Electronic device, wireless communication method and computer readable storage medium related to transmission configuration indication (TCI) state
An electronic device that includes a processing circuit configured to: receive information about a number N of candidate transmit beams from a user device, where N is an integer greater than 1; select from the N candidate transmit beams a transmit beam for sending downlink information to the user device; and determine, on the basis of the selected transmit beam, a transmission configuration indication (TCI) state, and send the TCI state to the user device. The electronic device, the wireless communication method and the computer readable storage medium enable a network-side device to notify the user device of the information about transmit beams.
1. An electronic equipment comprising a processing circuit configured to:
receive plural base station transmission beams;
measure K base station transmission beams of the plural base station transmission beams,
wherein K is an integer greater than 1;
report, to a base station, identifications of Channel State Information-Reference Signal (CSI-RS) resources corresponding to N candidate base station transmission beams selected by the electronic equipment from the measured K base station transmission beams;
wherein N is an integer greater than 1 and less than or equal to K,
wherein N and K are predetermined values that correspond to a reporting mode used by the electronic equipment, the reporting mode being set in advance by the base station;
receive, from the base station, Downlink Control Information (DCI) having an indication of a transmission configuration indication (TCI) state;
wherein the TCI state is determined by the base station and represents that there is a quasi co-location (QCL) relation between:
downlink information to be transmitted by the base station to the electronic equipment, and
a Synchronization Signal Block (SSB) signal that has been previously transmitted to the electronic equipment by the base station via one of the N candidate base station transmission beams,
wherein the one of the N candidate base station transmission beams is determined by the base station based on the reported identifications of Channel State Information-Reference Signal (CSI-RS) resources corresponding to the N candidate base station transmission beams; and
receive the downlink information via a user equipment reception beam that was used to receive the SSB signal corresponding to the TCI state.
2. The electronic equipment according to claim 1 , wherein the SSB signal is received by the electronic equipment from the base station via a SSB base station transmission beam determined by the base station, and at least one of the N candidate base station transmission beams is within a radiation range of the SSB base station transmission beam.
3. The electronic equipment according to claim 1 , wherein the processing circuit is further configured to receive the SSB signal from the base station prior to measuring the K base station transmission beams.
4. A method performed by an electronic equipment comprising a processing circuit, the method comprising:
receiving plural base station transmission beams;
measuring K base station transmission beams of the plural base station transmission beams,
wherein K is an integer greater than 1;
reporting, to a base station, identifications of Channel State Information-Reference Signal (CSI-RS) resources corresponding to N candidate base station transmission beams selected by the electronic equipment from the measured K base station transmission beams,
wherein N is an integer greater than 1 and less than or equal to K,
wherein N and K are predetermined values that correspond to a reporting mode used by the electronic equipment, the reporting mode being set in advance by the base station;
receiving, from the base station, Downlink Control Information (DCI) having an indication of a transmission configuration indication (TCI) state;
wherein the TCI state is determined by the base station and represents that there is a quasi co-location (QCL) relation between:
downlink information to be transmitted by the base station to the electronic equipment, and
a Synchronization Signal Block (SSB) signal that has been previously transmitted to the electronic equipment by the base station via one of the N candidate base station transmission beams,
wherein the one of the N candidate base station transmission beams is determined by the base station based on the reported identifications of Channel State Information-Reference Signal (CSI-RS) resources corresponding to the N candidate base station transmission beams; and
receiving the downlink information via a user equipment reception beam that was used to receive the SSB signal corresponding to the TCI state.
5. The method according to claim 4 , wherein the SSB signal is received by the electronic equipment from the base station via a SSB base station transmission beam determined by the base station, and at least one of the N candidate base station transmission beams is within a radiation range of the SSB base station transmission beam.
6. The method according to claim 4 , further comprising:
receiving the SSB signal from the base station prior to measuring the K base station transmission beams.
7. A non-transitory computer readable product containing instructions to cause a processing circuit of an electronic equipment to perform a method, the method comprising:
receiving plural base station transmission beams;
measuring K base station transmission beams of the plural base station transmission beams,
wherein K is an integer greater than 1;
reporting, to a base station, identifications of Channel State Information-Reference Signal (CSI-RS) resources corresponding to N candidate base station transmission beams selected by the electronic equipment from the measured K base station transmission beams;
wherein N is an integer greater than 1 and less than or equal to K,
wherein N and K are predetermined values that correspond to a reporting mode used by the electronic equipment the reporting mode being set in advance by the base station;
receiving, from the base station, Downlink Control Information (DCI) having an indication of a transmission configuration indication (TCI) state;
wherein the TCI state is determined by the base station and represents that there is a quasi co-location (QCL) relation between:
downlink information to be transmitted by the base station to the electronic equipment, and
a Synchronization Signal Block (SSB) signal that has been previously transmitted to the electronic equipment by the base station via one of the N candidate base station transmission beams,
wherein the one of the N candidate base station transmission beams is determined by the base station based on the reported identifications of Channel State Information-Reference Signal (CSI-RS) resources corresponding to the N candidate base station transmission beams; and
receiving the downlink information via a user equipment reception beam that was used to receive the SSB signal.