Method and device for transmitting control information
Provided in embodiments of the present disclosure are a method and device for transmitting control information. In an embodiment of the present disclosure, the method includes a base station determining to repeatedly transmit DCI; and the base station repeatedly causing the DCI to be carried on at least two PDCCHs used for repeated DCI transmission, and transmitting same. When a terminal is unable to successfully detect some of PDCCHs for repeated DCI transmission due to a blockage or interference, the terminal can still perform detection on the remaining PDCCHs to obtain DCI, to enhance the reliability of DCI transmission.
1 . A method for transmitting control information, comprising:
determining, by a base station, to repeatedly transmit Downlink Control Information (DCI);
transmitting, by the base station, the DCI by carrying the DCI repeatedly on at least two Physical Downlink Control Channels (PDCCHs) used for repeatedly transmitting DCI; wherein the method further comprises:
sending, by the base station, a rule for determining an association relationship between transmission resources to a terminal through a high-layer signaling; wherein the association relationship is an association relationship between transmission resources used for repeatedly transmitting DCI, and the association relationship between transmission resources comprises an association relationship between at least one kind of related information of PDCCHs used for repeatedly transmitting DCI; wherein the association relationship comprises at least one of:
an association relationship between PDCCH candidates to which the PDCCHs used for repeatedly transmitting the DCI belong, wherein the high-layer signaling indicates first Z or last Z PDCCH candidates ranked in order of PDCCH serial numbers in a search space as transmission resources corresponding to the PDCCHs used for repeatedly transmitting the DCI, wherein Z is an agreed value or a configuration value; or
an association relationship between search spaces to which the PDCCHs used for repeatedly transmitting the DCI belong, wherein the high-layer signaling indicates first Y or last Y search spaces ranked in order of Control Resource Set (CORESET) serial numbers as transmission resources corresponding to the PDCCHs used for repeatedly transmitting the DCI, wherein Y is an agreed value or a configuration value;
wherein the DCI sent by at least one of the at least two PDCCHs comprises repeated- transmission-resource indication information used to indicate: other PDCCH that repeatedly transmits the DCI in the at least two PDCCHs, or related information of the other PDCCH;
wherein the related information of the other PDCCH indicated by the repeated-transmission-resource indication information comprises at least one of:
a TCI state of a CORESET to which the other PDCCH belongs;
a PDCCH candidate to which the other PDCCH belongs;
a search space to which the other PDCCH belongs;
a CORESET to which the other PDCCH belongs; or
an aggregation level of the other PDCCH; and
wherein the determining, by a base station, to repeatedly transmit DCI comprises:
determining, by the base station, to repeatedly transmit DCI according to a channel detection situation or feedback of the terminal.
2 . The method of claim 1 , wherein the at least two PDCCHs used for repeatedly transmitting DCI are from N PDCCH candidates of at least two CORESETs; wherein each of the N PDCCH candidates corresponds to a Transmission Configuration Indicator state (TCI state), and N is an integer greater than 1.
3 . The method of claim 1 , wherein the base station pre-agrees with the terminal on a rule for determining the association relationship between transmission resources.
4 . The method of claim 1 , wherein the association relationship further comprises at least one of:
an association relationship between TCI states of CORESETs to which the PDCCHs used for repeatedly transmitting the DCI belong, wherein the high-layer signaling indicates CORESETs corresponding to TCI states of CORESETs with odd CORESET serial numbers as transmission resources corresponding to the PDCCHs used for repeatedly transmitting the DCI, or the high-layer signaling indicates CORESETs corresponding to TCI states of CORESETs with even CORESET serial numbers as transmission resources corresponding to the PDCCHs used for repeatedly transmitting the DCI;
an association relationship between CORESETs to which the PDCCHs used for repeatedly transmitting the DCI belong, wherein the high-layer signaling indicates CORESETs with a remainder of 0 after CORESET serial numbers modulo x as transmission resources corresponding to the PDCCHs used for repeatedly transmitting the DCI, wherein x is an integer greater than 1; or
an association relationship between aggregation levels of the PDCCHs used for repeatedly transmitting the DCI, wherein the high-layer signaling indicates PDCCHs corresponding to PDCCH aggregation levels having an appointed multiple relation as the PDCCHs used for repeatedly transmitting the DCI.
