Information transmission method and apparatus
Embodiments of this application disclose an information transmission method and an apparatus. The method includes: sending, by a terminal to a base station, capability indication information used to indicate whether the terminal supports non-coherent joint transmission; and receiving downlink control information sent by the base station, where the downlink control information is based on the capability indication information. According to the embodiments of this application, the base station can know whether the terminal supports NCJT, so as to select an appropriate transmission mode.
1. A method for information transmission comprising:
sending, to a base station, capability indication information used to indicate whether a terminal supports non-coherent joint transmission, wherein the capability indication information is used to indicate whether the terminal supports receiving at least two pieces of downlink control information;
receiving a parameter of the downlink control information from the base station, wherein the parameter comprises a maximum quantity of to-be-sent downlink control information and the parameter is based on the capability indication information; and
receiving downlink control information from the base station, wherein the downlink control information is based on the capability indication information.
2. The method according to claim 1 ,
wherein the parameter further comprises a downlink control information format.
3. The method according to claim 1 , wherein the capability indication information is further used to indicate whether the terminal supports a downlink control information format corresponding to the non-coherent joint transmission.
4. The method according to claim 1 , wherein the capability indication information further comprises whether the terminal has a capability of a successive interference cancellation receiver or a parallel interference cancellation receiver.
5. The method according to claim 1 , wherein the capability indication information is carried in higher layer signaling.
6. A method for information transmission comprising:
receiving capability indication information that is received from a terminal and used to indicate whether the terminal supports non-coherent joint transmission, wherein the capability indication information is used to indicate whether the terminal supports receiving at least two pieces of downlink control information;
determining a parameter of the downlink control information based on the capability indication information, wherein the parameter comprises a maximum quantity of to-be-sent downlink control information; and
sending the downlink control information and the parameter to the terminal based on the capability indication information.
7. The method according to claim 6 , wherein the sending the downlink control information and the parameter to the terminal based on the capability indication information comprises:
sending higher layer signaling to the terminal to indicate a quantity of downlink control information that needs to be detected; and
sending the downlink control information to the terminal based on the parameter.
8. The method according to claim 6 , wherein the capability indication information is further used to indicate whether the terminal supports a downlink control information format corresponding to the non-coherent joint transmission.
9. The method according to claim 6 , wherein the capability indication information further comprises whether the terminal has a capability of a successive interference cancellation receiver or a parallel interference cancellation receiver.
10. The method according to claim 8 , wherein the capability indication information is comprised in higher layer signaling.
11. An apparatus comprising:
a processor;
and a memory, wherein the memory is configured to store a program code including instructions, which, when executed by the processor, causes the processor to perform a method comprising:
sending, to a base station, capability indication information used to indicate whether a terminal supports non-coherent joint transmission, wherein the capability indication information is used to indicate whether the terminal supports receiving at least two pieces of downlink control information;
receiving a parameter of the downlink control information from the base station, wherein the parameter comprises a maximum quantity of to-be-sent downlink control information and the parameter is based on the capability indication information; and
receiving the downlink control information from the base station, wherein the downlink control information is based on the capability indication information.
12. The apparatus according to claim 11 , wherein the parameter further comprises a downlink control information format.
13. The apparatus according to claim 11 , wherein the capability indication information is further used to indicate whether the terminal supports a downlink control information format corresponding to the non-coherent joint transmission.
14. The apparatus according to claim 11 , wherein the capability indication information further comprises whether the terminal has a capability of a successive interference cancellation receiver or a parallel interference cancellation receiver.
15. The apparatus according to claim 11 , wherein the capability indication information is carried in higher layer signaling.
16. An apparatus comprising:
a processor; and
a memory, wherein the memory is configured to store a program code including instructions, which, when executed by the processor, causes the processor to perform a method comprising:
receiving capability indication information that is from a terminal and used to indicate whether the terminal supports non-coherent joint transmission, wherein the capability indication information is used to indicate whether the terminal supports receiving at least two pieces of downlink control information;
determining a parameter of the downlink control information based on the capability indication information and whether a base station supports the non-coherent joint transmission, wherein the parameter comprises a maximum quantity of to-be-sent downlink control information; and
sending the downlink control information and the parameter to the terminal based on the capability indication information.
17. The apparatus according to claim 16 , wherein the program code further comprises instructions, which, when executed by the processor, causes the processor to perform the following:
sending higher layer signaling to the terminal to indicate a quantity of downlink control information that needs to be detected; and
sending the downlink control information to the terminal based on the parameter when the parameter is sent by using the higher layer signaling.
18. The apparatus according to claim 16 , wherein the capability indication information is further used to indicate whether the terminal supports a downlink control information format corresponding to the non-coherent joint transmission.
19. The apparatus according to claim 16 , wherein the capability indication information further comprises whether the terminal has a capability of a successive interference cancellation receiver or a parallel interference cancellation receiver.
20. The apparatus according to claim 16 , wherein the capability indication information is comprised in higher layer signaling.