Parameter indication method and communication apparatus

Abstract

The embodiment of the application discloses a parameter indication method and a communication device, relates to the field of communication, and can avoid the failure of DAPS switching to a certain extent. The method comprises the following steps: a first access network device determines a capability parameter for a first cell from a dual active protocol stack (DAPS) capability parameter supported by a terminal, the first cell is a source cell for DAPS switching of the terminal, and the first access network device is an access network device corresponding to the first cell; and the first access network device sends first information to a second access network device, wherein the first information is used for indicating the capability parameter for the first cell, and the second access network device is an access network device corresponding to a target cell for DAPS switching of the terminal.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of communications, and in particular to a parameter indication method and a communication device. BACKGROUND

[0002] The concept of dual active protocol stack (DAPS) handover is introduced in the R16 version of the 5th-generation (5G) standard. DAPS handover refers to a user equipment (UE) maintaining simultaneous connections with a source cell and a target cell to which the UE is to be handed over during the process of being handed over from the source cell to the target cell, and releasing the link with the source cell only after the link with the target cell is successfully established. Through DAPS handover, the interruption time caused by the UE handover process can be reduced, and the reliability of the UE handover can be improved.

[0003] DAPS handover is initiated by a source base station (i.e., a base station corresponding to a source cell), and before initiating the DAPS handover, the source base station selects appropriate UE capabilities to complete the configuration of the UE in the source cell according to DAPS capability information reported by the UE. The source base station can also send the configuration of the UE (source config) and the DAPS capability information of the UE to a target base station (i.e., a base station corresponding to a target cell), and the target base station can complete the configuration of the UE in the target cell according to the DAPS capability information of the UE.

[0004] The UE capabilities selected by the target base station can not match the UE capabilities selected by the source base station, resulting in the UE being unable to support this DAPS handover and causing the handover to fail. SUMMARY

[0005] Embodiments of the present application provide a parameter indication method and a communication device, which can avoid the failure of DAPS handover to some extent.

[0006] In a first aspect, a parameter indication method is provided, including: determining, by a first access network device, a capability parameter for a first cell from dual active protocol stack (DAPS) capability parameters supported by a terminal, the first cell being a source cell for the terminal to perform DAPS handover, and the first access network device being an access network device corresponding to the first cell; and sending, by the first access network device, first information to a second access network device, the first information being used to indicate the capability parameter for the first cell, and the second access network device being an access network device corresponding to a target cell for the terminal to perform DAPS handover.

[0007] In the method provided in the application, the source base station (for example, the first access network device) performing DAPS handover of the UE can indicate the capability parameter selected by the source base station for the source cell (for example, the first cell) to the target base station (for example, the second access network device), so that the target base station can determine the matched capability parameter according to the indication of the source base station, ensure that the source base station and the target base station keep consistent behavior in selecting the UE capability parameter, avoid the mismatch between the capability parameter for the source cell and the capability parameter for the target cell, and thus can avoid the problem of handover failure caused thereby.

[0008] With reference to the first aspect, in a first possible implementation manner of the first aspect, the first information comprises at least one of the following: information of a first frequency band combination, information of a first frequency band, information of a first capability parameter set, information of a capability parameter for the first cell; wherein the first frequency band is a frequency band corresponding to the first cell, the first frequency band combination is a frequency band combination corresponding to the first frequency band, and the first capability parameter set is a capability parameter set of the first frequency band.

[0009] The application further provides a specific implementation of the first information. Specifically, the first information can indicate a frequency band combination (BandCombination) selected by the source base station, or a frequency band (Band) selected by the source base station, or a featureset (that is, the first capability parameter set) selected by the source base station, or information of a capability parameter of a carrier for the first cell (that is, information of the capability information for the first cell).

[0010] With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the information of the first frequency band combination is an index of the first frequency band combination in a plurality of frequency band combinations supported by the terminal, the information of the first frequency band is an index of the first frequency band in the first frequency band combination, the information of the first capability parameter set is an index of the first capability parameter set in a plurality of capability parameter sets corresponding to the first frequency band, and the information of the capability parameter for the first cell is an index of the capability parameter for the first cell in the first capability parameter set.

[0011] In a specific implementation, the first information can comprise an index on a selection path of the capability parameter for the first cell, so that the second access network device can determine the capability parameter for the first cell according to the index in the first information, and thus select a capability parameter matched with the capability parameter for the first cell to configure the target cell.

[0012] With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the capability parameter for the first cell comprises an uplink capability parameter for the first cell and / or a downlink capability parameter for the first cell.

[0013] In the present application, the source base station can select the uplink capability parameter and the downlink capability parameter when selecting the capability parameter for the first cell, supporting the UE to maintain the connection with the source cell in the DAPS handover process. In the scenario where the source base station corresponds to the selection of the uplink capability parameter and the downlink capability parameter, that is, the uplink capability parameter and the downlink capability parameter for the source cell correspond to the same carrier, only the uplink capability parameter for the first cell or the downlink capability parameter for the first cell can be indicated. When the uplink capability parameter and the downlink capability parameter for the source cell correspond to different carriers, the uplink capability parameter for the first cell and the downlink capability parameter for the first cell are indicated.

[0014] With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the index of the capability parameter for the first cell in the first capability parameter set includes a carrier index of the uplink capability parameter for the first cell in the uplink capability parameter corresponding to the first capability parameter set and / or a carrier index of the downlink capability parameter for the first cell in the downlink capability parameter corresponding to the first capability parameter set.

[0015] In the present application, the index of the uplink capability parameter and the downlink capability parameter can be indicated, so as to determine the uplink capability parameter and the downlink capability parameter for the source base station by the target base station.

[0016] With reference to the first aspect or any possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the first information is carried in the handover request message.

[0017] The present application provides a specific implementation of sending the first information.

[0018] With reference to the first aspect or any possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the first information is carried in the handover request message, including that the handover request message includes handover preparation information, and the handover preparation information includes the first information.

[0019] In a second aspect, a parameter indication method is provided, including: receiving, by a second access network device, first information from a first access network device, the first information being used to indicate a capability parameter for a first cell, the first cell being a source cell for a terminal in a dual active protocol stack (DAPS) handover, and the first access network device being an access network device corresponding to the first cell; and determining, by the second access network device according to the first information, a capability parameter for a second cell, the capability parameter for the second cell belonging to a same capability parameter set as the capability parameter for the first cell, or information of a capability parameter set corresponding to the capability parameter for the second cell being the same as information of a capability parameter set corresponding to the capability parameter for the second cell, the second access network device being an access network device corresponding to the second cell.

[0020] With reference to the second aspect, in a first possible implementation form of the second aspect, the first information comprises at least one of: information of a first frequency band combination, information of a first frequency band, information of a first capability parameter set, information of a capability parameter for the first cell; wherein the first frequency band is a frequency band corresponding to the first cell, the first frequency band combination is a frequency band combination corresponding to the first frequency band, and the first capability parameter set is a capability parameter set of the first frequency band.

[0021] With reference to the second aspect or any one of the possible implementation forms of the second aspect, in a second possible implementation form of the second aspect, the information of the first frequency band combination is an index of the first frequency band combination in a plurality of frequency band combinations supported by the terminal, the information of the first frequency band is an index of the first frequency band in the first frequency band combination, the information of the first capability parameter set is an index of the first capability parameter set in a plurality of capability parameter sets corresponding to the first frequency band, and the information of the capability parameter for the first cell is an index of the capability parameter for the first cell in the first capability parameter set.

[0022] With reference to the second aspect or any one of the possible implementation forms of the second aspect, in a third possible implementation form of the second aspect, the capability parameter for the first cell comprises an uplink capability parameter for the first cell and / or a downlink capability parameter for the first cell.

[0023] With reference to the second aspect or any one of the possible implementation forms of the second aspect, in a fourth possible implementation form of the second aspect, the index of the capability parameter for the first cell in the first capability parameter set comprises a carrier index of the uplink capability parameter for the first cell in uplink capability parameters corresponding to the first capability parameter set and / or a carrier index of the downlink capability parameter for the first cell in downlink capability parameters corresponding to the first capability parameter set.

[0024] With reference to the second aspect or any one of the possible implementation forms of the second aspect, in a fifth possible implementation form of the second aspect, the first information is carried in a handover request message.

