Method for sending successful switching report, terminal device and network device

Abstract

The embodiments of the present application relate to a method, a terminal device, and a network device for sending a successful handover report, wherein the method includes: sending a successful handover report when a conditional handover (CHO) is successful, and the successful handover report includes at least one of the following: a signal measurement result of the terminal device on a neighboring cell; a signal measurement result of the terminal device on a candidate cell that does not meet the handover condition; a list of candidate cells that meet the handover condition; a list of candidate cells that do not meet the handover condition; an identifier of a source cell; information indicating whether a radio link failure RLF has occurred in the source cell before the terminal device executes CHO; and the length of time from receiving the CHO configuration to triggering the CHO. The embodiments of the present application can enable the terminal to report the content of the successful handover report after the conditional handover is successful, and the content helps the network adjust the configuration parameters.

Description

[0001] This application is a divisional application of the PCT international patent application PCT / CN2020 / 114001 with an application date of September 8, 2020, which entered the Chinese national phase with Chinese patent application number 202080104950.2 and the invention name being "Method, terminal device and network device for sending a successful switching report". Technical Field

[0002] The present application relates to the field of communications, and more specifically, to a method for sending a successful switching report, a terminal device, and a network device. Background Art

[0003] Different from traditional handover, conditional handover (CHO) is a cell handover method in which the terminal independently determines the handover time and handover object. In the conditional handover method, after receiving the RRC reconfiguration (RRCReconfiguration) containing the handover configuration, the terminal does not immediately perform the handover, but evaluates whether the CHO execution conditions are met. If the subsequent evaluation result is satisfied, the terminal will then access the target cell. At this time, the terminal does not need to ask the source base station whether to allow the handover to be performed.

[0004] If a terminal switches prematurely, such as a switching failure occurs during the process of accessing the target node or a radio link failure (RLF) occurs on the target node after the switching is successfully completed, the terminal selects the source cell after the cell selection process and initiates the reconstruction process. After the reconstruction is completed, the terminal sends a radio link failure report (RLFreport) to the source node. If the source base station finds that this is a premature switching problem, it can change the threshold setting of the measurement target corresponding to the terminal measurement report event. This process is called Mobility Robust Optimization (MRO). The current version of MRO does not consider the content of the successful switching report reported by the terminal after a successful switching. For CHO, this part of the content also helps the network adjust the configuration parameters, such as reducing the number of configured candidate switching cells. Summary of the invention

[0005] The embodiments of the present application provide a method, a terminal device and a network device for sending a successful switching report, which can enable the terminal to report the content of the successful switching report after the conditional switching is successful, and the content is helpful for the network to adjust the configuration parameters.

[0006] The embodiment of the present application provides a method for sending a successful handover report, which is applied to a terminal device and includes:

[0007] When the conditional handover CHO succeeds, a successful handover report is sent. The successful handover report includes at least one of the following:

[0008] Signal measurement results of the terminal device on the neighboring cell;

[0009] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0010] A list of candidate cells that meet the switching conditions;

[0011] A list of candidate cells that do not meet the switching conditions;

[0012] The identifier of the source cell;

[0013] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0014] The length of time from receiving the CHO configuration to triggering the CHO.

[0015] The embodiment of the present application further proposes a method for sending a successful handover report, which uses a target base station and includes:

[0016] Receive a successful handover report, and forward the successful handover report to the source base station; the successful handover report includes at least one of the following:

[0017] Signal measurement results of the terminal device on the neighboring cell;

[0018] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0019] A list of candidate cells that meet the switching conditions;

[0020] A list of candidate cells that do not meet the switching conditions;

[0021] The identifier of the source cell;

[0022] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0023] The length of time from receiving the CHO configuration to triggering the CHO.

[0024] The embodiment of the present application further proposes a method for receiving and applying a successful handover report, which is applied to a source base station, including:

[0025] A successful handover report is received from the terminal device, where the successful handover report includes at least one of the following:

[0026] Signal measurement results of the terminal device on the neighboring cell;

[0027] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0028] A list of candidate cells that meet the switching conditions;

[0029] A list of candidate cells that do not meet the switching conditions;

[0030] The identifier of the source cell;

[0031] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0032] The length of time from receiving the CHO configuration to triggering the CHO.

[0033] The present application also provides a terminal device, including:

[0034] The sending module is used to send a successful switching report when the conditional switching CHO is successful. The successful switching report includes at least one of the following:

[0035] Signal measurement results of the terminal device on the neighboring cell;

[0036] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0037] A list of candidate cells that meet the switching conditions;

[0038] A list of candidate cells that do not meet the switching conditions;

[0039] The identifier of the source cell;

[0040] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0041] The length of time from receiving the CHO configuration to triggering the CHO.

[0042] The present application also provides a network device, including:

[0043] A first receiving module, configured to receive a successful switching report;

[0044] A forwarding module, configured to forward a successful handover report to a source base station; the successful handover report includes at least one of the following:

[0045] Signal measurement results of the terminal device on the neighboring cell;

[0046] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0047] A list of candidate cells that meet the switching conditions;

[0048] A list of candidate cells that do not meet the switching conditions;

[0049] The identifier of the source cell;

[0050] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0051] The length of time from receiving the CHO configuration to triggering the CHO.

[0052] The present application also provides a network device, including:

[0053] The second receiving module is configured to receive a successful switching report of the terminal device, where the successful switching report includes at least one of the following:

[0054] Signal measurement results of the terminal device on the neighboring cell;

[0055] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0056] A list of candidate cells that meet the switching conditions;

[0057] A list of candidate cells that do not meet the switching conditions;

[0058] The identifier of the source cell;

[0059] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0060] The length of time from receiving the CHO configuration to triggering the CHO.

[0061] An embodiment of the present application further proposes a terminal device, comprising: a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute any of the above methods.

[0062] An embodiment of the present application further proposes a network device, comprising: a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute any of the above methods.

[0063] An embodiment of the present application further proposes a chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes any of the above methods.

[0064] An embodiment of the present application further proposes a chip, comprising: a processor, configured to call and run a computer program from a memory, so that a device equipped with the chip executes any of the above methods.

[0065] The embodiment of the present application further provides a computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute any of the above methods.

[0066] The embodiment of the present application further provides a computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute any of the methods described above.

[0067] An embodiment of the present application further provides a computer program product, comprising computer program instructions, which enable a computer to execute any of the methods described above.

[0068] An embodiment of the present application further provides a computer program product, comprising computer program instructions, which enable a computer to execute any of the methods described above.

[0069] The embodiment of the present application also provides a computer program, which enables a computer to execute any of the methods described above.

[0070] The embodiment of the present application also provides a computer program, which enables a computer to execute any of the methods described above.

[0071] The embodiment of the present application sends a successful switching report when the conditional switching is successful, so that the terminal device reports the content of the successful switching report after the conditional switching is successful, and the content helps the network adjust the configuration parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0072] Figure 1 It is a schematic diagram of an application scenario of an embodiment of the present application.

