0105] The frequency of the attempted SSB (new radio (NR) absolute radio frequency channel number);

[0106] Beam quality of each attempted SSB (i.e., beam-level measurements during RACH attempts, such as beam reference signal received power (BRSRP), beam reference signal received quality (BRSRQ), beam signal-to-interference-plus-noise ratio (BSINR));

[0107] The elapsed time between the last measurement and the beam selection time.

[0108] It should be noted that the above-mentioned relevant information for initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration may be presented in the form of a list.

[0109] V5. The target cell information includes at least one of the following:

[0110] Physical cell identification;

[0111] New air interface cell global identification;

[0112] Tracking area code;

[0113] frequency.

[0114] V6. The SBFD random access configuration information of the target cell includes but is not limited to at least one of the following:

[0115] 1. The location of random access resources;

[0116] 2. Random access preamble configuration;

[0117] 3. Random access UE feature combination information, such as reduced capability (Redcap), small data, slice information, msg3-Repetitions, slice information, SFBD and other different UE features;

[0118] 4. Random access channel (RACH) backoff parameter value;

[0119] 5.RACH transmission power control parameters;

[0120] 6. RACH partition information;

[0121] 7. The type of the RACH configuration includes at least one of the following: a traditional RACH configuration for non-SBFD UEs, a shared RACH configuration for SBFD UEs and non-SBFD UEs, and an independent RACH configuration for SBFD UEs (also referred to as a dedicated RACH configuration for SBFD UEs). Each RACH configuration can be further divided into a contention-based RACH configuration and a non-contention-based RACH configuration. Each RACH configuration can be further divided into a 2-step random access and a 4-step random access;

[0122] 8. Partial bandwidth configuration information for initiating random access.

[0123] V7: Information used for cell selection and reselection in SBFD random access configuration or SBFD partial bandwidth configuration, including but not limited to the reference signal threshold information of the cell, such as Q qualmin , Q qualminoffset wait.

[0124] The following is an introduction to the different types of BWP mentioned above.

[0125] The BWP configuration dedicated to the SBFD resource configuration means that the base station configures a set of BWP configurations dedicated to the SBFD UE for the SBFD UE. The SBFD UE can initiate an initial random access with the BWP configuration.

[0126] The legacy BWP configuration includes at least one of the following: random access configuration corresponding to the BWP, PUSCH configuration or PDSCH configuration, PUCCH or PDCCH configuration;

[0127] The shared BWP configuration means that the BWP configuration can be used for SBFD UEs and can also be used for BWP configurations of non-SBFD common UEs.

[0128] For SBFD UE, the network may configure a shared BWP configuration or a dedicated SBFD BWP configuration for the SBFD UE. In addition, the network may also configure the BWP priority of the SBFD UE, included in the BWP configuration, indicating which type of BWP configuration is preferred (e.g., a dedicated SBFD BWP configuration, a shared BWP configuration, or a legacy BWP configuration).

[0129] For SBFD UE, according to the configuration decision, the SBFD BWP configuration is used, and the SBFD UE initiates random access (message 1) on the random access resources corresponding to the SBFD BWP configuration. The network can indicate in the subsequent random access response (message 2) whether the SBFD UE switches the BWP type, for example, from the SBFD BWP configuration to the shared BWP configuration or the traditional BWP configuration. The SBFD UE can switch to the corresponding BWP configuration according to the instruction to complete the random access (send message 3 or receive message 4) or initiate a new random access.

[0130] If random access on the SBFD BWP configuration fails (for example, the number of random access preamble transmissions reaches the maximum value), the SBFD UE can switch to the shared BWP configuration or the traditional BWP configuration to re-initiate random access.

[0131] The following introduces the above different types of random access configurations.

[0132] The different types of random access configurations include non-SBFD RACH configurations and at least one set of SBFD RACH configurations.

[0133] Among them, at least one set of 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 some or all configuration parameters of the non-SBFD RACH configuration; the configuration parameters in the second SBFD RACH configuration and the configuration parameters of the non-SBFD RACH configuration are configured independently of each other.

[0134] In order to more clearly illustrate the solution provided by the present disclosure, the concepts of non-SBFD RACH configuration, first SBFD RACH configuration and second SBFD RACH configuration are first introduced below.

[0135] (1) Non-SBFD RACH configuration.

[0136] The non-SBFD RACH configuration may also be referred to as a traditional RACH configuration or a traditional RACH configuration, which will not be described in detail below.

[0137] The non-SBFD RACH configuration includes at least one of the following:

[0138] Traditional 4-step random access channel 4-step RACH configuration, such as RACH-ConfigCommon, the traditional 4-step RACH configuration may also be referred to as 4-step non-SBFD RACH;

[0139] Traditional 2-step random access channel 2-step RACH configuration, such as MsgA-ConfigCommon-r16, traditional 2-step RACH configuration can also be called 2-step non-SBFD RACH;

[0140] A traditional contention-based random access channel (CBRA RACH) configuration, which is also called a contention-based random access configuration, such as RACH-ConfigCommon or MsgA-ConfigCommon-r16 configured in an uplink common bandwidth part (BWP-UplinkCommon); a traditional CBRA RACH configuration may also be called a CBRA non-SBFD RACH.

[0141] Traditional non-contention-free random access channel (CFRA RACH) configuration, such as RACH-ConfigDedicated or CFRA or CFRA-TwoStep-r16 configured in ReconfigurationWithSync, or RACH-ConfigBFR configured in BeamFailureRecoveryConfig, etc., the traditional CFRA RACH configuration can also be called CFRA non-SBFD RACH configuration.

[0142] (2) First SBFD RACH configuration.

[0143] The first SBFD RACH configuration may also be referred to as a shared SBFD RACH configuration. The first node may provide the second node with one or more first SBFD RACH configurations based on non-SBFD RACH configurations, each of which specifies that the second node supporting SBFD may initiate random access according to the RACH parameters specified in the configuration.

[0144] For example, the first SBFD RACH configuration includes a first 4-step SBFD RACH configuration; the first 4-step SBFD RACH configuration may also be referred to as a shared 4-step SBFD RACH configuration, and may be configured based on or corresponding to a traditional 4-step RACH configuration.

[0145] For another example, the first SBFD RACH configuration includes a first 2-step SBFD RACH configuration; the first 2-step SBFD RACH configuration may also be referred to as a shared 2-step SBFD RACH configuration, and may be configured based on or corresponding to a traditional 2-step RACH configuration; wherein the traditional 2-step RACH configuration may be independent of a traditional 4-step RACH configuration, or share a traditional 4-step RACH configuration.

[0146] For another example, the first SBFD RACH configuration includes a first CBRA SBFD RACH configuration. The first CBRA SBFD RACH configuration may also be referred to as a shared CBRA SBFD RACH configuration, and may be based on or correspond to a traditional CBRA RACH configuration.

[0147] For another example, the first SBFD RACH configuration includes a first CFRA SBFD RACH configuration. The first CFRA SBFD RACH configuration may also be referred to as a shared CFRA SBFD RACH configuration, and may be based on or correspond to a traditional CFRA RACH configuration.

[0148] 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 may also be understood as RACH sub-configurations included in the first SBFD RACH configuration.

[0149] The first SBFD RACH configuration shares some or all configuration parameters of the non-SBFD RACH configuration. Exemplarily, the random access channel occasion (RO) and synchronization signal block (SSB) mapping rules provided by the non-SBFD RACH configuration are also applicable to the corresponding first SBFD RACH configuration.