5 . A base station, comprising:
a processor, a memory and a transceiver;
the transceiver is configured to receive and send data under control of the processor;
the memory is configured to store computer instructions;
the processor is configured to read the computer instructions to perform following operations:
determining to repeatedly transmitting Downlink Control Information (DCI);
carrying the DCI repeatedly on at least two Physical Downlink Control Channels (PDCCHs) used for repeatedly transmitting DCI to send the DCI;
wherein the operations further comprise:
sending a rule for determining an association relationship between transmission resources to a terminal through a high-layer signaling; wherein the association relationship is an association relationship between transmission resources used for repeatedly transmitting DCI, and the association relationship between transmission resources comprises an association relationship between at least one kind of related information of PDCCHs used for repeatedly transmitting DCI; wherein the association relationship comprises at least one of:
an association relationship between PDCCH candidates to which the PDCCHs used for repeatedly transmitting the DCI belong, wherein the high-layer signaling indicates first Z or last Z PDCCH candidates ranked in order of PDCCH serial numbers in a search space as transmission resources corresponding to the PDCCHs used for repeatedly transmitting the DCI, wherein Z is an agreed value or a configuration value; or
an association relationship between search spaces to which the PDCCHs used for repeatedly transmitting the DCI belong, wherein the high-layer signaling indicates first Y or last Y search spaces ranked in order of Control Resource Set (CORESET) serial numbers as transmission resources corresponding to the PDCCHs used for repeatedly transmitting the DCI, wherein Y is an agreed value or a configuration value;
wherein the DCI sent by at least one of the at least two PDCCHs comprises repeated-transmission-resource indication information used to indicate: other PDCCH that repeatedly transmits the DCI in the at least two PDCCHs, or related information of the other PDCCH;
wherein the related information of the other PDCCH indicated by the repeated-transmission-resource indication information comprises at least one of:
a TCI state of a CORESET to which the other PDCCH belongs;
a PDCCH candidate to which the other PDCCH belongs;
a search space to which the other PDCCH belongs;
a CORESET to which the other PDCCH belongs; or
an aggregation level of the other PDCCH; and
wherein the determining, by a base station, to repeatedly transmit DCI comprises:
determining, by the base station, to repeatedly transmit DCI according to a channel detection situation or feedback of the terminal.
6 . The base station of claim 5 , wherein the at least two PDCCHs used for DCI repeated transmission are from N PDCCH candidates of at least two CORESETs; wherein each of the N PDCCH candidates corresponds to a Transmission Configuration Indicator state (TCI state), and N is an integer greater than 1 .
7 . The base station of claim 5 , wherein the base station pre-agrees with the terminal on a rule for determining the association relationship between transmission resources.
8 . The base station of claim 5 , wherein the association relationship further comprises at least one of:
an association relationship between TCI states of CORESETs to which the PDCCHs used for repeatedly transmitting the DCI belong, wherein the high-layer signaling indicates CORESETs corresponding to TCI states of CORESETs with odd CORESET serial numbers as transmission resources corresponding to the PDCCHs used for repeatedly transmitting the DCI, or the high-layer signaling indicates CORESETs corresponding to TCI states of CORESETs with even CORESET serial numbers as transmission resources corresponding to the PDCCHs used for repeatedly transmitting the DCI;
an association relationship between CORESETs to which the PDCCHs used for repeatedly transmitting the DCI belong, wherein the high-layer signaling indicates CORESETs with a remainder of 0 after CORESET serial numbers modulo x as transmission resources corresponding to the PDCCHs used for repeatedly transmitting the DCI, wherein x is an integer greater than 1; or
an association relationship between aggregation levels of the PDCCHs used for repeatedly transmitting the DCI, wherein the high-layer signaling indicates PDCCHs corresponding to PDCCH aggregation levels having an appointed multiple relation as the PDCCHs used for repeatedly transmitting the DCI.