CN-122002424-A - Method, device and storage medium for determining target cell

Abstract

The application relates to a method, a device and a storage medium for determining a target cell, which are applied to terminal equipment, wherein the method comprises the steps of measuring the beam quality of a plurality of candidate cells to obtain a plurality of first measurement results, wherein the plurality of candidate cells are in one-to-one correspondence with the plurality of first measurement results; and determining the candidate cells which correspond to the first measurement result and are greater than or equal to the second threshold value in the first candidate cell set as target cells under the condition that the candidate cells which correspond to the first measurement result and are greater than or equal to the second threshold value exist in the first candidate cell set. In the application, in the conditional LTM cell switching, the terminal equipment determines the target cell according to a plurality of thresholds and the measurement result of the beam quality of the candidate cell.

Inventors

• LUO YAJUAN
• LI HUI
• DA REN
• GAO QIUBIN

Assignees

• 大唐移动通信设备有限公司

Dates

Publication Date

20260508

Application Date

20241108

Claims (20)

1. 1. A method for determining a target cell, applied to a terminal device, the method comprising: Measuring beam quality of a plurality of candidate cells to obtain a plurality of first measurement results, wherein the plurality of candidate cells are in one-to-one correspondence with the plurality of first measurement results, the plurality of candidate cells are cells of first access network equipment, the first access network equipment is adjacent access network equipment of second access network equipment, and the second access network equipment is service access network equipment of the terminal equipment; Selecting a candidate cell of which the corresponding first measurement result is greater than or equal to a first threshold value from the plurality of candidate cells to obtain a first candidate cell set; And under the condition that the candidate cells with the first measurement result being greater than or equal to a second threshold value exist in the first candidate cell set, determining the candidate cells with the first measurement result being greater than or equal to the second threshold value in the first candidate cell set as target cells.
2. 2. The method of claim 1, wherein the measuring beam quality of the plurality of candidate cells, prior to obtaining the plurality of first measurements, further comprises: Receiving configuration information from the second access network device; And determining the candidate cells, the first threshold value and the second threshold value according to the configuration information.
3. 3. The method according to claim 1 or 2, characterized in that the method further comprises: The method comprises the steps that cell identification, beam identification and first measurement results of candidate cells in a first candidate cell set are sent to second access network equipment, the cell identification, the beam identification and the first measurement results of the candidate cells in the first candidate cell set are used for sending first indication information to the first access network equipment by the second access network equipment, the first indication information comprises the cell identification, the beam identification and the first measurement results of the candidate cells in the first candidate cell set, and the first indication information is used for indicating the first access network equipment to determine beams of communication between the candidate cells in the first candidate cell set and the terminal equipment according to the first measurement results.
4. 4. A method according to claim 3, wherein after said transmitting the cell identity, beam identity and first measurement result of the candidate cells in the first set of candidate cells to the second access network device, the method further comprises: Performing downlink synchronization on the candidate cells in the first candidate cell set, and/or And carrying out uplink synchronization on the candidate cells in the first candidate cell set.
5. 5. The method of claim 4, wherein the downlink synchronization of the candidate cells in the first set of candidate cells comprises: Receiving a synchronization signal block SSB from the second access network device, the SSB comprising information of candidate cells in the first set of candidate cells; And carrying out downlink time synchronization on the candidate cells in the first candidate cell set according to the information of the candidate cells in the first candidate cell set.
6. 6. The method according to claim 4 or 5, wherein said uplink synchronization of candidate cells in said first set of candidate cells comprises: Transmitting corresponding lead code sequences to the candidate cells in the first candidate cell set through physical random access channel PRACH resources of the candidate cells in the first candidate cell set, wherein the lead code sequences are used for determining time advance TA of the candidate cells in the first candidate cell set; receiving a TA of a candidate cell in the first candidate cell set from the first access network device; And carrying out uplink time synchronization on the candidate cells in the first candidate cell set according to the TA of the candidate cells in the first candidate cell set.
