Switching method, device, equipment and readable storage medium

Abstract

This application discloses a handover method, apparatus, device, and readable storage medium, relating to the field of communications technology, to improve handover speed and reduce terminal requirements. The method comprises: receiving auxiliary information sent by a second terminal; and performing handover to a target cell based on the auxiliary information; wherein the auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal. Embodiments of the present application can improve handover speed and reduce terminal requirements.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a switching method, apparatus, device, and readable storage medium. Background Art

[0002] Existing technologies define three terminal states: idle, inactive, and connected. As users become increasingly dependent on their mobile phones, the proportion of terminals in the connected state is increasing. Furthermore, existing technologies also offer enhanced switching capabilities, such as conditional switching and dual protocol stacks.

[0003] However, regardless of the handover scheme, the terminal must initiate a random access procedure in the target cell. Dual-stack protocols require the terminal to have multiple radio channels and multiple protocol stacks, placing higher demands on the terminal. Consequently, existing handover schemes result in slower handover speeds and place higher demands on the terminal. Summary of the Invention

[0004] The embodiments of the present application provide a switching method, apparatus, device, and readable storage medium to increase the switching speed and reduce the requirements on the terminal.

[0005] In a first aspect, an embodiment of the present application provides a handover method, applied to a first terminal, including:

[0006] receiving auxiliary information sent by the second terminal;

[0007] switching to a target cell according to the auxiliary information;

[0008] The auxiliary information includes a TA (Timing Advanced, tracking area) corresponding to the second terminal and an identifier of a cell corresponding to the second terminal.

[0009] The target cell belongs to a cell group of the first terminal; the cell group is established according to a user trajectory of the first terminal, and cells in the cell group share the context of the first terminal.

[0010] Before switching to the target cell according to the auxiliary information, the method further includes:

[0011] Determine the cell group corresponding to the first terminal.

[0012] The determining the cell group corresponding to the first terminal includes:

[0013] Reporting cell information to the network side, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resides or has been connected during a target time period;

[0014] Receive the cell group information and the identifier of the first terminal sent by the network side according to the cell information, where the identifier of the first terminal is used to uniquely identify the first terminal in the cell group.

[0015] The method further comprises:

[0016] Receive first information sent by the network side, where the first information is used to instruct the first terminal to receive time domain location information and / or frequency domain location information of the auxiliary information.

[0017] The method further comprises:

[0018] receiving second information sent by the network side, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information:

[0019] Transmit power;

[0020] Sending time domain location information of the auxiliary information;

[0021] The frequency domain location information of the auxiliary information is sent.

[0022] The time domain location information includes at least one of the following: a period, a time domain duration, and an offset value;

[0023] The sending of the auxiliary information satisfies any of the following conditions:

[0024] After or before the SSB (Synchronization Signal and PBCH block) is sent or within the sending window;

[0025] After or before the SMTC (SS / PBCH Block Measurement Time Configuration) is sent or within the sending window;

[0026] After or before the measurement reference symbol is sent or within the sending window;

[0027] During the uplink calibration gap.

[0028] The frequency domain location information satisfies any of the following conditions:

[0029] The frequency domain position completely or partially overlaps with that of SSB;

[0030] The frequency domain position of the measurement reference symbol is fully or partially overlapped.

[0031] The switching to the target cell according to the auxiliary information includes:

[0032] When it is determined according to the auxiliary information that the measurement result of the first cell corresponding to the cell identifier meets the first preset requirement, uplink data and the identifier of the first terminal are sent to the target cell using the TA.

[0033] The sending uplink data and the identifier of the first terminal to the target cell by using the TA includes:

[0034] When it is determined according to the auxiliary information that the first cell corresponding to the cell identifier and the first terminal are located in the same cell group and the measurement result of the first cell meets the first preset requirement, uplink data and the identifier of the first terminal are sent to the target cell using the TA.

[0035] The sending uplink data and the identifier of the first terminal to the target cell by using the TA includes:

[0036] receiving resource configuration information sent by the network side, where the resource configuration information indicates time domain resource information and / or frequency domain resource information used by the first terminal when switching to the target cell;

[0037] According to the resource configuration information, uplink data and the identifier of the first terminal are sent to the target cell using the TA.

[0038] The sending uplink data and the identifier of the first terminal to the target cell by using the TA includes:

[0039] The uplink data and the identifier of the first terminal are sent to the target cell using the TA by utilizing the initial bandwidth portion or the reserved uplink resources.

[0040] The method further comprises any one of the following steps:

[0041] sending an identifier of a source cell to the target cell, so that the target cell obtains data of the first terminal from the source cell;

[0042] Sending an identifier of the target cell to a source cell, so that the source cell activates the target cell and sends data of the first terminal to the target cell;

[0043] Receive a handover configuration event sent by the network side, and when it is determined that the handover configuration event is met, send the data of the first terminal to the target cell.

[0044] In a second aspect, an embodiment of the present application further provides a handover method, applied to a second terminal, comprising:

[0045] Sending first auxiliary information to a first terminal, where the first auxiliary information is used to enable the first terminal to switch to a target cell according to the auxiliary information;

[0046] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0047] The method further comprises:

[0048] Second auxiliary information sent by a third terminal is received, where the second auxiliary information includes an identifier of a TA corresponding to the third terminal and a cell corresponding to the third terminal.

[0049] In a third aspect, an embodiment of the present application further provides a switching method, applied to a network device, comprising:

[0050] Receiving cell information reported by the first terminal, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resides or has been connected within a target time period;

[0051] sending, according to the cell information, cell group information and an identifier of the first terminal to the first terminal, so that when the first terminal receives the auxiliary information of the second terminal, it switches to a target cell according to the auxiliary information;

[0052] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0053] The method further comprises:

[0054] First information is sent to the first terminal, where the first information is used to instruct the first terminal to receive time domain location information and / or frequency domain location information of the auxiliary information.

[0055] The method further comprises:

[0056] Sending second information to the first terminal, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information:

[0057] Transmit power;

[0058] Sending time domain location information of the auxiliary information;

[0059] The frequency domain location information of the auxiliary information is sent.

[0060] The time domain location information includes at least one of the following: a period, a time domain duration, and an offset value;

[0061] The sending of the auxiliary information satisfies any of the following conditions:

[0062] After or before SSB is sent or within the sending window;

[0063] After or before SMTC is sent or within the sending window;

[0064] After or before the measurement reference symbol is sent or within the sending window;

[0065] During the uplink calibration gap.

[0066] The frequency domain location information satisfies any of the following conditions:

[0067] The frequency domain position completely or partially overlaps with that of SSB;

[0068] The frequency domain position of the measurement reference symbol is fully or partially overlapped.

[0069] The method further comprises:

[0070] The second message is sent to the second cell, so that the second cell determines the first information of other cells and sends the first information to the terminal in the second cell.

[0071] The method further comprises:

[0072] Resource configuration information is sent to the first terminal, so that the first terminal sends uplink data and an identifier of the first terminal to the target cell using the TA according to the resource configuration information.

[0073] The method further comprises any one of the following steps:

[0074] receiving an identifier of the target cell sent by the first terminal, activating the target cell, and sending data of the first terminal to the target cell;

[0075] sending a handover configuration event to the first terminal, so that the first terminal sends data of the first terminal to the target cell when determining that the handover configuration event is satisfied;

[0076] Receive a measurement result or event sent by the first terminal, activate the target cell according to the measurement result or event, and send data of the first terminal to the target cell.

[0077] In a fourth aspect, an embodiment of the present application further provides a switching device, applied to a first terminal, comprising:

[0078] A first receiving module, configured to receive auxiliary information sent by a second terminal;

[0079] A handover module, configured to perform handover to a target cell according to the auxiliary information;

[0080] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0081] The target cell belongs to a cell group of the first terminal; the cell group is established according to a user trajectory of the first terminal, and cells in the cell group share the context of the first terminal.

