Handover configuration method, system, base station and storage medium

Abstract

The disclosure provides a handover configuration method, system, base station and storage medium, and relates to the technical field of wireless communication. The method comprises the following steps: in the case that a source base station determines to simultaneously configure a CHO and a DAPS HO mode for a terminal, the source base station sends a handover request message to each candidate base station, wherein the handover request message comprises first configuration information of DRBs configured in the CHO and the DAPS HO mode; the source base station receives a handover request response message sent by each candidate base station, wherein the handover request response message comprises second configuration information indicating that the CHO and the DAPS HO mode are accepted; and the source base station sends a radio resource control reconfiguration message to the terminal, so that the terminal selects a target base station from the candidate base stations for handover, wherein the radio resource control reconfiguration message comprises third configuration information of the DRBs configured in the CHO and the DAPS HO mode. The disclosure meets the demand of high reliability and zero-millisecond latency of the terminal handover, and improves the service experience of users in a mobility scenario.

Description

Technical Field

[0001] This disclosure relates to the field of wireless communication technology, and in particular to a switching configuration method, system, base station, and storage medium. Background Technology

[0002] With the application of higher frequency spectrum in wireless networks, such as high-frequency millimeter waves or ultra-dense networking scenarios, the coverage area of ​​base stations is becoming smaller, and users will experience more frequent handovers in these scenarios. At the same time, with the evolution of wireless network technology, users' demands for mobile communication services are also increasing. In addition to traditional voice and internet data services, many services with various QoS (Quality of Service) requirements have emerged. For example, remote control, industrial automation, AR (Augmented Reality), and VR (Virtual Reality) require ultra-high reliability and ultra-low latency. For such services, mobility performance should be guaranteed as much as possible, including enhanced reliability and reduced downtime.

[0003] In the standardization work of 3GPP R16, the 3GPP RAN2 and RAN3 working groups have studied the issue of mobility enhancement in NR (New Radio) networks and designed and supported two handover methods: CHO (Conditional Handover) and DAPS HO (Dual Active Protocol Stack Handover).

[0004] In the CHO (Confirmation of Handover) mode, after receiving the CHO configuration, the terminal begins to evaluate the execution conditions. When the terminal determines that one or more conditions for handover execution are met, it directly triggers the handover execution phase and initiates random access to the target base station. This approach improves the reliability of the handover process.

[0005] In DAPS HO mode, the user maintains a connection with the source base station while synchronizing with the target base station, and disconnects from the source base station only after successfully connecting to the target base station. This method achieves zero-millisecond latency during handover.

[0006] The two handover methods mentioned above are written into the 3GPP Release 16 specification. However, the Release 16 specification only supports configuring CHO or DAPS HO individually, and does not support configuring both handover methods simultaneously for a terminal. Furthermore, CHO is a per-UE level configuration, while DAPS HO is a per-DRB (Data Radio Bearer) level configuration, and their signaling configurations differ. In the current RRC (Radio Resource Control) signaling, DAPS HO-related configurations are carried using the radioBearerConfig information element, which specifies which DRBs are currently using the DAPS HO method. CHO configurations, on the other hand, are carried using the conditionalReconfiguration-r16 information element, specifying that the CHO method is used for the current terminal. These two information elements are independent in the RRCReconfiguration signaling; therefore, a single RRC configuration cannot specify which DRBs for each candidate base station are configured with CHO+DAPS.

[0007] If a CHO is configured on the terminal first, and then a DAPS HO is configured, the synchronization process with the target base station is directly triggered by the terminal under the CHO. Before the terminal successfully accesses the target base station, the source base station cannot know the target base station ID. Therefore, it is not possible to configure a DAPS HO for the target base station after configuring the CHO. In other words, it is not possible to configure the terminal using a single RRC signaling method of CHO+DAPS HO.