7. 7. The method according to any one of claims 4-6, wherein, in the case that the candidate cells in the first candidate cell set exist that have the corresponding first measurement result greater than or equal to the second threshold value, determining that the candidate cells in the first candidate cell set that have the corresponding first measurement result greater than or equal to the second threshold value are target cells includes: When the time interval between the measurement time of the first measurement result and the completion time of uplink synchronization is smaller than a preset duration and candidate cells with the first measurement result being greater than or equal to a second threshold value exist in the first candidate cell set, determining the candidate cells with the first measurement result being greater than or equal to the second threshold value in the first candidate cell set as target cells; Under the condition that the time interval between the measurement time of the first measurement result and the completion time of uplink synchronization is greater than or equal to a preset duration, measuring the beam quality of the candidate cells in the first candidate cell set to obtain M second measurement results, wherein M is the number of the candidate cells included in the first candidate cell set, and M is an integer greater than 0; and under the condition that the candidate cells with the second measurement result being greater than or equal to a second threshold value exist in the first candidate cell set, determining the candidate cells with the second measurement result being greater than or equal to the second threshold value in the first candidate cell set as target cells.
8. 8. The method of claim 1, wherein after measuring beam quality of the plurality of candidate cells to obtain a plurality of first measurement results, the method further comprises: selecting a candidate cell of which the corresponding first measurement result is greater than or equal to a third threshold value from the plurality of candidate cells to obtain a second candidate cell set; selecting a candidate cell of the plurality of candidate cells, where the corresponding first measurement result is greater than or equal to a first threshold, and obtaining a first candidate cell set includes: and selecting the candidate cells in the second candidate cell set, wherein the corresponding first measurement result of the candidate cells is larger than or equal to a first threshold value, so as to obtain a first candidate cell set.
9. 9. A method for determining a target cell, the method being applied to a second access network device, the method comprising: And sending configuration information to terminal equipment, wherein the configuration information is used for configuring a plurality of candidate cells, a first threshold value and a second threshold value, the first threshold value is used for the terminal equipment to select candidate cells with a first measurement result larger than or equal to the first threshold value from the plurality of candidate cells to obtain a first candidate cell set, and the second threshold value is used for the terminal equipment to determine that the candidate cells with the first measurement result larger than or equal to the second threshold value in the first candidate cell set are target cells when the candidate cells with the first measurement result larger than or equal to the second threshold value exist in the first candidate cell set.
10. 10. The method of claim 9, wherein a plurality of first measurement results are obtained by the terminal device measuring beam quality of the plurality of candidate cells, the plurality of candidate cells being in one-to-one correspondence with the plurality of first measurement results, the second access network device being a serving access network device of the terminal device, the plurality of candidate cells being cells of a first access network device, the first access network device being an adjacent access network device of the second access network device.
11. 11. The method according to claim 9 or 10, wherein after the sending of the configuration information to the terminal device, the method further comprises: Receiving a cell identification, a beam identification and a first measurement result of a candidate cell in the first candidate cell set from the terminal equipment; And sending first indication information to first access network equipment, wherein the first indication information comprises cell identifications, beam identifications and first measurement results of candidate cells in the first candidate cell set, and the first indication information is used for indicating the first access network equipment to determine beams for communicating between the candidate cells in the first candidate cell set and the terminal equipment according to the first measurement results.
12. 12. The method of claim 11, wherein after the sending the first indication information to the first access network device, the method further comprises: Receiving information of candidate cells in the first candidate cell set from the first access network device; And sending a synchronous signal block SSB to the terminal equipment, wherein the SSB comprises information of candidate cells in the first candidate cell set, and the information of the candidate cells in the first candidate cell set is used for carrying out downlink time synchronization on the candidate cells in the first candidate cell set.
13. 13. The method of claim 12, wherein the configuration information is further used to configure physical random access channel, PRACH, resources of the plurality of candidate cells, wherein the PRACH resources of the first candidate cell set are used for the terminal device to send corresponding preamble sequences to the first candidate cell set, respectively, wherein the preamble sequences are used for the first access network device to determine a time advance, TA, of the first candidate cell set, and wherein the TA of the first candidate cell set is used for the terminal device to perform uplink time synchronization on the first candidate cell set.
14. 14. The method according to claim 13, characterized in that the second threshold is used for the terminal device: When the time interval between the measurement time of the first measurement result and the completion time of uplink synchronization is smaller than a preset duration and candidate cells with the first measurement result being greater than or equal to a second threshold value exist in the first candidate cell set, determining the candidate cells with the first measurement result being greater than or equal to the second threshold value in the first candidate cell set as target cells; And under the condition that the time interval between the measurement time of the first measurement result and the completion time of uplink synchronization is greater than or equal to a preset duration, measuring the beam quality of the candidate cells in the first candidate cell set to obtain M second measurement results, and under the condition that the candidate cells with the second measurement result greater than or equal to a second threshold value exist in the first candidate cell set, determining the candidate cells with the second measurement result greater than or equal to the second threshold value in the first candidate cell set as target cells, wherein M is the number of the candidate cells included in the first candidate cell set, and M is an integer greater than 0.
