Clock synchronization method and device, and storage medium
Provided are a clock synchronization method and apparatus, and a storage medium. The clock synchronization method includes that: when a source base station determines that a user equipment (UE) satisfies a handover condition, the source base station sends a handover request to a target base station, where the handover request includes a request for precision clock information; and the source base station receives the precision clock information of the target base station.
1. A clock synchronization method, comprising:
when a source base station determines that a user equipment (UE) satisfies a handover condition, sending, by the source base station, a handover request to a target base station, wherein the handover request comprises a request for precision clock information; and
receiving, by the source base station, the precision clock information of the target base station.
2. The method of claim 1 , wherein receiving, by the source base station, the precision clock information of the target base station comprises:
receiving, by the source base station from the target base station, first signaling that carries the precision clock information of the target base station.
3. The method of claim 2 , wherein the first signaling comprises one of the following: handover request acknowledge, a retrieve UE context request, Xn-User plane (Xn-U) address indication, or UE context release.
4. The method of claim 1 , wherein sending, by the source base station, the handover request to the target base station comprises:
sending, by the source base station, a handover required message to a core access and mobility management function (AMF), wherein the handover required message comprises the request for the precision clock information; and
wherein receiving, by the source base station, the precision clock information of the target base station comprises:
receiving, by the source base station from the AME, second signaling that carries the precision clock information of the target base station.
5. The method of claim 4 , wherein the second signaling comprises one of the following: a handover command, path switch request acknowledge, a UE context release command, downlink radio access network (RAN) status transfer, paging, or location reporting control.
6. The method of claim 1 , wherein after the source base station receives the precision clock information of the target base station, the method further comprises:
sending, by the source base station, first radio resource control (RRC) reconfiguration information to the UE, wherein the first RRC reconfiguration information comprises a clock difference, wherein the clock difference is a difference between a clock of the target base station and a clock of the source base station.
7. The method of claim 1 , wherein before the source base station determines that the UE satisfies the handover condition, the method further comprises:
receiving, by the source base station from the UE, a neighbor cell measurement report, wherein the neighbor cell measurement report comprises an indication that the precision clock information is required.
8. The method of claim 1 , wherein before the source base station determines that the UE satisfies the handover condition, the method further comprises:
receiving, by the source base station from the UE, an indication that the precision clock information is required.
9. The method of claim 1 , wherein before the source base station determines that the UE satisfies the handover condition, the method further comprises:
sending, by the source base station, a second RRC reconfiguration message to the UE, wherein the second RRC reconfiguration message comprises a list of neighbor cells that support a precision clock information indication.
10. The method of claim 1 , further comprising:
broadcasting, by the source base station, system information block (SIB) information, wherein the SIB information comprises a list of neighbor cells that support a precision clock information indication.
11. The method of claim 1 , further comprising:
broadcasting, by the source base station, SIB information, wherein the SIB information comprises a list of neighbor cells comprising precision clock information of the neighbor cells.
12. A base station, comprising a processor and a memory, wherein the processor is configured to execute program instructions stored in the memory to perform the clock synchronization method of claim 1 .
13. A non-transitory storage medium storing computer programs which, when executed by a processor, perform the clock synchronization method of claim 1 .
14. A clock synchronization method, comprising:
sending, by a user equipment (UE) to a source base station, an indication that precision clock information is required;
sending, by the UE, a neighbor cell measurement report to the source base station or the neighbor cell measurement report comprises an indication that precision clock information is required;
receiving, by the UE from the source base station, first radio resource control (RRC) reconfiguration information, wherein the first RRC reconfiguration information comprises a clock difference, wherein the clock difference is a difference between a clock of a target base station and a clock of the source base station.
15. A user equipment (UE), comprising a processor and a memory, wherein the processor is configured to execute program instructions stored in the memory to perform the clock synchronization method of claim 14 .
16. A clock synchronization method, comprising:
receiving, by a target base station, one of the following: a handover request message that is sent by a source base station and comprises a request for precision clock information, a handover request message that is sent by a core access and mobility management function (AMF) and comprises a request for precision clock information, or a radio resource control (RRC) reestablishment request message that is sent by a user equipment (UE) and comprises a request for precision clock information; and
sending, by the target base station, the precision clock information to the source base station through first signaling, or sending the precision clock information to the AMF through third signaling, or sending the precision clock information to the UE through an RRC response message.
17. A base station, comprising a processor and a memory, wherein the processor is configured to execute program instructions stored in the memory to perform the clock synchronization method of claim 16 .