[0150] As an example, the non-SBFD RACH configuration provides a set of time-frequency resources of the configured RO, 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 valid RO with a part of the time domain code domain resources completely non-overlapping, and also obtain a valid RO with a part or all of the time domain code domain resources overlapping; or, the RO validation rule used by the second node supporting SBFD makes the RO of the second node supporting SBFD and the RO of the second node not supporting SBFD completely non-overlapping. Here, the second node supporting SBFD can also be understood as a second node supporting random access on SBFDRACH resources, and the second node not supporting SBFD can also be understood as a second node not supporting random access on SBFDRACH resources; for the convenience of description, the second node supporting SBFD is referred to as a sub-band full-duplex terminal SBFD UE, and the second node not supporting SBFD is referred to as a non-sub-band full-duplex terminal non-SBFD UE.

[0151] As another example, the first node may configure the RO of the first SBFD RACH configuration to be a subset or a full set of the RO of the non-SBFD RACH configuration. In addition, the first node may also configure the sub-band full-duplex random access channel opportunity mask SBFD ROmask to indicate that only part of the RO index indicated by the SBFD RO mask is allowed to be shared with the SBFD UE for use. For example, the RACH configuration includes the SBFD RO mask, and the SBFD RO mask is used to indicate the part of the RO index allowed to be used by the SBFD UE in the non-SBFD RACH configuration; or, the first node sends the SBFD RO mask through control signaling, and the SBFD RO mask is used to indicate the part of the RO index allowed to be used by the SBFD UE in the non-SBFD RACH configuration. In a specific example, the first node may explicitly indicate that all ROs of the non-SBFD RACH configuration can be shared with the SBFD UE for use; or, the first node may also implicitly indicate that all ROs of the non-SBFD RACH configuration can be shared with the SBFD UE for use, for example, the first node may implicitly indicate by not configuring the SBFD RO mask parameter. Based on the example described in the embodiment of the present disclosure, in this case, the SBFD UE can only obtain the RO that overlaps with the non-SBFD UE in the time and frequency domain. It should be understood that in some cases, the first node can also indicate through the SBFD RO mask that the SBFD UE is not allowed to share the RO in the non-SBFD RACH configuration.

[0152] As another example, the SBFD UE uses the RO validity rule to obtain the RO that partially overlaps with the non-SBFD UE. Further, on the partially overlapping RO, the subband full-duplex random access channel opportunity mask SBFD RO mask configured by the first node determines which ROs in the overlapping RO can be shared with the SBFD UE.

[0153] (3) Second SBFD RACH configuration.

[0154] The second SBFD RACH configuration may 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 independently configured from the configuration parameters of the non-SBFD RACH configuration. The first node may provide the second node with one or more sets of second SBFD RACH configurations that are independent of the non-SBFD RACH configuration, and each set of the configurations specifies that the second node supporting SBFD may initiate random access according to the RACH parameters specified in the configurations.

[0155] For example, according to the type of random access initiated, the second SBFD RACH configuration includes: a second 4-step SBFD RACH configuration, and / or, a second 2-step SBFD RACH configuration; wherein the second 4-step SBFD RACH configuration may 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 may also be referred to as an independent 2-step SBFD RACH configuration, which is configured independently of the traditional 2-step RACH configuration.

[0156] For another example, the second SBFD RACH configuration may also include: a second CBRA SBFD RACH configuration and / or a second CFRA SBFD RACH configuration; wherein the second CBRA SBFD RACH configuration may 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 may also be referred to as an independent CFRA SBFD RACH configuration, which is configured independently of the traditional CBRA RACH configuration.

[0157] 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 may also be understood as RACH sub-configurations included in the second SBFD RACH configuration.

[0158] The second SBFD RACH configuration includes at least a resource indication of the RO time-frequency code domain independent of the non-CBRA RACH configuration (i.e., the traditional RACH configuration), and / or an indication of the SSB-RO mapping relationship independent of the non-CBRA RACH configuration. For example, the second SBFD RACH configuration may include a preamble format different from that of the non-CBRA RACH configuration, and / or a different physical random access channel (PRACH) configuration period, etc.

[0159] The level of the second SBFD RACH configuration may be consistent with that of the non-CBRA RACH configuration to which it is relative, that is, the non-CBRA RACH configuration to which it is relative has the same parent node; or, the level of the second SBFD RACH configuration may be configured inside the non-CBRA RACH configuration to which it is relative, that is, configured at a lower level than the non-CBRA RACH configuration to which it is relative; or, the second SBFD RACH configuration may maintain the same level as the parent node of the non-CBRA RACH configuration to which it is relative. In a specific example, in a scenario where there is no expandable signaling space in the parent node of the non-CBRA RACH configuration to which the second SBFD RACH configuration is relative, the second SBFD RACH configuration may be configured to maintain the same level as the parent node of the non-CBRA RACH configuration to which it is relative.

[0160] The second SBFD RACH configuration may also include a feature combination preamble list (featureCombinationPreamblesList), indicating that the second SBFD RACH configuration also supports dividing different preamble index intervals corresponding to different features (features), that is, supports random access channel partition (RACH partition).

[0161] In some embodiments, the first node provides the first SBFD RACH configuration and the second SBFD RACH configuration at the same time; or, the first node provides only one of the first SBFD RACH configuration or the second SBFD RACH configuration at the same time. The first SBFD RACH configuration and / or the second SBFD RACH configuration may be provided via downlink RRC signaling or downlink broadcast signaling.

[0162] In some embodiments, under contention-based random access CFRA, the first node may add an indication to the non-SBFD RACH configurations dedicated to different functions / scenarios. The added indication is used to determine whether the SBFD UE can use these non-SBFD RACH configurations when initiating CFRA for the same function / scenario.

[0163] In some embodiments, the second node supports SBFD.

[0164] In some embodiments, the second node does not support SBFD.

[0165] In some implementations, the second node is only allowed to perform uplink (UL) transmission on a normal uplink (NUL) or a supplementary uplink (SUL) but not on both at the same time during a period of time.

[0166] In some embodiments, when the first node provides the SBFD RACH configuration, the second node only obtains the SBFD RACH configuration configured on the NUL carrier, that is, the second node will not receive the SBFD RACH configuration configured in the SUL carrier.

[0167] Exemplarily, the second node obtains multiple sets of random access channel RACH configurations on the NUL carrier, where the multiple sets of RACH configurations include non-subband full-duplex random access channel SBFD RACH configurations and at least one set of SBFD RACH configurations.

[0168] In some embodiments, a supplementary uplink (SUL) carrier may 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 may be configured independently of the TDD mode.

[0169] In some embodiments, the selection and switching between different types of SBFD RACH configurations and non-SBFDRACH (ie, traditional RACH configurations) mentioned in the embodiments of the present disclosure occur on the NUL, that is, they occur after the NUL / SUL carrier selection, and the UE selects the NUL carrier.

[0170] The following describes selection or switching under multiple different types of random access configurations, which may include the following examples.

[0171] Example 1: The multiple RACH configurations include a non-SBFD RACH configuration and a first SBFD RACH configuration, and the random access of the second node fails.

[0172] Based on the above brief description of the first SBFD RACH configuration, it can be known that the first SBFD RACH configuration may include some ROs that cannot be used by second nodes that do not support SBFD (such as non-SBFD UEs). For example, the RO configured in the downlink DL time is not applicable to non-SBFD UEs.

[0173] If the second node fails to try Msg1 / MsgA on these ROs, it can switch to non-SBFD RACH configuration, that is, continue to try on traditional RACH resources to increase the reliability and robustness of Msg1 / MsgA uplink transmission.