[0025] With reference to the second aspect or any one of the possible implementation forms of the second aspect, in a sixth possible implementation form of the second aspect, the first information is carried in a handover request message, and the handover request message comprises handover preparation information, and the handover preparation information comprises the first information.

[0026] In a third aspect, a communication apparatus is provided, which is a first access network device or a component in the first access network device. The communication apparatus comprises: a processing unit, configured to determine a capability parameter for a first cell from a dual active protocol stack (DAPS) capability parameter supported by a terminal, the first cell being a source cell for DAPS handover of the terminal, and the first access network device being an access network device corresponding to the first cell; and a communication unit, configured to send first information to a second access network device, the first information being used to indicate the capability parameter for the first cell, and the second access network device being an access network device corresponding to a target cell for DAPS handover of the terminal.

[0027] With reference to the third aspect, in a first possible implementation manner of the third aspect, the first information comprises at least one of: information of a first frequency band combination, information of a first frequency band, information of a first capability parameter set, and information of the capability parameter for the first cell; wherein the first frequency band is a frequency band corresponding to the first cell, the first frequency band combination is a frequency band combination corresponding to the first frequency band, and the first capability parameter set is a capability parameter set of the first frequency band.

[0028] With reference to the third aspect or any possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the information of the first frequency band combination is an index of the first frequency band combination in a plurality of frequency band combinations supported by the terminal, the information of the first frequency band is an index of the first frequency band in the first frequency band combination, the information of the first capability parameter set is an index of the first capability parameter set in a plurality of capability parameter sets corresponding to the first frequency band, and the information of the capability parameter for the first cell is an index of the capability parameter for the first cell in the first capability parameter set.

[0029] With reference to the third aspect or any possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the capability parameter for the first cell comprises an uplink capability parameter for the first cell and / or a downlink capability parameter for the first cell.

[0030] With reference to the third aspect or any possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the index of the capability parameter for the first cell in the first capability parameter set comprises a carrier index of the uplink capability parameter for the first cell in uplink capability parameters corresponding to the first capability parameter set and / or a carrier index of the downlink capability parameter for the first cell in downlink capability parameters corresponding to the first capability parameter set.

[0031] With reference to the third aspect or any possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the first information is carried in a handover request message.

[0032] In combination with any of the third aspects or above, in the sixth possible implementation of the third aspect, the first information is carried in the handover request message, including: the handover request message includes handover preparation information, and the handover preparation information includes the first information.

[0033] Fourthly, a communication device is provided, which is a second access network device or a component of a second access network device. The communication device includes: a communication unit for receiving first information from a first access network device, the first information indicating capability parameters for a first cell, the first cell being the source cell for a terminal to perform Dual Active Protocol Stack (DAPS) handover, and the first access network device being the access network device corresponding to the first cell; and a processing unit for determining capability parameters for a second cell based on the first information, wherein the capability parameters for the second cell belong to the same capability parameter set as the capability parameters for the first cell, or the information of the capability parameter set corresponding to the capability parameters for the second cell is the same as the information of the capability parameter set corresponding to the capability parameters for the second cell, and the second access network device being the access network device corresponding to the second cell.

[0034] In conjunction with the fourth aspect, in the first possible implementation of the fourth aspect, the first information includes at least one of the following: information on the first frequency band combination, information on the first frequency band, information on the first capability parameter set, and information on capability parameters for the first cell; wherein, the first frequency band is the frequency band corresponding to the first cell, the first frequency band combination is the frequency band combination corresponding to the first frequency band, and the first capability parameter set is the capability parameter set of the first frequency band.

[0035] In conjunction with any possible implementation of the fourth aspect or above, in the second possible implementation of the fourth aspect, the information of the first frequency band combination is the index of the first frequency band combination in the multiple frequency band combinations supported by the terminal, the information of the first frequency band is the index of the first frequency band in the first frequency band combination, the information of the first capability parameter set is the index of the first capability parameter set in the multiple capability parameter sets corresponding to the first frequency band, and the information of the capability parameters for the first cell is the index of the capability parameters for the first cell in the first capability parameter set.

[0036] In combination with any of the fourth aspects or above, in the third possible implementation of the fourth aspect, the capability parameters for the first cell include uplink capability parameters and / or downlink capability parameters for the first cell.

[0037] In combination with any of the fourth aspects or above, in the fourth possible implementation of the fourth aspect, the index of the capability parameters for the first cell in the first capability parameter set includes the carrier index of the uplink capability parameters for the first cell in the uplink capability parameters corresponding to the first capability parameter set and / or the carrier index of the downlink capability parameters for the first cell in the downlink capability parameters corresponding to the first capability parameter set.

[0038] In combination with any of the fourth aspects or above, in the fifth possible implementation of the fourth aspect, the first information is carried in the switching request message.

[0039] In combination with any of the fourth aspects or above, in the sixth possible implementation of the fourth aspect, the first information is carried in the handover request message, including: the handover request message includes handover preparation information, and the handover preparation information includes the first information.

[0040] Fifthly, a communication device is provided, comprising at least one processor and a memory, wherein the at least one processor is coupled to the memory; the memory is used to store a computer program;

[0041] The at least one processor is configured to execute a computer program stored in the memory, such that the apparatus performs the method as described in the first aspect and any implementation thereof, or the method as described in the second aspect and any implementation thereof.

[0042] A sixth aspect provides a computer-readable storage medium, comprising: instructions stored in the computer-readable storage medium; and, when the computer-readable storage medium is operated on a communication device according to the second aspect and any implementation thereof, causing the communication device to perform a communication method as described in the first aspect and any implementation thereof, or causing the communication device to perform a method as described in the second aspect and any implementation thereof.

[0043] In a seventh aspect, a wireless communication device is provided, comprising a processor, for example, applied in the communication device, for implementing the method described in the first aspect and any implementation thereof, wherein the communication device may be, for example, a chip system. In one feasible implementation, the chip system further comprises a memory for storing program instructions and data necessary for implementing the functions of the method described in the first aspect.

[0044] The chip system mentioned above can be a system on chip (SOC) or a baseband chip, etc. The baseband chip can include processors, channel encoders, digital signal processors, modems and interface modules, etc.

[0045] Eighthly, a wireless communication device is provided, comprising a processor, for example, applied in the communication device for implementing the method described in the second aspect and any implementation thereof, wherein the communication device may be, for example, a chip system. In one feasible implementation, the chip system further comprises a memory for storing program instructions and data necessary for implementing the function of the method described in the first aspect.

[0046] The chip system mentioned above can be a system on chip (SOC) or a baseband chip, etc. The baseband chip can include processors, channel encoders, digital signal processors, modems and interface modules, etc.

[0047] Ninth aspect, a computer program product is provided, the computer program product including instructions that, when executed, cause the communication method as described in the first aspect and any implementation thereof to be executed, or cause the method as described in the second aspect and any implementation thereof to be executed.

[0048] In a tenth aspect, a chip is provided, the chip including a processor and an interface circuit coupled to the processor, the processor being configured to execute a computer program or instructions to cause the communication method as described in the first aspect and any implementation thereof to be executed, or to cause the method as described in the second aspect and any implementation thereof to be executed.

[0049] Eleventhly, a communication system is provided, the communication system including the access network device described in any of the above implementations, the access network device described in any of the above implementations, and a terminal. Attached Figure Description

[0050] Figure 1 An architecture diagram of the communication system provided in the embodiments of this application;

[0051] Figure 2 This is a schematic diagram of DAPS switching provided in an embodiment of this application;

[0052] Figure 3 A schematic diagram illustrating the structure of capability information provided in the embodiments of this application;

[0053] Figure 4aThis is a schematic diagram of the structure of the communication device provided in the embodiments of this application;

[0054] Figure 4b Another schematic diagram of the communication device provided in the embodiments of this application;

[0055] Figure 5 A flowchart illustrating the parameter indication method provided in this application embodiment;

[0056] Figure 6 This is a schematic diagram illustrating the capability parameter selection path provided in the embodiments of this application;

[0057] Figures 7-8 Another structural block diagram of the communication device provided in the embodiments of this application. Detailed Implementation

[0058] The method provided in the embodiments of this application is applicable to Figure 1 The communication system shown. (As shown) Figure 1 As shown, the communication system may include: a terminal 10 and multiple network devices 20.