[0082] Wherein, the device further includes:

[0083] The first determining module is used to determine the cell group corresponding to the first terminal.

[0084] The first determining module includes:

[0085] A first reporting submodule, configured to report cell information to the network side, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resides or has been connected within a target time period;

[0086] The first receiving submodule is configured to receive the cell group information and the identifier of the first terminal sent by the network side according to the cell information, where the identifier of the first terminal is used to uniquely identify the first terminal within the cell group.

[0087] Wherein, the device further includes:

[0088] The second receiving module is used to receive first information sent by the network side, where the first information is used to instruct the first terminal to receive the time domain location information and / or frequency domain location information of the auxiliary information.

[0089] Wherein, the device further includes:

[0090] The third receiving module is configured to receive second information sent by the network side, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information:

[0091] Transmit power;

[0092] Sending time domain location information of the auxiliary information;

[0093] The frequency domain location information of the auxiliary information is sent.

[0094] The time domain location information includes at least one of the following: a period, a time domain duration, and an offset value;

[0095] The sending of the auxiliary information satisfies any of the following conditions:

[0096] After or before SSB is sent or within the sending window;

[0097] After or before SMTC is sent or within the sending window;

[0098] After or before the measurement reference symbol is sent or within the sending window;

[0099] During the uplink calibration gap.

[0100] The frequency domain location information satisfies any of the following conditions:

[0101] The frequency domain position completely or partially overlaps with that of SSB;

[0102] The frequency domain position of the measurement reference symbol is fully or partially overlapped.

[0103] The switching module is configured to send uplink data and the identifier of the first terminal to the target cell using the TA when it is determined according to the auxiliary information that the measurement result of the first cell corresponding to the identifier of the cell meets a first preset requirement.

[0104] Among them, the switching module is used to use the TA to send uplink data and the identifier of the first terminal to the target cell when it is determined according to the auxiliary information that the first cell corresponding to the identifier of the cell and the first terminal are located in the same cell group and the measurement result of the first cell meets the first preset requirement.

[0105] Wherein, the switching module includes:

[0106] a receiving submodule, configured to receive resource configuration information sent by the network side, where the resource configuration information indicates time domain resource information and / or frequency domain resource information used by the first terminal when switching to the target cell;

[0107] The switching submodule is configured to send uplink data and the identifier of the first terminal to the target cell using the TA according to the resource configuration information.

[0108] The switching module is configured to use the TA to send uplink data and the identifier of the first terminal to the target cell using the initial bandwidth portion or the reserved uplink resources.

[0109] The device may further include any one of the following modules:

[0110] a first sending module, configured to send an identifier of a source cell to the target cell, so that the target cell obtains data of the first terminal from the source cell;

[0111] a second sending module, configured to send the identifier of the target cell to the source cell, so that the source cell activates the target cell and sends the data of the first terminal to the target cell;

[0112] The third receiving module is configured to receive a handover configuration event sent by the network side, and send the data of the first terminal to the target cell when it is determined that the handover configuration event is met.

[0113] In a fifth aspect, an embodiment of the present application further provides a switching device, applied to a second terminal, comprising:

[0114] A first sending module, configured to send first auxiliary information to a first terminal, where the first auxiliary information is used to enable the first terminal to switch to a target cell according to the auxiliary information;

[0115] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0116] Wherein, the device further includes:

[0117] The first receiving module is configured to receive second auxiliary information sent by a third terminal, where the second auxiliary information includes an identifier of a TA corresponding to the third terminal and a cell corresponding to the third terminal.

[0118] In a sixth aspect, an embodiment of the present application further provides a switching device, applied to a network device, comprising:

[0119] A first receiving module is configured to receive cell information reported by a first terminal, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resides or has been connected within a target time period;

[0120] a first sending module, configured to send cell group information and an identifier of the first terminal to the first terminal according to the cell information, so that the first terminal performs handover to a target cell according to the auxiliary information when receiving the auxiliary information from the second terminal;

[0121] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0122] Wherein, the device further includes:

[0123] The second sending module is used to send first information to the first terminal, where the first information is used to instruct the first terminal to receive the time domain location information and / or frequency domain location information of the auxiliary information.

[0124] Wherein, the device further includes:

[0125] A third sending module is configured to send second information to the first terminal, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information:

[0126] Transmit power;

[0127] Sending time domain location information of the auxiliary information;

[0128] The frequency domain location information of the auxiliary information is sent.

[0129] The time domain location information includes at least one of the following: a period, a time domain duration, and an offset value;

[0130] The sending of the auxiliary information satisfies any of the following conditions:

[0131] After or before SSB is sent or within the sending window;

[0132] After or before SMTC is sent or within the sending window;

[0133] After or before the measurement reference symbol is sent or within the sending window;

[0134] During the uplink calibration gap.

[0135] The frequency domain location information satisfies any of the following conditions:

[0136] The frequency domain position completely or partially overlaps with that of SSB;

[0137] The frequency domain position of the measurement reference symbol is fully or partially overlapped.

[0138] Wherein, the device further includes:

[0139] The fourth sending module is used to send the second message to the second cell, so that the second cell can determine the first information of other cells and send the first information to the terminal in the second cell.

[0140] Wherein, the device further includes:

[0141] The second receiving module is used to send resource configuration information to the first terminal, so that the first terminal uses the TA to send uplink data and the identifier of the first terminal to the target cell according to the resource configuration information.

[0142] The device further comprises any one of the following modules:

[0143] a third receiving module, configured to receive an identifier of the target cell sent by the first terminal, activate the target cell, and send data of the first terminal to the target cell;

[0144] a fifth sending module, configured to send a handover configuration event to the first terminal, so that the first terminal sends data of the first terminal to the target cell when determining that the handover configuration event is satisfied;

[0145] The fourth receiving module is configured to receive a measurement result or event sent by the first terminal, activate the target cell according to the measurement result or event, and send data of the first terminal to the target cell.

[0146] In a seventh aspect, an embodiment of the present application further provides a switching device, applied to a first terminal, comprising: a processor and a transceiver;

[0147] The transceiver is configured to receive auxiliary information sent by the second terminal;

[0148] The processor is configured to perform handover to a target cell according to the auxiliary information;

[0149] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0150] The target cell belongs to a cell group of the first terminal; the cell group is established according to a user trajectory of the first terminal, and cells in the cell group share the context of the first terminal.

[0151] The processor is configured to determine a cell group corresponding to the first terminal.

[0152] Among them, the transceiver is used to report cell information to the network side, wherein the cell information includes the identifier and timestamp of the cell where the first terminal resides or has been connected during the target time period; and receive the cell group information and the identifier of the first terminal sent by the network side based on the cell information, and the identifier of the first terminal is used to uniquely identify the first terminal within the cell group.

[0153] The transceiver is used to receive first information sent by the network side, and the first information is used to instruct the first terminal to receive the time domain location information and / or frequency domain location information of the auxiliary information.

[0154] The transceiver is configured to receive second information sent by a network side, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information:

[0155] Transmit power;

[0156] Sending time domain location information of the auxiliary information;

[0157] The frequency domain location information of the auxiliary information is sent.

[0158] The time domain location information includes at least one of the following: a period, a time domain duration, and an offset value;

[0159] The sending of the auxiliary information satisfies any of the following conditions:

[0160] After or before SSB is sent or within the sending window;

[0161] After or before SMTC is sent or within the sending window;

[0162] After or before the measurement reference symbol is sent or within the sending window;

[0163] During the uplink calibration gap.

[0164] The frequency domain location information satisfies any of the following conditions:

[0165] The frequency domain position completely or partially overlaps with that of SSB;

[0166] The frequency domain position of the measurement reference symbol is fully or partially overlapped.

[0167] The processor is configured to send uplink data and the identifier of the first terminal to the target cell using the TA when it is determined according to the auxiliary information that the measurement result of the first cell corresponding to the identifier of the cell meets a first preset requirement.