[0174] In some embodiments, in the event that random access based on the first set of RACH configurations fails, the second node performs random access based on the second set of RACH configurations.

[0175] In some embodiments, each of the multiple RACH configurations includes at least one RACH sub-configuration, and in the event that random access based on the first RACH sub-configuration fails, the second node performs random access based on the second RACH sub-configuration.

[0176] In some embodiments, the second node selects the first SBFD RACH configuration, and if the number of failed transmissions initiated based on the first SBFD RACH configuration for Msg1 / MsgA reaches a first preset threshold, the second node may declare random access failure and terminate the random access process.

[0177] In other embodiments, the second node selects the first SBFD RACH configuration, and after the number of failed Msg1 / MsgA transmission initiated based on the first SBFD RACH configuration reaches a first preset number threshold, switches or falls back to the resources specified by the non-SBFD RACH configuration to continue initiating Msg1 / MsgA transmission.

[0178] The first preset number threshold is configured or defaulted by the first node, for example, it may be a fixed value specified by the protocol.

[0179] The above failure to initiate transmission of Msg1 / MsgA means that the second node initiates transmission of Msg1 / MsgA but fails to receive corresponding Msg2 / MsgB within a specified time window.

[0180] In some embodiments, the first set of RACH sub-configurations is a first 4-step SBFD RACH sub-configuration, and the second set of RACH configurations is a 4-step non-SBFD RACH sub-configuration.

[0181] For example, Figure 3As shown, if the number of times that the second node fails to initiate 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 resources specified by the 4-step non-SBFD RACH sub-configuration to continue to initiate Msg1 transmission. 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.

[0182] In some embodiments, the first set of RACH sub-configurations are first 2-step SBFD RACH sub-configurations and the second set of RACH configurations are 2-step non-SBFD RACH sub-configurations.

[0183] For example, Figure 3 As shown, if the number of times that the second node fails to initiate 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 resources specified by the 2-step non-SBFD RACH sub-configuration to continue to initiate MsgA transmission. 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.

[0184] Further, the first node may configure the first preset number threshold to be smaller than a retransmission threshold for switching from the 2-step RACH configuration or falling back to the 4-step RACH configuration.

[0185] In some embodiments, the first set of RACH sub-configurations is a first 2-step SBFD RACH sub-configuration; and the second set of RACH sub-configurations is a 4-step non-SBFD RACH sub-configuration or a first 4-step SBFD RACH sub-configuration.

[0186] Furthermore, the second node may also select a set of subconfigurations from the 4-step non-SBFD RACH subconfiguration or the first 4-step SBFD RACH subconfiguration as the second set of RACH subconfigurations according to the priorities of the RACH subconfigurations configured by the first node.

[0187] For example, Figure 3As shown, if the number of times the second node fails to initiate 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 4-step non-SBFD RACH sub-configuration or the resources specified by the first 4-step SBFD RACH sub-configuration to continue initiating Msg1 transmission.

[0188] In an example, the second node switches or falls back to the resources specified by the 4-step non-SBFD RACH sub-configuration to continue to initiate Msg1 transmission.

[0189] 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.

[0190] In another example, the second node may also select a set of subconfigurations from the 4-step non-SBFD RACH subconfiguration or the first 4-step SBFD RACH subconfiguration as the second set of RACH subconfigurations according to the priorities of the various RACH subconfigurations configured by the first node, and continue to initiate Msg1 transmission on the resources specified by the second RACH subconfiguration. It may be specified that the priority of the 4-step non-SBFD RACH subconfiguration is lower than the priority of the first 4-step SBFD RACH subconfiguration, or that the priority of the 4-step non-SBFD RACH subconfiguration is higher than the priority of the first 4-step SBFD RACH subconfiguration; or, the second node may decide to fall back or switch to the 4-step non-SBFD RACH subconfiguration or the first 4-step SBFD RACH subconfiguration.

[0191] In some embodiments, if the second preset number threshold is configured, the second node ignores the traditional transmission number threshold for falling back from 2-step RACH configuration to 4-step RACH configuration.

[0192] In some embodiments, the second preset number threshold and the first preset number threshold configuration cannot be configured to the second node at the same time, or applied by the second node at the same time.

[0193] In some embodiments, the above-mentioned fallback or switching RACH configuration method can be performed for the CBRA or CFRA scenario respectively.

[0194] In some embodiments, the above-mentioned method of falling back or switching RACH configuration can only be used once before the second node declares random access failure.

[0195] In some embodiments, if the first node enables non-SBFD RACH configuration and configures SBFD as a feature, it can only fall back on the RACH resource set corresponding to the feature combination where the SBFD feature is located. It should be noted that the above fallback can also be understood as switching or reselection, which will not be repeated below.

[0196] Exemplarily, in the case where 2-step RACH configuration and 4-step RACH configuration are configured on the resource set, fallback from 2-step RACH configuration to 4-step RACH configuration within the resource set is supported.

[0197] In addition, for each of the above-mentioned switching / fallback scenarios or for the overall switching / fallback function, the first node may indicate whether such switching / fallback is allowed. Exemplarily, the first node may use RRC signaling, MAC CE or DCI to make such an indication.

[0198] Alternatively, for each of the above switching / fallback scenarios or for the overall switching / fallback function, whether the second node can perform such switching / fallback is specified through a protocol.

[0199] Example 2: The multiple RACH configurations include a non-SBFD RACH configuration and a second SBFD RACH configuration, and random access of the second node fails.

[0200] The second SBFD RACH configuration at least includes a resource indication of the RO time-frequency code domain independent of the non-SBFD RACH configuration, and / or an indication of an independent SSB-RO mapping relationship. For example, the second SBFD RACH configuration may include a preamble format different from the non-SBFD RACH configuration.

[0201] If switching or falling back 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 amounts, etc.

[0202] When the second node is provided with the second SBFD RACH configuration, the second node may select the second SBFD RACH configuration, or use a non-SBFD RACH configuration, wherein the second SBFD RACH configuration may include a second 4-step SBFD RACH configuration and / or a second 2-step SBFD RACH configuration.

[0203] The selection and fallback of the second node between the second 4-step SBFD RACH configuration and the non-SBFD 4-step RACH configuration are similar to the selection and fallback of the second node between the first 4-step SBFD RACH configuration and the 4-step non-SBFD RACH configuration in the fourth embodiment.

[0204] The selection and fallback of the second node between the second 2-step SBFD RACH configuration and the 2-step non-SBFD RACH configuration are similar to the selection and fallback of the second node between the first 2-step SBFD RACH configuration and the 2-step non-SBFD RACH configuration described in the fourth embodiment.

[0205] The selection of the second node between the second 4-step SBFD RACH configuration and the 2-step non-SBFD RACH configuration is similar to the selection of the second node between the first 4-step SBFD RACH configuration and the 2-step non-SBFD RACH configuration described in the fourth embodiment.

[0206] In some embodiments, whether the second node falls back from the second 2-step SBFD RACH configuration to the second 4-stepSBFD RACH configuration or to the 4-step non-SBFD RACH configuration may depend on the second node configuration or default, for example, the priority of the second 4-step SBFD RACH configuration and the 4-step non-SBFD RACH configuration is predefined by a protocol; or, the second node selects one of the configurations by itself. The UE's self-selection behavior may be specified by the protocol, or notified or allowed by the first node through signaling.

[0207] The second SBFD RACH configuration may provide completely different RACH parameters from the non-SBFD RACH configuration, such as RO period, preamble format, etc. If the second node fails to perform random access continuously on the second SBFD RACH configuration, the UE may fall back to the non-SBFD RACH configuration and continue to try with different RACH parameters to improve the accuracy and robustness of random access.