[0059] The network device can also be referred to as a wireless access network device or a next-generation wireless access network device. Terminal 10 can communicate with network device 20. Network device 20 can provide terminal 10 with functions such as wireless resource management, quality of service management, data encryption, and compression. Different network devices 20 can communicate with each other via the Xn interface.

[0060] Terminal 10 is located within the coverage area of ​​one or more cells (carriers) provided by network device 20. There can be one or more cells serving the terminal. When there are multiple serving cells for the terminal, the terminal can operate in CA, dual connectivity (DC), or cooperative multipoint transmission mode.

[0061] Optionally, the communication system may also include core network equipment (not shown in the figure), which can communicate with network equipment 20 via a next-generation (NG) interface.

[0062] Optionally, the communication system may be a universal mobile telecommunications system (UMTS), a code division multiple access (CDMA) system, a wireless local area network (WLAN), a wideband code division multiple access (WCDMA) system, a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, a universal mobile telecommunications system (UMTS), a fifth-generation (5G) communication system, or other wireless communication systems that use orthogonal frequency division multiplexing (OFDM) technology. This application does not limit the specific type of the communication system.

[0063] Alternatively, the terminal 10 in this communication system may also be referred to as UE, mobile station (MS), mobile terminal (MT), etc. Terminal 10 may be a device that provides voice and / or data connectivity to a user, such as a mobile phone (“cellular” phone), cell phone, computer, cordless phone, session initiation protocol (SIP) phone, wireless local loop (WLL) station, personal digital assistant (PDA), laptop computer, handheld communication device, handheld computing device, satellite wireless device, wireless modem card, set-top box (STB), customer premises equipment (CPE), wearable device (e.g., smartwatch, smart bracelet, pedometer, etc.), in-vehicle equipment (e.g., car, bicycle, electric vehicle, airplane, ship, train, high-speed rail, etc.), virtual reality (VR) device, augmented reality (AR) device, wireless terminal in industrial control, smart home device (e.g., refrigerator, television, air conditioner, electricity meter, etc.), intelligent robot, workshop equipment, wireless terminal in self-driving, remote medical... Wireless terminals in various applications, including those in smart grids, transportation safety, smart cities, or smart homes, as well as flying devices (e.g., intelligent robots, hot air balloons, drones, airplanes) and other devices used for communication over wireless systems, are not limited to any particular form of terminal 310.

[0064] In some embodiments, network device 20 may be a next-generation node B (gNB), an evolved node B (eNB), a next-generation evolved node B (ng-eNB), a transmission reception point (TRP), a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., a home evolved NodeB, or a home NodeB, HNB), a base band unit (BBU), or a wireless fidelity (Wi-Fi) access point (AP), a central unit (CU), a distributed unit (DU), a central unit-control plane (CU-CP), a central unit-user plane (CU-UP), etc.

[0065] Among them, gNB can provide terminal 10 with control plane and / or user plane protocols and functions for new radio (NR) and access the 5G core network (5th generation core, 5GC).

[0066] The ng-eNB can provide Terminal 10 with control plane and / or user plane protocols and functions of evolved universal terrestrial radio access (E-UTRA) and access 5GC.

[0067] The CU mainly includes the RRC layer, service data adaptation protocol (SDAP) layer, and packet data convergence protocol (PDCP) layer of gNB, or the RRC layer and PDCP layer of ng-eNB.

[0068] The DU mainly includes the radio link control (RLC) layer, medium access control (MAC) layer, and physical layer of the gNB or ng-eNB.

[0069] CU-CP mainly includes the RRC layer in gNB-CU or ng-eNB-CU, and the control plane in the PDCP layer.

[0070] CU-UP mainly includes the SDAP layer in gNB-CU or ng-eNB-CU, and the user plane in the PDCP layer.

[0071] Understandably, the aforementioned Figure 1 The communication system shown is merely for illustrating the technical solutions of the embodiments of this application more clearly and does not constitute a limitation on the technical solutions provided in the embodiments of this application. For example, the communication system may also include other devices, such as network control devices. The network control device may be an operation administration and maintenance (OAM) system, also known as a network management system. The network control device can manage the aforementioned network device 20.

[0072] Furthermore, as those skilled in the art will recognize, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0073] Release 16 of the 5G standard introduced the concept of Dual Active Protocol Stack (DAPS) handover. DAPS handover refers to the process where a user equipment (UE) maintains simultaneous connections with both the source cell and the target cell during the handover from a source cell to a target cell, until the link with the target cell is successfully established before releasing the link with the source cell.

[0074] Figure 2 This is a diagram illustrating DAPS switching. (Example) Figure 2 As shown, before DAPS handover, the UE communicates with the source cell via the link. During DAPS handover, the UE maintains simultaneous connections with both the source and target cells; that is, while accessing the target cell, the UE maintains communication with the source cell via the link. Only after the UE successfully accesses the target cell and the link with the target cell is successfully established, i.e., after the DAPS handover is completed, will the UE release the link with the source cell. DAPS handover can reduce the downtime caused by the UE handover process and improve the reliability of UE handover.

[0075] It should be noted that the source and target cells for DAPS handover by a UE can be co-frequency cells, meaning the source and target cells correspond to the same frequency band. Of course, the source and target cells can also be inter-frequency cells, meaning the source and target cells correspond to different frequency bands.

[0076] Before the source base station (the base station corresponding to the source cell) initiates DAPS handover, it can initiate a UE capability query process, and the UE can report the DAPS capabilities it supports to the source base station.

[0077] The following combination Figure 3 Describe the capability information reported by the UE. Figure 3 The illustration shows a schematic diagram of capability information provided in an embodiment of this application. Taking the terminal capability information as "UECapabilityInformation" as an example, "UECapabilityInformation" includes "Phy-Parameters", "RF-Parameters", "PDCP-Parameters", "RLC-Parameters", "MAC-Parameters", etc.

[0078] The "Phy-Parameters" field contains the UE's physical parameters; the "RF-Parameters" field contains the UE's radio frequency (RF) parameters; the "PDCP-Parameters" field contains the UE's packet data convergence protocol (PDCP) parameters; the "RLC-Parameters" field contains the UE's radio link control (RLC) parameters; and the "MAC-Parameters" field contains the UE's medium access control (MAC) parameters.

[0079] The “RF-Parameters” field may include the “supportBandCombinationList” field, which may contain multiple BandCombination fields, each indicating a BandCombination supported by the UE. The value of the BandCombination field can be the index of the BandCombination in the supportBandCombinationList.

[0080] The BandCombination field can include the Bandlist field and the "featureSetCombinationDAPS" field. The Bandlist field indicates the multiple bands included in the BandCombination corresponding to the Bandlist field, such as Band1, Band2, etc. The "featureSetCombinationDAPS" field indicates a featureSetCombination, and its value can be the index of the featureSetCombination in the featureSetCombinationlist (feature SetCombinations).

[0081] The featureSetCombination mentioned above can be called the band combination level capability parameter (featureSetBa ndCombination). The band combination level capability parameter set is applicable to the band combination corresponding to this capability parameter set. For example, see [reference]. Figure 3 The UE supports two frequency band combinations, namely BandCombination1 and BandCombination2. The "featureSetCombinationDAPS" field included in BandCombination1 points to a set of capability parameters at the frequency band combination level, and the "featureSetCombinationDAPS" field included in BandCombination2 points to a set of capability parameters at the frequency band combination level.

[0082] A band-level capability parameter set includes one or more band-level capability parameter sets (featureSetPerBand), and each band-level capability parameter set is applicable to the corresponding frequency band. For example, see [reference]. Figure 3 BandCombination1 includes Band1 and Band2. The capability parameter set corresponding to BandCombination1 can include the capability parameter sets corresponding to Band1 and Band2, both of which are frequency band-level capability parameter sets. The frequency band-level capability parameter set can be indicated by the "featureSetPerBand" field included in the "featureSetCombination" field. The value of the "featureSetPerBand" field can be frequency band information, such as the index of the frequency band in the corresponding frequency band combination.

