Control information sending/receiving method and device
A control information sending/receiving method and device are provided, to implement indicating a time-frequency location of a control channel to a terminal device in a 5G NR system or a future evolved LTE system. The method includes: receiving, by a terminal device, broadcast information; determining, from at least two predefined time-domain locations, a time-domain location of a broadcast channel carrying the broadcast information; determining a time-domain location of a control channel based on the time-domain location of the broadcast channel; and performing control channel detection in the determined time-domain location of the control channel.
1. A method comprising:
sending, by an apparatus, broadcast information in a broadcast channel, wherein the broadcast channel is located in a synchronization signal block;
determining, by the apparatus, a time-domain location of a control channel based on a time-domain location of the synchronization signal block, wherein the time-domain location of the synchronization signal block is one of at least two predefined time-domain locations; and
sending, by the apparatus, to a terminal device, the control channel in the time-domain location of the control channel.
2. The method according to claim 1 , wherein determining the time-domain location of the control channel includes determining the time-domain location of a control channel based on the time-domain location of the synchronization signal block, and an association between the time-domain location of the synchronization signal block and the time-domain location of the control channel.
3. The method according to claim 1 , wherein a subcarrier width of the broadcast channel is 30 kHz, a subcarrier width of the control channel is 30 kHz, and a time-domain resource set of control channels comprises a symbol with a number 0 and a symbol with a number 1, and wherein determining the time-domain location of the control channel includes:
determining that the time-domain location of the control channel is a symbol with a number 0 in response to the time-domain location of the synchronization signal block being symbols with numbers 2 to 5; or
determining that the time-domain location of the control channel is a symbol with a number 1 in response to the time-domain location of the synchronization signal block being symbols with numbers 6 to 9.
4. The method according to claim 1 , wherein a subcarrier width of the broadcast channel is 30 kHz, a subcarrier width of the control channel is 30 kHz, and a time-domain resource set of control channels comprises symbols with numbers 0 to 1 and symbols with numbers 2 to 3, wherein determining the time-domain location of the control channel includes:
determining that the time-domain location of the control channel is symbols with numbers 0 to 1 in response to the time-domain location of the synchronization signal block being symbols with numbers 4 to 7; or
determining that the time-domain location of the control channel is symbols with numbers 2 to 3 in response to the time-domain location of the synchronization signal block being symbols with numbers 8 to 11.
5. The method according to claim 1 , wherein the broadcast information indicates a time-domain resource set of control channels, and wherein determining the time-domain location of the control channel includes determining the time-domain location of the control channel from a time-domain resource set of control channels.
6. The method according to claim 1 , wherein a subcarrier width of the broadcast channel is 15 kHz, and a subcarrier width of the control channel is 15 kHz, wherein determining the time-domain location of the control channel includes:
determining that the time-domain location of the control channel is symbols with numbers 0 to 1 in response to the time-domain location of the synchronization signal block being symbols with numbers 2 to 5.
7. The method according to claim 1 , wherein a subcarrier width of the broadcast is 15 kHz, and a subcarrier width used by the control channel is 15 kHz, wherein determining the time-domain location of the control channel includes:
determining that the time-domain location of the control channel is a symbol with a number 0 in response to the time-domain location of the synchronization signal block being symbols with numbers 2 to 5.
8. An apparatus comprising:
a storage medium including executable instructions; and
a processor;
wherein the executable instructions, when executed by the processor, cause the apparatus to:
send broadcast information in a broadcast channel, wherein the broadcast channel is located in a synchronization signal block;
determine a time-domain location of a control channel based on a time-domain location of the synchronization signal block, wherein the time-domain location of the synchronization signal block is one of at least two predefined time-domain locations; and
send, to a terminal device, the control channel in the time-domain location of the control channel.
9. The apparatus according to claim 8 , wherein determining the time-domain location of the control channel includes determining the time-domain location of a control channel based on the time-domain location of the synchronization signal block, and an association between the time-domain location of the synchronization signal block and the time-domain location of the control channel.
10. The apparatus according to claim 8 , wherein a subcarrier width of the broadcast channel is 30 kHz, a subcarrier width of the control channel is 30 kHz, and a time-domain resource set of control channels comprises a symbol with a number 0 and a symbol with a number 1, wherein determining the time-domain location of the control channel includes:
determining that the time-domain location of the control channel is a symbol with a number 0 in response to the time-domain location of the synchronization signal block being symbols with numbers 2 to 5; or
determining that the time-domain location of the control channel is a symbol with a number 1 in response to the time-domain location of the synchronization signal block being symbols with numbers 6 to 9.
