Pathloss reference signal update
A wireless device receives configuration parameters associated with a cell. The wireless device receives an activation command indicating activation of a transmission configuration indicator (TCI) state having a downlink reference signal, the command indicating activation of the TCI state for a control resource set (coreset). The wireless device receives downlink control information (DCI) indicating uplink resources of a time slot of an active uplink bandwidth part of the cell, where a sounding reference signal resource indicator field is absent in the DCI. The wireless device transmits, via the uplink resources, an uplink signal with a transmission power determined based on the reference signal, the transmitting being in response to a parameter enabling a default pathloss reference signal determination and the uplink resources occurring after a predetermined number of measurement samples of the downlink reference signal is obtained.
1 . A method comprising:
receiving, by a wireless device, configuration parameters associated with a cell;
receiving an activation command indicating activation of a transmission configuration indicator (TCI) state having a downlink reference signal, the activation command indicating activation of the TCI state for a control resource set (coreset), wherein the activation command updates a first TCI state of the coreset to the TCI state;
receiving downlink control information (DCI) indicating uplink resources of a time slot of an active uplink bandwidth part of the cell, wherein a sounding reference signal resource indicator field is absent in the DCI; and
transmitting, via the uplink resources indicated by the DCI, an uplink signal with a transmission power determined based on the downlink reference signal of the TCI state, the transmitting being in response to:
a parameter enabling a default pathloss reference signal determination; and
the uplink resources occurring after a predetermined number of measurement samples of the downlink reference signal is obtained.
2 . The method of claim 1 , wherein the configuration parameters comprise the parameter enabling the default pathloss reference signal determination for the cell.
3 . The method of claim 1 , wherein the active uplink bandwidth part of the cell comprises the uplink resources.
4 . The method of claim 1 , wherein the transmitting is further in response to at least one of:
the downlink reference signal being untracked before the receiving the activation command;
the configuration parameters lacking indication of uplink resources for the active uplink bandwidth part; or
the configuration parameters lacking indication of an uplink control channel resource for the active uplink bandwidth part.
5 . The method of claim 1 , wherein:
the configuration parameters indicate one or more uplink control channel resources for the active uplink bandwidth part of the cell; and
the transmitting is further in response to each uplink control channel resource of the one or more uplink control channel resources not being associated with a respective spatial relation.
6 . The method of claim 1 , further comprising monitoring, before the receiving the activation command, downlink control channels via the coreset based on a first reference signal indicated by the first TCI state.
7 . The method of claim 1 , further comprising:
receiving second DCI scheduling transmission of a second signal via a second uplink resource; and
transmitting, with a transmission power determined based on a prior reference signal, the uplink signal in response to:
the configuration parameters comprising the parameter; and
the second uplink resource occurring before the predetermined number of measurement samples of the downlink reference signal is obtained.
8 . The method of claim 1 , wherein:
for an active downlink bandwidth part of the cell, the configuration parameters indicate one or more coresets comprising the coreset; and
for the coreset, the configuration parameters indicate a coreset index that is lowest among one or more coreset indexes of the one or more coresets.
9 . The method of claim 1 , further comprising transmitting, at a time, an acknowledgement of the activation command, wherein the predetermined number of measurement samples of the downlink reference signal occurs after the time of the acknowledgement.
10 . The method of claim 1 , further comprising determining the transmission power based on a layer-3 filtered reference signal received power (L3-RSRP) of the downlink reference signal.
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 configuration parameters associated with a cell;
receive an activation command indicating activation of a transmission configuration indicator (TCI) state having a downlink reference signal, the activation command indicating activation of the TCI state for a control resource set (coreset), wherein the activation command updates a first TCI state of the coreset to the TCI state;
receive downlink control information (DCI) indicating uplink resources of a time slot of an active uplink bandwidth part of the cell, wherein a sounding reference signal resource indicator field is absent in the DCI; and
transmit, via the uplink resources indicated by the DCI, an uplink signal with a transmission power determined based on the downlink reference signal of the TCI state, the transmitting being in response to:
a parameter enabling a default pathloss reference signal determination; and
the uplink resources occurring after a predetermined number of measurement samples of the downlink reference signal is obtained.
12 . The wireless device of claim 11 , wherein the configuration parameters comprise the parameter enabling the default pathloss reference signal determination for the cell.
13 . The wireless device of claim 11 , wherein the active uplink bandwidth part of the cell comprises the uplink resources.
14 . The wireless device of claim 11 , wherein the transmitting is further in response to at least one of:
the downlink reference signal being untracked before the receiving the activation command;
the configuration parameters lacking indication of uplink resources for the active uplink bandwidth part; or
the configuration parameters lacking indication of an uplink control channel resource for the active uplink bandwidth part.
15 . The wireless device of claim 11 , wherein:
the configuration parameters indicate one or more uplink control channel resources for the active uplink bandwidth part of the cell; and
the transmitting is further in response to each uplink control channel resource of the one or more uplink control channel resources not being associated with a respective spatial relation.
16 . The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to monitor, before the receiving the activation command, downlink control channels via the coreset based on a first reference signal indicated by the first TCI state.
17 . The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to:
receive second DCI scheduling transmission of a second signal via a second uplink resource; and
transmit, with a transmission power determined based on a prior reference signal, the uplink signal in response to:
the configuration parameters comprising the parameter; and
the second uplink resource occurring before the predetermined number of measurement samples of the downlink reference signal is obtained.
18 . The wireless device of claim 11 , wherein:
for an active downlink bandwidth part of the cell, the configuration parameters indicate one or more coresets comprising the coreset; and
for the coreset, the configuration parameters indicate a coreset index that is lowest among one or more coreset indexes of the one or more coresets.
19 . The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit, at a time, an acknowledgement of the activation command, wherein the predetermined number of measurement samples of the downlink reference signal occurs after the time of the acknowledgement.
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 configuration parameters associated with a cell;
receive an activation command indicating activation of a transmission configuration indicator (TCI) state having a downlink reference signal, the activation command indicating activation of the TCI state for a control resource set (coreset), wherein the activation command updates a first TCI state of the coreset to the TCI state;
receive downlink control information (DCI) indicating uplink resources of a time slot of an active uplink bandwidth part of the cell, wherein a sounding reference signal resource indicator field is absent in the DCI; and
transmit, via the uplink resources indicated by the DCI, an uplink signal with a transmission power determined based on the downlink reference signal of the TCI state, the transmitting being in response to:
a parameter enabling a default pathloss reference signal determination; and
the uplink resources occurring after a predetermined number of measurement samples of the downlink reference signal is obtained.