[0083] A frequency band-level capability parameter set includes one or more different capability parameter sets (feature sets), for example, see reference. Figure 3 The capability parameter sets corresponding to Band1 include featureSet1 and featureSet2. featureSet1 and featureSet2 are two different capability parameter sets applicable to Band1. The "featureSet" field under the "featureSetPerBand" field can indicate different capability parameter sets under the same Band. The "featureSet" field can point to the uplink capability parameters at the frequency band level and the downlink capability parameters at the frequency band level. The value of the "featureSet" field includes "downlinkID + uplink ID".

[0084] A feature set includes uplink capability parameters and downlink capability parameters. The uplink capability parameters are indicated by the "featureSetuplink" field under the "featureSet" field, and include the capability parameters of each uplink component carrier (CC) supported by the UE in the frequency band corresponding to the feature set. The downlink capability parameters are indicated by the "featureSetdownlink" field under the "featureSet" field, and include the capability parameters of each downlink CC supported by the UE in the frequency band corresponding to the feature set. For example, refer to [reference needed]. Figure 3 featureSet1 includes the fields “featureSetdownlink” and “featureSetuplink”.

[0085] Uplink capability parameters include carrier-level uplink capability parameters, and downlink capability parameters include carrier-level downlink capability parameters. For example, refer to... Figure 3 The featureSet1 field includes the “featureSetdownlink” and “featureSetuplink” fields. The value of the featureSet1 field includes the downlink ID and the uplink ID, the value of the “featureSetdownlink” field includes the downlink ID of CC1 and the downlink ID of CC2, and the value of the “featureSetuplink” field includes the uplink ID of CC1 and the uplink ID of CC2.

[0086] The “featureSetuplink” field indicates the uplink capability parameters of CC1 included in Band1 and the uplink capability parameters of CC2 included in Band1. The “featureSetuplinkPerCC1” field indicates the carrier-level uplink capability parameters, i.e., the uplink capability parameters applicable to CC1, and the “featureSetuplinkPerCC2” field indicates the carrier-level uplink capability parameters, i.e., the uplink capability parameters applicable to CC2. The “featureSetdownlink” field indicates the downlink capability parameters of CC1 included in Band1 and the downlink capability parameters of CC2 included in Band1. The “featureSetdownlinkPerCC1” field indicates the carrier-level downlink capability parameters, i.e., the downlink capability parameters applicable to CC1, and the “featureSetdownlinkPerCC2” field indicates the carrier-level downlink capability parameters, i.e., the downlink capability parameters applicable to CC2.

[0087] In one possible implementation, the uplink capability parameters or downlink capability parameters can be the carrier bandwidth, subcarrier spacing, etc.

[0088] It should be noted that the information included in the “featureSetCombinationDAPS” field and its subfields is not limited to what has been described above, and may also include other information. This application embodiment does not impose any restrictions on this.

[0089] After receiving the capability information reported by the UE, the source base station determines that the UE meets the DAPS handover conditions and then actively initiates a DAPS handover. Before initiating the DAPS handover, the source base station sends the source cell configuration information and the DAPS capability information reported by the UE to the target base station. The source base station can also complete the configuration of the source cell based on the UE's DAPS capability information, that is, select capability parameters for the source cell from the UE's DAPS capability information, such as the subcarrier spacing and carrier bandwidth supported by the UE.

[0090] After receiving the DAPS capability information from the source base station, the target base station can complete the configuration of the UE in the target cell based on the UE's DAPS capability information. That is, it can select capability parameters for the target cell from the UE's DAPS capability information, such as the subcarrier spacing and carrier bandwidth supported by the UE.

[0091] The UE capabilities selected by the target base station may not match those selected by the source base station, causing the UE to be unable to support the DAPS handover and resulting in handover failure. For example, the capability parameters selected by the source base station for the source cell and the capability parameters selected by the target base station for the target cell may not match, causing the UE to be unable to support the DAPS handover.

[0092] This application provides a parameter indication method in which a source base station can indicate to a target base station the capability parameters selected by the source base station for the source cell. This allows the target base station to determine matching capability parameters based on the indication from the source base station, ensuring that the source base station and the target base station maintain consistent behavior in selecting UE capability parameters. This avoids mismatch between the capability parameters used for the source cell and the capability parameters used for the target cell, thereby preventing handover failures caused by mismatch.

[0093] It should be noted that in the description of this application, the words "first" and "second" are merely for distinguishing descriptions and are not used to specifically limit any feature. In the description of the embodiments of this application, "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the related objects before and after it are in an "or" relationship. In this application, "at least one" refers to one or more; "multiple" refers to two or more.

[0094] The terminal described in this application embodiment can be accessed via... Figure 4a This is achieved through the communication device 410. Figure 4a The diagram shown is a hardware structure schematic of the communication device 410 provided in an embodiment of this application. The communication device 410 includes a processor 4101 and at least one communication interface. Figure 4a (This is merely an example illustration using a communication interface 4103 as an example only.) Optionally, a memory 4102 may also be included. The processor 4101, memory 4102, and communication interface 4103 are interconnected.

[0095] The processor 4101 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits used to control the execution of the program of the present application.

[0096] Communication interface 4103 uses any transceiver-like device for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc.

[0097] The memory 4102 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital versatile optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto. The memory may exist independently or be connected to the processor. The memory may also be integrated with the processor.

[0098] The memory 4102 stores computer execution instructions for implementing the scheme of this application, and the processor 4101 controls the execution. The processor 4101 executes the computer execution instructions stored in the memory 4102, thereby implementing the intent processing method provided in the following embodiments of this application.

[0099] Optionally, the computer execution instructions in the embodiments of this application may also be referred to as application code, and the embodiments of this application do not specifically limit this.

[0100] In a specific implementation, as one example, the processor 4101 may include one or more CPUs, for example... Figure 4a CPU0 and CPU1 in the CPU.

[0101] In a specific implementation, as one example, the communication device 410 may include multiple processors, such as... Figure 4a Processors 4101 and 4106 are mentioned. Each of these processors can be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor here can refer to one or more devices, circuits, and / or processing cores used to process data (e.g., computer program instructions).

[0102] In a specific implementation, as one embodiment, the communication device 410 may further include an output device 4104 and an input device 4105. The output device 4104 communicates with the processor 4101 and can display information in various ways. For example, the output device 4104 may be a liquid crystal display (LCD), a light-emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector, etc. The input device 4105 communicates with the processor 4101 and can receive user input in various ways. For example, the input device 4105 may be a mouse, keyboard, touchscreen device, or sensing device, etc.

[0103] The aforementioned communication device 410 can be a general-purpose device or a dedicated device. In specific implementations, the communication device 410 can be a desktop computer, a portable computer, a network server, a handheld digital assistant (PDA), a mobile phone, a tablet computer, a wireless terminal device, an embedded device, or something similar. Figure 4a Devices with similar structures. This application does not limit the type of communication device 410 to any particular embodiment.

[0104] It should be noted that the communication device 410 can be a complete terminal unit, a functional component or assembly on the terminal, or a communication chip, such as a baseband chip. When the communication device 410 is a complete terminal unit, the communication interface can be a radio frequency module. When the communication device 410 is a communication chip, the communication interface 4103 can be the input / output interface circuit of the chip, which is used to read and output baseband signals.

[0105] Figure 4b This is a schematic diagram of a communication device. The communication device 420 can be a network device as described in the embodiments of this application, such as an AMF or an SMF.

[0106] The communication device includes at least one processor 4201, at least one transceiver 4203, at least one network interface 4204, and one or more antennas 4205. Optionally, it also includes at least one memory 4202. The processor 4201, memory 4202, transceiver 4203, and network interface 4204 are connected, for example, via a bus. The antenna 4205 is connected to the transceiver 4203. The network interface 4204 is used for the communication device to connect to other communication devices via a communication link, for example, the communication device connects to a core network element via an S1 interface. In this embodiment, the connection may include various interfaces, transmission lines, or buses, etc., and this embodiment is not limited thereto.

