Spatial Relation in New Radio
A wireless device receives one or more radio resource control (RRC) messages indicating: two control resource set (coreset) group indexes; one or more sounding reference signal (SRS) resource sets; and a respective parameter, for each SRS resource set, for determining a transmission configuration indication (TCI) state among TCI states associated with the two coreset group indexes. The wireless device receives one or more control commands indicating: a first TCI state for a first coreset group index; and a second TCI state for a second coreset group index. The wireless device determines, based on a parameter associated with an SRS resource set, a TCI state among the first TCI state and the second TCI state. The wireless device transmits, via an SRS resource in the SRS resource set, an SRS using a spatial transmission filter determined based on a reference signal of the TCI state.
1 . A method comprising:
receiving, by a wireless device, one or more radio resource control (RRC) messages indicating:
two control resource set (coreset) group indexes;
one or more sounding reference signal (SRS) resource sets; and
a respective parameter, for each SRS resource set of the one or more SRS resource sets, for determining a transmission configuration indication (TCI) state among TCI states associated with the two coreset group indexes;
receiving one or more control commands indicating:
a first TCI state for a first coreset group index of the two coreset group indexes; and
a second TCI state for a second coreset group index of the two coreset group indexes;
determining, based on a parameter associated with an SRS resource set of the one or more SRS resource sets, a TCI state among the first TCI state and the second TCI state; and
transmitting, via an SRS resource in the SRS resource set, an SRS using a spatial transmission filter determined based on a reference signal of the TCI state.
2 . The method of claim 1 , wherein the spatial transmission filter is used for a reception of the reference signal; and
wherein the TCI state indicates a quasi co-location (QCL) type for the reference signal.
3 . The method of claim 1 , wherein the one or more RRC messages indicate:
the first coreset group index for one or more first coresets in an active downlink bandwidth part (BWP) of a cell; and
the second coreset group index for one or more second coresets in the active downlink BWP of the cell.
4 . The method of claim 3 , further comprising:
monitoring, via the one or more first coresets with the first coreset group index, downlink control channels using the first TCI state; and
monitoring, via the one or more second coresets with the second coreset group index, the downlink control channels using the second TCI state.
5 . The method of claim 4 , wherein:
the one or more RRC messages indicate a plurality of TCI states for the active downlink BWP of the cell; and
the plurality of TCI states comprise the first TCI state and the second TCI state.
6 . The method of claim 5 , wherein an active uplink BWP of the cell comprises:
the one or more SRS resource sets; and
the cell operates in a frequency range 2.
7 . The method of claim 1 , wherein the one or more control commands comprise one or more medium access control control elements (MAC CEs).
8 . The method of claim 1 , wherein the one or more RRC messages indicate, for a usage of the SRS resource, at least one of:
codebook;
non-codebook; and
antenna switching.
9 . The method of claim 1 , wherein the parameter associated with the SRS resource set is an SRS resource set index.
10 . The method of claim 9 , wherein the TCI state is:
the first TCI state based on the SRS resource set index being equal to the first coreset group index; and
the second TCI state based on the SRS resource set index being equal to the second coreset group index.
11 . A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to: receive one or more radio resource control (RRC) messages indicating:
two control resource set (coreset) group indexes;
one or more sounding reference signal (SRS) resource sets; and
a respective parameter, for each SRS resource set of the one or more SRS resource sets, for determining a transmission configuration indication (TCI) state among TCI states associated with the two coreset group indexes;
receive one or more control commands indicating:
a first TCI state for a first coreset group index of the two coreset group indexes; and
a second TCI state for a second coreset group index of the two coreset group indexes;
determine, based on a parameter associated with an SRS resource set of the one or more SRS resource sets, a TCI state among the first TCI state and the second TCI state; and
transmit, via an SRS resource in the SRS resource set, an SRS using a spatial transmission filter determined based on a reference signal of the TCI state.
12 . The wireless device of claim 11 , wherein the spatial transmission filter is used for a reception of the reference signal; and wherein the TCI state indicates a quasi co-location (QCL) type for the reference signal.
13 . The wireless device of claim 11 , wherein the one or more RRC messages indicate:
the first coreset group index for one or more first coresets in an active downlink bandwidth part (BWP) of a cell; and
the second coreset group index for one or more second coresets in the active downlink BWP of the cell.
14 . The wireless device of claim 13 , wherein the instructions further cause the wireless device to:
monitor, via the one or more first coresets with the first coreset group index, downlink control channels using the first TCI state; and
monitor, via the one or more second coresets with the second coreset group index, the downlink control channels using the second TCI state.
15 . The wireless device of claim 14 , wherein:
the one or more RRC messages indicate a plurality of TCI states for the active downlink BWP of the cell; and
the plurality of TCI states comprise the first TCI state and the second TCI state.
16 . The wireless device of claim 15 , wherein an active uplink BWP of the cell comprises:
the one or more SRS resource sets; and
the cell operates in a frequency range 2.
17 . The wireless device of claim 11 , wherein the one or more control commands comprise one or more medium access control control elements (MAC CEs).
18 . The wireless device of claim 11 , wherein the one or more RRC messages indicate, for a usage of the SRS resource, at least one of:
codebook;
non-codebook; and
antenna switching.
19 . The wireless device of claim 11 , wherein the parameter associated with the SRS resource set is an SRS resource set index; and wherein the TCI state is:
the first TCI state based on the SRS resource set index being equal to the first coreset group index; and
the second TCI state based on the SRS resource set index being equal to the second coreset group index.
20 . A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:
receive one or more radio resource control (RRC) messages indicating:
two control resource set (coreset) group indexes;
one or more sounding reference signal (SRS) resource sets; and
a respective parameter, for each SRS resource set of the one or more SRS resource sets, for determining a transmission configuration indication (TCI) state among TCI states associated with the two coreset group indexes;
receive one or more control commands indicating:
a first TCI state for a first coreset group index of the two coreset group indexes; and
a second TCI state for a second coreset group index of the two coreset group indexes;
determine, based on a parameter associated with an SRS resource set of the one or more SRS resource sets, a TCI state among the first TCI state and the second TCI state; and
transmit, via an SRS resource in the SRS resource set, an SRS using a spatial transmission filter determined based on a reference signal of the TCI state.