15. 15. The method according to claim 9, wherein the configuration information is further used for configuring a third threshold, the third threshold is used for the terminal device to select candidate cells, among the plurality of candidate cells, for which the first measurement result is greater than or equal to the third threshold, to obtain a second candidate cell set, and the first threshold is used for the terminal device to select candidate cells, among the second candidate cells, for which the first measurement result is greater than or equal to the first threshold, to obtain a first candidate cell set.
16. 16. A method for determining a target cell, the method being applied to a first access network device, the method comprising: Receiving first indication information from second access network equipment, wherein the first indication information comprises cell identifications, beam identifications and first measurement results of candidate cells in a first candidate cell set, the first candidate cell set is obtained by selecting candidate cells with corresponding first measurement results larger than or equal to a first threshold value from a plurality of candidate cells by terminal equipment, the plurality of first measurement results are obtained by measuring beam quality of the plurality of candidate cells by the terminal equipment, the plurality of candidate cells are in one-to-one correspondence with the plurality of first measurement results, the plurality of candidate cells are cells of the first access network equipment, the second access network equipment is service access network equipment of the terminal equipment, and the first access network equipment is adjacent access network equipment of the second access network equipment; And determining the wave beam of the communication between the candidate cell in the first candidate cell set and the terminal equipment according to the cell identification, the wave beam identification and the first measurement result of the candidate cell in the first candidate cell set.
17. 17. The method of claim 16, wherein the method further comprises: Receiving a preamble sequence of the candidate cell in the first candidate cell set from the terminal device through physical random access channel PRACH resources of the candidate cell in the first candidate cell set by using the determined wave beams of the candidate cell in the first candidate cell set; Determining a time advance TA of the candidate cells in the first candidate cell set according to the preamble sequences of the candidate cells in the first candidate cell set; And sending the TA of the candidate cell in the first candidate cell set to the terminal equipment, wherein the TA of the candidate cell in the first candidate cell set is used for uplink time synchronization of the candidate cell in the first candidate cell set by the terminal equipment.
18. 18. A device for determining a target cell, which is applied to a terminal device and comprises a memory, a transceiver and a processor: the memory is used for storing a computer program, the transceiver is used for receiving and transmitting data under the control of the processor, and the processor is used for reading the computer program in the memory and executing the following operations: Measuring beam quality of a plurality of candidate cells to obtain a plurality of first measurement results, wherein the plurality of candidate cells are in one-to-one correspondence with the plurality of first measurement results, the plurality of candidate cells are cells of first access network equipment, the first access network equipment is adjacent access network equipment of second access network equipment, and the second access network equipment is service access network equipment of the terminal equipment; Selecting a candidate cell of which the corresponding first measurement result is greater than or equal to a first threshold value from the plurality of candidate cells to obtain a first candidate cell set; And under the condition that the candidate cells with the first measurement result being greater than or equal to a second threshold value exist in the first candidate cell set, determining the candidate cells with the first measurement result being greater than or equal to the second threshold value in the first candidate cell set as target cells.
19. 19. The apparatus of claim 18, wherein the processor is further configured to read a computer program in the memory and perform the following: The method comprises the steps that cell identification, beam identification and first measurement results of candidate cells in a first candidate cell set are sent to second access network equipment, the cell identification, the beam identification and the first measurement results of the candidate cells in the first candidate cell set are used for sending first indication information to the first access network equipment by the second access network equipment, the first indication information comprises the cell identification, the beam identification and the first measurement results of the candidate cells in the first candidate cell set, and the first indication information is used for indicating the first access network equipment to determine beams of communication between the candidate cells in the first candidate cell set and the terminal equipment according to the first measurement results.
20. 20. The apparatus of claim 19, wherein after the transmitting the cell identification, beam identification, and first measurement result of the candidate cells in the first set of candidate cells to the second access network device, the processor is further configured to read the computer program in the memory and perform operations of: Performing downlink synchronization on the candidate cells in the first candidate cell set, and/or And carrying out uplink synchronization on the candidate cells in the first candidate cell set.