[0168] The processor is configured to use the TA to send uplink data and the identifier of the first terminal to the target cell when it is determined according to the auxiliary information that the first cell corresponding to the identifier of the cell and the first terminal are located in the same cell group and the measurement result of the first cell meets the first preset requirement.

[0169] Among them, the processor is used to receive resource configuration information sent by the network side, and the resource configuration information indicates the time domain resource information and / or frequency domain resource information used by the first terminal when switching to the target cell; according to the resource configuration information, the TA is used to send uplink data and the identifier of the first terminal to the target cell.

[0170] The processor is configured to use the TA to send uplink data and the identifier of the first terminal to the target cell using the initial bandwidth portion or the reserved uplink resources.

[0171] The transceiver is further configured to perform any one of the following steps:

[0172] sending an identifier of a source cell to the target cell, so that the target cell obtains data of the first terminal from the source cell;

[0173] Sending an identifier of the target cell to a source cell, so that the source cell activates the target cell and sends data of the first terminal to the target cell;

[0174] Receive a handover configuration event sent by the network side, and when it is determined that the handover configuration event is met, send the data of the first terminal to the target cell.

[0175] In an eighth aspect, an embodiment of the present application further provides a switching device, applied to a second terminal, comprising: a processor and a transceiver;

[0176] The transceiver is configured to send first auxiliary information to the first terminal, where the first auxiliary information is used to enable the first terminal to switch to a target cell according to the auxiliary information;

[0177] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0178] The transceiver is further configured to receive second auxiliary information sent by a third terminal, where the second auxiliary information includes an identifier of a TA corresponding to the third terminal and a cell corresponding to the third terminal.

[0179] In a ninth aspect, an embodiment of the present application further provides a switching device, applied to a network device, comprising: a processor and a transceiver;

[0180] The transceiver is configured to receive cell information reported by a first terminal, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resides or has been connected during a target time period; and send cell group information and the identifier of the first terminal to the first terminal based on the cell information, so that the first terminal performs handover to the target cell based on the auxiliary information when receiving the auxiliary information from the second terminal;

[0181] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0182] The transceiver is configured to send first information to the first terminal, where the first information is used to instruct the first terminal to receive time domain location information and / or frequency domain location information of the auxiliary information.

[0183] The transceiver is configured to send second information to the first terminal, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information:

[0184] Transmit power;

[0185] Sending time domain location information of the auxiliary information;

[0186] The frequency domain location information of the auxiliary information is sent.

[0187] The time domain location information includes at least one of the following: a period, a time domain duration, and an offset value;

[0188] The sending of the auxiliary information satisfies any of the following conditions:

[0189] After or before SSB is sent or within the sending window;

[0190] After or before SMTC is sent or within the sending window;

[0191] After or before the measurement reference symbol is sent or within the sending window;

[0192] During the uplink calibration gap.

[0193] The frequency domain location information satisfies any of the following conditions:

[0194] The frequency domain position completely or partially overlaps with that of SSB;

[0195] The frequency domain position of the measurement reference symbol is fully or partially overlapped.

[0196] The transceiver is configured to send the second message to the second cell, so that the second cell can determine the first information of other cells and send the first information to the terminal in the second cell.

[0197] The transceiver is configured to send resource configuration information to the first terminal, so that the first terminal sends uplink data and an identifier of the first terminal to a target cell using the TA according to the resource configuration information.

[0198] The transceiver is configured to perform any one of the following steps:

[0199] receiving an identifier of the target cell sent by the first terminal, activating the target cell, and sending data of the first terminal to the target cell;

[0200] sending a handover configuration event to the first terminal, so that the first terminal sends data of the first terminal to the target cell when determining that the handover configuration event is satisfied;

[0201] Receive a measurement result or event sent by the first terminal, activate the target cell according to the measurement result or event, and send data of the first terminal to the target cell.

[0202] In the tenth aspect, an embodiment of the present application also provides a communication device, including: a transceiver, a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor implements the steps in the switching method described above when executing the program.

[0203] In the eleventh aspect, an embodiment of the present application further provides a readable storage medium, on which a program is stored, and when the program is executed by a processor, the steps in the switching method described above are implemented.

[0204] In an embodiment of the present application, when a first terminal receives auxiliary information from a second terminal in the same cell group, it can switch to the target cell based on the auxiliary information. The cell group is established based on the user trajectory of the first terminal, and the cells within the cell group share the context of the first terminal. Therefore, compared with the prior art, the solution of the embodiment of the present application eliminates the need for a random access process during handover, thereby speeding up the handover process. It also eliminates the need for hardware improvements to the terminal and reduces the requirements for the terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0205] Figure 1 This is one of the flow charts of the switching method provided in the embodiment of the present application;

[0206] Figure 2 This is the second flowchart of the switching method provided in the embodiment of the present application;

[0207] Figure 3 This is the third flow chart of the switching method provided in the embodiment of the present application;

[0208] Figure 4 This is a schematic diagram of the time slot configuration provided by an embodiment of the present application;

[0209] Figure 5 This is one of the structural diagrams of the switching device provided in the embodiment of the present application;

[0210] Figure 6 This is the second structural diagram of the switching device provided in the embodiment of the present application;

[0211] Figure 7 This is the third structural diagram of the switching device provided in the embodiment of the present application;

[0212] Figure 8 This is the fourth structural diagram of the switching device provided in the embodiment of the present application;

[0213] Figure 9 This is the fifth structural diagram of the switching device provided in the embodiment of the present application;

[0214] Figure 10 This is the sixth structural diagram of the switching device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0215] In the embodiments of this application, the term "and / or" describes the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0216] In the embodiments of the present application, the term "plurality" refers to two or more than two, and other quantifiers are similar.

[0217] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0218] See also Figure 1 , Figure 1 This is a flow chart of a switching method provided in an embodiment of the present application, which is applied to a first terminal. Figure 1 As shown, the following steps are included:

[0219] Step 101: Receive auxiliary information sent by a second terminal.

[0220] The auxiliary information includes an identifier of a TA corresponding to the second terminal and a cell corresponding to the second terminal. The second terminal is a terminal in a connected state.

[0221] Step 102: Handover to the target cell according to the auxiliary information.

[0222] The target cell belongs to a cell group of the first terminal, the cell group is established according to a user trajectory of the first terminal, and cells in the cell group share a context of the first terminal.

[0223] After obtaining the auxiliary information, the first terminal may switch to the target cell according to the auxiliary information. In the embodiment of the present application, the switching performed according to the auxiliary information may be referred to as a fast switching. If the fast switching is unsuccessful, the first terminal may switch according to a traditional switching method.

[0224] Specifically, when it is determined based on the auxiliary information that the measurement result of the first cell corresponding to the identifier of the cell meets a first preset requirement, uplink data and the identifier of the first terminal are sent to the target cell using the TA. For example, the first preset requirement may be that the signal quality (RSRP (Reference Signal Received Power) / RSRQ (Reference Signal Received Quality) / SINR (Signal to Interference plus Noise Ratio)) of the first cell is higher than a preset threshold, or, for example, the first preset requirement may be that the signal quality (RSRP / RSRQ / SINR) of the first cell is better than a threshold value of the signal quality of the serving cell. If neither the TA nor the cell ID / PCI in the auxiliary information obtained by the first terminal meets the first preset requirement, for example, the cell ID / PCI indicates that the first cell is a serving cell but not a neighboring cell (a handover-capable cell), or the measurement result of the neighboring cell does not meet the threshold, the first terminal performs handover in a traditional manner.