[0008] As mentioned above, for ultra-dense networking or high-frequency millimeter wave scenarios, it is necessary to ensure high reliability and zero millisecond latency for users during mobility, which means that both CHO and DAPS HO configurations need to be supported simultaneously. However, when both handover methods exist at the same time, the 3GPP RAN working group has not provided a reasonable configuration method and signaling process. Therefore, it is necessary to design a signaling structure and signaling transmission method with high reliability and zero millisecond latency handover. Summary of the Invention

[0009] One technical problem this disclosure aims to solve is to provide a handover configuration method, system, base station, and storage medium that can meet users' needs for highly reliable handover with zero millisecond latency.

[0010] According to one aspect of this disclosure, a handover configuration method is proposed, comprising: when it is determined that a terminal is simultaneously configured with Conditional Handover (CHO) and Dual Activation Protocol Stack (DAPS HO) modes, sending a handover request message to each candidate base station, wherein the handover request message includes first configuration information of the Data Radio Bearer (DRB) configuring the CHO and DAPS HO modes; receiving a handover request response message sent by each candidate base station, wherein the handover request response message includes second configuration information indicating acceptance of the CHO and DAPS HO modes; and sending a Radio Resource Control (RRC) reconfiguration message to the terminal so that the terminal can select a target base station among the candidate base stations for handover, wherein the RRC reconfiguration message includes third configuration information of the DRB configured with the CHO and DAPS HO modes.

[0011] In some embodiments, after receiving a handover success message from the target base station, the connection with the terminal is disconnected.

[0012] In some embodiments, a handover request message is sent to each candidate base station via a handover request signaling, wherein the relevant information element of the handover request signaling contains relevant indication information of CHO and DAPS HO, which is used to indicate the configuration of CHO and DAPS HO methods for one or more DRBs.

[0013] In some embodiments, a handover request confirmation message sent by each candidate base station is received via a handover request confirmation signaling message, wherein the relevant information element of the handover request confirmation signaling message contains indication information on whether to accept CHO and DAPS HO modes.

[0014] In some embodiments, a radio resource control reconfiguration message is sent to the terminal via radio resource control reconfiguration signaling, wherein the relevant information element of the radio resource control reconfiguration signaling contains relevant indication information of CHO and DAPS HO, which is used to indicate that one or more DRBs are configured with CHO and DAPS HO modes.

[0015] In some embodiments, the conditional handover information element of the handover request signaling includes a first DRB list element, which includes a DRB identifier and DAPS request information.

[0016] In some embodiments, the DRB mapping of the handover request signaling to the list cells of the quality of service flow includes a DAPS request information cell, which carries CHO-related information.

[0017] In some embodiments, the conditional handover information element of the handover request confirmation signaling includes a second DRB list element, which includes a DRB identifier and DAPS response information.

[0018] In some embodiments, the DAPS response information element of the switch request confirmation signaling includes CHO-related information.

[0019] In some embodiments, the conditional reconfiguration add list information element of the Radio Resource Control (DRC) reconfiguration signaling includes DAPS configuration-related information and DRB add list information, wherein the DRB add list information includes the identifier of the DRB that accepts the DAPS HO method.

[0020] In some embodiments, the DRB add-list information element of the radio bearer configuration information in the radio resource control reconfiguration signaling includes DAPS-related configuration information elements, and the DAPS-related configuration information elements include conditional handover-related information.

[0021] In some embodiments, after receiving the handover request response signaling sent by each candidate base station, the data to be transmitted and the corresponding sequence number (SN) state transition signaling are sent to each candidate base station.

[0022] According to another aspect of this disclosure, a base station is also provided, comprising: a request sending unit configured to send a handover request message to each candidate base station when it is determined that a terminal is simultaneously configured with Conditional Handover (CHO) and Dual Activation Protocol Stack (DAPS HO) handover, wherein the handover request message includes first configuration information of the Data Radio Bearer (DRB) configuring the CHO and DAPS HO modes; a response receiving unit configured to receive a handover request response message sent by each candidate base station, wherein the handover request response message includes second configuration information indicating acceptance of the CHO and DAPS HO configuration; and an information sending unit configured to send a Radio Resource Control (RRC) reconfiguration message to the terminal so that the terminal selects a target base station for handover among the candidate base stations, wherein the RRC reconfiguration message includes third configuration information of the DRB configured with the CHO and DAPS HO modes.