Description

Method, device and storage medium for determining target cell Technical Field The present application relates to the field of communications technologies, and in particular, to a method and apparatus for determining a target cell, and a storage medium. Background Lower-Layer Trigger Mobility (LTM) is to implement handover of a serving cell of a terminal device through Layer (L) 1/L2 signaling. LTM cell handoffs and conditional (LTM cell handoffs are defined in the third generation partnership project (3rd Generation Partnership Project,3GPP) standard. In the LTM cell handover, the terminal device may report the measurement result of the beam quality of the candidate cell to the access network device. The access network device may determine an appropriate target cell according to the measurement result of the beam quality of the candidate cell, and may then instruct the terminal device to perform cell handover. In the conditional LTM cell handover, the terminal device may directly perform cell handover in case the terminal device determines that the measurement result of the beam quality of the candidate cell satisfies the cell handover condition. However, in the conditional LTM cell handover, the 3GPP standard does not specify how the terminal device determines the target cell. Disclosure of Invention The embodiment of the application provides a method, a device and a storage medium for determining a target cell, which are used for determining the target cell by terminal equipment according to a plurality of thresholds and measurement results of beam quality of candidate cells in conditional LTM cell switching. In a first aspect, the present application provides a method for determining a target cell, applied to a terminal device, where the method includes: Measuring beam quality of a plurality of candidate cells to obtain a plurality of first measurement results, wherein the plurality of candidate cells are in one-to-one correspondence with the plurality of first measurement results, the plurality of candidate cells are cells of first access network equipment, the first access network equipment is adjacent access network equipment of second access network equipment, and the second access network equipment is service access network equipment of the terminal equipment; Selecting a candidate cell of which the corresponding first measurement result is greater than or equal to a first threshold value from the plurality of candidate cells to obtain a first candidate cell set; And under the condition that the candidate cells with the first measurement result being greater than or equal to a second threshold value exist in the first candidate cell set, determining the candidate cells with the first measurement result being greater than or equal to the second threshold value in the first candidate cell set as target cells. As a possible implementation manner, before the measuring beam quality of the plurality of candidate cells and obtaining the plurality of first measurement results, the method further includes: Receiving configuration information from the second access network device; And determining the candidate cells, the first threshold value and the second threshold value according to the configuration information. As a possible implementation manner, the receiving configuration information from the second access network device includes: And receiving Radio Resource Control (RRC) signaling from the second access network equipment, wherein the RRC signaling comprises configuration information. As a possible implementation manner, the method further comprises: The method comprises the steps that cell identification, beam identification and first measurement results of candidate cells in a first candidate cell set are sent to second access network equipment, the cell identification, the beam identification and the first measurement results of the candidate cells in the first candidate cell set are used for sending first indication information to the first access network equipment by the second access network equipment, the first indication information comprises the cell identification, the beam identification and the first measurement results of the candidate cells in the first candidate cell set, and the first indication information is used for indicating the first access network equipment to determine beams of communication between the candidate cells in the first candidate cell set and the terminal equipment according to the first measurement results. As a possible implementation manner, the sending, to the second access network device, the cell identifier, the beam identifier, and the first measurement result of the candidate cell in the first candidate cell set includes: And transmitting the cell identification, the beam identification and the first measurement result of the candidate cells in the first candidate cell set to the second access network equipment through a Media Access Control (MAC) resource