[0073] Figure 2 It is a flow chart of an implementation of a method 200 for sending a successful switching report according to an embodiment of the present application.

[0074] Figure 3 It is a flow chart of an implementation of a method 300 for sending a successful switching report according to an embodiment of the present application.

[0075] Figure 4 It is a flow chart of an implementation of a method 400 for sending a successful switching report according to an embodiment of the present application.

[0076] Figure 5 This is a time diagram of a terminal device determining whether to send a successful switching report in a method for sending a successful switching report according to an embodiment of the present application.

[0077] Figure 6 It is a flow chart of an implementation of a method 600 for sending a successful switching report according to an embodiment of the present application.

[0078] Figure 7 It is a flow chart of an implementation method 700 for receiving and applying a successful switching report according to an embodiment of the present application.

[0079] Figure 8 It is a schematic diagram of the structure of a terminal device 800 according to an embodiment of the present application.

[0080] Fig. 9 It is a schematic diagram of the structure of a network device 900 according to an embodiment of the present application.

[0081] Fig.10 It is a schematic diagram of the structure of a network device 1000 according to an embodiment of the present application.

[0082] Fig.11 It is a schematic diagram of the structure of a network device 1100 according to an embodiment of the present application.

[0083] Fig.12 is a schematic structural diagram of a communication device 1200 according to an embodiment of the present application;

[0084] Fig.13 is a schematic structural diagram of a chip 1300 according to an embodiment of the present application. DETAILED DESCRIPTION

[0085] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0086] It should be noted that the terms "first", "second", etc. in the description and claims of the embodiments of the present application and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. The objects described by the "first" and "second" described at the same time may be the same or different.

[0087] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced Long Term Evolution (LTE-A) system, New Radio (NR) system, NR system evolution system, LTE on unlicensed spectrum (LTE-U) system, NR on unlicensed spectrum (NR-based access to unlicensed spectrum, NR-U) system, Universal Mobile Telecommunication System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (WiFi), 5th-Generation (5G) system or other communication systems.

[0088] Generally speaking, traditional communication systems support a limited number of connections and are easy to implement. However, with the development of communication technology, mobile communication systems will not only support traditional communications, but will also support, for example, device to device (Device to Device, D2D) communication, machine to machine (Machine to Machine, M2M) communication, machine type communication (Machine Type Communication, MTC), and vehicle to vehicle (Vehicle to Vehicle, V2V) communication, etc. The embodiments of the present application can also be applied to these communication systems.

[0089] Optionally, the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.

[0090] The embodiments of the present application do not limit the spectrum to which they are applied. For example, the embodiments of the present application can be applied to licensed spectrum or unlicensed spectrum.

[0091] The embodiments of the present application describe various embodiments in combination with network devices and terminal devices, wherein: the terminal device may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc. The terminal device may be a station (STAION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, and a next-generation communication system, for example, a terminal device in an NR network or a terminal device in a future evolved Public Land Mobile Network (PLMN) network, etc.

[0092] As an example but not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes. A wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.

[0093] The network device can be a device used to communicate with a mobile device. The network device can be an access point (AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, etc.

[0094] In an embodiment of the present application, a network device provides services for a cell, and a terminal device communicates with the network device through transmission resources (e.g., frequency domain resources, or spectrum resources) used by the cell. The cell may be a cell corresponding to a network device (e.g., a base station). The cell may belong to a macro base station or a base station corresponding to a small cell. The small cells here may include: a metro cell, a micro cell, a picocell, a femtocell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.

[0095] Figure 1 An example is shown of a terminal device, a source node (Source NG-RAN node) and a target node (Target NG-RAN node). The source node may be a source base station, and the target node may be a target base station. The terminal device performs conditional switching, switching from the source base station to the target base station.

[0096] Optionally, the wireless communication system 100 may also include other network entities such as a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF), etc., which is not limited in the embodiments of the present application.

[0097] It should be understood that the terms "system" and "network" are often used interchangeably in this article. The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0098] The present application embodiment provides a method for sending a successful switching report. Figure 2 is a flowchart of a method 200 for sending a successful handover report according to an embodiment of the present application, which method can optionally be applied to Figure 1 The system shown, if applied to Figure 1 The terminal device in the system shown is, but not limited to, the method includes at least part of the following contents.

[0099] S210: Send a successful handover report when the conditional handover (CHO) is successful. The successful handover report includes at least one of the following:

[0100] Signal measurement results of the terminal device on the neighboring cell;

[0101] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0102] A list of candidate cells that meet the switching conditions;

[0103] A list of candidate cells that do not meet the switching conditions;

[0104] The identifier of the source cell;

[0105] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0106] The length of time from receiving the CHO configuration to triggering the CHO.

[0107] In the embodiment of the present application, the candidate cells can be determined in the following manner:

[0108] After receiving the measurement report from the terminal, the source base station determines a possible conditional handover target cell range based on the measurement report of the terminal. After that, the source base station negotiates with the base stations where these cells are located, asking the other party for the possibility of accepting the conditional handover. If the other party accepts the handover of the terminal, it will send a handover request confirmation message to the source base station; the message will also carry information such as access resources and bearer configuration for the terminal to access the target cell under the base station. The cell within the target cell range that confirms that it accepts the terminal handover is the candidate cell.

[0109] Optionally, the signal measurement result of the neighboring cell by the terminal device includes: the signal measurement result of the neighboring cell by the terminal device before the conditional switching is performed, or before the conditional switching is completed, or before the signal measurement result of at least one candidate cell meets the switching condition;

[0110] The signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions include: the signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions before the conditional switching is performed, or before the conditional switching is completed, or before the signal measurement results of at least one candidate cell meet the switching conditions.

[0111] Optionally, the signal measurement result includes at least one of the following:

[0112] Reference Signal Receiving Power (RSRP);

[0113] Reference Signal Receiving Quality (RSRQ);

[0114] Signal to Interference plus Noise Ratio (S1NR)

[0115] The signal measurement result of the neighboring cell by the terminal device may be expressed in at least the following three forms:

[0116] In the first type, the signal measurement result of the terminal device on the neighboring cell includes the measurement result of each neighboring cell, and the measurement result of each neighboring cell includes at least one of the following:

[0117] The signal measurement result of the neighboring cell;

[0118] The cell ID of the neighboring cell;

[0119] Indication information of whether the neighboring cell is a candidate cell.

[0120] For example, an identifier is added to the measResultNR of the neighboring cell to identify whether the corresponding neighboring cell is a candidate cell, as shown below:

[0121]

[0122] As can be seen from the above example, an optional flag is added to measResuttNR, namely isCandidateCell, and the possible values ​​of the flag are true (true) and false (false), which are used to indicate that the cell is a candidate cell or not a candidate cell respectively.