[0107] The processor in this embodiment, such as processor 4201, may include at least one of the following types: a general-purpose central processing unit (CPU), a digital signal processor (DSP), a microprocessor, an application-specific integrated circuit (ASIC), a microcontroller unit (MCU), a field-programmable gate array (FPGA), or an integrated circuit for implementing logic operations. For example, processor 4201 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. At least one processor 4201 may be integrated into a single chip or located on multiple different chips.

[0108] The memory in this application embodiment, such as memory 4202, may include at least one of the following types: read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions; random access memory (RAM) or other types of dynamic storage devices capable of storing information and instructions; or electrically erasable programmable-only memory (EEPROM). In some scenarios, the memory may also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures that can be accessed by a computer, but is not limited thereto.

[0109] The memory 4202 can exist independently and be connected to the processor 4201. Optionally, the memory 4202 can also be integrated with the processor 4201, for example, integrated within a single chip. The memory 4202 can store program code that executes the technical solutions of the embodiments of this application, and its execution is controlled by the processor 4201. The various types of computer program code being executed can also be considered as drivers for the processor 4201. For example, the processor 4201 is used to execute the computer program code stored in the memory 4202, thereby implementing the technical solutions of the embodiments of this application.

[0110] Transceiver 4203 can be used to support the reception or transmission of radio frequency (RF) signals between a communication device and a terminal. Transceiver 4203 can be connected to antenna 4205. Specifically, one or more antennas 4205 can receive RF signals. Transceiver 4203 can receive the RF signals from the antennas, convert the RF signals into digital baseband signals or digital intermediate frequency (IF) signals, and provide the digital baseband signals or IF signals to processor 4201 so that processor 4201 can perform further processing on the digital baseband signals or IF signals, such as demodulation and decoding. Furthermore, transceiver 4203 can receive modulated digital baseband signals or IF signals from processor 4201, convert the modulated digital baseband signals or IF signals into RF signals, and transmit the RF signals through one or more antennas 4205. Specifically, transceiver 4203 can selectively perform one or more stages of downmixing and analog-to-digital conversion on the radio frequency signal to obtain a digital baseband signal or a digital intermediate frequency signal. The order of the downmixing and analog-to-digital conversion processes is adjustable. Transceiver 4203 can selectively perform one or more stages of upmixing and digital-to-analog conversion on the modulated digital baseband signal or digital intermediate frequency signal to obtain a radio frequency signal. The order of the upmixing and digital-to-analog conversion processes is also adjustable. Digital baseband signals and digital intermediate frequency signals can be collectively referred to as digital signals. The transceiver can be called a transceiver circuit, transceiver unit, transceiver device, transmitting circuit, transmitting unit, or transmitting device, etc.

[0111] It should be noted that the communication device 420 can be a complete communication device, a component or assembly that implements the functions of the communication device, or a communication chip. When the communication device 420 is a communication chip, the transceiver 4203 can be the interface circuit of the chip, which is used to read and output baseband signals.

[0112] This application provides a parameter indication method, such as... Figure 5 As shown, the method includes the following steps:

[0113] 501. The first access network device determines the capability parameters for the first cell from the DAPS capability parameters supported by the terminal.

[0114] Wherein, the first cell is the source cell for the terminal to perform DAPS handover, and the first access network device is the access network device corresponding to the first cell, that is, the first cell is the serving cell of the first access network device. The DAPS capability parameters supported by the terminal can be the capability parameters indicated by the "featureSetCombination DAPS" field in the capability information reported by the UE.

[0115] In practice, the first access network device selects carrier-level capability parameters from the DAPS capability parameters supported by the terminal, including carrier-level uplink capability parameters and carrier-level downlink capability parameters. The first cell is configured using the selected carrier-level uplink and downlink capability parameters to maintain connectivity with the first cell during DAPS handover.

[0116] In one possible implementation, when the UE supports multiple band combinations, in step 501, the first access network device selects one band combination from the multiple band groups supported by the UE, for example, Band Combination 1. Subsequently, capability parameters for the first cell are selected from the capability parameter set at the band combination level corresponding to this band combination. Of course, if the UE only supports one band combination, the capability parameters for the first cell are selected from the capability parameter set at the band combination level corresponding to that band combination.

[0117] When the frequency band combination supported by the UE includes multiple frequency bands, after the first access network device determines a set of capability parameters at the frequency band combination level, it first selects a set of capability parameters at the frequency band combination level, and then selects capability parameters for the first cell from the set of capability parameters at the frequency band level. Of course, if the frequency band combination supported by the UE includes only one frequency band, then the capability parameters for the first cell are selected from the set of capability parameters at the frequency band level corresponding to that frequency band.

[0118] For a frequency band in the frequency band combination supported by the UE, it can correspond to one or more different feature sets. After the first access network device selects the frequency band combination and the frequency band in sequence, it needs to select one feature set from one or more different feature sets corresponding to the frequency band.

[0119] A featureSet can contain uplink capability parameters and downlink capability parameters. Uplink capability parameters include one or more sets of uplink capability parameters at different carrier levels. The first access network device can also select a set of uplink capability parameters from these sets, such as the capability parameters indicated by the "featureSetuplinkPerCC1" field. Downlink capability parameters include one or more sets of downlink capability parameters at different carrier levels. The first access network device can also select a set of downlink capability parameters from these sets, such as the capability parameters indicated by the "featureSetdownlinkPerCC1" field.

[0120] It should be noted that the uplink and downlink capability parameters selected by the first access network device can be bound together, meaning the uplink and downlink capability parameters correspond to the same carrier. For example, the capability parameters indicated by the "featureSetuplinkPerCC1" field and "featureSetdownlinkPerCC1" can be selected. Alternatively, the capability parameters indicated by the "featureSetdownlinkPerCC1" field and "featureSetuplinkPerCC1" can be selected. In another possible implementation, the uplink and downlink capability parameters selected by the first access network device are not bound together, meaning the uplink and downlink capability parameters correspond to different carriers. For example, the capability parameters indicated by the "featureSetuplinkPerCC1" field and "featureSetdownlinkPerCC2" can be selected. Alternatively, the capability parameters indicated by the "featureSetdownlinkPerCC1" field and "featureSetuplinkPerCC2" can be selected. In this embodiment, the capability parameters for the first cell include the uplink and downlink capability parameters selected by the first access network device. For example, it includes capability parameters indicated by the “featureSetuplinkPerCC1” field and capability parameters indicated by the “featureSetdownlinkPerCC1” field.

[0121] 502. The first access network device sends first information to the second access network device, the first information being used to indicate the capability parameters for the first cell.

[0122] In this embodiment, the second access network device is the access network device corresponding to the target cell for the DAPS handover performed by the terminal. The target cell for the DAPS handover can be referred to as the second cell. The first access network device uses first information to indicate the configuration of the source cell (i.e., the first cell), specifically the capability parameters used for the first cell. This allows the second access network device to select capability parameters from the UE's capability information that match the capability parameters of the first cell to configure the second cell. This minimizes the mismatch between the capability parameters used for the second cell and those used for the first cell, thereby ensuring that the terminal supports the DAPS handover initiated by the first access network device and guarantees a successful DAPS handover.

[0123] In a specific implementation, the first information includes at least one of the following: information on the first frequency band combination, information on the first frequency band, information on the first capability parameter set, and information on the capability parameters for the first cell; wherein, the first frequency band is the frequency band corresponding to the first cell, the first frequency band combination is the frequency band combination corresponding to the first frequency band, and the first capability parameter set is the capability parameter set of the first frequency band.

[0124] In one possible implementation, the information of the first frequency band combination is the index of the first frequency band combination among multiple frequency band combinations supported by the terminal, the information of the first frequency band is the index of the first frequency band in the first frequency band combination, the information of the first capability parameter set is the index of the first capability parameter set in multiple capability parameter sets corresponding to the first frequency band, and the information of the capability parameters for the first cell is the index of the capability parameters for the first cell in the first capability parameter set.

[0125] Optionally, the capability parameters for the first cell include uplink capability parameters for the first cell and / or downlink capability parameters for the first cell.

[0126] In one possible implementation, the index of the capability parameters for the first cell in the first capability parameter set includes the carrier index of the uplink capability parameters for the first cell in the uplink capability parameters corresponding to the first capability parameter set and / or the carrier index of the downlink capability parameters for the first cell in the downlink capability parameters corresponding to the first capability parameter set.