[0208] In some embodiments, the method further comprises: in case random access based on the first set of RACH configurations fails, performing random access based on a second set of RACH configurations.

[0209] In some embodiments, each of the multiple RACH configurations includes at least one RACH sub-configuration, and in the event that random access based on the first RACH sub-configuration fails, the second node performs random access based on the second RACH sub-configuration.

[0210] In some embodiments, the second node selects the second SBFD RACH configuration, and if the number of failed Msg1 / MsgA transmissions initiated based on the second SBFD RACH configuration reaches a third preset number threshold, the second node may declare random access failure and terminate the random access process.

[0211] In other embodiments, the second node selects the second SBFD RACH configuration, and after the number of failed Msg1 / MsgA transmission initiated based on the second SBFD RACH configuration reaches a third preset number threshold, switches or falls back to the resources specified by the non-SBFD RACH configuration to continue initiating Msg1 / MsgA transmission.

[0212] The second preset number threshold is configured or defaulted by the first node, for example, it may be a fixed value specified by the protocol.

[0213] 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;

[0214] For example, Figure 4 As shown, if the number of times that the second node fails to initiate Msg1 transmission based on the second 4-step SBFD RACH sub-configuration reaches a third preset number threshold, the second node switches or falls back to the resources specified by the 4-step non-SBFD RACH sub-configuration to continue to initiate Msg1 transmission. 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.

[0215] In some embodiments, the first set of RACH sub-configurations are second 2-step SBFD RACH sub-configurations, and the second set of RACH configurations are 2-step non-SBFD RACH sub-configurations.

[0216] For example, Figure 4 As shown, if the number of times that the second node fails to initiate MsgA transmission based on the second 2-step SBFD RACH sub-configuration reaches a third preset number threshold, the second node switches or falls back to the resources specified by the 2-step non-SBFD RACH sub-configuration to continue to initiate MsgA transmission. The 2-step non-SBFD RACH sub-configuration includes at least one of the following: CBRA 2-step non-SBFD RACH sub-configuration and CFRA 2-step non-SBFD RACH sub-configuration.

[0217] Further, the first node may configure the third preset number threshold to be smaller than the retransmission threshold for switching from the 2-step RACH configuration or falling back to the 4-step RACH configuration.

[0218] 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 sub-configurations is a 4-step non-SBFD RACH sub-configuration or a second 4-step SBFD RACH sub-configuration.

[0219] Further, the second node may also select a set of subconfigurations from the 4-step non-SBFD RACH subconfiguration or the second 4-step SBFD RACH subconfiguration as the second set of RACH subconfigurations according to the priorities of the RACH subconfigurations configured by the first node.

[0220] For example, Figure 4 As shown, if the number of times the second node fails to initiate 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 4-step non-SBFD RACH sub-configuration or the resources specified by the 4-step SBFD RACH sub-configuration to continue initiating Msg1 transmission.

[0221] In an example, the second node switches or falls back to the resources specified by the 4-step non-SBFD RACH sub-configuration to continue to initiate Msg1 transmission.

[0222] In another example, the second node switches or falls back to the resources specified by the second 4-step SBFD RACH sub-configuration to continue initiating MsgA transmission.

[0223] In another example, the second node may also select a set of subconfigurations from the 4-step non-SBFD RACH subconfiguration or the second 4-step SBFD RACH subconfiguration as the second set of RACH subconfiguration according to the priorities of the various RACH subconfigurations configured by the first node, and continue to initiate Msg1 transmission on the resources specified by the second RACH subconfiguration. It may be specified that the priority of the 4-step non-SBFD RACH subconfiguration is lower than the priority of the second 4-step SBFD RACH subconfiguration, or the priority of the 4-step non-SBFD RACH subconfiguration is higher than the priority of the second 4-step SBFD RACH subconfiguration; or the second node may decide to fall back or switch to the 4-step non-SBFD RACH subconfiguration or the second 4-step SBFD RACH subconfiguration.

[0224] In some embodiments, if the fourth predetermined number threshold is configured, the second node ignores the conventional transmission number threshold for falling back from 2-step RACH configuration to 4-step RACH configuration.

[0225] In some embodiments, the fourth preset number threshold and the third preset number threshold configuration cannot be configured to the second node at the same time, or applied by the second node at the same time.

[0226] In some embodiments, the above-mentioned fallback or switching RACH configuration method can be performed for the CBRA or CFRA scenario respectively.

[0227] In some embodiments, for each of the above switching / fallback scenarios or for the overall switching / fallback function, the first node may indicate whether such switching / fallback is allowed. Exemplarily, the first node may use RRC signaling, MACCE or DCI to make such an indication.

[0228] Alternatively, for each of the above switching / fallback scenarios or for the overall switching / fallback function, whether the second node can perform such switching / fallback is specified through a protocol.

[0229] Example 3: The SBFD RACH configuration includes the first SBFD RACH configuration and the second SBFD RACH configuration, and random access of the second node fails.

[0230] In some embodiments, the first node may configure the first SBFD RACH configuration and the second SBFD RACH configuration at the same time, but the second node can only choose to send Msg1 / MsgA on the RACH resources specified by one of the configurations.

[0231] In some embodiments, after a certain configuration is selected, when certain situations occur, the second node may be allowed to switch to another configuration to continue sending Msg1 / MsgA.

[0232] In some embodiments, the second node may switch between the first SBFD RACH configuration and the second SBFD RACH configuration.

[0233] In some embodiments, the first node configures a switching threshold N1, and the N1 can be understood as the repeated transmission failure threshold N1 for the second node to switch from the first set of RACH configurations to the second set of RACH configurations. Exemplarily, the second node selects one of the first SBFD RACH configuration and the second SBFD RACH configuration to initiate Msg1 / MsgA and fails N1 times, and the second node can switch to another set of configurations to continue trying.

[0234] In some embodiments, the second node initially selects the second SBFD RACH configuration to initiate Msg1 / MsgA, but fails to send Msg1 / MsgA (i.e., does not receive a response to Msg2 / MsgB) for more than N1 times, and the second node can switch to the first SBFD RACH configuration for continued attempts. Additionally, such switching is only allowed once before declaring the random access failure.

[0235] In some embodiments, the switching is limited to a 4-step random access mode or a 2-step random access mode. In other words, the switching does not cross a 4-step random access mode or a 2-step random access mode. For example, the switching may be performed from a first 4-step SBFD RACH configuration to a second 4-step SBFD RACH configuration; or, for another example, the switching may be performed from a first 2-step SBFD RACH configuration to a second 2-step SBFD RACH configuration.

[0236] In some embodiments, in the event that random access based on the first set of RACH configurations fails, the second node performs random access based on the second set of RACH configurations.

[0237] In some embodiments, each of the multiple RACH configurations includes at least one RACH sub-configuration, and in the event that random access based on the first RACH sub-configuration fails, the second node performs random access based on the second RACH sub-configuration.

[0238] In some embodiments, when random access fails in the first SBFD RACH configuration, the second node may switch to the second SBFD RACH configuration or the non-SBFD RACH configuration and retry random access.

[0239] In some embodiments, in a 4-step random access mode or a 2-step random access mode, the base station may configure priorities for two situations: falling back from the first SBFD RACH configuration to the non-SBFD RACH configuration or switching to the second SBFD RACH configuration.

[0240] In some embodiments, the priority of the non-SBFD RACH configuration and the second SBFD RACH configuration is configured by the first node or is a default.