[0123] The second type is that the signal measurement results of the terminal device on the neighboring cells include a measurement result list of neighboring cells corresponding to different synchronization signal blocks (SSB, Synchronization Signal Block) or channel status indicator reference signals (CSI-RS, Channel Status Indicator Reference Signal) frequencies, and the measurement result list of neighboring cells contains the signal measurement results of each neighboring cell.

[0124] Furthermore, the neighbor cell measurement result list or the signal measurement result of each neighbor cell further includes information indicating whether each neighbor cell is a candidate cell.

[0125] For example, the measurement result list of neighboring cells is specifically measResultNRList, and a bitmap is added to measResultNRList to identify which cells in the list are candidate cells. Each bit in the bitmap corresponds to a cell, which is used to indicate whether the cell is a candidate cell; for example, a bitmap containing 6 bits can identify a cell list containing 6 neighboring cells. When the bitmap is 000111, it indicates that the last 3 cells in the list are candidate cells.

[0126] The third type is that the signal measurement result of the terminal device on the neighboring cell includes: a first neighboring cell measurement result list and a second neighboring cell measurement result list; wherein,

[0127] The first neighboring cell measurement result list includes signal measurement results of neighboring cells belonging to the candidate cell;

[0128] The second neighboring cell measurement result list includes signal measurement results of neighboring cells that do not belong to the candidate cell.

[0129] For example, the original measResultNeighbourCell is split into two, namely, measResultCandidateCell and measResultNonCandidateCell, wherein measResultCandidateCell includes the signal measurement results of the neighboring cells belonging to the candidate cell, and measResultNonCandidateCell includes the signal measurement results of the neighboring cells not belonging to the candidate cell.

[0130] Optionally, when the above information used to indicate whether a radio link failure RLF occurred in the source cell before the terminal device executed CHO indicates that RLF occurred, the successful switching report also includes: the signal measurement results of the terminal device on the candidate cell and / or the signal measurement results of the neighboring cell before RLF occurred in the source cell.

[0131] Optionally, when it is confirmed that the target base station has sent a UE context release (UE context release) message to the source base station, since the source base station cannot know the cell identifiers (IDs) of the candidate cells, the above successful handover report may also include a list of cell identifiers of the candidate cells.

[0132] The information contained in the above successful switching report can be used to help the network adjust configuration parameters. The specific adjustment method will be described in detail in the subsequent method applied to the network device.

[0133] The present application embodiment proposes two reporting mechanisms for successful switching reports, including: reporting immediately after the conditional switching is completed and reporting after the terminal completes the switching and enters a stable state. The following is a detailed introduction:

[0134] The first reporting mechanism:

[0135] The terminal device sends a successful switching report immediately after the conditional switching is completed. There are at least two implementation forms:

[0136] (1) The first implementation form:

[0137] Sending a successful switching report includes:

[0138] The terminal device sends a first RRC signaling or a media access control (MAC) control element (CE), where the first RRC signaling or MAC CE carries information that the terminal device has a successful handover report;

[0139] Receiving a second RRC signaling or MAC CE, where the second RRC signaling or MAC CE is used to request the terminal device to report a successful handover report;

[0140] The terminal device sends a third RRC signaling or MAC CE, which carries a successful switching report.

[0141] Figure 3 FIG. 3 is a flowchart of a method 300 for sending a successful handover report according to an embodiment of the present application. Figure 3 As shown, the following steps are included:

[0142] S310: The terminal device sends a first RRC signaling or MAC CE to a network device (such as a source base station), carrying information that the terminal device has a successful handover report.

[0143] S320: The network device sends a second RRC signaling or MAC CE to the terminal device, for requesting the terminal device to report a successful handover report;

[0144] S330: The terminal device sends a third RRC signaling or MAC CE to the network device, carrying a successful switching report.

[0145] Optionally, the first RRC signaling includes an RRC reconfiguration complete (RRCReconfigurationComplete) signaling.

[0146] The second RRC signaling includes an information request (InformationRequest).

[0147] The third RRC signaling includes an information response (InformationResponse).

[0148] (2) The second implementation form:

[0149] Sending a successful switching report includes:

[0150] receiving a fourth RRC signaling, the fourth RRC signaling being used to instruct the terminal device to report a successful switching report through a fifth RRC signaling;

[0151] A fifth RRC signaling is sent, where the fifth RRC signaling carries a successful handover report.

[0152] Figure 4 FIG. 4 is a flowchart of a method 400 for sending a successful handover report according to an embodiment of the present application. Figure 4 As shown, the following steps are included:

[0153] S410: The network device (such as the source base station) sends a fourth RRC signaling to the terminal device, which is used to instruct the terminal device to report a successful handover report through a fifth RRC signaling;

[0154] S420: The terminal device sends a fifth RRC signaling to the network device, carrying a successful switching report.

[0155] Optionally, the fourth RRC signaling includes RRC reconfiguration signaling.

[0156] Optionally, the fifth RRC signaling includes an RRC reconfiguration completion (RRCReconfigurationComplete) signaling.

[0157] The second reporting mechanism:

[0158] In the overall process of Mobility Robustness Enhancement (MRO), if a radio link failure occurs shortly after the terminal switches to the target cell, it is considered that a too early handover (HO) has occurred. At this time, the terminal needs to perform cell selection and then go through the reconstruction process. After the reconstruction is completed, the terminal needs to report the stored radio link failure report to the target cell. If the successful completion of the handover means that the terminal can still stably maintain the connection with the target base station after the handover process is completed, then the timing of reporting the successful handover needs to be changed. Based on this, the embodiment of the present application proposes a second reporting mechanism, that is, the terminal device sends a successful handover report after the conditional handover is successfully completed.

[0159] In traditional handovers, the terminal maintains a time value after starting the handover, indicating the value from the handover initialization (for example, receiving the last RRCReconfiguration message) to a certain moment later. If at a certain moment, the terminal detects a radio link failure, the terminal stops maintaining this time value, fills this time value into the timeConnFailure field in the RLF report and reports it to the network. When the network obtains this information element (IE, Information Element), the network compares the time value in timeConnFailure with the threshold Tstore UE cntxt to determine whether the terminal has experienced a too early HO (timeConnFailure < Tstore_UE_cntxt). The second reporting mechanism proposed in the embodiment of the present application can set a time length threshold (T_threahold), record the time by the terminal device or the network side, and when the recorded time value is equal to or exceeds T_threahold, the terminal device sends a successful handover report.

[0160] The second reporting mechanism can have at least the following two implementation forms:

[0161] (1) The first implementation form: The terminal actively reports:

[0162] In this implementation form, the above-mentioned sending of the successful handover report includes: The terminal device starts recording time from the first starting moment, and when the recorded time value is equal to or exceeds the first threshold, it sends a successful handover report through the RRC signaling.

[0163] Or, the above-mentioned sending of the successful handover report includes: The terminal device starts recording time from the first starting moment, and when the recorded time value is equal to or exceeds the first threshold, it sends the information that the terminal device has a successful handover report through the RRC signaling or the MAC signaling;

[0164] Receiving a message requesting the terminal device to report a successful handover report;

[0165] A successful handover report is sent via RRC signaling.