[0225] Optionally, in order to further improve the switching speed, in an embodiment of the present application, when it is determined based on the auxiliary information that the first cell corresponding to the identifier of the cell and the first terminal are in the same cell group and the measurement result of the first cell meets the first preset requirement, the TA is used to send uplink data and the identifier of the first terminal to the target cell. For example, the first terminal can first determine whether the neighboring cell belongs to the cell group of the first terminal, so as to determine whether to perform a fast switch. If the neighboring cell does not belong to the cell group of the first terminal, the first terminal needs to use the traditional method to switch; if the neighboring cell belongs to the cell group of the first terminal, the first terminal determines whether the neighboring cell meets the conditions for fast switching based on the measurement results. When the measurement result of the first cell meets the first preset requirement, the first terminal uses the TA to send uplink data and the identifier of the first terminal to the target cell, otherwise the first terminal needs to use the traditional method to switch.

[0226] To ensure the success of the handover, in an embodiment of the present application, the first terminal may receive resource configuration information sent by the network side, where the resource configuration information indicates the time domain resource information and / or frequency domain resource information used by the first terminal when handing over to the target cell, and based on the resource configuration information, use the TA to send uplink data and the identifier of the first terminal to the target cell. Alternatively, the first terminal uses the initial bandwidth part (initial BWP (Bandwidth Part)) or the reserved uplink resources, and uses the TA to send uplink data and the identifier of the first terminal to the target cell.

[0227] On the basis of the above embodiment, in order to further improve the switching speed, before sending uplink data to the target cell, the first terminal may also send the source cell identifier (cell ID or PCI) to the target cell, so that the target cell obtains the data of the first terminal from the source cell. Alternatively, before sending uplink data to the target cell, the first terminal may also send the target cell identifier to the source cell, so that the source cell activates the target cell and sends the data of the first terminal to the target cell. Alternatively, the first terminal may also receive a switching configuration event sent by the network side, and when it is determined that the switching configuration event is met, activate the target cell and send the data of the first terminal to the target cell. The switching configuration event may, for example, trigger switching when the signal quality of the neighboring cell is higher than the signal quality of the serving cell by a certain threshold.

[0228] Correspondingly, in the embodiment of the present application, the cell group corresponding to the first terminal may also be determined in advance.

[0229] Specifically, the first terminal may report cell information to the network side based on the configuration or pre-configuration information of the network side, wherein the cell information includes an identifier (ID) and a timestamp of the cell in which the first terminal resided or connected during the target time period, wherein the timestamp is used to indicate the time information of the first terminal residing or connecting in the cell. Optionally, the cell information may also include the PCI (Physical Cell Identifier) ​​of the cell in which the first terminal resided or connected during the target time period.

[0230] The network-side configuration may be configuring the terminal to record cell information, where the cell information is information about cells in which the terminal resides or has been connected within a target time period. The target time period may be set as needed or specified by the network. After the network determines the cell group, the first terminal may receive the cell group information and the first terminal's identifier (UE ID) sent by the network based on the cell information. The first terminal's identifier is used to uniquely identify the first terminal within the cell group.

[0231] For example, the network side may group cells based on the cell information reported by the first terminal. The network side may be a base station or a network management system. If the network management system groups the cells, then after grouping the cells, the network management system sends the cell grouping information to the base station and the first terminal. Specifically, the network side may group the cells in which the first terminal resided or connected in a day into a group; the network side may also group the cells in which the first terminal resided or connected in different time periods of the day based on the information of the cells in which the terminal resided or connected in different time periods. The cells within a cell group share the context of the first terminal, that is, all cells within a cell group store the context of the first terminal.

[0232] From the above description, it can be seen that in an embodiment of the present application, when a first terminal receives auxiliary information from a second terminal in the same cell group, it can switch to the target cell based on the auxiliary information. The cell group is established based on the user trajectory of the first terminal, and the cells in the cell group share the context of the first terminal. Therefore, compared with the prior art, the solution of the embodiment of the present application does not require a random access process when switching, thereby speeding up the switching speed, and does not require hardware improvements to the terminal, which also reduces the requirements for the terminal.

[0233] Based on the above embodiment, optionally, the first terminal may receive first information (or auxiliary information reception information) sent by the network side, where the first information is used to instruct the first terminal to receive time domain location information and / or frequency domain location information of the auxiliary information. The first information may be different for different frequencies and / or cells.

[0234] The time domain position information includes at least one of the following: a period, a time domain duration, an offset value (OFFSET); it can be sent after or before the synchronization signal / physical broadcast channel signal block SSB is sent or within the sending window, or after or before the SMTC is sent or within the sending window, or after or before the measurement reference symbol is sent or within the sending window, or during the uplink calibration gap (UL calibration gap).

[0235] Based on the above embodiment, optionally, the first terminal may receive second information (or called auxiliary information sending information) sent by the network side, and the second information is used to indicate to the first terminal at least one of the following information of sending the auxiliary information: transmission power; time domain location information of sending the auxiliary information; frequency domain location information of sending the auxiliary information.

[0236] The transmit power can be set relatively low to ensure that surrounding terminals can receive it, thereby avoiding interference. The frequency domain position information satisfies any of the following conditions: complete or partial overlap with the frequency domain position of the SSB; complete or partial overlap with the frequency domain position of the measurement reference symbol. In this way, the first terminal can obtain auxiliary information during measurement without opening an additional radio frequency channel. In addition, in addition to indicating the frequency domain position of the auxiliary information by indicating the positional relationship with other symbols, the second information can also directly indicate the frequency domain position of the auxiliary information.

[0237] In the above process, if the terminal fails to send an uplink message to the target cell, that is, if no feedback is received within a predetermined time, the terminal performs handover using a traditional method.

[0238] See also Figure 2 , Figure 2 This is a flow chart of the switching method provided in an embodiment of the present application, which is applied to the second terminal. Figure 2 As shown, the following steps are included:

[0239] Step 201: Send first auxiliary information to a first terminal, where the first auxiliary information is used to enable the first terminal to switch to a target cell according to the auxiliary information;

[0240] The auxiliary information includes the TA corresponding to the second terminal and the identifier (cell ID or PCI) of the cell corresponding to the second terminal. The target cell belongs to the cell group of the first terminal; the cell group is established based on the user trajectory of the first terminal, and the cells in the cell group share the context of the first terminal.

[0241] The process for determining the cell group may refer to the description of the preceding embodiment. Furthermore, the second terminal may also receive auxiliary information sent by a third terminal. The second auxiliary information includes the TA corresponding to the third terminal and the identifier of the cell corresponding to the third terminal. Accordingly, the second terminal may also receive the first information or the second information, and the processing and meaning thereof are the same as those described in the preceding embodiment.

[0242] In an embodiment of the present application, when a first terminal receives auxiliary information from a second terminal in the same cell group, it can switch to the target cell based on the auxiliary information. The cell group is established based on the user trajectory of the first terminal, and the cells within the cell group share the context of the first terminal. Therefore, compared with the prior art, the solution of the embodiment of the present application eliminates the need for a random access process during handover, thereby speeding up the handover process. It also eliminates the need for hardware improvements to the terminal and reduces the requirements for the terminal.

[0243] See also Figure 3 , Figure 3 This is a flow chart of a switching method provided in an embodiment of the present application, which is applied to a network device, such as Figure 3 As shown, the following steps are included:

[0244] Step 301: Receive cell information reported by a first terminal, wherein the cell information includes identifiers and timestamps of cells where the first terminal resides or has been connected within a target time period.

[0245] Step 302: Send cell group information and the identifier of the first terminal to the first terminal according to the cell information, so that the first terminal switches to a target cell according to the auxiliary information when receiving the auxiliary information from the second terminal.

[0246] The auxiliary information includes the identifier of the TA corresponding to the second terminal and the cell corresponding to the second terminal; the target cell belongs to the cell group of the first terminal; the cell group is established based on the user trajectory of the first terminal, and the cells within the cell group share the context of the first terminal. The identifier of the first terminal is used to uniquely identify the first terminal within the cell group, and the cells within the cell group share the context of the first terminal.

