Secondary cell activation method and communication apparatus
In a second cell activation method, a terminal device receives activation signaling of a secondary cell sent by a network device, where the activation signaling includes at least one piece of first quasi co-location indication information; the terminal device activates the secondary cell based on the activation signaling. The technical solution provided in this application can reduce an activation delay of a secondary cell.
1. A secondary cell activation method, comprising:
receiving, by a terminal device, activation signaling of a secondary cell sent by a network device, wherein the activation signaling comprises at least one piece of first quasi co-location indication information; and activating, by the terminal device, the secondary cell based on the activation signaling;
wherein when the at least one of first quasi co-location indication information comprises a transmission configuration indicator (TCI) state identifier (ID), after receiving the activation signaling of the secondary cell, the terminal device determines a receive beam based on the TCI state ID carried in the activation signaling, and detects and receives a synchronization signal/physical broadcast channel block (SSB) by using the receive beam determined by using a TCI state corresponding to the TCI state ID, to complete activation of the secondary cell.
2. The method according to claim 1 , wherein the at least one piece of first quasi co-location indication information comprises the TCI state ID, a pilot resource set identifier, or spatial relation indication information.
3. The method according to claim 1 , further comprising:
receiving, by the terminal device, a downlink physical channel or a downlink signal; and
sending an uplink physical channel or an uplink signal in the secondary cell by using a beam indicated by the at least one piece of first quasi co-location indication information.
4. The method according to claim 1 , wherein the method further comprises:
receiving, by the terminal device, second quasi co-location indication information sent by the network device; and
receiving, by the terminal device, a downlink physical channel or a downlink signal and sending an uplink physical channel or an uplink signal in the secondary cell by using a beam indicated in the second quasi co-location indication information.
5. The method according to claim 1 , wherein the activation signaling further comprises indication information of a plurality of component carriers, and each of the at least one piece of first quasi co-location indication information corresponds to one component carrier or one group of component carriers in the plurality of component carriers.
6. The method according to claim 1 , wherein the method further comprises:
receiving, by the terminal device, first indication information sent by the network device, wherein the first indication information is used to indicate that downlink timing of a primary cell is the same as that of the secondary cell, or that a timing advance group (TAG) of a primary cell is the same as that of the secondary cell.
7. A secondary cell activation method, comprising:
generating, by a network device, activation signaling of a secondary cell, wherein the activation signaling comprises at least one piece of first quasi co-location indication information; and
sending, by the network device, the activation signaling;
wherein when the first quasi co-location indication information comprises a transmission configuration indicator (TCI) state identifier (ID), after receiving the activation signaling of the secondary cell, the terminal device determines a receive beam based on the TCI state ID carried in the activation signaling, and detects and receives a synchronization signal/physical broadcast channel block (SSB) by using the receive beam determined by using a TCI state corresponding to the TCI state ID, to complete activation of the secondary cell.
8. The method according to claim 7 , wherein the at least one piece of first quasi co-location indication information comprises the TCI state ID, a pilot resource set identifier, or spatial relation indication information.
9. The method according to claim 7 , further comprising: sending, by the network device, a downlink physical channel or a downlink signal.
10. The method according to claim 7 , wherein the method further comprises:
sending, by the network device, second quasi co-location indication information, wherein the second quasi co-location indication information is used to indicate to the terminal device to receive a downlink physical channel or a downlink signal and send an uplink physical channel or an uplink signal in the secondary cell by using a beam indicated by the second quasi co-location indication information.
11. The method according to claim 7 , wherein the activation signaling further comprises indication information of a plurality of component carriers, and each of the at least one piece of first quasi co-location indication information corresponds to one component carrier or one group of component carriers in the plurality of component carriers.
12. The method according to claim 7 , wherein the method further comprises:
sending, by the network device, first indication information, wherein the first indication information is used to indicate that downlink timing of a primary cell is the same as that of the secondary cell, or that a timing advance group (TAG) of a primary cell is the same as that of the secondary cell.
13. A communication apparatus, comprising:
a receiver, configured to receive activation signaling of a secondary cell sent by a network device, wherein the activation signaling comprises at least one piece of first quasi co-location indication information and wherein the first quasi co-location indication information indicates a spatial relationship between two antenna ports on the network device; and
a processor, configured to activate the secondary cell based on the activation signaling;
wherein when the first quasi co-location indication information is a transmission configuration indicator (TCI) state identifier (ID), after receiving the activation signaling of the secondary cell, the terminal device determines a receive beam based on the TCI state ID carried in the activation signaling, and receives a synchronization signal/physical broadcast channel block (SSB) by using the receive beam determined by using a TCI state corresponding to the TCI state ID, to complete activation of the secondary cell.
14. The apparatus according to claim 13 , wherein the at least one piece of first quasi co-location indication information comprises the TCI state ID, a pilot resource set identifier, or spatial relation indication information.
15. The apparatus according to claim 13 , wherein the receiver is further configured to:
receive a downlink physical channel or a downlink signal and send an uplink physical channel or an uplink signal in the secondary cell by using a beam indicated by using the at least one piece of first quasi co-location indication information.
16. The apparatus according to claim 13 , wherein the receiver is further configured to: receive second quasi co-location indication information sent by the network device; and
receive a downlink physical channel or a downlink signal and send an uplink physical channel or an uplink signal in the secondary cell by using a beam indicated by the second quasi co-location indication information.
17. The apparatus according to claim 13 , wherein the activation signaling further comprises indication information of a plurality of component carriers, and each of the at least one piece of first quasi co-location indication information corresponds to one or one group of the plurality of component carriers.
18. The apparatus according to claim 13 , wherein the receiver is further configured to:
receive first indication information sent by the network device, wherein the first indication information is used to indicate that downlink timing of a primary cell is the same as that of the secondary cell, or that a timing advance group (TAG) of a primary cell is the same as that of the secondary cell.