[0166] In the above manner, the network device that interacts with the terminal device may be a source base station.

[0167] Optionally, the first starting time may include at least one of the following:

[0168] The time point when the RRC signaling including the conditional reconfiguration is received;

[0169] The time point when the condition switching starts to be executed;

[0170] The time point when the conditional switch is completed.

[0171] In some implementations, the time point for starting to execute the conditional switching includes at least one of the following:

[0172] Evaluate the time point at which CHO conditions are met;

[0173] The time point of sending random access message 1 (Msg1) or message 3 or message A or RRC reconfiguration complete (RRCReconfigurationComplete) message.

[0174] In some implementations, the time point at which the upper condition switching is completed includes at least one of the following:

[0175] The time point when an RRC reconfiguration message or a random access message 2 or message B is received;

[0176] The time point when the RRC reconfiguration complete (RRCReconfigurationComplete) message is sent.

[0177] Figure 5 FIG. 1 is a time diagram of a terminal device determining whether to send a successful switching report in a method for sending a successful switching report according to an embodiment of the present application. Figure 5 As shown, there are at least three situations for the starting time of the terminal device to record the time, namely, the time point when the terminal device receives the RRC signaling containing the Condition1Reconfiguration configuration, the time point when the conditional switching starts, and the time point when the conditional switching is completed. Corresponding to the three different starting times, a first threshold value (such as T threshold) with different values ​​can be used; when the time value recorded from the starting time is equal to or exceeds the first threshold, a successful switching report can be sent.

[0178] Optionally, the first threshold is configured by the network device through RRC signaling or maintained by the terminal device.

[0179] (2) The second implementation form: the network instructs the terminal to report:

[0180] In this implementation form, the sending of the successful switching report includes: receiving an indication for reporting the successful switching report, and sending the successful switching report according to the indication.

[0181] Optionally, the indication of reporting a successful handover report is received when the following conditions are met:

[0182] The network device starts recording the time from the second starting moment. When the recorded time value is equal to or exceeds the second threshold, no RRC reconstruction message is received from the terminal device and no failure indication information about the terminal device or signaling containing the terminal device wireless link failure information is received on the Xn or NG interface.

[0183] Optionally, the second starting time includes at least one of the following:

[0184] The time point of sending the RRC signaling including the conditional reconfiguration configuration (Condition1Reconfiguration);

[0185] Confirm the time point when the terminal device successfully receives the RRC signaling containing the conditional reconfiguration (Condition1Reconfiguration); for example, receive the confirmation (ACK) message of the network device regarding the RRC signaling containing Condition1Reconfiguration

[0186] The time point when the condition switching starts to be executed;

[0187] The time point when the conditional switch is completed.

[0188] In some implementations, the time point for starting to perform conditional switching includes the time point for receiving random access message 1 or message 3 or message A or RRC reconfiguration completion message.

[0189] In some implementations, the time point at which the above conditional switching is completed includes at least one of the following:

[0190] The time point of sending the RRC reconfiguration message or the random access message 2 or message B;

[0191] Confirm the time point when the terminal successfully receives the RRC reconfiguration message or the random access message 2 or message B;

[0192] The time point when the RRC reconfiguration complete (RRCReconfigurationComplete) message is received.

[0193] Similarly, there are at least three situations for the starting time of the network device recording time, namely, the time point of sending the RRC signaling containing the Condition1Reconfiguration configuration / confirming that the terminal device has received the RRC signaling containing the Condition1Reconfiguration configuration, the time point of starting to execute the conditional switching, and the time point of completing the conditional switching. Corresponding to the three different starting times, a second threshold value (such as T_threahold) with different values ​​can be used; when the time value recorded from the starting time is equal to or exceeds the second threshold value, it indicates that the terminal device can send a successful switching report.

[0194] The embodiment of the present application also proposes a method for sending a successful switching report. Figure 6 is a flowchart of a method 600 for sending a successful handover report according to an embodiment of the present application, which method can optionally be applied to Figure 1 The system shown, if applied to Figure 1 The target base station in the system shown is, but not limited to, the method includes at least part of the following contents.

[0195] S610: receiving a successful handover report;

[0196] S610: Forward the successful handover report to the source base station; the successful handover report includes at least one of the following:

[0197] Signal measurement results of the terminal device on the neighboring cell;

[0198] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0199] A list of candidate cells that meet the switching conditions;

[0200] A list of candidate cells that do not meet the switching conditions;

[0201] The identifier of the source cell;

[0202] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0203] The length of time from receiving the CHO configuration to triggering the CHO.

[0204] Optionally, in the above step S610, the source base station receives a successful switching report from the terminal device.

[0205] Optionally, in the above step S620, the successful switching report is forwarded to the source base station via Xn signaling.

[0206] In some implementations, the signal measurement result of the neighboring cell by the terminal device includes: the signal measurement result of the neighboring cell by the terminal device before the conditional switching is performed, or before the conditional switching is completed, or before the signal measurement result of at least one candidate cell satisfies the switching activation condition;

[0207] The signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions include: the signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions before the conditional switching is performed, or before the conditional switching is completed, or before the signal measurement results of at least one candidate cell meet the switching activation conditions.

[0208] Optionally, the signal measurement result includes at least one of the following:

[0209] Reference signal received power RSRP;

[0210] Reference signal received quality RSRQ;

[0211] Signal to Interference plus Noise Ratio SINR.

[0212] In some implementations, the signal measurement result of the terminal device on the neighboring cell includes a measurement result of each neighboring cell, and the measurement result of each neighboring cell includes at least one of the following:

[0213] Signal measurement results of neighboring cells;

[0214] The cell ID of the neighboring cell;

[0215] Indication information of whether a neighboring cell is a candidate cell.

[0216] Optionally, the signal measurement results of the terminal device on the neighboring cells include a measurement result list of neighboring cells corresponding to different synchronization signal blocks SSB or channel state indication reference signal CSI-RS frequencies, and the neighboring cell measurement result list contains the signal measurement results of each neighboring cell.

[0217] Optionally, the neighbor cell measurement result list or the signal measurement result of each neighbor cell further includes information indicating whether each neighbor cell is a candidate cell.

[0218] Optionally, the signal measurement result of the terminal device on the neighboring cell includes: a first neighboring cell measurement result list and a second neighboring cell measurement result list; wherein,

[0219] The first neighboring cell measurement result list includes signal measurement results of neighboring cells belonging to the candidate cell;

[0220] The second neighboring cell measurement result list includes signal measurement results of neighboring cells that do not belong to the candidate cell.

[0221] In some implementations, when it is indicated that RLF has occurred, the successful handover report further includes: a signal measurement result of the terminal device on the candidate cell and / or a signal measurement result on the neighboring cell before the RLF occurs in the source cell.

[0222] In some implementations, when it is confirmed that the target base station has sent a UE context release message to the source base station, the successful handover report further includes a list of cell identifiers of candidate cells.

