Method for transmitting downlink control information, network side device and terminal device

1. A method for transmitting Downlink Control Information (DCI), comprising:

determining, by a network side device, a transmission manner adopted to send downlink data to a terminal device; and

sending, by the network side device, DCI to the terminal device, the DCI carrying first indication information which indicates the transmission manner adopted by the network side device to send the downlink data to the terminal device;

wherein the DCI further carries at least one of: pilot signal configuration information, first associated information and second associated information, wherein the first associated information indicates whether a channel estimated by one pilot signal port is able to be deduced according to a channel estimated by another pilot signal port or not, and the second associated information indicates whether a channel estimated by a pilot signal port is able to be deduced according to a channel estimated by another signal or not, the other signal being at least one of: a broadcast signal, a synchronization signal and a control signal sent to the terminal device by the network side device.

2. The method as claimed in claim 1 , wherein the transmission manner comprises at least one of: open-loop space division multiplexing, closed-loop space division multiplexing, transmission diversity, open-loop Multiple Input Multiple Output (MIMO), closed-loop MIMO and quasi-open-loop MIMO.

3. The method as claimed in claim 1 , wherein the DCI comprises a first field, the first indication information is a value of one or more bits in the first field, and different values of the one or more bits in the first field indicate different transmission manners;

or,

the DCI comprises a second field, the first indication information is a value of one or more bits in the second field and different values of the one or more bits in the second field indicate different transmission manners and part of control information in the DCI;

or,

the DCI comprises a feature code, the first indication information is the feature code, different values of the feature code indicate different transmission manners, and the feature code is born in a field occupied by an error-detecting code of the DCI in a manner of scrambling the error-detecting code based on the feature code.

4. The method as claimed in claim 1 , wherein the pilot signal configuration information comprises at least one of: a number of pilot signal ports, a pilot signal position, a pilot signal density and a pilot signal scrambling information.

5. The method as claimed in claim 1 , wherein the DCI further carries second indication information which indicates whether the terminal device receives the downlink data in a multi-user MIMO mode or not.

6. The method as claimed in claim 1 , wherein the DCI sent to the terminal device by the network side device in different transmission manners has a same length.

7. A method for transmitting Downlink Control Information (DCI), comprising:

receiving, by a terminal device, DCI sent by a network side device, the DCI carrying first indication information which indicates a transmission manner adopted by the network side device to send downlink data to the terminal device; and

determining, by the terminal device, a transmission manner adopted to receive the downlink data according to the first indication information;

wherein the DCI further carries at least one of: pilot signal configuration information, first associated information and second associated information, the first associated information indicates whether a channel estimated by one pilot signal port is able to be deduced according to a channel estimated by another pilot signal port or not, and the second associated information indicates whether a channel estimated by a pilot signal port is able to be deduced according to a channel estimated by another signal or not, the other signal being at least one of: a broadcast signal, a synchronization signal and a control signal sent to the terminal device by the network side device.

8. The method as claimed in claim 7 , wherein the transmission manner comprises at least one of: open-loop space division multiplexing, closed-loop space division multiplexing, transmission diversity, open-loop Multiple Input Multiple Output (MIMO), closed-loop MIMO and quasi-open-loop MIMO.

9. The method as claimed in claim 7 , wherein the DCI comprises a first field, the first indication information is a value of one or more bits in the first field, and different values of the one or more bits in the first field indicate different transmission manners.

10. The method as claimed in claim 7 , wherein the DCI comprises a second field, the first indication information is a value of one or more bits in the second field and different values of the one or more bits in the second field indicate different transmission manners and part of control information in the DCI.

11. The method as claimed in claim 7 , wherein the DCI comprises a feature code, the first indication information is the feature code, different values of the feature code indicate different transmission manners, and the feature code is born in a field occupied by an error-detecting code of the DCI in a manner of scrambling the error-detecting code based on the feature code.

12. The method as claimed in claim 7 , wherein the pilot signal configuration information comprises at least one of: a number of pilot signal ports, a pilot signal position, a pilot signal density and a pilot signal scrambling information.

13. The method as claimed in claim 7 , wherein the DCI further carries second indication information which indicates whether the terminal device receives the downlink data in a multi-user MIMO mode or not.

14. A terminal device, comprising:

at least one processor; and

a computer readable storage, coupled to the at least one processor and storing at least one computer executable instructions which, when being executed by the at least one processor, cause the at least one processor to carry out following actions:

receiving Downlink Control Information (DCI) sent by a network side device, the DCI carrying first indication information which indicates a transmission manner adopted by the network side device to send downlink data to the terminal device; and

determining a transmission manner adopted to receive the downlink data according to the first indication information;

wherein the DCI further carries at least one of: pilot signal configuration information, first associated information and second associated information, the first associated information indicates whether a channel estimated by one pilot signal port is able to be deduced according to a channel estimated by another pilot signal port or not, and the second associated information indicates whether a channel estimated by a pilot signal port is able to be deduced according to a channel estimated by another signal or not, the other signal being at least one of: a broadcast signal, a synchronization signal and a control signal sent to the terminal device by the network side device.

15. The terminal device as claimed in claim 14 , wherein the transmission mode comprises at least one of: open-loop space division multiplexing, closed-loop space division multiplexing, transmission diversity, open-loop Multiple Input Multiple Output (MIMO), closed-loop MIMO and quasi-open-loop MIMO.

16. The terminal device as claimed in claim 14 , wherein

the DCI comprises a first field, the first indication information is a value of one or more bits in the first field, and different values of the one or more bits in the first field indicate different transmission manners;

or,

the DCI comprises a second field, the first indication information is a value of one or more bits in the second field and different values of the one or more bits in the second field indicate different transmission manners and part of control information in the DCI;

or,

the DCI comprises a feature code, the first indication information is the feature code, different values of the feature code indicate different transmission manners, and the feature code is born in a field occupied by an error-detecting code of the DCI in a manner of scrambling the error-detecting code based on the feature code.

17. The terminal device as claimed in claim 14 , wherein the DCI further carries second indication information which indicates whether the terminal device receives the downlink data in a multi-user MIMO mode or not.