[0247] For example, the network device may send configuration information to the first terminal, requiring the first terminal to record cell information, where the cell information is the information of the cells where the terminal resides or has been connected during the target time period. Afterwards, the network device may group the cells according to the cell information reported by the first terminal. The network device may be a base station or a network manager. If the network manager performs the cell grouping, then after grouping the cells, the network manager sends the cell grouping information to the base station and the first terminal. Specifically, the network side may group the cells where the first terminal resides or has been connected within a day into a group; the network device may also group the cells where the first terminal resides or has been connected according to different time periods based on the information of the cells where the terminal resides or has been connected during different time periods within a day. The cells within a cell group share the context of the first terminal, that is, the cells within a cell group all store the context of the first terminal.

[0248] Based on the above embodiment, optionally, to ensure handover speed, the network device may further send first information to the first terminal, the first information instructing the first terminal to receive time domain location information and / or frequency domain location information of the auxiliary information. Optionally, the network device may further send second information to the first terminal, the second information instructing the first terminal to send at least one of the following items of auxiliary information: transmit power; time domain location information for sending the auxiliary information; or frequency domain location information for sending the auxiliary information. The meaning of the information included in the first and second information may refer to the description of the above embodiment.

[0249] Based on the above embodiment, optionally, the network device may further send resource configuration information to the first terminal, so that the first terminal uses the TA to send uplink data and the identifier of the first terminal to the target cell according to the resource configuration information.

[0250] In addition, to further improve the handover rate, the network device may optionally receive an identifier of the target cell sent by the first terminal, activate the target cell, and send the first terminal's data to the target cell. The identifier of the target cell may be a cell ID or PCI, etc. Optionally, the network device may also send a handover configuration event to the first terminal, causing the first terminal to send the first terminal's data to the target cell when determining that the handover configuration event is met. Optionally, the network device may also receive a measurement result or event sent by the first terminal, and activate the target cell based on the measurement result or event, and send the first terminal's data to the target cell.

[0251] Based on the above embodiment, the network device may optionally further send the second message to a second cell, so that the second cell can determine the first information of other cells and send the first information to terminals within the second cell. That is, in this embodiment of the present application, cells can exchange auxiliary information transmission information to determine auxiliary information reception information of other frequencies / cells, and then send the information to the terminal, allowing the terminal to receive the auxiliary information sent by the neighboring cell.

[0252] In an embodiment of the present application, when a first terminal receives auxiliary information from a second terminal in the same cell group, it can switch to the target cell based on the auxiliary information. The cell group is established based on the user trajectory of the first terminal, and the cells within the cell group share the context of the first terminal. Therefore, compared with the prior art, the solution of the embodiment of the present application eliminates the need for a random access process during handover, thereby speeding up the handover process. It also eliminates the need for hardware improvements to the terminal and reduces the requirements for the terminal.

[0253] Hereinafter, how to send the auxiliary information will be described in conjunction with specific embodiments.

[0254] Assume that the subcarrier spacing of the cell is 30KHz and 8 SSBs are sent. Figure 4 As shown in Figure 1, four DL slots (downlink time slots) are required to transmit all eight SSBs. Assuming the uplink and downlink time slot ratio of a TDD (Time Division Multiplexing) system is DDDSU (2.5ms period), then all four DDDSU slots must be used to transmit all eight SSBs.

[0255] Regarding the time domain transmission location of the auxiliary information, in the above case, the cell can configure the terminal to send the auxiliary information in the last few UL symbols of the 5th UL slot or the 4th slot. The specific configuration methods can be as follows:

[0256] a) The cell configures the terminal to send auxiliary information in the Nth slot within each SSB transmission cycle;

[0257] b) The cell configures the terminal to send auxiliary information in the Nth slot of each SSB transmission cycle, and the duration of the auxiliary information transmission is X;

[0258] c) The cell configures the terminal to send auxiliary information in the Mth symbol of the Nth slot in each SSB transmission cycle, and the auxiliary information transmission duration is X.

[0259] In the above three modes, there is no need to configure the period, and the sending period of the auxiliary information and the SSB sending period can be kept consistent.

[0260] d) The cell configures the terminal to send auxiliary information period T, duration D and offset value Offset. Specifically, the symbol position of the auxiliary information can be calculated in the following way, and then combined with the duration D, the transmission duration can be obtained:

[0261] SFN mod T=FLOOR(Offset / 140);

[0262] symbol=Offset mod 140.

[0263] Wherein, SFN (System Frame Number) is the system frame number, T represents the period for sending auxiliary information, Offset represents the offset value, and symbol represents the symbol position for sending the auxiliary information.

[0264] The above-mentioned method d) can be applied to various scenarios, such as a scenario in which auxiliary information is sent using a UL calibration gap, or a scenario in which SSB transmission gaps are used for transmission, or a scenario in which other reference symbol transmission gaps are used for transmission, etc.

[0265] Regarding the frequency domain transmission location of the auxiliary information, in the above case, it can be configured as follows:

[0266] a) The frequency domain transmission position and the SSB position completely or partially overlap, and partial overlap means that it is included in the SSB frequency domain position;

[0267] b) The frequency domain transmission position and the position of the measurement reference symbol completely overlap or partially overlap, and partial overlap means that it is included in the frequency domain position of the measurement reference symbol;

[0268] c) Sending auxiliary information frequency domain location information. For example, the frequency domain location information may be indicated by indicating the center frequency and occupied PRB (Physical Resource Block) information.

[0269] For the sending of auxiliary information, each cell sends auxiliary information sending information (i.e., the second information above) for each terminal (UE specific) according to the capabilities of the terminal, such as whether it supports sending auxiliary information, terminal transmission power, etc. For the reception of auxiliary information, the cell configures per frequency (based on frequency) or per cell (based on cell) or per case (based on scenario) auxiliary information receiving information (i.e., the first information above) for the UE based on the configured auxiliary information sending information and the received auxiliary information sending information of the neighboring cell. The per case refers to whether a measurement interval is required, whether an interruption is required, or whether an adjustment of the radio frequency channel is required, etc. The content of the auxiliary information reception information is similar to the content of the auxiliary information sending information, the time domain information includes one or more of period, offset, and duration, and the frequency domain information includes frequency information of auxiliary information reception.

[0270] After receiving the auxiliary information reception information of the neighboring cell / frequency configured by the network, the terminal can start detecting the auxiliary information at the corresponding time-frequency position. The terminal receives the decision information (such as decision event, decision threshold, etc.) for fast switching configured by the network side. For example, the decision information can be that when the signal strength / quality of the neighboring cell is higher than a certain threshold of the serving cell, a fast switching is triggered.

[0271] The terminal makes a judgment based on the received auxiliary information. If the terminal determines that a cell in the auxiliary information meets the judgment conditions for fast switching, for example, the signal strength / quality of neighboring cell 2 is higher than that of serving cell 1 and meets the fast switching threshold, and the terminal detects that the auxiliary information sent by the surrounding connected terminals contains neighboring cell 2, the terminal triggers fast switching. At this time, the terminal uses the TA obtained from the auxiliary information for uplink transmission, and sends its own UE ID to neighboring cell 2, and informs neighboring cell 2 of the cell information of the source cell, that is, the source cell is cell 1. After neighboring cell 2 receives the uplink data of the terminal, it knows that this terminal is a fast switching terminal by detecting the UE ID, and the source cell is cell 1. Therefore, neighboring cell 2 obtains the terminal data from cell 1 and completes the switching. The cell information can be a cell ID or PCI. If the terminal fails to send uplink to neighboring cell 2, that is, no feedback is received within the predetermined time, the terminal uses the traditional method to switch.

[0272] It can be seen from the above description that the solution of the embodiment of the present application can save the random access process, thereby achieving faster switching, and has no additional hardware requirements for the terminal.

[0273] The embodiment of the present application also provides a switching device, which is applied to the first terminal. Figure 5 As shown, the switching device 500 includes:

[0274] A first receiving module 501 is configured to receive auxiliary information sent by a second terminal; a switching module 502 is configured to switch to a target cell according to the auxiliary information;

[0275] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0276] The target cell belongs to a cell group of the first terminal; the cell group is established according to a user trajectory of the first terminal, and cells in the cell group share the context of the first terminal.