[0223] Optionally, when the statistical time value is equal to or exceeds the third threshold, if the target base station has not received the RLF report sent by the terminal device and has not received the failure information about the terminal device sent by other base stations, the successful switching report is forwarded to the source base station. For example, under the first reporting mechanism mentioned above (the terminal reports immediately after the switching is completed), the target base station will forward the successful switching report to the base station where the source cell is located only when it does not receive the RLF report of the terminal later (such as before T_threshold expires) and does not receive the failure indication message about the terminal from other stations.

[0224] In some implementations, the receiving of the successful handover report in step S610 includes:

[0225] Receiving a first RRC signaling or MAC CE, where the first RRC signaling or MAC CE carries information that the terminal device has a successful handover report;

[0226] Sending a second RRC signaling or MAC CE, where the second RRC signaling or MAC CE is used to request the terminal device to report a successful handover report;

[0227] A third RRC signaling or MAC CE is received, where the third RRC signaling or MAC CE carries a successful handover report.

[0228] Optionally, the first RRC signaling includes an RRC reconfiguration complete (RRCReconfigurationComplete) signaling.

[0229] Optionally, the second RRC signaling includes an information request (InformationRequest).

[0230] Optionally, the third RRC signaling includes an information response (InformationResponse).

[0231] In some implementations, the receiving of the successful handover report in step S610 includes:

[0232] Sending a fourth RRC signaling, where the fourth RRC signaling is used to instruct the terminal device to report a successful switching report through a fifth RRC signaling;

[0233] A fifth RRC signaling is received, where the fifth RRC signaling carries a successful handover report.

[0234] Optionally, the fourth RRC signaling includes RRC reconfiguration signaling.

[0235] Optionally, the fifth RRC signaling includes an RRC reconfiguration completion (RRCReconfigurationComplete) signaling.

[0236] In some implementations, the receiving of the successful handover report in step S610 includes:

[0237] Receiving RRC signaling or MAC signaling, the RRC signaling or MAC signaling carrying information that the terminal device has a successful handover report;

[0238] Send a message requesting the terminal device to report a successful switching report;

[0239] A successful handover report is received via RRC signaling.

[0240] In some implementations, the receiving of the successful handover report in step S610 includes:

[0241] Start recording the time from the second starting moment, and when the recorded time value is equal to or exceeds the second threshold, if no RRC reconstruction message sent by the terminal device is received and no failure indication information about the terminal device or signaling containing radio link failure information of the terminal device is received on the Xn or NG interface, an indication of reporting a successful switching report is sent to the terminal device;

[0242] Receive a successful switch report.

[0243] In the above step S610, the device that interacts with the target base station may be a terminal device.

[0244] Optionally, the second starting time includes at least one of the following:

[0245] The time point of sending the RRC signaling containing the conditional reconfiguration configuration;

[0246] Confirm the time point when the terminal device successfully receives the RRC signaling containing the conditional reconfiguration;

[0247] The time point when the condition switching starts to be executed;

[0248] The time point when the conditional switch is completed.

[0249] Optionally, the time point for starting to execute the conditional switching includes a time point for receiving a random access message 1 or message 3 or message A or an RRC reconfiguration completion message.

[0250] Optionally, the time point at which the above conditional switching is completed includes at least one of the following:

[0251] The time point of sending the RRC reconfiguration message or random access message 2 or message B;

[0252] Confirm the time point when the terminal successfully receives the RRC reconfiguration message or random access message 2 or message B;

[0253] The time point when the RRC reconfiguration complete message is received.

[0254] Optionally, the method proposed in the embodiment of the present application further includes optimizing the duration of reserved access dedicated resources according to the length of time from receiving the CHO configuration to triggering the CHO.

[0255] The present application also provides a method for receiving and applying a successful switching report. Figure 7 is a flowchart of a method 700 for receiving and applying a successful handover report according to an embodiment of the present application. The method can optionally be applied to Figure 1 The system shown, if applied to Figure 1 The source base station in the system shown is, but not limited to, the method includes at least part of the following contents.

[0256] S710: Receive a successful switching report from a terminal device, where the successful switching report includes at least one of the following:

[0257] Signal measurement results of the terminal device on the neighboring cell;

[0258] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0259] A list of candidate cells that meet the switching conditions;

[0260] A list of candidate cells that do not meet the switching conditions;

[0261] The identifier of the source cell;

[0262] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0263] The length of time from receiving the CHO configuration to triggering the CHO.

[0264] Optionally, the above method may further include: optimizing the conditional switching configuration according to the successful switching report.

[0265] In some implementations, the signal measurement result of the neighboring cell by the terminal device includes: the signal measurement result of the neighboring cell by the terminal device before the conditional switching is performed, or before the conditional switching is completed, or before the signal measurement result of at least one candidate cell satisfies the switching condition;

[0266] In some embodiments, the signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions include: the signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions before the conditional switching is performed, or before the conditional switching is completed, or before the signal measurement results of at least one candidate cell meet the switching conditions.

[0267] In some implementations, the above-mentioned optimization condition switching configuration includes:

[0268] Access resources of candidate cells that do not need to be configured with CHO are reduced for the first terminal, where the first terminal is a terminal device that has a similar moving trajectory and / or reports a similar measurement report as the terminal device that sends the successful handover report.

[0269] Optionally, the source base station may reduce access resources of candidate cells for which CHO is unnecessary according to at least one of the following:

[0270] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0271] A list of candidate cells that meet the switching conditions;

[0272] A list of candidate cells that do not meet the switching conditions;

[0273] In some implementations, the above-mentioned optimization condition switching configuration includes:

[0274] It is necessary to additionally configure access resources of candidate cells of CHO for the first terminal, where the first terminal is a terminal device having a similar moving trajectory and / or reporting a similar measurement report as the terminal device sending the successful handover report.

[0275] Optionally, the source base station may add access resources of candidate cells for which additional CHO configuration is necessary based on the signal measurement result of the terminal device on the neighboring cells. For example, if the measurement result of a neighboring cell is very high and the neighboring cell is not in the previously configured candidate cell list, the neighboring cell is added as a candidate cell for subsequent CHO.

[0276] In some implementations, the above-mentioned optimization condition switching configuration includes:

[0277] If RLF occurs in the source cell before the terminal device executes CHO, and the time length from receiving the CHO configuration to triggering the CHO is equal to or exceeds the time length threshold, the CHO condition of the target cell is adjusted for the first terminal; the first terminal is a terminal device that has a similar mobile trajectory to the terminal device that sends the successful switching report and / or reports a similar measurement report.

[0278] Optionally, the source base station adjusting the CHO condition of the target cell may include: adjusting the CHO condition of the target cell to be easier to satisfy.

[0279] Optionally, the source base station may determine the magnitude of the adjustment based on the signal measurement result of the terminal device on the source cell when RLF occurs. For example, if the signal quality of the source cell is very poor, the magnitude of the condition adjustment is greater, such as adjusting the trigger time (time-to-trigger) duration to be shorter or reducing the difference in signal thresholds between the target cell and the source cell.