[0241] In some embodiments, the priority of the non-SBFD RACH configuration and the second SBFD RACH configuration is implicitly indicated by the first node.

[0242] In some embodiments, the priority of the non-SBFD RACH configuration and the second SBFD RACH configuration is implicitly indicated by the first node.

[0243] Exemplarily, the priorities of the exemplary non-SBFD RACH configuration and the second SBFD RACH configuration are implicitly determined based on the number-of-retransmission failure threshold N for the second node to fallback from the SBFD RACH configuration to the non-SBFD RACH configuration, and the number-of-retransmission failure threshold N1 for the second node to switch from the first set of RACH configurations to the second set of RACH configurations. 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 priorities by the magnitudes of the configured number-of-retransmission failure thresholds.

[0244] In some embodiments, the first set of RACH configurations is the first SBFD RACH configuration, and among the multiple sets of RACH configurations, in addition to the first set of RACH configurations, there are the second SBFD RACH configuration and the non-SBFD RACH configuration; wherein, when N is greater than N1, the priority of the second SBFD RACH configuration is higher than that of the non-SBFD RACH configuration; when N is less than N1, the priority of the second SBFD RACH configuration is lower than that of the non-SBFD RACH configuration; when N is equal to N1, the priorities of the second SBFD RACH configuration and the non-SBFD RACH configuration are determined by the second node itself.

[0245] Exemplarily, as Figure 5 shown, taking the number-of-retransmission failure threshold N for falling back from the first SBFD RACH configuration to the non-SBFD RACH configuration as N2 as an example, then:

[0246] The first node can configure N1 < N2, that is, after the second node attempts N1 times, it switches from the first SBFD RACH configuration to the second SBFD RACH configuration. Additionally, when the second node continues to attempt up to N3 times and still fails, the second node then switches from the second SBFD RACH configuration to the non-SBFD RACH configuration; where N3 is the number-of-retransmission failure threshold for falling back from the second SBFD RACH configuration to the non-SBFD RACH configuration; or,

[0247] The first node configures N1 > N2, that is, after the second node attempts N2 times, it switches from the first SBFD RACH configuration to the non-SBFD RACH configuration; or,

[0248] 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 traditional RACH configuration depends on the decision of the second node itself.

[0249] In some embodiments, in a 4-step random access mode or a 2-step random access mode, the base station may configure priorities for two situations: falling back from the second SBFD RACH configuration to the non-SBFD RACH configuration or switching to the first SBFD RACH configuration.

[0250] In some embodiments, the priority of the non-SBFD RACH configuration and the first SBFD RACH configuration is first node configured or default.

[0251] In some embodiments, the priority of the non-SBFD RACH configuration and the first SBFD RACH configuration is implicitly indicated by the first node.

[0252] In some embodiments, the priority of the non-SBFD RACH configuration and the first SBFD RACH configuration is implicitly indicated by the first node.

[0253] Exemplarily, the priority of the non-SBFD RACH configuration and the first SBFD RACH configuration is implicitly determined based on the repeated transmission failure number threshold N for the second node to fall back from the SBFD RACH configuration to the non-SBFD RACH configuration, and the repeated transmission failure number threshold N1 for the second node to switch from the first set of RACH configuration to the second set of RACH configuration, where 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 repeated transmission failure number threshold.

[0254] 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 except the first set of RACH configurations; wherein, when N is greater than N1, the priority of the first SBFD RACH configuration is higher than the priority of the non-SBFD RACH configuration; when N is less than N1, the priority of the first SBFD RACH configuration is lower than the priority of the non-SBFD RACH configuration; when 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 itself.

[0255] For example, Figure 5 As shown, taking the repeated transmission failure threshold N for the second SBFD RACH configuration to fall back to the non-SBFD RACH configuration as N3 as an example, then:

[0256] The first node can configure N1 < N3, that is, after the second node attempts N1 times, it switches from the second SBFD RACH configuration to the first SBFD RACH configuration. Additionally, when the second node continues to attempt up to N2 times and still fails, the second node switches from the first SBFD RACH configuration to the non-SBFD RACH configuration, where N2 is the threshold of the number of repeated transmission failures for the first SBFD RACH configuration to fallback to the non-SBFD RACH configuration; or,

[0257] The first node configures N1 > N3, that is, after the second node attempts N3 times, it switches from the second SBFD RACH configuration to the non-SBFD RACH configuration; or,

[0258] The first node configures N1 = N3. Whether the second node switches from the second SBFD RACH configuration to the first SBFD RACH configuration or the traditional RACH configuration depends on the decision of the second node itself.

[0259] Thus, the switching priority configuration associated with each configuration is achieved by the threshold size of the number of repeated transmission failures associated with each configuration at the first node.

[0260] In some embodiments, the SBFD information includes the fallback information of the second node, and the fallback information is used to indicate how to fallback from the SBFD resource RA to other RA methods.

[0261] In some embodiments, the fallback information is included in perRAAtempInfo.

[0262] The above introduction to fallback and switching has been made. 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, it adjusts the resource configuration based on the SBFD information to perform network self-optimization.

[0263] Based on Figure 2 In the shown embodiment, after the first node receives the SBFD information sent by the second node, it 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 the network quality, and the first node performs network self-optimization based on the SBFD information. Compared with the network self-optimization based on the set network optimization strategy in the related art, it can perform network self-optimization in a targeted manner, thereby improving the network self-optimization effect.

[0264] In wireless communication systems, time domain resources are allocated between downlink and uplink in time division duplex (TDD). Allocating a limited time length for the uplink in TDD results in reduced coverage, increased latency, and reduced capacity. As a possible enhancement to this limitation of traditional TDD operation, it is worth studying the feasibility of allowing downlink and uplink to exist simultaneously (also known as full-duplex), or more specifically, SBFD or in-band full-duplex (IBFD) on the gNB side within the traditional TDD frequency band. Then, for some symbols configured as semi-static downlink resources or flexible resources, a portion of the frequency resources can be configured as UL resources, such as UL subbands / UL available PRBs. Downlink or flexible symbols configured with UL subbands can be called full-duplex symbols. Alternatively, for some symbols configured as semi-static uplink resources or flexible resources, a portion of the frequency resources can be configured as DL resources, such as DL subbands / DL available PRBs. Uplink or flexible symbols configured with DL subbands can also be called full-duplex symbols. In either case, uplink and downlink will appear on different frequency domain resources of the same time domain resource, such as Figure 6 As shown, the frame structure is configured as DDDFU, and some frequency domain resources (such as slots 1 to 3) in part of the downlink resources and / or flexible resources are configured as uplink subbands (UL subbands).

[0265] For UEs with full-duplex capability, i.e., UEs with full-duplex capability (SBFD UEs), the UL subband / UL available PRB in the full-duplex symbol can be used for uplink transmission, while for UEs without full-duplex capability, only conventional UL symbols or flexible symbols can be used for uplink transmission. The uplink transmission during the access process includes PRACH signals, msg3 PUSCH (including initial transmission and retransmission), and HARQ-ACK of msg4 PDSCH. In the full-duplex scenario, full-duplex symbols and conventional UL symbols or flexible symbols can expand the total uplink transmission time domain resources, thereby increasing the available random access resources or enhancing the coverage of random access signals.

[0266] In a cell using full-duplex technology, other cells with the same or different frequencies may interfere with the uplink and downlink transmission of this cell, such as Figure 7 As shown, symbol 3 of cell-1 is a DL symbol, and symbol 3 of cell-2 contains both downlink resources and uplink resources. Symbol 3 is an SBFD symbol. The unallocated resources in symbol 3 may include a protection subband (gap subband), but the unallocated resources are not necessarily all protection subbands. Symbols 4 and 5 are another way of allocating subbands, with the DL or UL subband in the middle and subbands for other transmission directions on both sides.