[0127] It should be noted that the feature set includes uplink capability parameters at the frequency band level (featureSetuplink) and downlink capability parameters at the frequency band level (featureSetdownlink). The uplink capability parameters at the carrier level can be determined from the featureSetuplink based on the carrier index, and the downlink capability parameters at the carrier level can be determined from the featureSetdownLink based on the carrier index.

[0128] The following combination Figure 3 The following details several possible implementations of the first information:

[0129] In the first approach, if the terminal supports multiple frequency band combinations, the first access network device can select one of the frequency band combinations and determine the corresponding frequency band combination-level capability parameter set. In this implementation, the first information includes information about the frequency band combination selected by the first access network device, so that the second access network device can determine the frequency band combination selected by the first access network device.

[0130] For example, the first information includes information about the first frequency band combination, such as BandComBination1. The information about the first frequency band combination could be the index of BandComBination1 in the band combination list. Here, the first frequency band combination is the frequency band combination corresponding to the first frequency band, and the first frequency band is the frequency band corresponding to the first cell. Assume the terminal's DAPS capability information includes capability parameter set 1 at the frequency band combination level corresponding to frequency band combination 1, and capability parameter set 2 at the frequency band combination level corresponding to frequency band combination 2. Here, the index of capability parameter set 1 is 0, and the index of capability parameter set 2 is 1. If the first access network device selects capability parameter set 2 at the frequency band combination level corresponding to frequency band combination 2, then the first information includes the index of capability parameter set 2 (e.g., 1).

[0131] If the terminal's DAPS capability information only includes the capability parameter set of the band combination level corresponding to a band combination, then the first information may not include information indicating the capability parameter level of the band combination level, for example, it may not include information about the first band combination.

[0132] The second approach involves selecting a frequency band combination-level capability parameter set from multiple different frequency band-level capability parameter sets if the selected frequency band combination is matched by the first access network device. In this implementation, the first information includes information about the frequency band-level capability parameter set selected by the first access network device, enabling the second access network device to determine the selected frequency band-level capability parameter set.

[0133] For example, the first information includes information about the first frequency band. For instance, the first frequency band information could be an index of the first frequency band within the bandlist corresponding to the first frequency band combination. Assume that the DAPS capability information of the terminal includes a band-level capability parameter set 11 corresponding to band 1, and a band-level capability parameter set 12 corresponding to band 1. The index of capability parameter set 11 is 0, and the index of capability parameter set 12 is 1. If the first access network device selects capability parameter set 11, then the first information includes the index of capability parameter set 11 (e.g., 0).

[0134] If the first access network device selects a frequency band combination level capability parameter set that includes only one frequency band level capability parameter set, then the first information may not include information indicating the frequency band level capability parameter set, for example, it may not include information about the first frequency band.

[0135] Thirdly, if the frequency band-level capability parameter set selected by the first access network device includes multiple different capability parameter sets (featureSets), then the first access network device can select one featureSet from the multiple different featureSets. In this implementation, the first information includes information about the featureSet selected by the first access network device, so that the second access network device can determine the featureSet selected by the first access network device.

[0136] For example, the first information includes information about a first capability parameter set, where the first capability parameter set is a feature set corresponding to a first frequency band. For instance, the information about the first capability parameter set could be an index of the first capability parameter set, which could be the index of the feature set in a list of multiple feature sets corresponding to that frequency band. Assume the first access network device selects capability parameter set 11, which includes feature set 1 and feature set 2. The index of feature set 1 is 0, and the index of feature set 2 is 1. If the first access network device selects feature set 1 corresponding to capability parameter set 11, i.e., the first capability parameter set is feature set 1, then the first information includes the index of feature set 1 (e.g., 0).

[0137] If the frequency band-level capability parameter set selected by the first access network device includes only one feature set, then the first information may not include information indicating the feature set, for example, information indicating the first capability parameter set.

[0138] Fourthly, the featureSet (i.e., the first capability parameter set) selected by the first access network device includes uplink capability parameters and downlink capability parameters. If the uplink capability parameters include multiple sets of different carrier-level capability parameters, the first access network device can select one set of uplink capability parameters from these sets to configure the uplink carrier corresponding to the first cell. In this method, the first information includes the carrier-level capability parameters selected by the first access network device for uplink, so that the second access network device can determine which set of carrier-level capability parameters the first access network device has selected.

[0139] For example, the first information includes information about the capability parameters for the first cell, wherein the information about the capability parameters for the first cell may be the index of the capability parameters for the first cell in the first capability parameter set. Specifically, the index of the capability parameters for the first cell in the first capability parameter set includes the index of the uplink capability parameters for the first cell in the first capability parameter set and / or the index of the downlink capability parameters for the first cell in the first capability parameter set.

[0140] In one possible implementation, the featureSet1 in the capability parameter set 11 selected by the first access network device includes uplink capability parameters (featureSetuplink) and downlink capability parameters (featureSetdownlink). The featureSetuplink includes a set of capability parameters indicated by the "featureSeuplinkperCC1" field, with an index of 0. The featureSetuplink also includes a set of capability parameters indicated by the "featureSeuplinkperCC2" field, with an index of 1. Assuming the first access network device selects the set of capability parameters indicated by the "featureSeuplinkperCC1" field, the first information includes the index (e.g., 0) of the set of capability parameters indicated by the "featureSeuplinkperCC1" field.

[0141] In one possible implementation, featureSetuplinkperCC and featureSetdownlinkperCC are numbered sequentially, for example, see reference [link to relevant documentation]. Figure 3 The carrier indices 0 through 3 indicate featureSetdownlinkperCC1, featureSetdownlinkperCC2, featureSetuplinkperCC1, and featureSetuplinkperCC2, respectively. Alternatively, featureSetuplinkperCC and featureSetdownlinkperCC can be numbered independently. For example, the carrier indices of featureSetdownlinkperCC1 and featureSetdownlinkperCC2 are 0 and 1, respectively, and the carrier indices of featureSetuplinkperCC1 and featureSetuplinkperCC2 are 0 and 1, respectively.

[0142] Optionally, assuming the uplink and downlink capability parameters selected by the first access network device are bound, for example, the index of the set of capability parameters indicated by the "featureSetuplinkPerCC1" field and the index of the set of capability parameters indicated by the "featureSetuplinkPerCC1" field can be the same. For example, the first access network device selects a set of capability parameters indicated by the "featureSetuplinkPerCC1" field, and the first information includes the index (e.g., 0) of the set of capability parameters indicated by the "featureSetuplinkPerCC1" field, which also points to the set of capability parameters indicated by the "featureSetuplinkPerCC1" field.

[0143] Assuming the uplink and downlink capability parameters selected by the first access network device are not bound, for example, the indices of the set of capability parameters indicated by the "featureSetuplinkPerCC1" field and the set of capability parameters indicated by the "featureSetdownlinkPerCC1" field are different. For instance, the index of the set of capability parameters indicated by the "featureSetuplinkPerCC1" field is 0, the index of the set of capability parameters indicated by the "featureSetuplinkPerCC2" field is 1, the index of the set of capability parameters indicated by the "featureSetuplinkPerCC1" field is 2, and the index of the set of capability parameters indicated by the "featureSetdownlinkPerCC2" field is 3. If the first access network device selects the set of capability parameters indicated by the "featureSetuplinkPerCC1" field and the set of capability parameters indicated by the "featureSetdownlinkPerCC2" field, then the first information includes the index of the set of capability parameters indicated by the "featureSetuplinkPerCC1" field (e.g., 0) and the index of the set of capability parameters indicated by the "featureSetdownlinkPerCC2" field (e.g., 3).

[0144] 503. The second access network device receives the first information from the first access network device and determines the capability parameters for the second cell based on the first information.

[0145] In specific implementation, when the DAPS handover initiated by the first access network device is a same-frequency handover, meaning the first cell and the second cell correspond to the same frequency band, the second access network device can ensure that the capability parameters for the second cell and the capability parameters for the first cell correspond to the same feature set. For example, if the selection path for the capability parameters for the first cell is: capability parameter set 1 -> capability parameter set 11 -> featureSet1 -> (featureSetuplinkperCC1 + featureSetdownlinkperCC1), then the selection path for the capability parameters for the second cell is: capability parameter set 1 -> capability parameter set 11 -> featureSet1 -> (featureSetuplinkperCC2 + featureSetdownlinkperCC2).