[0280] In some embodiments, the above-mentioned method of optimizing the conditional handover configuration includes: reducing the conditional handover start threshold according to information indicating whether a radio link failure RLF has occurred in the source cell before the terminal device performs CHO and / or the source cell signal measurement amount measured before the RLF occurs in the source cell and / or the measured neighboring cell consumption measurement amount. Radio link failure and corresponding cell measurement information can help the source base station to more accurately optimize and reduce the conditional handover start threshold so as to reduce the time when the terminal interrupts the transmission link.

[0281] Optionally, the method proposed in the embodiment of the present application further includes: negotiating a preferred dedicated resource reservation duration in a subsequent handover request (HO required / Request) signaling according to the time length from receiving the CHO configuration to triggering the CHO.

[0282] The present application also provides a terminal device, Figure 8 800 is a schematic diagram of the structure of a terminal device according to an embodiment of the present application, including:

[0283] The sending module 810 is configured to send a successful handover report when the conditional handover CHO is successful. The successful handover report includes at least one of the following:

[0284] Signal measurement results of the terminal device on the neighboring cell;

[0285] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0286] A list of candidate cells that meet the switching conditions;

[0287] A list of candidate cells that do not meet the switching conditions;

[0288] The identifier of the source cell;

[0289] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0290] The length of time from receiving the CHO configuration to triggering the CHO.

[0291] In some implementations, the signal measurement result of the neighboring cell by the terminal device includes: the signal measurement result of the neighboring cell by the terminal device before the conditional switching is performed, or before the conditional switching is completed, or before the signal measurement result of at least one candidate cell satisfies the switching condition;

[0292] The signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions include: the signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions before the conditional switching is performed, or before the conditional switching is completed, or before the signal measurement results of at least one candidate cell meet the switching conditions.

[0293] In some embodiments, the signal measurement result includes at least one of the following:

[0294] Reference Signal Received Power (RSRP);

[0295] Reference Signal Received Quality (RSRQ);

[0296] Signal to Interference plus Noise Ratio (SINR).

[0297] In some implementations, the signal measurement result of the above-mentioned terminal device on the neighboring cell includes a measurement result of each neighboring cell, and the measurement result of each neighboring cell includes at least one of the following:

[0298] Signal measurement results of neighboring cells;

[0299] The cell ID of the neighboring cell;

[0300] Indication information of whether a neighboring cell is a candidate cell.

[0301] In some implementations, the signal measurement results of the neighboring cells by the terminal device include a measurement result list of neighboring cells corresponding to different SSB or CSI-RS frequencies, and the neighboring cell measurement result list includes the signal measurement results of each neighboring cell.

[0302] In some implementations, the neighbor cell measurement result list or the signal measurement result of each neighbor cell further includes information indicating whether each neighbor cell is a candidate cell.

[0303] In some implementations, the signal measurement result of the neighboring cell by the terminal device includes: a first neighboring cell measurement result list and a second neighboring cell measurement result list; wherein:

[0304] The first neighboring cell measurement result list includes signal measurement results of neighboring cells belonging to the candidate cell;

[0305] The second neighboring cell measurement result list includes signal measurement results of neighboring cells that do not belong to the candidate cell.

[0306] In some implementations, when it is indicated that RLF has occurred, the above-mentioned successful handover report also includes: the signal measurement results of the terminal device on the candidate cell and / or the signal measurement results on the neighboring cell before the RLF occurs in the source cell.

[0307] In some implementations, when it is confirmed that the target base station has sent a UE context release message to the source base station, the successful handover report further includes a list of cell identifiers of candidate cells.

[0308] In some implementations, sending a successful switching report when the conditional switching is successful includes: sending a successful switching report immediately after the conditional switching is completed.

[0309] In some implementations, the sending module 810 is used to:

[0310] Sending a first RRC signaling or a media access control MAC control unit CE, where the first RRC signaling or MAC CE carries information that the terminal device has a successful handover report;

[0311] receiving a second RRC signaling or MAC CE, where the second RRC signaling or MAC CE is used to request the terminal device to report a successful handover report;

[0312] A third RRC signaling or MAC CE is sent, where the third RRC signaling or MAC CE carries a successful switching report.

[0313] In some implementations, the first RRC signaling includes RRC reconfiguration completion RRCReconfigurationComplete signaling.

[0314] In some implementations, the second RRC signaling includes an information request InformationRequest.

[0315] In some implementations, the third RRC signaling includes an information response InformationResponse.

[0316] In some implementations, the sending module 810 is used to:

[0317] receiving a fourth RRC signaling, where the fourth RRC signaling is used to instruct the terminal device to report a successful switching report through a fifth RRC signaling;

[0318] A fifth RRC signaling is sent, where the fifth RRC signaling carries a successful switching report.

[0319] In some implementations, the fourth RRC signaling includes RRC reconfiguration RRCReconfiguration signaling.

[0320] In some implementations, the fifth RRC signaling includes RRC reconfiguration completion RRCReconfigurationComplete signaling.

[0321] In some implementations, the sending module 810 is configured to send a successful switching report after the conditional switching is successfully completed.

[0322] In some implementations, the sending module 810 is used to: record time starting from a first starting moment, and when the recorded time value is equal to or exceeds a first threshold, send a successful switching report via RRC signaling.

[0323] In some implementations, the sending module 810 is used to:

[0324] Recording time from a first starting moment, and when the recorded time value is equal to or exceeds a first threshold, sending information that the terminal device has a successful handover report through RRC signaling or MAC signaling;

[0325] Receiving a message requesting the terminal device to report a successful switching report;

[0326] A successful handover report is sent via RRC signaling.

[0327] In some embodiments, the first starting time includes at least one of the following:

[0328] The time point when the RRC signaling including the conditional reconfiguration is received;

[0329] The time point when the condition switching starts to be executed;

[0330] The time point when the conditional switch is completed.

[0331] In some implementations, the time point for starting to execute the conditional switching includes at least one of the following:

[0332] Evaluation condition switching CHO condition is satisfied when the time point;

[0333] The time point of sending the random access message 1 or message 3 or message A or the RRC reconfiguration complete message.

[0334] In some implementations, the time point at which the above conditional switching is completed includes at least one of the following:

[0335] The time point when the RRC reconfiguration message or random access message 2 or message B is received;

[0336] The time point of sending the RRC reconfiguration completion message;

[0337] Confirm the time point when random access contention is successfully resolved.

[0338] In some implementations, the first threshold is configured by a network device through RRC signaling or maintained by a terminal device.

[0339] In some implementations, the sending module 810 is used to: receive an instruction to report a successful switching report, and send the successful switching report according to the instruction.