11. The apparatus according to claim 8 , wherein a subcarrier width of the broadcast channel is 30 kHz, a subcarrier width of the control channel is 30 kHz, and a time-domain resource set of control channels comprises symbols with numbers 0 to 1 and symbols with numbers 2 to 3, wherein determining the time-domain location of the control channel includes:
determining that the time-domain location of the control channel is symbols with numbers 0 to 1 in response to the time-domain location of the synchronization signal block being symbols with numbers 4 to 7; or
determining that the time-domain location of the control channel is symbols with the numbers 2 to 3 in response to the time-domain location of the synchronization signal block being symbols with numbers 8 to 11.
12. The apparatus according to claim 8 , wherein a subcarrier width of the broadcast channel is 15 kHz, and a subcarrier width of the control channel is 15 kHz, wherein determining the time-domain location of the control channel includes:
determining that the time-domain location of the control channel is symbols with numbers 0 to 1 in response to the time-domain location of the synchronization signal block being symbols with numbers 2 to 5.
13. The apparatus according to claim 8 , wherein a subcarrier width of the broadcast is 15 kHz, and a subcarrier width used by the control channel is 15 kHz, wherein determining the time-domain location of the control channel includes:
determining that the time-domain location of the control channel is a symbol with a number 0 in response to the time-domain location of the synchronization signal block being symbols with numbers 2 to 5.
14. The apparatus according to claim 8 , wherein the broadcast information indicates a time-domain resource set of control channels, and wherein determining the time-domain location of the control channel includes:
determining the time-domain location of the control channel from the time-domain resource set of control channels.
15. A non-transitory computer-readable storage medium comprising executable instructions, wherein the executable instructions, when executed by a computer, cause the computer to:
send broadcast information in a broadcast channel, wherein the broadcast channel is located in a synchronization signal block;
determine a time-domain location of a control channel based on a time-domain location of the synchronization signal block, wherein the time-domain location of the synchronization signal block is one of at least two predefined time-domain locations; and
send, to a terminal device, the control channel in the time-domain location of the control channel.
16. The non-transitory computer-readable storage medium according to claim 15 , wherein determining the time-domain location of the control channel includes determining the time-domain location of a control channel based on the time-domain location of the synchronization signal block, and an association between the time-domain location of the synchronization signal block and the time-domain location of the control channel.
17. The non-transitory computer-readable storage medium according to claim 15 , wherein a subcarrier width of the broadcast channel is 30 kHz, a subcarrier width of the control channel is 30 kHz, and a time-domain resource set of control channels comprises a symbol with a number 0 and a symbol with a number 1, wherein determining the time-domain location of the control channel includes:
determining that the time-domain location of the control channel is a symbol with a number 0 in response to the time-domain location of the synchronization signal block being symbols with numbers 2 to 5; or
determining that the time-domain location of the control channel is a symbol with a number 1 in response to the time-domain location of the synchronization signal block being symbols with numbers 6 to 9.
18. The non-transitory computer-readable storage medium according to claim 15 , wherein a subcarrier width of the broadcast channel is 30 kHz, a subcarrier width of the control channel is 30 kHz, and a time-domain resource set of control channels comprises symbols with numbers 0 to 1 and symbols with numbers 2 to 3, wherein determining the time-domain location of the control channel includes:
determining that the time-domain location of the control channel is symbols with numbers 0 to 1 in response to the time-domain location of the synchronization signal block being symbols with numbers 4 to 7; or
determining that the time-domain location of the control channel is symbols with the numbers 2 to 3 in response to the time-domain location of the synchronization signal block is symbols with numbers 8 to 11.
19. The non-transitory computer-readable storage medium according to claim 15 , wherein the broadcast information indicates a time-domain resource set of control channels, and wherein determining the time-domain location of the control channel includes determining the time-domain location of the control channel from a time-domain resource set of control channels.
20. The non-transitory computer-readable storage medium according to claim 15 , wherein a subcarrier width of the broadcast channel is 15 kHz, and a subcarrier width of the control channel is 15 kHz, wherein determining the time-domain location of the control channel includes:
determining that the time-domain location of the control channel is symbols with numbers 0 to 1 in response to the time-domain location of the synchronization signal block being symbols with numbers 2 to 5; or
determining that the time-domain location of the control channel is a symbol with a number 0 in response to the time-domain location of the synchronization signal block being symbols with numbers 2 to 5.