[0267] The downlink transmission of cell-1 on 3 may affect the uplink transmission of cell-2, which is called cross-link interference (CLI). Therefore, a certain mechanism is needed to eliminate CLI. The radio access network (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.

[0268] To accomplish CLI elimination, in some embodiments, Figure 8 As shown, the method may also include the following steps:

[0269] S201. Send configuration information to a third node.

[0270] Among them, the third node is a node adjacent to the first node. Figure 1 In the communication system shown, when the first node is the base station 21 , the third node may be the base station 22 .

[0271] In some embodiments, the configuration information is used to characterize the SBFD resource configuration of the first node.

[0272] In some embodiments, the configuration information is CLI-management information (MI).

[0273] In some embodiments, the SBFD resource configuration includes at least one of the following:

[0274] Random access configuration under SBFD resource configuration;

[0275] Bandwidth configuration under SBFD resource configuration.

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

[0277] Random access configuration under shared SBFD resource configuration;

[0278] Random access configuration under dedicated SBFD resource configuration.

[0279] The bandwidth configuration under SBFD resource configuration includes at least one of the following:

[0280] Bandwidth part (BWP) configuration under shared SBFD resource configuration;

[0281] Bandwidth configuration under dedicated SBFD resource configuration.

[0282] For the description of random access configuration under SBFD resource configuration, please refer to the above Figure 2 The description of multiple sets of SBFD RACH configurations in the illustrated embodiment will not be repeated here.

[0283] In some embodiments, the random access configuration includes at least one of the following: conventional random access resources, shared random access resources or random access resources dedicated to SBFD UEs. The BWP configuration includes: transmitted BWP configuration, shared BWP configuration or BWP configuration dedicated to SBFD UEs.

[0284] In some embodiments, the configuration information further includes at least one of the following:

[0285] Indication information used to indicate whether the random access function under the SBFD resource configuration is turned on. The indication information can be understood as the switch of the random access function, that is, whether the UE of this cell is allowed to use the SBFD RACH configuration or the SBFD BWP configuration for random access;

[0286] SBFD resource configuration and random access configuration for common carriers or supplementary uplink carriers.

[0287] Among them, the above-mentioned indication information for indicating whether the random access function under the SBFD resource configuration is turned on can be understood as the switch of the random access function, that is, whether the UE of this cell is allowed to use the SBFD RACH configuration or the SBFD BWP configuration for random access. It should be understood that in a cross-operator scenario, two adjacent base stations may belong to different operators, and the operator may choose to turn off the entire SBFD configuration of the cell to which it belongs. Therefore, the configuration information may include an activation indication or a deactivation indication.

[0288] based on Figure 8 In the illustrated embodiment, 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 mutual interference, thereby achieving CLI elimination.

[0289] In some embodiments, Fig. 9 As shown, an embodiment of the present disclosure provides a communication method, which is applied to a second node and may include the following steps:

[0290] S301. Send SBFD information to a first node.

[0291] In some embodiments, the SBFD information includes at least one of the following:

[0292] cell information of a target cell, the target cell including at least one of the following: a cell detected by the second node, a cell in which a radio link failure has occurred, a cell in which random access has been initiated, and a cell accessed by the second node;

[0293] SBFD resource configuration information of the target cell;

[0294] SBFD partial bandwidth configuration information of the target cell;

[0295] SBFD random access configuration information of the target cell;

[0296] Information related to initiating random access in SBFD random access configuration or SBFD partial bandwidth configuration;

[0297] Information for selecting between multiple different types of random access configurations or SBFD fractional bandwidth configurations;

[0298] Information used for cell selection and reselection in SBFD random access configuration or SBFD partial bandwidth configuration;

[0299] Indication information used to indicate whether cross-link interference is detected under the corresponding SBFD resource configuration or random access configuration;

[0300] A measured value of a cross-link interference reference signal detected under a corresponding SBFD resource configuration or random access configuration;

[0301] Under the corresponding SBFD resource configuration or random access configuration, the interfering resource position is detected.

[0302] The following is an exemplary description of each item of information in the SBFD information.

[0303] In some embodiments, the relevant information for initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration includes at least one of the following:

[0304] Number of random access initiations in SBFD random access configuration or SBFD partial bandwidth configuration;

[0305] Indication information used to indicate whether a conflict is detected when random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration;

[0306] Indication information used to indicate whether a fallback or switch occurs when random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration;

[0307] The type of random access used after fallback or switchover occurs when random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration;

[0308] The reason why a fallback or switch occurred when initiating random access in SBFD random access configuration or SBFD partial bandwidth configuration;

[0309] Indication information used to indicate whether random access is successfully initiated under SBFD random access configuration or SBFD partial bandwidth configuration;

[0310] Indication information used to indicate whether cross-link interference is detected when initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration;

[0311] The measured value of the cross-link interference reference signal is monitored by initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration.

[0312] In some embodiments, the target cell information includes at least one of the following:

[0313] Physical cell identification;

[0314] New air interface cell global identification;

[0315] frequency.

[0316] For the detailed description of each item in SBFD information, please refer to the above Figure 2 The corresponding description in the illustrated embodiment will not be repeated here.

[0317] The above embodiment illustrates a communication method provided by an embodiment of the present disclosure by taking how to improve the network self-optimization effect and how to complete CLI elimination as examples.

[0318] In some embodiments, the second node (such as UE) may report some data transmission status information to the network, and the data transmission status information may 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 the minimum count value associated with the discarded PDCP SDU, or the count value associated with the discarded PDCP SDU. The sequence number status information may be sent in the following situations: a data packet is discarded, or the discarded data packet has not been submitted to a lower layer such as a radio link control layer, or a cell handover occurs.

[0319] In some embodiments, Fig.10 FIG. 1 is a schematic diagram of an architecture of a next generation radio access network (NG-RAN) provided in an embodiment of the present disclosure, see Fig.10 , the NG-RAN architecture may deploy a NR home base station gateway (Femto GW) to allow the NG interface between the NR Femto node (i.e., home base station) and the fifth generation core network (5GC) to support a large number of NR Femto nodes in a scalable manner. The NR Femto GW acts as a concentrator of the control plane, especially the NG-C interface. Among them, Fig.10 The SeGW here stands for security gateway (SeGW).

[0320] The NG interface is defined as the following interface:

[0321] Interface between NR Femto GW and 5GC;

[0322] Interface between NR Femto Node and NR Femto GW;

[0323] The interface between the NR Femto node and the 5GC (although the directness of this interface may be achieved through the NR Femto GW, it is still essentially part of the NG interface).

[0324] From the perspective of the access and mobility management function (AMF), the NR Femto GW behaves like a gNB. To the NR Femto node, the NR Femto GW behaves like an AMF. Regardless of whether the NR Femto node is connected to the 5GC through the NR Femto GW, the NG interface between the NR Femto node and the 5GC is the same.

[0325] In short, NR Femto GW plays a bridge role in NG-RAN architecture. NR Femto GW enables a large number of NR Femto nodes to communicate with 5GC in a scalable and efficient way without each node directly interacting with the core network, thereby simplifying the network structure and reducing complexity. However, the signaling overhead of signaling interaction between NR Femto GW and NR Femto nodes is currently large. How to reduce the signaling overhead of signaling interaction between NR Femto GW and NR Femto nodes is an urgent problem to be solved.