[0340] In some implementations, the indication of reporting a successful handover report is received when the following conditions are met:

[0341] The network device starts recording the time from the second starting moment. When the recorded time value is equal to or exceeds the second threshold, no RRC reconstruction message is received from the terminal device and no failure indication information about the terminal device or signaling containing wireless link failure information of the terminal device is received on the Xn or NG interface.

[0342] In some embodiments, the second starting time includes at least one of the following:

[0343] The time point of sending the RRC signaling containing the conditional reconfiguration configuration;

[0344] Confirm the time point when the terminal device successfully receives the RRC signaling containing the conditional reconfiguration;

[0345] The time point when the condition switching starts to be executed;

[0346] The time point when the conditional switch is completed.

[0347] In some implementations, the time point for starting to perform conditional switching includes the time point for receiving random access message 1 or message 3 or message A or RRC reconfiguration completion message.

[0348] In some implementations, the time point at which the above conditional switching is completed includes at least one of the following:

[0349] The time point of sending the RRC reconfiguration message or random access message 2 or message B;

[0350] Confirm the time point when the terminal successfully receives the RRC reconfiguration message or random access message 2 or message B;

[0351] The time point when the RRC reconfiguration complete message is received.

[0352] It should be understood that the above and other operations and / or functions of the modules in the terminal device according to the embodiment of the present application are respectively to implement Figure 2 The corresponding process of the terminal device in the method 200 is not repeated here for the sake of brevity.

[0353] The embodiment of the present application also provides a network device, Fig. 9 9 is a schematic diagram of the structure of a network device 900 according to an embodiment of the present application, including:

[0354] A first receiving module 910, configured to receive a successful handover report;

[0355] The forwarding module 920 is configured to forward the successful handover report to the source base station; the successful handover report includes at least one of the following:

[0356] Signal measurement results of the terminal device on the neighboring cell;

[0357] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0358] A list of candidate cells that meet the switching conditions;

[0359] A list of candidate cells that do not meet the switching conditions;

[0360] The identifier of the source cell;

[0361] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0362] The length of time from receiving the CHO configuration to triggering the CHO.

[0363] In some implementations, the forwarding module 920 forwards the successful handover report to the source base station via Xn signaling.

[0364] In some embodiments, when the statistical time value is equal to or exceeds the third threshold, the forwarding module 920 forwards the successful switching report to the source base station if no RLF report sent by the terminal device is received and no failure information about the terminal device is received from other base stations.

[0365] In some implementations, the first receiving module 910 is used to:

[0366] Receiving a first RRC signaling or MAC CE, where the first RRC signaling or MAC CE carries information that the terminal device has a successful handover report;

[0367] Sending a second RRC signaling or MAC CE, where the second RRC signaling or MAC CE is used to request the terminal device to report a successful handover report;

[0368] A third RRC signaling or MAC CE is received, where the third RRC signaling or MAC CE carries a successful handover report.

[0369] In some implementations, the first RRC signaling includes RRC reconfiguration completion RRCReconfigurationComplete signaling.

[0370] In some implementations, the second RRC signaling includes an information request InformationRequest.

[0371] In some implementations, the third RRC signaling includes an information response InformationResponse.

[0372] In some implementations, the first receiving module 910 is used to:

[0373] Sending a fourth RRC signaling, where the fourth RRC signaling is used to instruct the terminal device to report a successful switching report through a fifth RRC signaling;

[0374] A fifth RRC signaling is received, where the fifth RRC signaling carries a successful switching report.

[0375] In some implementations, the fourth RRC signaling includes RRC reconfiguration RRCReconfiguration signaling.

[0376] In some implementations, the fifth RRC signaling includes RRC reconfiguration completion RRCReconfigurationComplete signaling.

[0377] In some implementations, the first receiving module 910 is used to:

[0378] Receiving RRC signaling or MAC signaling, where the RRC signaling or MAC signaling carries information that the terminal device has a successful handover report;

[0379] Send a message requesting the terminal device to report a successful switching report;

[0380] A successful handover report is received via RRC signaling.

[0381] In some implementations, the first receiving module 910 is used to:

[0382] Recording the time from the second starting moment, when the recorded time value is equal to or exceeds the second threshold, if no RRC reestablishment message sent by the terminal device is received and no failure indication information about the terminal device or signaling containing radio link failure information of the terminal device is received on the Xn or NG interface, then sending an indication of reporting a successful switching report;

[0383] Receive a successful switch report.

[0384] In some embodiments, the second starting time includes at least one of the following:

[0385] The time point of sending the RRC signaling containing the conditional reconfiguration configuration;

[0386] Confirm the time point when the terminal device successfully receives the RRC signaling containing the conditional reconfiguration;

[0387] The time point when the condition switching starts to be executed;

[0388] The time point when the conditional switch is completed.

[0389] In some implementations, the time point for starting to perform conditional switching includes the time point for receiving random access message 1 or message 3 or message A or RRC reconfiguration completion message.

[0390] In some implementations, the time point at which the above conditional switching is completed includes at least one of the following:

[0391] The time point of sending the RRC reconfiguration message or random access message 2 or message B;

[0392] Confirm the time point when the terminal successfully receives the RRC reconfiguration message or random access message 2 or message B;

[0393] The time point when the RRC reconfiguration complete message is received.

[0394] Optionally, the network device is further configured to: optimize the duration of reserved access dedicated resources according to the time length from receiving the CHO configuration to triggering the CHO.

[0395] It should be understood that the above and other operations and / or functions of the modules in the network device according to the embodiment of the present application are respectively to implement Figure 6 The corresponding process of the network device in the method 600 is not repeated here for the sake of brevity.

[0396] The embodiment of the present application also proposes another network device, Fig.10 1 is a schematic diagram of the structure of a network device 1000 according to an embodiment of the present application, including:

[0397] The second receiving module 1010 is configured to receive a successful switching report of a terminal device, where the successful switching report includes at least one of the following:

[0398] Signal measurement results of the terminal device on the neighboring cell;

[0399] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0400] A list of candidate cells that meet the switching conditions;

[0401] A list of candidate cells that do not meet the switching conditions;

[0402] The identifier of the source cell;

[0403] Information used to indicate whether a radio link failure (RLF) has occurred in the source cell before the terminal device performs CHO;

[0404] The length of time from receiving the CHO configuration to triggering the CHO.

[0405] Fig.11 1 is a schematic diagram of the structure of a network device 1100 according to an embodiment of the present application. Fig.11 As shown, in some implementations, the above network device further includes:

[0406] The optimization module 1 120 is configured to optimize the conditional switching configuration according to the successful switching report.

[0407] In some implementations, the signal measurement result of the neighboring cell by the terminal device includes: the signal measurement result of the neighboring cell by the terminal device before the conditional switching is performed, or before the conditional switching is completed, or before the signal measurement result of at least one candidate cell satisfies the switching condition;

[0408] The signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions include: the signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions before the conditional switching is performed, or before the conditional switching is completed, or before the signal measurement results of at least one candidate cell meet the switching conditions.