[0277] Wherein, the device further includes:

[0278] The first determining module is used to determine the cell group corresponding to the first terminal.

[0279] The first determining module includes:

[0280] A first reporting submodule, configured to report cell information to the network side, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resides or has been connected within a target time period;

[0281] The first receiving submodule is configured to receive the cell group information and the identifier of the first terminal sent by the network side according to the cell information, where the identifier of the first terminal is used to uniquely identify the first terminal within the cell group.

[0282] The cell information also includes: PCI.

[0283] Wherein, the device further includes:

[0284] The second receiving module is used to receive first information sent by the network side, where the first information is used to instruct the first terminal to receive the time domain location information and / or frequency domain location information of the auxiliary information.

[0285] Wherein, the device further includes:

[0286] The third receiving module is configured to receive second information sent by the network side, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information:

[0287] Transmit power;

[0288] Sending time domain location information of the auxiliary information;

[0289] The frequency domain location information of the auxiliary information is sent.

[0290] The time domain location information includes at least one of the following: a period, a time domain duration, and an offset value;

[0291] The sending of the auxiliary information satisfies any of the following conditions:

[0292] After or before SSB is sent or within the sending window;

[0293] After or before SMTC is sent or within the sending window;

[0294] After or before the measurement reference symbol is sent or within the sending window;

[0295] During the uplink calibration gap.

[0296] The frequency domain location information satisfies any of the following conditions:

[0297] The frequency domain position completely or partially overlaps with that of SSB;

[0298] The frequency domain position of the measurement reference symbol is fully or partially overlapped.

[0299] The switching module is configured to send uplink data and the identifier of the first terminal to the target cell using the TA when it is determined according to the auxiliary information that the measurement result of the first cell corresponding to the identifier of the cell meets a first preset requirement.

[0300] Among them, the switching module is used to use the TA to send uplink data and the identifier of the first terminal to the target cell when it is determined according to the auxiliary information that the first cell corresponding to the identifier of the cell and the first terminal are located in the same cell group and the measurement result of the first cell meets the first preset requirement.

[0301] Wherein, the switching module includes:

[0302] a receiving submodule, configured to receive resource configuration information sent by the network side, where the resource configuration information indicates time domain resource information and / or frequency domain resource information used by the first terminal when switching to the target cell;

[0303] The switching submodule is configured to send uplink data and the identifier of the first terminal to the target cell using the TA according to the resource configuration information.

[0304] The switching module is configured to use the TA to send uplink data and the identifier of the first terminal to the target cell using the initial bandwidth portion or the reserved uplink resources.

[0305] The device may further include any one of the following modules:

[0306] a first sending module, configured to send an identifier of a source cell to the target cell, so that the target cell obtains data of the first terminal from the source cell;

[0307] A second sending module, configured to send the identifier of the target cell to the source cell, so that the source cell activates the target cell and sends the data of the first terminal to the target cell;

[0308] The third receiving module is configured to receive a handover configuration event sent by the network side, and send the data of the first terminal to the target cell when it is determined that the handover configuration event is met.

[0309] The device provided in the embodiment of the present application can execute the above method embodiment, and its implementation principle and technical effects are similar, so this embodiment will not be repeated here.

[0310] The embodiment of the present application also provides a switching device, which is applied to the second terminal. Figure 6 As shown, the switching device 600 includes:

[0311] A first sending module 601 is configured to send first auxiliary information to a first terminal, where the first auxiliary information is used to enable the first terminal to switch to a target cell according to the auxiliary information;

[0312] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0313] The target cell belongs to a cell group of the first terminal; the cell group is established according to a user trajectory of the first terminal, and cells in the cell group share the context of the first terminal.

[0314] Wherein, the device further includes:

[0315] The first receiving module is configured to receive second auxiliary information sent by a third terminal, where the second auxiliary information includes an identifier of a TA corresponding to the third terminal and a cell corresponding to the third terminal.

[0316] The device provided in the embodiment of the present application can execute the above method embodiment, and its implementation principle and technical effects are similar, so this embodiment will not be repeated here.

[0317] The present application also provides a switching device, which is applied to a network device. Figure 7 As shown, the switching device 700 includes:

[0318] A first receiving module 701 is configured to receive cell information reported by a first terminal, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resides or has been connected during a target time period; a first sending module 702 is configured to send cell group information and the identifier of the first terminal to the first terminal based on the cell information, so that the first terminal performs handover to the target cell based on the auxiliary information received from the second terminal;

[0319] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal. The target cell belongs to the cell group of the first terminal; the cell group is established based on the user trajectory of the first terminal, and the cells within the cell group share the context of the first terminal. The identifier of the first terminal is used to uniquely identify the first terminal within the cell group, and the cells within the cell group share the context of the first terminal.

[0320] Wherein, the device further includes:

[0321] The second sending module is used to send first information to the first terminal, where the first information is used to instruct the first terminal to receive the time domain location information and / or frequency domain location information of the auxiliary information.

[0322] Wherein, the device further includes:

[0323] A third sending module is configured to send second information to the first terminal, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information:

[0324] Transmit power;

[0325] Sending time domain location information of the auxiliary information;

[0326] The frequency domain location information of the auxiliary information is sent.

[0327] The time domain location information includes at least one of the following: a period, a time domain duration, and an offset value;

[0328] The sending of the auxiliary information satisfies any of the following conditions:

[0329] After or before SSB is sent or within the sending window;

[0330] After or before SMTC is sent or within the sending window;

[0331] After or before the measurement reference symbol is sent or within the sending window;

[0332] During the uplink calibration gap.

[0333] The frequency domain location information satisfies any of the following conditions:

[0334] The frequency domain position completely or partially overlaps with that of SSB;

[0335] The frequency domain position of the measurement reference symbol is fully or partially overlapped.

[0336] Wherein, the device further includes:

[0337] The fourth sending module is used to send the second message to the second cell, so that the second cell can determine the first information of other cells and send the first information to the terminal in the second cell.

[0338] Wherein, the device further includes:

[0339] The second receiving module is used to send resource configuration information to the first terminal, so that the first terminal uses the TA to send uplink data and the identifier of the first terminal to the target cell according to the resource configuration information.

[0340] The device further comprises any one of the following modules:

[0341] a third receiving module, configured to receive an identifier of the target cell sent by the first terminal, activate the target cell, and send data of the first terminal to the target cell;

[0342] a fifth sending module, configured to send a handover configuration event to the first terminal, so that the first terminal sends data of the first terminal to the target cell when determining that the handover configuration event is satisfied;

[0343] The fourth receiving module is configured to receive a measurement result or event sent by the first terminal, activate the target cell according to the measurement result or event, and send data of the first terminal to the target cell.

[0344] The device provided in the embodiment of the present application can execute the above method embodiment, and its implementation principle and technical effects are similar, so this embodiment will not be repeated here.

[0345] The embodiment of the present application also provides a switching device, which is applied to the first terminal. Figure 8 As shown, the switching device 800 includes: a processor 801 and a transceiver 802;

[0346] The transceiver 802 is configured to receive auxiliary information sent by the second terminal;

[0347] The processor 801 is configured to perform handover to a target cell according to the auxiliary information;

[0348] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0349] The target cell belongs to a cell group of the first terminal; the cell group is established according to a user trajectory of the first terminal, and cells in the cell group share the context of the first terminal.

[0350] The processor 801 is configured to determine a cell group corresponding to the first terminal.

[0351] Among them, the transceiver 802 is used to report cell information to the network side, wherein the cell information includes the identifier and timestamp of the cell where the first terminal resides or has been connected during the target time period; and receive the cell group information and the identifier of the first terminal sent by the network side based on the cell information, and the identifier of the first terminal is used to uniquely identify the first terminal within the cell group.

[0352] The cell information also includes: PCI.