[0146] In specific implementation, when the DAPS handover initiated by the first access network device is a same-frequency handover, meaning the first and second cells correspond to different frequency bands, the second access network device can use the same information (e.g., index) in the feature set corresponding to the capability parameters for the second cell and the feature set corresponding to the capability parameters for the first cell. For example, the selection path for the capability parameters for the first cell is: Capability Set 1 -> Capability Set 11 -> Feature Set 1 -> (featureSetuplinkperCC1 + featureSetdownlinkperCC1), where Capability Set 1 is the frequency band-level capability parameter set corresponding to Band 1. Therefore, the second access network device can select the capability parameters for the second cell from the feature Set 1 corresponding to Band 2. For example, the selection path for the capability parameters of the second cell is: capability parameter set 1 -> capability parameter set 21 -> featureSet1 -> (featureSetuplinkperCC2 + featureSetdownlinkperCC2), or, capability parameter set 1 -> capability parameter set 21 -> featureSet1 -> (featureSetuplinkperCC1 + featureSetdownlinkperCC1).

[0147] Corresponding to the first possible implementation of the first information mentioned above, if the first information includes information about a first frequency band combination, the second access network device can determine a frequency band combination from multiple frequency band combinations based on the information about the first frequency band combination. It can also determine the capability parameter set of the frequency band combination level corresponding to this frequency band combination, so as to determine the capability parameters selected by the first access network device when configuring the first cell. For example, the first information includes the index (e.g., 0) of the frequency band combination selected by the first access network device in the frequency band combination list. The second access network device can determine frequency band combination level 1 (BandCombination1) based on this index, and can also determine capability parameter set 1.

[0148] Corresponding to the second possible implementation of the first information mentioned above, if the first information includes information about the first frequency band, then the second access network device can determine the set of frequency band-level capability parameters selected by the first access network device when configuring the first cell from multiple set of frequency band-level capability parameters corresponding to the first frequency band combination, based on the information about the first frequency band. For example, the first information includes the index (e.g., 0) of the frequency band selected by the first access network device in the frequency band target, and the second access network device can determine the set of frequency band-level capability parameters 11 based on this index.

[0149] Corresponding to the third possible implementation of the first information mentioned above, if the first information includes information about the first capability parameter set, then the second access network device can determine the FeatureSet selected by the first access network device when configuring the first cell from multiple FeatureSets corresponding to the first frequency band based on the information of the first capability parameter set. For example, the first information includes the index of the FeatureSet selected by the first access network device (e.g., 0), indicating that the first access network device selected the uplink capability parameters and downlink capability parameters for the first cell from FeatureSet1 corresponding to capability parameter set 11.

[0150] In one possible implementation, the second access network device can determine the FeatureSet1 corresponding to the capability parameter set 11 based on the index. Further, the second access network device can select the uplink and downlink capability parameters for the second cell from the FeatureSet1 corresponding to the parameter set 11 (i.e., the frequency band-level capability parameter set corresponding to Band1).

[0151] Optionally, the second access network device can select uplink and downlink capability parameters for the second cell from FeatureSet1 corresponding to other frequency bands besides the first frequency band. For example, it can select uplink and downlink capability parameters for the second cell from FeatureSet1 corresponding to the frequency band-level capability parameter set 12 of Band2.

[0152] In one possible implementation, the first access network device can send first information to the second access network device via an inter-node RRC message. Specifically, the first access network device sends the first information to the second access network device via a handover request message. For example, the first information is carried within the handover request message.

[0153] Specifically, the handover request message includes a handover preparation information message, which includes the first information.

[0154] In one possible implementation, the first access network device can send first information to the second access network device via the core network. For example, the first access network device sends Handover Required via the NG interface, where Handover Required includes the first information.

[0155] The following combination Figure 6 This section introduces one possible implementation of the first information, where the black arrow indicates the selection path for the capability parameters of the source cell (the source cell for DAPS handover). Specifically, refer to... Figure 6 The first information includes the following fields:

[0156] 1. The first field indicates the frequency band combination selected by the source base station. For example, it could be the index of the BandCombination selected by the source base station in the BandCombinationList, see reference. Figure 6 The first field can be the index "0" of BandCombination1 in BandCombinationList.

[0157] 2. The second field indicates the set of frequency band-level capability parameters selected by the source base station in the frequency band-level capability parameter set corresponding to BandCombination1. For example, the second field could be the index selected by the source base station in BandEntry, see reference [reference needed]. Figure 6 The second field can be the index "1" of Band2 in BandEntry.

[0158] 3. The third field indicates the FeatureSet selected by the source base station from the multiple FeatureSets corresponding to BandCombination1. For example, the third field could be the Index of the FeatureSet corresponding to Band2 in the FeatureSetEntry. (See reference) Figure 6 The third field can be index "0" of FeatureSet1 corresponding to Band2.

[0159] 4. The fourth field indicates the downlink capability parameter selected by the source base station in FeatureSet1 corresponding to Band2. For example, the fourth field can be the index of the downlink capability parameter selected by the source base station in FeatureSet1 corresponding to Band2. For example, the source base station selects index "0" of "FeatureDownLinkPerCC1" in FeatureSet1 corresponding to Band2.

[0160] 5. The fifth field indicates the uplink capability parameter selected by the source base station in FeatureSet1 corresponding to Band2. For example, the fifth field can be the index of the uplink capability parameter selected by the source base station in FeatureSet1 corresponding to Band2. For example, the source base station selects index "2" of "FeatureUpLinkPerCC1" in FeatureSet1 corresponding to Band2.

[0161] It should be noted that the target base station and the source base station select the same FeatureSet index. Specifically, in the same frequency handover scenario, it can be the same FeatureSet corresponding to the same band; in the inter-frequency handover scenario, it can be FeatureSets with the same index corresponding to different bands.

[0162] When dividing each function into modules according to its corresponding function. Figure 7 A possible structural schematic diagram of the communication device involved in the above embodiments is shown. Figure 7 The communication device shown can be the first access network device or the second access network device described in the embodiments of this application, or it can be a component in the first access network device or the second access network device that implements the above method, or it can be a chip applied in the first access network device or the second access network device. The chip can be a system-on-a-chip (SOC) or a baseband chip with communication functions, etc. Figure 7 As shown, the communication device includes a processing unit 701 and a communication unit 702. The processing unit may be one or more processors, and the communication unit may be a transceiver or a communication interface.

[0163] The processing unit 701 can be used to support the communication device in performing the processing actions in the above method embodiments. For example, it can be used to support the first access network device in performing step 501, support the second access network device in performing step 503, and / or other processes used in the technology described herein.

[0164] The communication unit 702 is used to support communication between the communication device and other devices (or apparatuses), for example, to support the first access network device to execute step 502 and send first information to the second access network device; to support the second access network device to execute the corresponding receiving process triggered by step 502 and receive the first information from the first access network device, and / or other processes used in the technology described herein.

[0165] It should be noted that all relevant content of each step involved in the above method embodiments can be referenced from the functional description of the corresponding functional module, and will not be repeated here.

[0166] like Figure 8 As shown, the communication device may further include a storage unit 703, which is used to store the program code and / or data of the communication device.

[0167] The processing unit 701 may include at least one processor, the communication unit 702 may be a transceiver or a communication interface, and the storage unit 703 may include a memory.

[0168] It should be noted that in the above embodiments of communication devices, each unit may also be referred to as a module, component, or circuit, etc.

[0169] This application provides a computer-readable storage medium storing instructions; the instructions are used to perform actions such as... Figure 5 The method shown.

[0170] This application provides a computer program product including instructions that, when run on a communication device, cause the communication device to perform actions such as... Figure 5 The method shown.

[0171] This application provides a wireless communication device, comprising: a wireless communication device storing instructions; and a method for the wireless communication device to... Figure 4a , Figure 4b , Figures 7-8 When the communication device shown is run, it causes the communication device to perform the following actions: Figure 5 The method shown. The wireless communication device can be a chip.

[0172] Through the above description of the implementation methods, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In practical applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the communication device can be divided into different functional modules to complete all or part of the functions described above.