[0023] In some embodiments, the base station further includes a terminal handover unit configured to disconnect from the terminal after receiving a successful terminal handover message sent by the target base station.

[0024] According to another aspect of this disclosure, a base station is also provided, comprising: a memory; and a processor coupled to the memory, the processor being configured to execute the handover configuration method as described above based on instructions stored in the memory.

[0025] According to another aspect of this disclosure, a handover configuration system is also provided, comprising: a first base station, the first base station being the base station described above; and a second base station, which, when serving as a candidate base station, is configured to send a handover request response message to the first base station, wherein the handover request response message includes second configuration information indicating acceptance of the CHO and DAPS HO configuration methods.

[0026] In some embodiments, the handover configuration system further includes: a terminal configured to receive a radio resource control reconfiguration message sent by a first base station, and select a target base station from candidate base stations for handover according to the radio resource control reconfiguration message, wherein the radio resource control reconfiguration message includes third configuration information of DRB configured with CHO and DAPS HO modes.

[0027] According to another aspect of this disclosure, a non-transitory computer-readable storage medium is also provided, on which computer program instructions are stored, which, when executed by a processor, implement the switching configuration method as described above.

[0028] In this embodiment of the disclosure, the source base station sends relevant indication information including CHO and DAPS HO to each candidate base station to indicate the configuration of CHO and DAPS HO for one or more DRBs. After the candidate base station decides whether to accept the request, it sends feedback to the source base station. The source base station then sends the relevant configuration information to the terminal, thereby enabling the terminal to perform highly reliable and zero-millisecond latency handover during movement, improving the user's service experience in mobility scenarios.

[0029] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0030] The accompanying drawings, which form part of this specification, illustrate embodiments of this disclosure and, together with the specification, serve to explain the principles of this disclosure.

[0031] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0032] Figure 1 This is a flowchart illustrating some embodiments of the switching configuration method disclosed herein.

[0033] Figure 2 This is a flowchart illustrating some other embodiments of the switching configuration method disclosed herein.

[0034] Figure 3 This is a flowchart illustrating some other embodiments of the switching configuration method disclosed herein.

[0035] Figure 4 This is a schematic diagram of the structure of some embodiments of the base station disclosed herein.

[0036] Figure 5 The diagram shows the structure of some other embodiments of the base station disclosed herein.

[0037] Figure 6 The diagram shows the structure of some other embodiments of the base station disclosed herein. Detailed Implementation

[0038] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0039] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0040] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0041] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0042] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0043] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0044] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0045] Figure 1 This is a flowchart illustrating some embodiments of the handover configuration method disclosed herein. This embodiment is performed by the source base station.

[0046] In step 110, if it is determined that the terminal is configured with both CHO and DAPS HO modes, a handover request message is sent to each candidate base station, wherein the handover request message includes the first configuration information of the DRB configured with both CHO and DAPS HO modes.

[0047] In some embodiments, during the user handover process, when the source base station decides to use a highly reliable and zero-millisecond latency handover method based on the user's service requirements, it sends a corresponding handover request signaling to the candidate base station. The relevant information elements in this handover request signaling contain indication information related to CHO and DAPS HO, used to indicate that CHO and DAPS HO methods are configured for one or more DRBs.

[0048] In step 120, a handover request response message sent by each candidate base station is received, wherein the handover request response message includes second configuration information indicating acceptance of the CHO and DAPS HO configuration methods.

[0049] In some embodiments, the candidate base station decides whether to accept the request and send a response to the source base station based on its own resource availability.

[0050] In some embodiments, the candidate base station sends a handover request confirmation signaling to the source base station. The relevant information elements of the handover request confirmation signaling include indication information on whether to accept the CHO and DAPS HO methods.

