Control information sending method and receiving method, sender and receiver
Embodiments of the present application relate to the field of communications, and in particular, to a control information sending method and receiving method, a sender and a receiver, which are used for sending DCIs corresponding to DCI types to the receiver, thereby improving simplicity of interference suppression performed by the receiver. In the embodiments of the present application, a sender flexibly and optionally sends a first class of DCIs and/or a second class of DCIs. On one hand, when a receiver performs interference suppression on received interference signals, parameters of interference signals comprised in DCIs corresponding to a type of a received second class of DCIs can be used for interference suppression, thereby improving simplicity of interference suppression performed by the receiver; and on the other hand, when the receiver does not perform interference suppression on the received interference signals, a sender can send DCIs corresponding to a type of a first class of DCIs, and the first class of DCIs does not comprise the parameters of an interference signals, thereby reducing load capacity of data transmission and further reducing data processing complexity of the receiver.
1. A method for transmitting control information, the method comprises steps of:
selecting a type of Downlink Control Information (DCI), the type of DCI comprises at least one of a first type of DCI excluding any parameter of an interference signal received by a receiver and a second type of DCI comprising a parameter of an interference signal received by the receiver; and
transmitting DCI corresponding to selected type of DCI;
wherein selecting a type of DCI comprises:
selecting the type of DCI according to a mapping relationship between a prescribed type of DCI and a system parameter; or
selecting the type of DCI according to a prescribed correspondence relationship between a sub-frame number and the type of DCI; or
selecting the type of DCI according to a type of receiver, and/or an interference suppression scheme.
2. The method according to claim 1 , wherein the selecting the type of DCI comprises:
selecting the type of DCI semi-statically or dynamically.
3. The method according to claim 1 , wherein the method further comprises:
determining a number of blind detections corresponding to each type of DCI; and
transmitting an indicator indicating the number of blind detections corresponding to each type of DCI.
4. The method according to claim 1 , wherein the method further comprises:
creating a mapping relationship between the type of DCI and a system parameter; and
transmitting the mapping relationship between the type of DCI and the system parameter.
5. The method according to claim 1 , wherein the selecting the type of DCI comprises:
selecting types of DCI for sub-frames in groups of sub-frames in the units of the groups of sub-frames.
6. The method according to claim 1 , wherein the method further comprises:
transmitting an indicator indicating the selected type of DCI.
7. A method for receiving control information, the method comprises steps of:
receiving Downlink Control Information (DCI) corresponding to a type of DCI selected by a transmitter, wherein the type of DCI comprises at least one of a first type of DCI excluding any parameter of an interference signal received by a receiver and a second type of DCI comprising a parameter of an interference signal received by the receiver; and
decoding received DCI;
wherein the decoding the received DCI comprises:
decoding the received DCI according to a prescribed type of DCI, the prescribed type of DCI is predefined in standard and is not transmitted in any indicator indicating a type of DCI selected by the transmitter; or
determining a type of DCI corresponding to a system parameter and a received mapping relationship between the type of DCI and the system parameter, and decoding the received DCI according to determined type of DCI; or
determining a type of DCI corresponding to a system parameter and a prescribed mapping relationship between the type of DCI and the system parameter, and decoding the received DCI according to determined type of DCI; or
determining a type of DCI according to a sub-frame number corresponding to the received DCI and a prescribed correspondence relationship between the sub-frame number and the type of DCI, and decoding the received DCI according to determined type of DCI; or
determining a type of DCI according to a type of receiver and/or an interference suppression scheme, and decoding the received DCI according to determined type of DCI.
8. The method according to claim 7 , wherein the method further comprises:
receiving an indicator indicating a number of blind detections corresponding to each type of DCI, and detecting each type of DCI blindly according to the indicator indicating the number of blind detections corresponding to each type of DCI; or
detecting each type of DCI blindly according to a prescribed number of blind detections corresponding to each type of DCI.