[0173] The processor in this application embodiment may include, but is not limited to, at least one of the following: a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), a microcontroller unit (MCU), or an artificial intelligence processor, etc., which are various computing devices that run software. Each computing device may include one or more cores for executing software instructions to perform calculations or processing. The processor may be a separate semiconductor chip or integrated with other circuits into a single semiconductor chip. For example, it may be integrated with other circuits (such as encoding / decoding circuits, hardware acceleration circuits, or various bus and interface circuits) to form a SoC (System-on-a-Chip), or it may be integrated as a built-in processor within an ASIC. The ASIC with the integrated processor may be packaged separately or packaged together with other circuits. In addition to the cores for executing software instructions to perform calculations or processing, the processor may further include necessary hardware accelerators, such as field-programmable gate arrays (FPGAs), PLDs (programmable logic devices), or logic circuits that implement dedicated logic operations.

[0174] The memory in the embodiments of this application may include at least one of the following types: read-only memory (ROM) or other types of static storage devices capable of storing static information and instructions; random access memory (RAM) or other types of dynamic storage devices capable of storing information and instructions; or electrically erasable programmable-only memory (EEPROM). In some scenarios, the memory may also be a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0175] In this application, "at least one" refers to one or more. "More than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, or B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple. In addition, to facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first" and "second" are used in the embodiments of this application to distinguish the same or similar items with essentially the same function and effect. Those skilled in the art will understand that the words "first" and "second" do not limit the quantity or the order of execution, and that the words "first" and "second" do not necessarily imply that they are different.

[0176] In the several embodiments provided in this application, it should be understood that the disclosed database access apparatus and method can be implemented in other ways. For example, the database access apparatus embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces; the indirect coupling or communication connection of the database access apparatus or unit may be electrical, mechanical, or other forms.

[0177] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0178] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0179] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, essentially or in other words, the parts that contribute to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0180] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A parameter indication method, characterized in that, include: The first access network device determines the capability parameters for the first cell from the dual active protocol stack (DAPS) capability parameters supported by the terminal. The first cell is the source cell for the terminal to perform DAPS handover, and the first access network device is the access network device corresponding to the first cell. The first access network device sends first information to the second access network device. The first information is used to indicate the capability parameters for the first cell. The second access network device is the access network device corresponding to the target cell for the terminal's DAPS handover. The first information includes the uplink capability parameters and / or downlink capability parameters for the first cell selected by the first access network device. The uplink capability parameters for the first cell are the carrier indexes of the uplink capability parameters for the first cell in the uplink capability parameters corresponding to the first capability parameter set, and the downlink capability parameters for the first cell are the carrier indexes of the downlink capability parameters for the first cell in the downlink capability parameters corresponding to the first capability parameter set.

2. The method according to claim 1, characterized in that, The first capability parameter set is the capability parameter set of the first frequency band, and the first frequency band is the frequency band corresponding to the first cell.

3. The method according to claim 1 or 2, characterized in that, The first information is carried in the handover request message.

4. The method according to claim 3, characterized in that, The first information is carried in the handover request message, including: The handover request message includes handover preparation information, which includes the first information.

5. A parameter indication method, characterized in that, include: The second access network device receives first information from the first access network device. The first information is used to indicate capability parameters for the first cell. The first cell is the source cell for the terminal to perform dual active protocol stack (DAPS) handover. The first access network device is the access network device corresponding to the first cell. The first information includes uplink capability parameters and / or downlink capability parameters for the first cell selected by the first access network device. The second access network device determines capability parameters for the second cell based on the first information. The capability parameters for the second cell belong to the same capability parameter set as the capability parameters for the first cell, or the information of the capability parameter set corresponding to the capability parameters for the second cell is the same as the information of the capability parameter set corresponding to the capability parameters for the second cell. The second access network device is the access network device corresponding to the second cell. The uplink capability parameter for the first cell is the carrier index of the uplink capability parameter for the first cell in the uplink capability parameters corresponding to the first capability parameter set, and the downlink capability parameter for the first cell is the carrier index of the downlink capability parameter for the first cell in the downlink capability parameters corresponding to the first capability parameter set.

6. The method according to claim 5, characterized in that, The first capability parameter set is the capability parameter set of the first frequency band, and the first frequency band is the frequency band corresponding to the first cell.

7. The method according to claim 5 or 6, characterized in that, The first information is carried in the handover request message.

8. The method according to claim 7, characterized in that, The first information is carried in the handover request message, including: The handover request message includes handover preparation information, which includes the first information.

9. A communication device, wherein the communication device is a first access network device, characterized in that, include: The processing unit is configured to determine the capability parameters for the first cell from the dual active protocol stack (DAPS) capability parameters supported by the terminal, wherein the first cell is the source cell for the terminal to perform DAPS handover, and the first access network device is the access network device corresponding to the first cell. A communication unit is configured to send first information to a second access network device, the first information indicating the capability parameters for the first cell, wherein the second access network device is the access network device corresponding to the target cell for the terminal's DAPS handover; the first information includes uplink capability parameters and / or downlink capability parameters for the first cell selected by the first access network device; the uplink capability parameters for the first cell are carrier indices of the uplink capability parameters for the first cell in the uplink capability parameters corresponding to the first capability parameter set, and the downlink capability parameters for the first cell are carrier indices of the downlink capability parameters for the first cell in the downlink capability parameters corresponding to the first capability parameter set.

10. The apparatus according to claim 9, characterized in that, The first capability parameter set is the capability parameter set of the first frequency band, and the first frequency band is the frequency band corresponding to the first cell.

11. The apparatus according to claim 9 or 10, characterized in that, The first information is carried in the handover request message.

12. The apparatus according to claim 11, characterized in that, The first information is carried in the handover request message, including: The handover request message includes handover preparation information, which includes the first information.

13. A communication device, wherein the communication device is a second access network device, characterized in that, include: A communication unit is configured to receive first information from a first access network device. The first information is used to indicate capability parameters for a first cell, where the first cell is the source cell for the terminal to perform dual active protocol stack (DAPS) handover, and the first access network device is the access network device corresponding to the first cell. The first information includes uplink capability parameters and / or downlink capability parameters for the first cell selected by the first access network device. The processing unit is configured to determine capability parameters for a second cell based on the first information, wherein the capability parameters for the second cell belong to the same capability parameter set as the capability parameters for the first cell, or the information of the capability parameter set corresponding to the capability parameters for the second cell is the same as the information of the capability parameter set corresponding to the capability parameters for the second cell, and the second access network device is the access network device corresponding to the second cell; the uplink capability parameter for the first cell is the carrier index of the uplink capability parameter for the first cell in the uplink capability parameters corresponding to the first capability parameter set, and the downlink capability parameter for the first cell is the carrier index of the downlink capability parameter for the first cell in the downlink capability parameters corresponding to the first capability parameter set.

14. The apparatus according to claim 13, characterized in that, The first capability parameter set is the capability parameter set of the first frequency band, and the first frequency band is the frequency band corresponding to the first cell.

15. The apparatus according to claim 13 or 14, characterized in that, The first information is carried in the handover request message.

16. The apparatus according to claim 15, characterized in that, The first information is carried in the handover request message, including: The handover request message includes handover preparation information, which includes the first information.

17. A communication device, characterized in that, Includes a processor, which is coupled to a memory; Memory, used to store computer programs; A processor for executing a computer program stored in the memory, such that the apparatus performs the method as claimed in any one of claims 1 to 4 or the method as claimed in any one of claims 5 to 8.

18. A computer-readable storage medium, characterized in that, Includes a program or instructions that, when executed by a processor, execute the method as described in any one of claims 1 to 4 or the method as described in any one of claims 5 to 8.

19. A computer program product, characterized in that, The computer program product includes instructions that, when executed, cause the method as described in any one of claims 1 to 4 to be performed, or cause the method as described in any one of claims 5 to 8 to be performed.

20. A chip, characterized in that, The chip includes a processor and an interface circuit, the interface circuit being coupled to the processor, the processor being configured to run a computer program or instructions that cause the method described in any one of claims 1 to 4 to be executed, or cause the method described in any one of claims 5 to 8 to be executed.

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