[0051] In some embodiments, after receiving the handover request response signaling sent by each candidate base station, the source base station sends the data to be transmitted and the corresponding SN (sequence number) state transition signaling to each candidate base station.

[0052] In step 130, a radio resource control reconfiguration message is sent to the terminal so that the terminal can select a target base station from the candidate base stations for handover. The radio resource control reconfiguration message includes third configuration information of the DRB configured with CHO and DAPS HO modes.

[0053] In some embodiments, the source base station sends a radio resource control reconfiguration message to the terminal via radio resource control reconfiguration signaling. The relevant information elements of the radio resource control reconfiguration signaling include relevant indication information of CHO and DAPS HO, which are used to indicate that one or more DRBs are configured with CHO and DAPS HO modes.

[0054] In some embodiments, after receiving relevant signaling, the terminal continues to monitor the conditions for triggering handover. When the conditions are met, it initiates random access to the target base station while maintaining the connection with the source base station. When the terminal successfully accesses the target base station, the target base station informs the source base station that the terminal has successfully accessed the target base station. At this time, the source base station disconnects the connection with the terminal.

[0055] In the above embodiments, the source base station sends relevant indication information including CHO and DAPS HO to each candidate base station to indicate the configuration of CHO and DAPS HO for one or more DRBs. After the candidate base station decides whether to accept the request, it sends feedback to the source base station. The source base station sends the relevant configuration information to the terminal, thereby enabling the terminal to perform highly reliable and zero-millisecond latency handover during movement, improving the user's service experience in mobility scenarios.

[0056] Figure 2 This is a flowchart illustrating some other embodiments of the switching configuration method disclosed herein.

[0057] In step 210, the source base station sends a handover request signaling to each candidate base station.

[0058] In this step, the source base station informs the candidate base station via handover request signaling that the current request is a highly reliable handover with zero millisecond latency, that is, both CHO and DAPS HO are configured. The signaling structure specifies that CHO is configured for the current terminal and which DRBs are configured with DAPS HO. For DRBs not configured with DAPS HO, conditional handover is used by default.

[0059] In some embodiments, the conditional handover information element of the handover request signaling includes a first DRB list element, which includes a DRB identifier and DAPS request information. For example, referring to 3GPP protocol TS38.423, a DRB list element is added to the Conditional Handover Information element in the Xn interface signaling Handover Request. The DRB list element contains a DRB ID and DAPS Request Information, which are used to indicate which DRBs of the current terminal are configured with DAPS HO mode.

[0060] The handover request signaling structure is as follows:

[0061] Handover Request

[0062] >>Conditional Handover Information

[0063] >>>DRB list

[0064] >>>>DRB ID

[0065] >>>>DAPS Request Information

[0066] In some embodiments, the DRB to QoS Flow Mapping List (DRB to QoS Flow) information element of the handover request signaling includes a DAPS request information element, which carries CHO-related information.

[0067] The handover request signaling structure is as follows:

[0068] Handover Request

[0069] >>DRB to QoS Flow Mapping List

[0070] >>>DAPS Request Information

[0071] >>>>CHO information

[0072] In step 220, each candidate base station sends a handover request confirmation signaling message back to the source base station.

[0073] In some embodiments, the Conditional Handover Information element of the Handover Request Acknowledge signaling includes a second DRB list element, which includes DRB identifiers and DAPS response information. For example, referring to 3GPP protocol TS38.423, a new DRB list element is added to the Conditional Handover Information element in the Xn signaling Handover Request Acknowledge signaling. The DRB list element contains DRB IDs and DAPS Response Information, which indicate which DRB requests were accepted.

[0074] The handover request acknowledge signaling structure is as follows:

[0075] Handover Request Acknowledge

[0076] >>Conditional Handover Information

[0077] >>>DRB list

[0078] >>>>DRB ID

[0079] >>>>DAPS Response Information

[0080] In some embodiments, the DAPS response information element of the switch request confirmation signaling includes CHO-related information.