[0353] The transceiver 802 is configured to receive first information sent by a network side, where the first information is used to instruct the first terminal to receive time domain location information and / or frequency domain location information of the auxiliary information.

[0354] The transceiver 802 is configured to receive second information sent by the network side, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information:

[0355] Transmit power;

[0356] Sending time domain location information of the auxiliary information;

[0357] The frequency domain location information of the auxiliary information is sent.

[0358] The time domain location information includes at least one of the following: a period, a time domain duration, and an offset value;

[0359] The sending of the auxiliary information satisfies any of the following conditions:

[0360] After or before SSB is sent or within the sending window;

[0361] After or before SMTC is sent or within the sending window;

[0362] After or before the measurement reference symbol is sent or within the sending window;

[0363] During the uplink calibration gap.

[0364] The frequency domain location information satisfies any of the following conditions:

[0365] The frequency domain position completely or partially overlaps with that of SSB;

[0366] The frequency domain position of the measurement reference symbol is fully or partially overlapped.

[0367] The processor 801 is configured to send uplink data and the identifier of the first terminal to the target cell using the TA when it is determined according to the auxiliary information that the measurement result of the first cell corresponding to the identifier of the cell meets a first preset requirement.

[0368] Among them, the processor 801 is used to use the TA to send uplink data and the identifier of the first terminal to the target cell when it is determined according to the auxiliary information that the first cell corresponding to the identifier of the cell and the first terminal are located in the same cell group and the measurement result of the first cell meets the first preset requirement.

[0369] Among them, the processor 801 is used to receive resource configuration information sent by the network side, and the resource configuration information indicates the time domain resource information and / or frequency domain resource information used by the first terminal when switching to the target cell; according to the resource configuration information, the TA is used to send uplink data and the identifier of the first terminal to the target cell.

[0370] The processor 801 is configured to use the TA to send uplink data and the identifier of the first terminal to the target cell using the initial bandwidth portion or the reserved uplink resources.

[0371] The transceiver 802 is further configured to perform any one of the following steps:

[0372] sending an identifier of a source cell to the target cell, so that the target cell obtains data of the first terminal from the source cell;

[0373] Sending an identifier of the target cell to a source cell, so that the source cell activates the target cell and sends data of the first terminal to the target cell;

[0374] Receive a handover configuration event sent by the network side, and when it is determined that the handover configuration event is met, send the data of the first terminal to the target cell.

[0375] The device provided in the embodiment of the present application can execute the above method embodiment, and its implementation principle and technical effects are similar, so this embodiment will not be repeated here.

[0376] The embodiment of the present application also provides a switching device, which is applied to the second terminal. Figure 9 As shown, the switching device 900 includes: a processor 901 and a transceiver 902;

[0377] The transceiver 902 is configured to send first auxiliary information to a first terminal, where the first auxiliary information is used to enable the first terminal to switch to a target cell according to the auxiliary information;

[0378] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal. The target cell belongs to the cell group of the first terminal; the cell group is established based on the user trajectory of the first terminal, and the cells in the cell group share the context of the first terminal.

[0379] The transceiver 902 is further configured to receive second auxiliary information sent by a third terminal, where the second auxiliary information includes an identifier of a TA corresponding to the third terminal and a cell corresponding to the third terminal.

[0380] The device provided in the embodiment of the present application can execute the above method embodiment, and its implementation principle and technical effects are similar, so this embodiment will not be repeated here.

[0381] The present application also provides a switching device, which is applied to a network device. Figure 10 As shown, the switching device 1000 includes: a processor 1001 and a transceiver 1002;

[0382] The transceiver 1002 is configured to receive cell information reported by a first terminal, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resided or connected during a target time period; and send cell group information and the identifier of the first terminal to the first terminal based on the cell information, so that the first terminal performs handover to the target cell based on the auxiliary information when receiving the auxiliary information from the second terminal.

[0383] The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

[0384] The target cell belongs to a cell group of the first terminal; the cell group is established based on the user trajectory of the first terminal, and the cells in the cell group share the context of the first terminal. The identifier of the first terminal is used to uniquely identify the first terminal in the cell group, and the cells in the cell group share the context of the first terminal.

[0385] The transceiver 1002 is configured to send first information to the first terminal, where the first information is used to instruct the first terminal to receive time domain location information and / or frequency domain location information of the auxiliary information.

[0386] The transceiver 1002 is configured to send second information to the first terminal, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information:

[0387] Transmit power;

[0388] Sending time domain location information of the auxiliary information;

[0389] The frequency domain location information of the auxiliary information is sent.

[0390] The time domain location information includes at least one of the following: a period, a time domain duration, and an offset value;

[0391] The sending of the auxiliary information satisfies any of the following conditions:

[0392] After or before SSB is sent or within the sending window;

[0393] After or before SMTC is sent or within the sending window;

[0394] After or before the measurement reference symbol is sent or within the sending window;

[0395] During the uplink calibration gap.

[0396] The frequency domain location information satisfies any of the following conditions:

[0397] The frequency domain position completely or partially overlaps with that of SSB;

[0398] The frequency domain position of the measurement reference symbol is fully or partially overlapped.

[0399] The transceiver is configured to send the second message to the second cell, so that the second cell can determine the first information of other cells and send the first information to the terminal in the second cell.

[0400] The transceiver 1002 is configured to send resource configuration information to the first terminal, so that the first terminal sends uplink data and an identifier of the first terminal to a target cell using the TA according to the resource configuration information.

[0401] The transceiver 1002 is configured to perform any one of the following steps:

[0402] receiving an identifier of the target cell sent by the first terminal, activating the target cell, and sending data of the first terminal to the target cell;

[0403] sending a handover configuration event to the first terminal, so that the first terminal sends data of the first terminal to the target cell when determining that the handover configuration event is satisfied;

[0404] Receive a measurement result or event sent by the first terminal, activate the target cell according to the measurement result or event, and send data of the first terminal to the target cell.

[0405] The device provided in the embodiment of the present application can execute the above method embodiment, and its implementation principle and technical effects are similar, so this embodiment will not be repeated here.

[0406] It should be noted that the division of units in the embodiments of the present application is schematic and is merely a logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0407] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0408] An embodiment of the present application also provides a communication device, including: a transceiver, a memory, a processor, and a program stored in the memory and executable on the processor, wherein the processor implements the steps in the switching method described above when executing the program.

[0409] The embodiment of the present application also provides a readable storage medium, on which a program is stored. When the program is executed by the processor, each process of the above-mentioned switching method embodiment is implemented, and the same technical effect is achieved. To avoid repetition, it is not repeated here. The readable storage medium can be any available medium or data storage device that can be accessed by the processor, including but not limited to magnetic storage (such as floppy disk, hard disk, tape, magneto-optical disk (MO), etc.), optical storage (such as CD, DVD, BD, HVD, etc.), and semiconductor storage (such as ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state drive (SSD)), etc.

[0410] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0411] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better embodiment. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD-ROM), and includes a number of instructions for enabling a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0412] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms without departing from the purpose of this application and the scope of protection of the claims, all of which are within the protection of this application.

Claims

1. A handover method, applied to a first terminal, characterized in that: include: receiving auxiliary information sent by the second terminal; switching to a target cell according to the auxiliary information; The auxiliary information includes the timing advance TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

2. The method according to claim 1, characterized in that The target cell belongs to a cell group of the first terminal; the cell group is established according to a user trajectory of the first terminal, and cells in the cell group share a context of the first terminal.

3. The method according to claim 2, characterized in that Before switching to the target cell according to the auxiliary information, the method further includes: Determine the cell group corresponding to the first terminal.

4. The method according to claim 3, characterized in that The determining the cell group corresponding to the first terminal includes: Reporting cell information to the network side, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resides or has been connected during a target time period; Receive the cell group information and the identifier of the first terminal sent by the network side according to the cell information, where the identifier of the first terminal is used to uniquely identify the first terminal in the cell group.