[0409] In some implementations, the optimization module 1120 is used to:

[0410] Access resources of candidate cells that do not need to be configured with CHO are reduced for the first terminal, where the first terminal is a terminal device that has a similar moving trajectory to the terminal device and / or reports a similar measurement report.

[0411] In some implementations, the optimization module 1120 reduces access resources of candidate cells that do not need to be configured with CHO according to at least one of the following:

[0412] Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions;

[0413] A list of candidate cells that meet the switching conditions;

[0414] A list of candidate cells that do not meet the switching conditions;

[0415] In some implementations, the optimization module 1120 is used to:

[0416] It is necessary to additionally configure access resources of candidate cells of CHO for the first terminal, where the first terminal is a terminal device having a similar moving trajectory to the terminal device and / or reporting a similar measurement report.

[0417] In some implementations, the optimization module 1120 increases access resources of candidate cells for which additional CHO configuration is necessary based on the signal measurement result of the terminal device on the neighboring cells.

[0418] In some implementations, the optimization module 1120 is used to:

[0419] If RLF occurs in the source cell before the terminal device executes CHO, and the time length from receiving the CHO configuration to triggering the CHO is equal to or exceeds the time length threshold, the CHO condition of the target cell is adjusted for the first terminal; the first terminal is a terminal device that has a similar mobile trajectory to the terminal device and / or reports a similar measurement report.

[0420] In some implementations, the optimization module 1120 adjusts the CHO condition of the target cell to be easier to satisfy.

[0421] In some implementations, the optimization module 1 120 determines the adjustment amplitude according to the signal measurement result of the terminal device on the source cell when the RLF occurs.

[0422] In some implementations, the optimization module 1120 is used to:

[0423] The conditional switching start threshold is lowered according to information indicating whether a radio link failure RLF has occurred in the source cell before the terminal device performs CHO and / or the source cell signal measurement amount and / or the measured neighbor cell consumption measurement amount measured before the RLF occurs in the source cell.

[0424] Optionally, the network device is further configured to: negotiate a preferred dedicated resource reservation duration in a subsequent handover request (HO required) signaling according to a time length from receiving the CHO configuration to triggering the CHO.

[0425] It should be understood that the above and other operations and / or functions of the modules in the network device according to the embodiment of the present application are respectively to implement Figure 7The corresponding process of the network device in the method 700 is not repeated here for the sake of brevity.

[0426] Fig.12 It is a schematic structural diagram of a communication device 1200 according to an embodiment of the present application. Fig.12 The communication device 1200 shown includes a processor 1210, and the processor 1210 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0427] Alternatively, if Fig.12 As shown, the communication device 1200 may further include a memory 1220. The processor 1210 may call and run a computer program from the memory 1220 to implement the method in the embodiment of the present application.

[0428] The memory 1220 may be a separate device independent of the processor 1210 , or may be integrated into the processor 1210 .

[0429] Alternatively, if Fig.12 As shown, the communication device 1200 may further include a transceiver 1230, and the processor 1210 may control the transceiver 1230 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.

[0430] The transceiver 1230 may include a transmitter and a receiver. The transceiver 1230 may further include an antenna, and the number of the antennas may be one or more.

[0431] Optionally, the communication device 1200 may be a terminal device of an embodiment of the present application, and the communication device 1200 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application, which will not be described again for the sake of brevity.

[0432] Optionally, the communication device 1200 may be a network device of an embodiment of the present application, and the communication device 1200 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which will not be described again for the sake of brevity.

[0433] Fig.13 is a schematic structural diagram of a chip 1300 according to an embodiment of the present application. Fig.13 The chip 1300 shown includes a processor 1310, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0434] Alternatively, if Fig.13As shown, the chip 1300 may further include a memory 1320. The processor 1310 may call and run a computer program from the memory 1320 to implement the method in the embodiment of the present application.

[0435] The memory 1320 may be a separate device independent of the processor 1310 , or may be integrated into the processor 1310 .

[0436] Optionally, the chip 1300 may further include an input interface 1330. The processor 1310 may control the input interface 1330 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0437] Optionally, the chip 1300 may further include an output interface 1340. The processor 1310 may control the output interface 1340 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0438] Optionally, the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0439] Optionally, the chip can be applied to the network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity, they will not be repeated here.

[0440] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0441] The processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), a field programmable gate array (FPGA), an application specific integrated circuit (ASIC) or other programmable logic devices, transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor mentioned above may be a microprocessor or any conventional processor, etc.

[0442] The memory mentioned above may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM) or a flash memory. The volatile memory may be a random access memory (RAM).

[0443] It should be understood that the above-mentioned memory is exemplary but not restrictive. For example, the memory in the embodiments of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0444] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instruction is loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network or other programmable devices. The computer instruction can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instruction can be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server, a data center, etc. that contains one or more available media integrations. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0445] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0446] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0447] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for sending a successful handover report, applied to a terminal device, comprising: When the conditional handover CHO succeeds, a successful handover report is sent, where the successful handover report includes at least one of the following: Signal measurement results of the terminal device on the candidate cells that do not meet the switching conditions; The length of time from receiving the CHO configuration to triggering the CHO.

2. The method according to claim 1, wherein: The signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions include: the signal measurement results of the terminal device for the candidate cells that do not meet the switching conditions before the conditional switching is performed, or before the conditional switching is completed, or before the signal measurement results of at least one candidate cell meet the switching activation conditions.

3. The method according to claim 1, wherein sending a successful handover report comprises: The terminal device sends a first RRC signaling or a media access control MAC control unit CE, where the first RRC signaling or MAC CE carries information that the terminal device has a successful handover report; Receiving a second RRC signaling or MAC CE, where the second RRC signaling or MAC CE is used to request the terminal device to report a successful handover report; The terminal device sends a third RRC signaling or MAC CE, and the third RRC signaling or MAC CE carries the successful switching report.

4. The method according to claim 3, wherein: The first RRC signaling includes RRC reconfiguration completion RRCReconfigurationComplete signaling.

5. The method according to claim 3, wherein: The second RRC signaling includes an information request InformationRequest.

6. The method according to claim 3, wherein: The third RRC signaling includes an information response InformationResponse.

7. The method according to any one of claims 1 to 6, wherein sending a successful handover report when the conditional handover is successful comprises: Send a successful switch report after the conditional switch is successfully completed.

8. The method according to claim 7, wherein sending a successful handover report comprises: The terminal device starts recording time from the first starting moment, and when the recorded time value is equal to or exceeds the first threshold, sends information that the terminal device has a successful handover report through RRC signaling or MAC signaling; Receiving a message requesting the terminal device to report a successful switching report; A successful handover report is sent via RRC signaling.

9. The method according to claim 8, wherein the first starting time comprises at least one of the following: The time point when the RRC signaling including the conditional reconfiguration is received; The time point when the condition switching starts to be executed; The time point when the conditional switch is completed.

10. According to the method of claim 8, the first threshold is configured by the network device through RRC signaling or maintained by the terminal device.

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