[0081] The handover request acknowledge signaling structure is as follows:

[0082] Handover Request Acknowledge

[0083] >>DAPS Response Information

[0084] >>>CHO information

[0085] In step 230, the source base station sends a radio resource control reconfiguration signaling to the terminal.

[0086] In some embodiments, after receiving feedback from the candidate base station, the source base station sends a highly reliable configuration with zero millisecond latency to the terminal via RRCReconfiguration signaling. The CondReconfigToAddModList (conditional reconfiguration add list) element of the RRCReconfiguration signaling includes DAPS configuration information and DRB add list information. The DRB add list information includes the identifier of the DRB accepting the DAPS HO method. For example, referring to 3GPP protocol TS38.331, a daps-Config element and a DRB-ToAddModList element are added to the CondReconfigToAddModList element within the ConditionalReconfiguration element in the current RRCReconfiguration signaling. The DRB-ToAddModList element contains the DRB ID, where the DRB ID is the DRB ID for each candidate base station accepting the DAPS request. This signaling design indicates which DRBs for each candidate base station are configured with both CHO and DAPS HO methods simultaneously.

[0087] The RRCReconfiguration signaling structure is as follows:

[0088] >RRCReconfiguration

[0089] >>ConditionalReconfiguration

[0090] >>>CondReconfigToAddModList

[0091] >>>>daps-Config

[0092] >>>>DRB-ToAddModList

[0093] >>>>>DRB ID

[0094] In some embodiments, the DRB-ToAddMod (DRB Add List) information element of the RadioBearerConfig (Radio Bearer Configuration Information) of the RRCReconfiguration signaling includes DAPS-related configuration information elements, and the DAPS-related configuration information elements include conditional switching information.

[0095] The RRCReconfiguration signaling structure is as follows:

[0096] >RRCReconfiguration

[0097] >>RadioBearerConfig

[0098] >>>DRB-ToAddMod

[0099] >>>>daps-Config

[0100] >>>>>Conditional Config

[0101] In step 240, the terminal monitors the surrounding candidate base stations. When a candidate base station meets the high threshold, it switches to the target base station while maintaining the connection with the source base station during the switching process.

[0102] In step 250, after the source base station receives the handover success message sent by the target base station, it disconnects from the terminal.

[0103] In the above embodiments, the existing protocol is enhanced to enable the network to configure the terminal with CHO+DAPS HO mode through a single RRC signaling, which meets the user's need for high reliability and zero millisecond latency handover and improves the user's service experience in mobility scenarios.

[0104] The present disclosure will now be described using a specific embodiment as an example. Figure 3 This is a flowchart illustrating some other embodiments of the handover configuration method disclosed herein. This embodiment describes the data transmission method when there are two candidate base stations; in practical application scenarios, there may be two or more candidate base stations.

[0105] In step 310, the source base station sends a measurement control message to the terminal.

[0106] In step 320, the terminal sends a measurement report to the source base station.

[0107] In step 330, the source base station handover decision is made.

[0108] In step 340, the source base station sends a Handover Request signaling to candidate base station 1 and candidate base station 2. The relevant information elements of the signaling contain relevant indication information of CHO and DAPS HO, which are used to indicate the configuration of CHO and DAPS HO for one or more DRBs.

[0109] The source base station decides whether to configure both CHO and DAPS handover modes (i.e., high-reliability zero-millisecond latency handover) for the terminal based on the user's service requirements, and sends the relevant configuration request to the candidate base station through Handover Request signaling.

[0110] In step 350, candidate base station 1 and candidate base station 2 respectively send a Handover Request Ack signaling to the source base station. The relevant information elements of the signaling contain indication information on whether to accept CHO and DAPS HO modes.

[0111] Candidate base stations decide whether to accept the request based on their own resource status and send back Handover RequestAcknowledge signaling.

[0112] In step 360, the source base station sends Radio Resource Control Reconfiguration (RRCReconfiguration) signaling to the terminal. The relevant information elements of this signaling contain relevant indication information of CHO and DAPS HO, which are used to indicate that one or more DRBs are configured with CHO and DAPS HO modes.