5. The method according to claim 1, wherein The method further comprises: Receive first information sent by the network side, where the first information is used to instruct the first terminal to receive time domain location information and / or frequency domain location information of the auxiliary information.

6. The method according to claim 1, characterized in that The method further comprises: receiving second information sent by the network side, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information: Transmit power; Sending time domain location information of the auxiliary information; The frequency domain location information of the auxiliary information is sent.

7. The method according to claim 5 or 6, characterized in that The time domain position information includes at least one of the following: a period, a time domain duration, and an offset value.

8. The method according to claim 7, characterized in that The sending of the auxiliary information meets any of the following conditions: After or before the synchronization signal / physical broadcast channel signal block SSB is sent or within the sending window; After or before the synchronization signal / physical broadcast channel block measurement timing configuration SMTC is sent or within the sending window; After or before the measurement reference symbol is sent or within the sending window; During the uplink calibration gap.

9. The method according to claim 5 or 6, characterized in that The frequency domain location information satisfies any of the following conditions: The frequency domain position completely or partially overlaps with that of SSB; The frequency domain position of the measurement reference symbol is fully or partially overlapped.

10. The method according to claim 1, characterized in that The switching to the target cell according to the auxiliary information includes: When it is determined according to the auxiliary information that the measurement result of the first cell corresponding to the cell identifier meets the first preset requirement, uplink data and the identifier of the first terminal are sent to the target cell using the TA.

11. The method according to claim 10, characterized in that The sending uplink data and the identifier of the first terminal to the target cell by using the TA includes: When it is determined according to the auxiliary information that the first cell corresponding to the cell identifier and the first terminal are located in the same cell group and the measurement result of the first cell meets the first preset requirement, uplink data and the identifier of the first terminal are sent to the target cell using the TA.

12. The method according to claim 10 or 11, characterized in that The sending uplink data and the identifier of the first terminal to the target cell by using the TA includes: receiving resource configuration information sent by the network side, where the resource configuration information indicates time domain resource information and / or frequency domain resource information used by the first terminal when switching to the target cell; According to the resource configuration information, uplink data and the identifier of the first terminal are sent to the target cell using the TA.

13. The method according to claim 10 or 11, characterized in that The sending uplink data and the identifier of the first terminal to the target cell by using the TA includes: The uplink data and the identifier of the first terminal are sent to the target cell using the TA by utilizing the initial bandwidth portion or the reserved uplink resources.

14. The method according to claim 10 or 11, characterized in that The method further comprises any one of the following steps: sending an identifier of a source cell to the target cell, so that the target cell obtains data of the first terminal from the source cell; Sending an identifier of the target cell to a source cell, so that the source cell activates the target cell and sends data of the first terminal to the target cell; Receive a handover configuration event sent by the network side, and when it is determined that the handover configuration event is met, send the data of the first terminal to the target cell.

15. A handover method, applied to a second terminal, characterized in that: include: Sending first auxiliary information to a first terminal, where the first auxiliary information is used to enable the first terminal to switch to a target cell according to the auxiliary information; The first auxiliary information includes an identifier of a TA corresponding to the second terminal and a cell corresponding to the second terminal.

16. The method according to claim 15, characterized in that The method further comprises: Second auxiliary information sent by a third terminal is received, where the second auxiliary information includes an identifier of a TA corresponding to the third terminal and a cell corresponding to the third terminal.

17. A switching method, applied to a network device, characterized in that: include: Receiving cell information reported by the first terminal, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resides or has been connected within a target time period; sending, according to the cell information, cell group information and an identifier of the first terminal to the first terminal, so that when the first terminal receives the auxiliary information of the second terminal, it switches to a target cell according to the auxiliary information; The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

18. The method according to claim 17, characterized in that The method further comprises: First information is sent to the first terminal, where the first information is used to instruct the first terminal to receive time domain location information and / or frequency domain location information of the auxiliary information.

19. The method according to claim 17, wherein The method further comprises: Sending second information to the first terminal, where the second information is used to instruct the first terminal to send at least one of the following information of the auxiliary information: Transmit power; Sending time domain location information of the auxiliary information; The frequency domain location information of the auxiliary information is sent.

20. The method according to claim 18 or 19, characterized in that The time domain position information includes at least one of the following: a period, a time domain duration, and an offset value.

21. The method according to claim 20, characterized in that The sending of the auxiliary information meets any of the following conditions: After or before SSB is sent or within the sending window; After or before SMTC is sent or within the sending window; After or before the measurement reference symbol is sent or within the sending window; During the uplink calibration gap.

22. The method according to claim 18 or 19, characterized in that The frequency domain location information satisfies any of the following conditions: The frequency domain position completely or partially overlaps with that of SSB; The frequency domain position of the measurement reference symbol is fully or partially overlapped.

23. The method according to claim 17, wherein The method further comprises: A second message is sent to the second cell, so that the second cell determines the first information of other cells and sends the first information to terminals in the second cell.

24. The method according to claim 17, wherein The method further comprises: Resource configuration information is sent to the first terminal, so that the first terminal sends uplink data and an identifier of the first terminal to the target cell using the TA according to the resource configuration information.

25. The method according to claim 17, wherein The method further comprises any one of the following steps: receiving an identifier of the target cell sent by the first terminal, activating the target cell, and sending data of the first terminal to the target cell; sending a handover configuration event to the first terminal, so that the first terminal sends data of the first terminal to the target cell when determining that the handover configuration event is satisfied; Receive a measurement result or event sent by the first terminal, activate the target cell according to the measurement result or event, and send data of the first terminal to the target cell.

26. A switching device, applied to a first terminal, characterized in that: include: A first receiving module, configured to receive auxiliary information sent by a second terminal; A handover module, configured to perform handover to a target cell according to the auxiliary information; The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

27. A switching device, applied to a second terminal, characterized in that: include: A first sending module, configured to send first auxiliary information to a first terminal, where the first auxiliary information is used to enable the first terminal to switch to a target cell according to the auxiliary information; The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

28. A switching device, applied to a network device, characterized in that: include: A first receiving module is configured to receive cell information reported by a first terminal, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resides or has been connected within a target time period; a first sending module, configured to send cell group information and an identifier of the first terminal to the first terminal according to the cell information, so that the first terminal performs handover to a target cell according to the auxiliary information when receiving the auxiliary information from the second terminal; The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

29. A switching device, applied to a first terminal, characterized in that: include: processors and transceivers; The transceiver is configured to receive auxiliary information sent by the second terminal; The processor is configured to perform handover to a target cell according to the auxiliary information; The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

30. A switching device, applied to a second terminal, characterized in that: include: processors and transceivers; The transceiver is configured to send first auxiliary information to the first terminal, where the first auxiliary information is used to enable the first terminal to switch to a target cell according to the auxiliary information; The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

31. A switching device, applied to a network device, characterized in that: include: processors and transceivers; The transceiver is configured to receive cell information reported by a first terminal, wherein the cell information includes an identifier and a timestamp of a cell in which the first terminal resides or has been connected during a target time period; and send cell group information and the identifier of the first terminal to the first terminal based on the cell information, so that the first terminal performs handover to the target cell based on the auxiliary information when receiving the auxiliary information from the second terminal; The auxiliary information includes the TA corresponding to the second terminal and the identifier of the cell corresponding to the second terminal.

32. A communication device comprising: A transceiver, a memory, a processor, and a program stored in the memory and executable on the processor; wherein the processor is configured to read the program in the memory to implement the steps of the switching method according to any one of claims 1 to 14; or to implement the steps of the switching method according to claim 15 or 16; or to implement the steps of the switching method according to any one of claims 17 to 25.

33. A readable storage medium for storing a program, characterized in that: When the program is executed by a processor, the program implements the steps of the switching method according to any one of claims 1 to 14; or implements the steps of the switching method according to claim 15 or 16; or implements the steps of the switching method according to any one of claims 17 to 25.

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