[0326] Based on this, Fig.11 As shown, the embodiment of the present disclosure also provides a communication method, which is applied to a first node, and the first node may be a home base station. For example, the first node may be the above-mentioned Fig.10 For any NR Femto node shown in , the method may include the following steps:

[0327] S401: Receive multicast broadcast service information sent by a fourth node when a preset condition is met.

[0328] The fourth node is a gateway. For example, the first node may be the above Fig.10 NR Femto GW shown in.

[0329] The preset condition includes that the cell associated with the multicast broadcast service information is the cell associated with the first node. That is to say, when the fourth node forwards the multicast broadcast service information to the first node, it can first determine the target cell associated with the multicast broadcast service session to which the multicast broadcast service information belongs. If the target cell does not exist within the coverage of a first node, the fourth node does not forward the multicast broadcast service information to the first node. That is, when 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. When 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.

[0330] In this way, compared with the related technology, regardless of whether 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, thereby reducing the number of signaling interactions between the first node and the fourth node, thereby reducing the signaling overhead of signaling interactions between the first node and the fourth node, that is, reducing the signaling overhead of signaling interactions between the NR Femto GW and the NR Femto node.

[0331] It should be understood that the installation of the home base station is not planned and installed uniformly by the operator. Therefore, the core network side is unclear about the location of the home base station, or can only obtain a relatively broad location of the home base station. In some embodiments, in order to enable the core network side to know a relatively accurate location of the home base station, such as Fig.12 As shown, the method may also include the following steps:

[0332] S501. Send user location information to the fourth node.

[0333] The user location information (ULI) includes a virtual location of the first node.

[0334] The virtual position of the first node is obtained based on the following steps: the first node obtains the position of the connected second node, that is, obtains the position of the connected UE, and uses the position of the UE as the virtual position of the first node. Furthermore, in order to improve the accuracy of the virtual position of the first node, the first node obtains the positions of multiple connected second nodes, and then uses the average of the positions of multiple second nodes as the virtual position of the first node. Afterwards, 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 can know the location of the first node.

[0335] In some embodiments, the core network side may also learn the location of the first node through the following examples:

[0336] Example 1: The core network finds that a second node is connected to a first node, that is, the second node is connected to a home base station, then the core network can initiate location verification of the second node. For example, the location of the second node is verified by the location management function (LMF), and then the obtained location of the second node is used as the location of the Femto node, that is, as the location of the first node. In this way, the core network can obtain the location of the first node without interacting with the first node.

[0337] Example 2: After the core network performs operation administration and maintenance (OAM) on the first node connection, the core network identifies the geographic location of the first node by identifying the Internet Protocol (IP) address of the first node through OAM, or the first node reports its own geographic location to OAM, and then the core network learns the area where the first node is located, and thus obtains the corresponding location of the first node.

[0338] In some embodiments, Fig.10 In the network architecture shown in FIG. 1 , since NR Femto GW is introduced, it can be considered that NR Femto GW performs network element selection. However, how to implement NR Femto GW to perform network element selection is an urgent problem to be solved. Based on this, as shown in FIG. Fig.13 As shown, the method may also include the following steps:

[0339] S601. Send network element selection information to the fourth node.

[0340] The network element selection information is used by the fourth node to select a network element.

[0341] The network element selection information includes at least one of the following:

[0342] AMF Region ID and AMF Set ID derived from GUAMI;

[0343] Requested network slice selection information (Requested NSSAI);

[0344] Local operator policies;

[0345] 5G CIoT features indicated in RRC signalling by the UE;

[0346] Integrated access and backhaul indication (IAB-indicatio);

[0347] Narrowband IoT radio access technology type (NB-IoT RAT Type);

[0348] Category M Indication;

[0349] New Radio Simplified Equipment Indication (NR RedCap Indication);

[0350] NPN Onboarding indication as indicated in RRC signalling by the UE.

[0351] Correspondingly, after receiving the network element selection information, the fourth node can select a network element based on the network element selection information, for example, the fourth node selects an AMF network element.

[0352] In this way, the fourth node is enabled to select the network element, that is, the NR Femto GW is enabled to select the network element.

[0353] The above embodiment is described by taking the application of the communication method to the first node as an example. In some embodiments, the present disclosure further provides a communication method, which is applied to a fourth node and may include the following steps:

[0354] A1. When a preset condition is met, send multicast broadcast service information to the first node.

[0355] The preset condition includes that the cell associated with the multicast broadcast service information is the cell associated with the first node.

[0356] For a detailed description of the pre-conditions, please refer to the above Fig.11 The corresponding description in the illustrated embodiment will not be repeated here.

[0357] In some embodiments, the fourth node receives user location information sent by the first node, wherein the user location information includes a virtual location of the first node, and the fourth node may determine the location of the first node based on the virtual location of the first node included in the user location information.

[0358] In some embodiments, the fourth node receives the network element selection information sent by the first node, and the network element selection information is used by the fourth node to select a network element. After receiving the network element selection information, the fourth node can select a network element based on the network element selection information, for example, reselect an AMF network element. In this way, the fourth node is enabled to select a network element.

[0359] The network element selection information includes at least one of the following:

[0360] an access and mobility management function region identifier and an access and mobility management function set identifier derived from the globally unique access and mobility management function identifier;

[0361] Requested network slice selection information;

[0362] Local operator strategy;

[0363] 5G cellular IoT functions indicated by the user equipment in the radio resource control signaling;

[0364] Integrated access and return indication;

[0365] Types of NB-IoT wireless access technologies;

[0366] M-type instructions;

[0367] New air interface simplified equipment indication;

[0368] The specific network public network access indication indicated by the user equipment in the radio resource control signaling.

[0369] The above mainly introduces the solution provided by the embodiment of the present disclosure from the perspective of the method. In order to achieve the above functions, it includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present disclosure.

[0370] The embodiment of the present disclosure can divide the functional modules of the first node or the second node according to the above method embodiment. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one functional module. The above integrated module can be implemented in the form of hardware or software. It should be noted that the division of modules in the embodiment of the present disclosure is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function.

[0371] Fig.14 The following is a schematic diagram of the composition of a communication device provided in an embodiment of the present disclosure. Fig.14 As shown, the communication device 70 includes a receiving unit 701. In some embodiments, the communication device 70 also includes a sending unit 702.

[0372] The communication device 70 may be the first node or a chip of the first node. When the communication device 70 is used to implement the function of the first node in the above embodiment, each unit is specifically used to implement the following functions.

[0373] The receiving unit 701 is configured to receive SBFD information sent by the second node.

[0374] The sending unit 702 is configured to send configuration information to the third node.

[0375] Fig.15 A schematic diagram of another communication device provided in an embodiment of the present disclosure. Fig.15 As shown, the communication device 80 includes a sending unit 801.

[0376] The communication device 80 may be the second node or a chip of the second node. When the communication device 80 is used to implement the function of the second node in the above embodiment, each unit is specifically used to implement the following functions.

[0377] The sending unit 801 is configured to send SBFD information to a first node.

[0378] Fig.16 A schematic diagram of another communication device provided in an embodiment of the present disclosure. Fig.16 As shown, the communication device 90 includes a receiving unit 901. In some embodiments, the communication device 70 further includes a sending unit 902.

[0379] The communication device 90 may be the first node or a chip of the first node. When the communication device 90 is used to implement the function of the second node in the above embodiment, each unit is specifically used to implement the following functions.