[0113] In step 370, the terminal sends a Radio Resource Control Reconfiguration Complete message (RRCReconfigurationComplete) to the source base station, indicating that the handover configuration has been successfully received.

[0114] In step 380, the source base station sends an Early Status Transfer signaling message to candidate base station 1 and candidate base station 2, and forwards data. At this time, the source base station continues to maintain the connection with the terminal and maintains the data transmission process with the terminal.

[0115] In step 390, the terminal measures and evaluates the handover execution conditions. If a candidate base station meets the handover execution conditions, the handover execution process is triggered.

[0116] After receiving the configuration information from the source base station, the UE begins to evaluate candidate base stations. When a candidate base station meets the handover execution conditions, the terminal directly triggers the handover process and synchronizes with the selected target base station.

[0117] In step 3100, the terminal sends synchronization and random access signaling to candidate base station 1.

[0118] In step 3110, candidate base station 1 reports a successful handover to the source base station (HO Success).

[0119] In step 3120, the source base station sends a sequence number status transfer signaling (SN StatusTransfer) to candidate base station 1.

[0120] In step 3130, the source base station disconnects from the terminal (release connect).

[0121] In the above embodiments, the new signaling configuration method can effectively improve the reliability of users in the handover process and ensure zero millisecond interruption latency during the handover process.

[0122] Figure 4 This is a schematic diagram of the structure of some embodiments of the base station disclosed herein. The base station, serving as a source base station, includes: a request sending unit 410, a response receiving unit 420, and an information sending unit 430.

[0123] The request sending unit 410 is configured to send a handover request message to each candidate base station when it is determined that the terminal is configured with both CHO and DAPS HO modes. The handover request message includes the first configuration information of the DRB configured with both CHO and DAPS HO modes.

[0124] In some embodiments, the request sending unit 410 sends a handover request message to each candidate base station through handover request signaling, wherein the relevant information element of the handover request signaling contains relevant indication information of CHO and DAPS HO, which is used to indicate the configuration of CHO and DAPS HO mode for one or more DRBs.

[0125] In some embodiments, the conditional handover information element of the handover request signaling includes a first DRB list element, which includes a DRB identifier and DAPS request information.

[0126] In some embodiments, the DRB mapping of the handover request signaling to the list cells of the quality of service flow includes a DAPS request information cell, which carries CHO-related information.

[0127] The response receiving unit 420 is configured to receive a handover request response message sent by each candidate base station, wherein the handover request response message includes second configuration information indicating acceptance of the CHO and DAPS HO modes.

[0128] In some embodiments, the response receiving unit 420 receives a handover request confirmation message sent by each candidate base station through a handover request confirmation signaling, wherein the relevant information element of the handover request confirmation signaling contains indication information on whether to accept CHO and DAPSHO methods.

[0129] In some embodiments, the conditional handover information element of the handover request confirmation signaling includes a second DRB list element, which includes a DRB identifier and DAPS response information.

[0130] In some embodiments, the DAPS response information element of the switch request confirmation signaling includes CHO-related information.

[0131] The information sending unit 430 is configured to send a radio resource control reconfiguration message to the terminal so that the terminal can select a target base station for handover among candidate base stations. The radio resource control reconfiguration message includes third configuration information of the DRB configured with CHO and DAPSHO modes.

[0132] In some embodiments, the information sending unit 430 is further configured to send the data to be transmitted and the corresponding SN state transition signaling to each candidate base station after receiving the handover request response signaling sent by each candidate base station.

[0133] In some embodiments, the information sending unit 430 sends a radio resource control reconfiguration message to the terminal via radio resource control reconfiguration signaling, wherein the relevant information element of the radio resource control reconfiguration signaling contains relevant indication information of CHO and DAPS HO, which is used to indicate that one or more DRBs are configured with CHO and DAPS HO modes.