9. The method according to claim 7 , wherein a decoding mode corresponding to the type of DCI comprises any one of following modes:
detecting and decoding the first type of DCI;
detecting and decoding the second type of DCI; and
detecting and decoding the first type of DCI and the second type of DCI.
10. A transmitter, comprising a memory configured to store computer-readable programs and at least one processor, wherein the at least one processor is configured to execute the computer-readable programs:
to select a type of Downlink Control Information (DCI), wherein the type of DCI comprises at least one of a first type of DCI excluding any parameter of an interference signal received by a receiver and a second type of DCI comprising a parameter of an interference signal received by the receiver; and
to transmit DCI corresponding to selected type of DCI;
wherein the at least one processor is configured to execute the computer-readable programs to select the DCI by:
selecting the type of DCI according to a mapping relationship between a prescribed type of DCI and a system parameter; or
selecting the type of DCI according to a prescribed correspondence relationship between a sub-frame number and the type of DCI; or
selecting the type of DCI according to a type of receiver, and/or an interference suppression scheme.
11. The transmitter according to claim 10 , wherein the at least one processor is configured to execute the computer-readable programs to select a type of DCI by: selecting the type of DCI semi-statically or dynamically.
12. The transmitter according to claim 10 , wherein the at least one processor is further configured to execute the computer-readable programs:
to determine a number of blind detections corresponding to each type of DCI; and
the at least one processor is further configured to execute the computer-readable programs:
to transmit an indicator indicating the number of blind detections corresponding to each type of DCI.
13. The transmitter according to claim 10 , wherein the at least one processor is further configured to execute the computer-readable programs:
to create a mapping relationship between the type of DCI and a system parameter; and
the at least one processor is further configured to execute the computer-readable programs:
to transmit the mapping relationship between the type of DCI and the system parameter.
14. The transmitter according to claim 10 , wherein the at least one processor is configured to execute the computer-readable programs to select a type of DCI by:
selecting types of DCI for sub-frames in groups of sub-frames in units of the groups of sub-frames.
15. The transmitter according to claim 10 , wherein the at least one processor is further configured to execute the computer-readable programs:
to transmit an indicator indicating the selected type of DCI.
16. A receiver, comprising a memory configured to store computer-readable programs and at least one processor, wherein the at least one processor is configured to execute the computer-readable programs:
to receive Downlink Control Information (DCI) corresponding to a type of DCI selected by a transmitter, wherein the type of DCI comprises at least one of a first type of DCI excluding any parameter of an interference signal received by a receiver and a second type of DCI comprising a parameter of an interference signal received by the receiver; and
to decode received DCI;
wherein the at least one processor is configured to execute the computer-readable programs to decode received DCI by:
decoding the received DCI according to a prescribed type of DCI, the prescribed type of DCI is predefined in standard and is not transmitted in any indicator indicating a type of DCI selected by the transmitter; or
the at least one processor is further configured to execute the computer-readable programs:
to determine a type of DCI corresponding to a system parameter and a received mapping relationship between the type of DCI and the system parameter, and to decode the received DCI according to determined type of DCI; or
to determine a type of DCI corresponding to a system parameter and a prescribed mapping relationship between the type of DCI and the system parameter, and to decode the received DCI according to determined type of DCI; or
to determine a type of DCI according to a sub-frame number corresponding to the received DCI and a prescribed correspondence relationship between the sub-frame number and the type of DCI, and to decode the received DCI according to determined type of DCI; or
to determine a type of DCI according to a type of receiver and/or an interference suppression scheme, and decoding the received DCI according to determined type of DCI.
17. The receiver according to claim 16 , wherein the at least one processor is further configured to execute the computer-readable programs:
to detect each type of DCI blindly according to a received indicator indicating a number of blind detections corresponding to each type of DCI; or
to detect each type of DCI blindly according to a prescribed number of blind detections corresponding to each type of DCI.
18. The receiver according to claim 16 , wherein a decoding mode corresponding to the type of DCI includes any one of following modes:
detecting and decoding the first type of DCI;
detecting and decoding the second type of DCI; and
detecting and decoding the first type of DCI and the second type of DCI.