Cell handover method, base station, and control node
The present invention discloses a cell handover method. The method includes: a first base station receives a handover request sent by the UE, where the handover request is used to indicate that the UE requests to be handed over to a target second cell of the at least two second cells, and the handover request carries a physical cell identifier PCI of the target second cell. The first base station determines the PCI is corresponding to a plurality of second cells and receives location information of the UE sent by a target second base station of the at least two second base stations that is corresponding to the target second cell, where the location information is obtained by the target second base station based on configuration information; and then determines the target second cell from the plurality of second cells based on the location information.
1. A cell handover method, applied to a communications system comprising a first base station, at least two second base stations, and user equipment (UE), wherein the first base station is corresponding to a first cell, the first cell is a serving cell of the UE, the at least two second base stations are corresponding to at least two second cells, the at least two second cells are neighboring cells of the first cell, the at least two second cells are in one-to-one correspondence with at least two cell global identities (CGIs), each CGI is used to uniquely identify a corresponding second cell in the communications system, each second base station stores configuration information, the configuration information is used to indicate a time-frequency resource used when the UE sends a sounding reference signal (SRS) to the first base station, and the method comprises:
receiving, by the first base station, a handover request sent by the UE, wherein the handover request is used to indicate that the UE requests to be handed over to a target second cell of the at least two second cells, and the handover request carries a physical cell identifier (PCI) of the target second cell;
determining, by the first base station, that the PCI is corresponding to a plurality of second cells;
receiving, by the first base station, location information of the UE sent by a target second base station of the at least two second base stations that is corresponding to the target second cell, wherein the location information is obtained by the target second base station based on the configuration information; and
determining, by the first base station, the target second cell from the plurality of second cells based on the location information.
2. The method according to claim 1 , wherein the location information carries a CGI of the target second cell, and
the determining, by the first base station, the target second cell from the plurality of second cells based on the location information comprises:
determining, by the first base station, the target second cell from the plurality of second cells based on the CGI.
3. The method according to claim 1 , wherein before the receiving, by the first base station, location information of the UE sent by a target second base station of the at least two second base stations that is corresponding to the target second cell, the method further comprises:
sending, by the first base station, configuration information to the target second base station, so that the target second base station obtains the location information of the UE based on the configuration information, and sends the location information to the first base station.
4. A cell handover method, applied to a communications system comprising a control node, a first base station, at least two second base stations, and user equipment (UE), wherein the first base station is corresponding to a first cell, the first cell is a serving cell of the UE, the at least two second base stations are corresponding to at least two second cells, the at least two second cells are neighboring cells of the first cell, the at least two second cells are in one-to-one correspondence with at least two cell global identities (CGIs), each CGI is used to uniquely identify a corresponding second cell in the communications system, each second base station stores configuration information, the configuration information is used to indicate a time-frequency resource used when the UE sends a sounding reference signal (SRS) to the first base station, and the method comprises:
obtaining, by the control node, a handover request, wherein the handover request is used to indicate that the UE requests to be handed over to a target second cell of the at least two second cells, and the handover request carries a physical cell identifier (PCI) of the target second cell;
determining, by the control node, that the PCI is corresponding to a plurality of second cells;
obtaining, by the control node, location information of the UE; and
determining, by the control node, the target second cell from the plurality of second cells based on the location information.
5. The method according to claim 4 , wherein the location information carries a CGI of the target second cell, and
the determining, by the control node, the target second cell from the plurality of second cells based on the location information comprises:
determining, by the control node, the target second cell from the plurality of second cells based on the CGI.
6. A base station, configured in a communications system comprising at least two second base stations and user equipment (UE), wherein the base station is corresponding to a first cell, the first cell is a serving cell of the UE, the at least two second base stations are corresponding to at least two second cells, the at least two second cells are neighboring cells of the first cell, the at least two second cells are in one-to-one correspondence with at least two cell global identities (CGIs), each CGI is used to uniquely identify a corresponding second cell in the communications system, each second base station stores configuration information, the configuration information is used to indicate a time-frequency resource used when the UE sends a sounding reference signal (SRS) to the base station, and the base station comprises:
a transceiver, configured to receive a handover request sent by the UE, wherein the handover request is used to indicate that the UE requests to be handed over to a target second cell of the at least two second cells, and the handover request carries a physical cell identifier (PCI) of the target second cell; and
a processor and a non-transitory computer-readable storage medium storing a program to be executed by the processor,
the processor configured to determine that the PCI is corresponding to a plurality of second cells; wherein
the transceiver, configured to receive location information of the UE sent by a target second base station of the at least two second base stations that is corresponding to the target second cell, wherein the location information is obtained by the target second base station based on the configuration information; and
the processor, configured to determine the target second cell from the plurality of second cells based on the location information.
7. The base station according to claim 6 , wherein the location information carries a CGI of the target second cell, and
the processor, configured to determine the target second cell from the plurality of second cells based on the CGI of the target second cell.
8. The base station according to claim 6 , wherein the base station further comprises:
a transceiver, configured to: before the receiving unit receives the location information of the UE sent by the target second base station of the at least two second base stations that is corresponding to the target second cell, send configuration information to the target second base station, so that the target second base station obtains the location information of the UE based on the configuration information, and sends the location information to the base station.