Time domain resource configuration method and access network device
The present disclosure relates to time domain resource configuration methods and access network devices One example method includes determining a guard period (GP) resource required by a terminal device, where the GP resource required by the terminal device is a GP resource required by the terminal device for uplink synchronization with an access network device, and sending first time domain resource configuration information to the terminal device, where the first time domain resource configuration information indicates the GP resource required by the terminal device.
1. A time domain resource configuration method for an access network device, wherein the method comprises:
determining a channel measurement result of a terminal device;
determining, based on the channel measurement result, a guard period (GP) resource required by the terminal device during uplink-downlink handover, wherein the GP resource required by the terminal device comprises a first GP resource;
sending time domain resource configuration information to the terminal device, wherein the time domain resource configuration information indicates the GP resource; and
sending indication information to the terminal device, wherein the indication information is used to indicate the terminal device to send an uplink signal based on a second GP resource, and wherein the second GP resource is some or all time domain resources other than the first GP resource in a GP resource required by a cell.
2. The method according to claim 1 , wherein the GP resource required by the terminal device is used to ensure uplink synchronization between the terminal device and the access network device.
3. The method according to claim 1 , wherein the channel measurement result comprises a delay measurement result.
4. The method according to claim 3 , wherein determining, based on the channel measurement result, the GP resource required by the terminal device during the uplink-downlink handover comprises:
determining an uplink timing advance (TA) measurement value of the terminal device; and
determining the GP resource required by the terminal device based on the uplink TA measurement value of the terminal device.
5. The method according to claim 1 , wherein the GP resource required by the terminal device is a subset of the GP resource required by the cell, and wherein the method further comprises:
determining, based on one or more of a maximum coverage requirement of the cell in which the terminal device is located and uplink-downlink subframe configuration of the cell, the GP resource required by the cell.
6. The method according to claim 5 , wherein the time domain resource configuration information further indicates that some or all resources other than the GP resource required by the terminal device in the GP resource required by the cell are downlink time domain resources or uplink time domain resources.
7. The method according to claim 6 , wherein the method further comprises:
determining an interference measurement result by measuring the uplink signal, wherein:
when the interference measurement result indicates that the second GP resource is interfered with or an interference value is greater than a threshold, the GP resource required by the terminal device further comprises the second GP resource; or
when the interference measurement result indicates that the second GP resource is not interfered with or an interference value is less than a threshold, the time domain resource configuration information indicates that the second GP resource is an uplink time domain resource.
8. The method according to claim 7 , wherein the uplink time domain resource is used to receive a sounding reference signal (SRS).
9. The method according to claim 6 , wherein the method further comprises:
sending a downlink signal based on the second GP resource; and
receiving a channel quality measurement result from the terminal device, wherein the channel quality measurement result is obtained by measuring the downlink signal, wherein:
when the channel quality measurement result indicates that a channel quality value on the second GP resource is less than a threshold, the GP resource required by the terminal device further comprises the second GP resource; or
when the channel quality measurement result indicates that a channel quality value on the second GP resource is greater than a threshold, the time domain resource configuration information indicates that the second GP resource is a downlink time domain resource.
10. The method according to claim 9 , wherein the downlink time domain resource is a resource for a physical downlink shared channel (PDSCH).
11. An apparatus for an access network device, comprising at least one processor and a memory coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein the programming instructions instruct the access network device to perform operations comprising:
determining a channel measurement result of a terminal device;
determining, based on the channel measurement result, a guard period (GP) resource required by the terminal device during uplink-downlink handover, wherein the GP resource required by the terminal device comprises a first GP resource;
sending time domain resource configuration information to the terminal device, wherein the time domain resource configuration information indicates the GP resource; and
sending indication information to the terminal device, wherein the indication information is used to indicate the terminal device to send an uplink signal based on a second GP resource, and wherein the second GP resource is some or all time domain resources other than the first GP resource in a GP resource required by a cell.
12. The apparatus according to claim 11 , wherein the GP resource required by the terminal device is used to ensure uplink synchronization between the terminal device and the access network device.
13. The apparatus according to claim 11 , wherein the channel measurement result comprises a delay measurement result.
14. The apparatus according to claim 13 , wherein determining, based on the channel measurement result, the GP resource required by the terminal device during the uplink-downlink handover comprises:
determining an uplink timing advance (TA) measurement value of the terminal device; and
determining the GP resource required by the terminal device based on the uplink TA measurement value of the terminal device.
15. The apparatus according to claim 11 , wherein the GP resource required by the terminal device is a subset of the GP resource required by the cell, and wherein the operations further comprise:
determining, based on one or more of a maximum coverage requirement of the cell in which the terminal device is located and uplink-downlink subframe configuration of the cell, the GP resource required by the cell.
16. The apparatus according to claim 15 , wherein the time domain resource configuration information further indicates that some or all resources other than the GP resource required by the terminal device in the GP resource required by the cell are downlink time domain resources or uplink time domain resources.
17. The apparatus according to claim 16 , wherein the operations further comprise:
determining an an interference measurement result by measuring the uplink signal, wherein:
when the interference measurement result indicates that the second GP resource is interfered with or an interference value is greater than a threshold, the GP resource required by the terminal device further comprises the second GP resource; or
when the interference measurement result indicates that the second GP resource is not interfered with or an interference value is less than a threshold, the time domain resource configuration information indicates that the second GP resource is an uplink time domain resource.
18. The apparatus according to claim 17 , wherein the uplink time domain resource is used to receive a sounding reference signal (SRS).
19. The apparatus according to claim 16 , wherein the operations further comprise:
sending a downlink signal based on the second GP resource; and
receiving a channel quality measurement result from the terminal device, wherein the channel quality measurement result is obtained by measuring the downlink signal, wherein:
when the channel quality measurement result indicates that a channel quality value on the second GP resource is less than a threshold, the GP resource required by the terminal device further comprises the second GP resource; or
when the channel quality measurement result indicates that a channel quality value on the second GP resource is greater than a threshold, the time domain resource configuration information indicates that the second GP resource is a downlink time domain resource.
20. The apparatus according to claim 19 , wherein the downlink time domain resource is a resource for a physical downlink shared channel (PDSCH).