[0380] The receiving unit 901 is configured to receive the multicast broadcast service information sent by the fourth node when a preset condition is met. The preset condition includes that the cell associated with the multicast broadcast service information is the cell associated with the first node.

[0381] In some embodiments, the sending unit 902 is used to send user location information to the fourth node, where the user location information includes the virtual location of the first node.

[0382] In some embodiments, the sending unit 902 is used to send network element selection information to the fourth node, and the network element selection information is used by the fourth node to select a network element.

[0383] It should be noted that Figures 14 to 16 The units in can also be called modules, for example, the acquisition unit can be called an acquisition module. Figures 14 to 16 In the illustrated embodiment, the names of the various units may not be the names shown in the figure. For example, the sending unit may be called a communication unit, and the receiving unit may be called a communication unit.

[0384] Figures 14 to 16 If each unit in the embodiment 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 this understanding, the technical solution of the embodiment of the present disclosure is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods of each embodiment of the present disclosure. The storage medium for storing computer software products includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program codes.

[0385] When the communication device 70, the communication device 80 or the communication device 90 implements the functions of the integrated modules in the form of hardware, the embodiment of the present disclosure provides a schematic diagram of the structure of the communication device. Fig.17 As shown, the communication device 100 includes: a processor 1002 , a communication interface 1003 , and a bus 1004 . Optionally, the communication device 100 may further include a memory 1001 .

[0386] The processor 1002 may be a processor that implements or executes various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of the present disclosure. The processor 1002 may 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 devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of the present disclosure. The processor 1002 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

[0387] The communication interface 1003 is used to connect with other devices via a communication network, such as Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0388] The memory 1001 may be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program codes in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto.

[0389] As a possible implementation, the memory 1001 may exist independently of the processor 1002, and the memory 1001 may be connected to the processor 1002 via the bus 1004 to store instructions or program codes. When the processor 1002 calls and executes the instructions or program codes stored in the memory 1001, the communication method provided in the embodiment of the present disclosure can be implemented.

[0390] In another possible implementation, the memory 1001 may also be integrated with the processor 1002 .

[0391] The bus 1004 may be an extended industry standard architecture (EISA) bus, etc. The bus 1004 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.17 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0392] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and conciseness of the description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the base station or terminal is divided into different functional modules to complete all or part of the functions described above.

[0393] The disclosed embodiment also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by computer instructions to instruct the relevant 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 memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. equipped on the above first node or second node. Further, the above computer-readable storage medium can also include both the internal storage unit of the above first node or second node and an 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 is to be output.

[0394] The embodiments of the present disclosure also provide a computer program product, which includes computer instructions. When the computer instructions are executed on a computer, the computer is enabled to execute any one of the communication methods provided in the above embodiments.

[0395] Although the present disclosure is described herein in conjunction with various embodiments, in the process of implementing the claimed disclosure, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0396] Although the present disclosure has been described in conjunction with specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present disclosure. Accordingly, this specification and the drawings are merely exemplary illustrations of the present disclosure as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present disclosure. Obviously, those skilled in the art may make various modifications and variations to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

[0397] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present disclosure should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: Applied to the first node, the method comprises: The sub-band full-duplex SBFD information sent by the second node is received.

2. The method according to claim 1, characterized in that The SBFD information includes at least one of the following: cell information of a target cell, the target cell including at least one of the following: a cell detected by the second node, a cell in which a radio link failure has occurred, a cell in which random access has been initiated, and 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 random access in SBFD random access configuration or SBFD partial bandwidth configuration; Information for selecting between multiple different types of random access configurations or SBFD fractional bandwidth configurations; Information used for cell selection and reselection in SBFD random access configuration or SBFD partial bandwidth configuration; Indication information used to indicate whether cross-link interference is detected under the corresponding SBFD resource configuration or random access configuration; A measured value of a cross-link interference reference signal detected under a corresponding SBFD resource configuration or random access configuration; Under the corresponding SBFD resource configuration or random access configuration, the interfering resource position is detected.

3. The method according to claim 2, characterized in that The relevant information for initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration includes at least one of the following: Number of random access initiations in SBFD random access configuration or SBFD partial bandwidth configuration; Indication information used to indicate whether a conflict is detected when random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration; Indication information used to indicate whether a fallback or switch occurs when random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration; The type of random access used after fallback or switchover occurs when random access is initiated under SBFD random access configuration or SBFD partial bandwidth configuration; The reason why a fallback or switch occurred when initiating random access in SBFD random access configuration or SBFD partial bandwidth configuration; Indication information used to indicate whether random access is successfully initiated under SBFD random access configuration or SBFD partial bandwidth configuration; Indication information used to indicate whether cross-link interference is detected when initiating random access under SBFD random access configuration or SBFD partial bandwidth configuration; The measured value of the cross-link interference reference signal is monitored by initiating random access under the SBFD random access configuration or the SBFD partial bandwidth configuration.

4. The method according to claim 2, characterized in that: The cell information includes at least one of the following: Physical cell identification; New air interface cell global identification; frequency.

5. The method according to claim 1, characterized in that The method further comprises: The configuration information is sent to the third node.

6. The method according to claim 5, characterized in that The configuration information is used to represent the SBFD resource configuration.

7. The method according to claim 6, characterized in that The SBFD resource configuration includes at least one of the following: Random access configuration under SBFD resource configuration; Bandwidth configuration under SBFD resource configuration.

8. The method according to claim 7, characterized in that The random access configuration under the SBFD resource configuration includes at least one of the following: Random access configuration under shared SBFD resource configuration; Random access configuration under dedicated SBFD resource configuration.

9. The method according to claim 7, characterized in that: The bandwidth part configuration under the SBFD resource configuration includes at least one of the following: Bandwidth part configuration under shared SBFD resource configuration; Bandwidth configuration under dedicated SBFD resource configuration.

10. The method according to claim 6, characterized in that The configuration information also includes at least one of the following: Indication information used to indicate whether the random access function under the SBFD resource configuration is enabled; SBFD resource configuration and random access configuration for common carriers or supplementary uplink carriers.

11. A communication method, characterized in that: Applied to the second node, the method comprises: The SBFD information is sent to the first node.

12. A communication method, characterized in that: Applied to the first node, the method comprises: The multicast broadcast service information sent by the fourth node is received when a preset condition is met, wherein the preset condition includes that a cell associated with the multicast broadcast service information is a cell associated with the first node.

13. The method according to claim 12, characterized in that The method further comprises: Sending user location information to the fourth node, the user location information including the virtual location of the first node.

14. The method according to claim 12, characterized in that The method further comprises: Sending network element selection information to the fourth node, where the network element selection information is used by the fourth node to select a network element.

15. The method according to claim 14, characterized in that The network element selection information includes at least one of the following: an access and mobility management function region identifier and an access and mobility management function set identifier derived from the globally unique access and mobility management function identifier; Requested network slice selection information; Local operator strategy; 5G cellular IoT functions indicated by the user equipment in the radio resource control signaling; Integrated access and return indication; Types of NB-IoT wireless access technologies; M-type instructions; New air interface simplified equipment indication; The specific network public network access indication indicated by the user equipment in the radio resource control signaling.

16. A communication device, characterized in that: include: Memory and processor; Memory and processor coupling; The memory is used to store instructions executable by the processor; When the processor executes the instructions, the method according to any one of claims 1 to 15 is performed.

17. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed on a computer, the computer is caused to perform the method according to any one of claims 1 to 15.

18. A computer program product, characterized in that The computer program product comprises computer instructions, which, when executed on a computer, cause the computer to perform the method according to any one of claims 1 to 15 .

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