[0134] In some embodiments, the conditional reconfiguration add list information element of the Radio Resource Control (DRC) reconfiguration signaling includes DAPS configuration-related information and DRB add list information, wherein the DRB add list information includes the identifier of the DRB that accepts the DAPS HO method.

[0135] In some embodiments, the DRB add-list information element of the radio bearer configuration information in the radio resource control reconfiguration signaling includes DAPS-related configuration information elements, and the DAPS-related configuration information elements include conditional handover-related information.

[0136] In the above embodiments, the source base station sends relevant indication information including CHO and DAPS HO to each candidate base station to indicate the configuration of CHO and DAPS HO for one or more DRBs. After the candidate base station decides whether to accept the request, it sends feedback to the source base station. The source base station sends the relevant configuration information to the terminal, thereby enabling the terminal to perform highly reliable and zero-millisecond latency handover during movement, improving the user's service experience in mobility scenarios.

[0137] In other embodiments of this disclosure, such as Figure 5 As shown, the base station also includes a terminal handover unit 510, which is configured to disconnect from the terminal after receiving a successful terminal handover message sent by the target base station.

[0138] Figure 6 This is a schematic diagram illustrating the structure of some other embodiments of the base station disclosed herein. The base station 600 includes a memory 610 and a processor 620. The memory 610 can be a disk, flash memory, or any other non-volatile storage medium. The memory 610 is used to store... Figure 1-3 The instructions in the corresponding embodiment. Processor 620 is coupled to memory 610 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. Processor 620 is used to execute instructions stored in memory.

[0139] In some embodiments, the processor 620 is coupled to the memory 610 via a BUS bus 630. The base station 600 can also be connected to an external storage system 650 via a storage interface 640 to access external data, and can also be connected to a network or another computer system (not shown) via a network interface 660. Further details are omitted here.

[0140] In this embodiment, by storing data instructions in a memory and then processing the instructions by a processor, the user's need for highly reliable and zero-millisecond-latency switching can be met.

[0141] In other embodiments of this disclosure, a handover configuration system is protected, comprising a first base station and a second base station. The first base station is the base station described in the above embodiments, i.e., the source base station. When the second base station is a candidate base station, it is configured to send a handover request response message to the first base station. The handover request response message includes second configuration information indicating acceptance of the CHO and DAPS HO configuration methods.

[0142] In other embodiments, the handover configuration system further includes a terminal configured to receive a radio resource control reconfiguration message sent by the first base station, and select a target base station from candidate base stations for handover according to the radio resource control reconfiguration message, wherein the radio resource control reconfiguration message includes third configuration information of the DRB configured with CHO and DAPS HO modes.

[0143] In other embodiments, a non-transitory computer-readable storage medium stores computer program instructions that are implemented when executed by a processor. Figure 1-3The steps of the method in the corresponding embodiments are described. Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, apparatus, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0144] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0145] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0146] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0147] This concludes the detailed description of the present disclosure. To avoid obscuring the concept of the disclosure, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solutions disclosed herein based on the above description.

[0148] While specific embodiments of this disclosure have been described in detail by way of example, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A method for switching configurations, comprising: When it is determined that the terminal is configured with both Conditional Handover (CHO) and Dual Activation Protocol Stack (DAPS) Handover (HO) modes, a handover request message is sent to each candidate base station via handover request signaling. The relevant information elements of the handover request signaling contain relevant indication information of CHO and DAPS HO, which are used to indicate that CHO and DAPS HO modes are configured for one or more Data Radio Bearers (DRBs). The handover request message includes the first configuration information of the DRB configured with CHO and DAPS HO modes. The system receives a handover request response message from each candidate base station via a handover request confirmation signaling message. The relevant information elements in the handover request confirmation signaling message contain indications of whether to accept CHO and DAPS HO configurations. The handover request response message includes second configuration information indicating acceptance of CHO and DAPS HO configurations. A radio resource control reconfiguration message is sent to the terminal so that the terminal can select a target base station from the candidate base stations for handover. The radio resource control reconfiguration message includes third configuration information of the DRB configured with CHO and DAPS HO modes.

