Beam control for repetitions
Transmission repetition may be used in wireless communications. Control channel repetition may be used for scheduling communications between a base station and a wireless device. A time period between the control channel and the scheduled communications may be less than a threshold time period. The wireless device may determine, for communicating with the base station, a wireless resource corresponding to a default resource pool, a resource pool used for at least one repetition of the control channel, and/or based on a resource pool indicated via the control channel.
1. A method comprising:
receiving, by a wireless device via at least one of a first control resource set (CORESET) or a second CORESET, repetitions of downlink control information (DCI) scheduling a downlink signal, wherein a time offset between the DCI and the downlink signal is less than a threshold;
based on a first CORESET pool index of the first CORESET and a second CORESET pool index of the second CORESET being different, determining a default CORESET pool index by determining, among the first CORESET pool index and the second CORESET pool index, a lowest CORESET pool index or a highest CORESET pool index; and
receiving the downlink signal using a CORESET associated with a lowest CORESET index among one or more CORESETs associated with the default CORESET pool index.
2. The method of claim 1 , wherein the receiving the downlink signal using the CORESET associated with the lowest CORESET index among the one or more CORESETs comprises receiving the downlink signal based on a transmission configuration indicator (TCI) state of the CORESET associated with the lowest CORESET index among the one or more CORESETs.
3. The method of claim 1 , wherein the receiving the downlink signal using the CORESET associated with the lowest CORESET index among the one or more CORESETs comprises receiving the downlink signal based on at least one demodulation reference signal (DMRS) port of the downlink signal being quasi co-located with a reference signal of the CORESET associated with the lowest CORESET index among the one or more CORESETs.
4. The method of claim 1 , wherein the time offset between the DCI and the downlink signal being less than the threshold comprises a time offset between a last repetition of the DCI and the downlink signal being less than the threshold.
5. The method of claim 1 , further comprising receiving one or more configuration parameters indicating:
the first CORESET pool index for the first CORESET; and
the second CORESET pool index for the second CORESET, wherein the second CORESET is linked to the first CORESET for the repetitions of the DCI.
6. The method of claim 1 , wherein the downlink signal comprises at least one of:
a transport block;
a physical downlink shared channel (PDSCH) transmission; or
a channel state information (CSI) reference signal (RS).
7. A method comprising:
receiving, by a wireless device, one or more configuration parameters indicating:
a first control resource set (CORESET) pool index for a first CORESET; and
a second CORESET pool index for a second CORESET;
receiving, via at least one of the first CORESET or the second CORESET, repetitions of downlink control information (DCI) scheduling a downlink signal, wherein a time offset between the DCI and the downlink signal is less than a threshold; and
based on the first CORESET pool index and the second CORESET pool index being different, receiving the downlink signal using a CORESET associated with a lowest CORESET index among one or more CORESETs associated with a default CORESET pool index that is a lowest CORESET pool index or a highest CORESET pool index among the first CORESET pool index and the second CORESET pool index.
8. The method of claim 7 , wherein the receiving the downlink signal using the CORESET associated with the lowest CORESET index among the one or more CORESETs comprises receiving the downlink signal based on a transmission configuration indicator (TCI) state of the CORESET associated with the lowest CORESET index among the one or more CORESETs.
9. The method of claim 7 , wherein the receiving the downlink signal using the CORESET associated with the lowest CORESET index among the one or more CORESETs comprises receiving the downlink signal based on at least one demodulation reference signal (DMRS) port of the downlink signal being quasi co-located with a reference signal of the CORESET associated with the lowest CORESET index among the one or more CORESETs.
10. A method comprising:
sending, by a base station via a first control resource set (CORESET) and a second CORESET, repetitions of downlink control information (DCI) scheduling a downlink signal, wherein a time offset between the DCI and the downlink signal is less than a threshold;
based on a first CORESET pool index of the first CORESET and a second CORESET pool index of the second CORESET being different, determining a default CORESET pool index by determining, among the first CORESET pool index and the second CORESET pool index, a lowest CORESET pool index or a highest CORESET pool index; and
sending the downlink signal using a CORESET associated with a lowest CORESET index among one or more CORESETs associated with the default CORESET pool index.
11. The method of claim 10 , wherein the time offset between the DCI and the downlink signal being less than the threshold comprises a time offset between a last repetition of the DCI and the downlink signal being less than the threshold.
12. The method of claim 10 , wherein the sending the downlink signal using the CORESET associated with the lowest CORESET index among the one or more CORESETs comprises sending the downlink signal based on a transmission configuration indicator (TCI) state of the CORESET associated with the lowest CORESET index among the one or more CORESETs.
13. The method of claim 10 , further comprising sending one or more configuration parameters indicating:
the first CORESET pool index for the first CORESET; and
the second CORESET pool index for the second CORESET, wherein the second CORESET is linked to the first CORESET for the repetitions of the DCI.
14. The method of claim 10 , wherein the downlink signal comprises at least one of:
a transport block;
a physical downlink shared channel (PDSCH) transmission; or
a channel state information (CSI) reference signal (RS).