Method and apparatus for transmitting uplink control information and communication system
A method and apparatus for transmitting uplink control information and a communication system. The method includes a terminal equipment transmits uplink control information, the uplink control information being related to at least two TRPs. The uplink control information is transmitted in a manner of spatial diversity. At the terminal side, the same data may reach a network side via different spatial domain paths or via different TRPs (transmission and reception points). In a case where blockage occurs in a path, other paths may still continue to operate, thereby ensuring high reliability of the uplink control information. The number of retransmissions of the uplink control information may be avoided or reduced, thereby lowering transmission latency of uplink data.
1 . An apparatus for transmitting uplink control information, the apparatus comprises:
a receiver configured to receive indication information transmitted by a network device, the indication information indicating that the uplink control information is related to at least two spatial relations or at least two power control parameters; and
a transmitter configured to transmit the uplink control information, by using the at least two spatial relations or at least two power control parameters,
wherein the indication information applies to a PUCCH resource with an ID.
2 . The apparatus according to claim 1 , wherein,
the at least two spatial relations or at least two power control parameters include a first spatial relation or a first power control parameter and a second spatial relation or a second power control parameter,
the first spatial relation or the first power control parameter is used to transmit first N1 symbols of the uplink control information, and
the second spatial relation or the second power control parameter is related used to transmit second N1 symbols of the uplink control information.
3 . The apparatus according to claim 2 , wherein remaining symbols of the uplink control information are related respectively to the first spatial relation or the first power control parameter and the second spatial relation or the second power control parameter in units of N1 symbols.
4 . The apparatus according to claim 1 ,
the at least two spatial relations or at least two power control parameters include a first spatial relation or a first power control parameter and a second spatial relation or a second power control parameter,
the first spatial relation or the first power control parameter is related, in a slot with which the uplink control information associated, a first time domain portion of the uplink control information, and
the second spatial relation or the second power control parameter is related to remaining time domain portion of the uplink control information.
5 . The apparatus according to claim 1 , wherein,
the at least two spatial relations or at least two power control parameters includes a first spatial relation or a first power control parameter and a second spatial relation or a second power control parameter,
the first spatial relation or the first power control parameter is related to first N2 slots of the uplink control information, and
the second spatial relation or the second power control parameter is related to second N2 slots of the uplink control information.
6 . The apparatus according to claim 5 , wherein remaining slots of the uplink control information are related respectively to the first spatial relation or the first power control parameter and the second spatial relation or the second power control parameter in units of N2 slots.
7 . The apparatus according to claim 1 , wherein the transmitter performs frequency hopping on transmission of the uplink control information according to the at least two spatial relations or at least two power control parameters.
8 . The apparatus according to claim 7 , wherein the frequency hopping is performed according to a slot where the uplink control information is located.
9 . The apparatus according to claim 7 , wherein the frequency hopping is performed at a slot where the uplink control information is located according to a time domain portion corresponding to the uplink control information.
10 . The apparatus according to claim 1 , wherein the transmitter performs frequency hopping on transmission of the uplink control information according to at least one of a transmission occasion, a repetition, and a time-frequency resource associated with one of the at least two spatial relations or at least two power control parameters.
11 . The apparatus according to claim 1 , wherein the uplink control information is PUCCH repetition.
12 . The apparatus according to claim 1 , wherein, the apparatus further comprises:
a processor, configured to determine a length of an orthogonal cover code of the uplink control information according to a time domain length of a time-domain resource, a repetition or a transmission occasion related to the uplink control information; wherein the time-domain resource, the repetition or the transmission occasion is related to one of the at least two spatial relations or at least two power control parameters.
13 . The apparatus according to claim 1 , wherein, the apparatus further comprises:
a processor, configured to generate a sequence corresponding to the uplink control information according to the at least two spatial relations or at least two power control parameters.
14 . The apparatus according to claim 1 , wherein the indication information is contained in RRC signaling, parameters indicated by the RRC signaling are common for all resources of a PUCCH format.
15 . The apparatus according to claim 1 , wherein the indication information is contained in RRC signaling, the RRC signaling acting on a PUCCH resource with an ID.
16 . The apparatus according to claim 1 , wherein the at least two spatial relations or at least two power control parameters are equivalent to at least one of the following:
a transmission configuration indication state;
a spatial relation;
a reference signal;
a set of reference signal;
an SRS resource group;
a spatial domain filter;
a power control parameter; and
a group of time alignment (TA) related parameters.
17 . The apparatus according to claim 1 , wherein a format of a resource corresponding to the uplink control information is at least one of the following:
PUCCH format 0;
PUCCH format 1;
PUCCH format 2;
PUCCH format 3;
PUCCH format 4.
18 . An apparatus for indicating transmission of uplink control information, wherein the apparatus comprises:
a transmitter configured to transmit indication information to a terminal equipment, the indication information indicating that uplink control information is related to at least two spatial relations or at least two power control parameters, and
a receiver configured to receive the uplink control information;
wherein the indication information applies to a PUCCH resource with an ID.
19 . The apparatus according to claim 18 , wherein the at least two spatial relations or at least two power control parameters are equivalent to at least one of the following:
a transmission configuration indication state;
a spatial relation;
a reference signal;
a set of reference signal;
an SRS resource group;
a spatial domain filter;
a power control parameter; and
a group of time alignment (TA) related parameters.