2. The switching configuration method according to claim 1 further includes: After receiving the handover success message sent by the target base station, the connection with the terminal is disconnected.

3. The switching configuration method according to claim 1, wherein, A radio resource control reconfiguration message is sent to the terminal via radio resource control reconfiguration signaling. The relevant information elements of the radio resource control reconfiguration signaling include relevant indication information of CHO and DAPS HO, which are used to indicate that one or more DRBs are configured with CHO and DAPS HO modes.

4. The switching configuration method according to claim 1, wherein, The conditional handover information element of the handover request signaling includes a first DRB list element, which includes a DRB identifier and DAPS request information.

5. The switching configuration method according to claim 1, wherein, The DRB mapping of the handover request signaling to the list of information elements in the quality of service flow includes DAPS request information elements, which carry CHO-related information.

6. The switching configuration method according to claim 1, wherein, The conditional handover information element of the handover request confirmation signaling includes a second DRB list element, which includes a DRB identifier and DAPS response information.

7. The switching configuration method according to claim 1, wherein, The DAPS response information element of the handover request confirmation signaling includes CHO-related information.

8. The switching configuration method according to claim 3, wherein, The conditional reconfiguration add list information element of the Radio Resource Control (DRC) reconfiguration signaling includes DAPS configuration-related information and DRB add list information. The DRB add list information includes the identifier of the DRB that accepts the DAPS HO method.

9. The switching configuration method according to claim 3, wherein, The Radio Bearer Configuration Information DRB Add List cell in the Radio Resource Control Reconfiguration Signaling includes DAPS-related configuration cells, and the DAPS-related configuration cells include conditional handover related information.

10. The switching configuration method according to any one of claims 1 to 9, further comprising: After receiving the handover request response signaling from each candidate base station, the system sends the data to be transmitted and the corresponding sequence number (SN) state transition signaling to each candidate base station.

11. A base station, comprising: The request sending unit is configured to send a handover request message to each candidate base station via handover request signaling when it is determined that the terminal is simultaneously configured with Conditional Handover (CHO) and Dual Activation Protocol Stack (DAPS) Handover (HO) modes. The relevant information elements of the handover request signaling contain relevant indication information of CHO and DAPS HO, which are used to indicate that CHO and DAPS HO modes are configured for one or more Data Radio Bearers (DRBs). The handover request message includes the first configuration information of the DRB configured with CHO and DAPS HO modes. The response receiving unit is configured to receive a handover request response message sent by each candidate base station via handover request confirmation signaling. The relevant information elements of the handover request confirmation signaling include indication information on whether to accept CHO and DAPS HO modes. The handover request response message includes second configuration information indicating acceptance of the CHO and DAPS HO modes. The information sending unit is configured to send a radio resource control reconfiguration message to the terminal so that the terminal can select a target base station for handover among candidate base stations. The radio resource control reconfiguration message includes third configuration information of the DRB configured with CHO and DAPS HO modes.

12. The base station according to claim 11, further comprising: The terminal handover unit is configured to disconnect from the terminal after receiving a successful terminal handover message sent by the target base station.

13. A base station, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the switching configuration method as described in any one of claims 1 to 10 based on instructions stored in the memory.

14. A switching configuration system, comprising: The first base station is the base station according to any one of claims 11 to 13; as well as When the second base station is a candidate base station, it is configured to send a handover request response message to the first base station. The handover request response message includes second configuration information indicating acceptance of the CHO and DAPS HO configuration methods.

15. The switching configuration system according to claim 14, further comprising: The terminal is configured to receive a radio resource control reconfiguration message sent by the first base station, and select a target base station from the candidate base stations for handover according to the radio resource control reconfiguration message. The radio resource control reconfiguration message includes third configuration information of DRB configured with CHO and DAPS HO modes.

16. A non-transitory computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the switching configuration method as described in any one of claims 1 to 10.

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