Sidelink resource allocation mode selection
A first wireless device does not monitor, during a cell discontinuous transmission (DTX) non-active period and based on a cell DTX being configured, a physical downlink control channel (PDCCH). The first wireless device triggers a scheduling request (SR) for requesting one or more sidelink (SL) resources. The first wireless device monitors, during the cell DTX non-active period, the PDCCH for downlink control information (DCI). A cyclic redundancy check of the DCI is scrambled based on at least one SL specific radio network temporary identifier (RNTI). The PDCCH is monitored based on: the cell DTX being configured; a discontinuous reception (DRX) being configured; and the SR being pending. The first wireless device receives, via the PDCCH, the DCI indicating a first SL resource. The first wireless device transmits, to a second wireless device and via the first SL resource, an SL communication.
1 . A first wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors cause the first wireless device to:
receive, from a base station, one or more messages comprising one or more parameters indicating:
a cell discontinuous transmission (DTX) non-active period of a cell DTX for reducing downlink transmission or uplink reception of the base station;
a discontinuous reception (DRX) of the first wireless device for power saving of the first wireless device;
a sidelink (SL) resource allocation mode 1 among the SL resource allocation mode 1 and an SL resource allocation mode 2; and
at least one SL specific radio network temporary identifier (RNTI) comprising at least one of an SL-RNTI or an SL configured scheduling-RNTI (CS-RNTI);
not monitor, during the cell DTX non-active period and based on the cell DTX being configured, a physical downlink control channel (PDCCH);
trigger a scheduling request (SR) for requesting one or more SL resources;
monitor, during the cell DTX non-active period, the PDCCH for downlink control information (DCI), wherein:
a cyclic redundancy check of the DCI is scrambled based on the at least one SL specific RNTI; and
monitoring the PDCCH is based on:
the cell DTX being configured;
the DRX being configured; and
the SR being pending;
receive, via the PDCCH, the DCI indicating a first SL resource; and
transmit, to a second wireless device and via the first SL resource, an SL communication.
2 . The first wireless device of claim 1 , wherein triggering the SR is based on at least one of:
SL buffer status reporting;
SL channel state information reporting; or
an SL DRX command indication.
3 . The first wireless device of claim 1 , wherein the DCI comprises the first SL resource.
4 . The first wireless device of claim 1 , wherein monitoring the PDCCH is further based on the first wireless device being in a wireless device DRX active time.
5 . The first wireless device of claim 4 , wherein the wireless device DRX active time, of the DRX, comprises a time while a second PDCCH, indicating a new transmission, has not been received after a successful reception of a random access response.
6 . The first wireless device of claim 1 , wherein a wireless device DRX active time, of the DRX, comprises a time while the SR is pending.
7 . The first wireless device of claim 1 , wherein the one or more messages further comprise a timer value of a second timer for determining a cell DTX active period.
8 . The first wireless device of claim 7 , wherein the instructions further cause the first wireless device to:
start the second timer; and
determine the cell DTX active period while the second timer is running.
9 . A method comprising:
receiving, by a first wireless device from a base station, one or more messages comprising one or more parameters indicating:
a cell discontinuous transmission (DTX) non-active period of a cell DTX for reducing downlink transmission or uplink reception of the base station;
a discontinuous reception (DRX) of the first wireless device for power saving of the first wireless device;
a sidelink (SL) resource allocation mode 1 among the SL resource allocation mode 1 and an SL resource allocation mode 2; and
at least one SL specific radio network temporary identifier (RNTI) comprising at least one of an SL-RNTI or an SL configured scheduling-RNTI (CS-RNTI);
not monitoring, during the cell DTX non-active period and based on the cell DTX being configured, a physical downlink control channel (PDCCH);
triggering a scheduling request (SR) for requesting one or more SL resources;
monitoring, during the cell DTX non-active period, the PDCCH for downlink control information (DCI), wherein:
a cyclic redundancy check of the DCI is scrambled based on the at least one SL specific RNTI; and
the monitoring is based on:
the cell DTX being configured;
the DRX being configured; and
the SR being pending;
receiving, via the PDCCH, the DCI indicating a first SL resource; and
transmitting, to a second wireless device and via the first SL resource, an SL communication.
10 . The method of claim 9 , wherein the triggering the SR is based on at least one of:
SL buffer status reporting;
SL channel state information reporting; or
an SL DRX command indication.
11 . The method of claim 9 , wherein the DCI comprises the first SL resource.
12 . The method of claim 9 , wherein the monitoring is further based on the first wireless device being in a wireless device DRX active time.
13 . The method of claim 12 , wherein the wireless device DRX active time, of the DRX, comprises a time while a second PDCCH, indicating a new transmission, has not been received after a successful reception of a random access response.
14 . The method of claim 9 , wherein a wireless device DRX active time, of the DRX, comprises a time while the SR is pending.
15 . The method of claim 9 , wherein the one or more messages further comprise a timer value of a second timer for determining a cell DTX active period.
16 . The method of claim 15 , further comprising:
starting the second timer; and
determining the cell DTX active period while the second timer is running.
17 . A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a first wireless device, cause the first wireless device to:
receive, from a base station, one or more messages comprising one or more parameters indicating:
a cell discontinuous transmission (DTX) non-active period of a cell DTX for reducing downlink transmission or uplink reception of the base station;
a discontinuous reception (DRX) of the first wireless device for power saving of the first wireless device;
a sidelink (SL) resource allocation mode 1 among the SL resource allocation mode 1 and an SL resource allocation mode 2; and
at least one SL specific radio network temporary identifier (RNTI) comprising at least one of an SL-RNTI or an SL configured scheduling-RNTI (CS-RNTI);
not monitor, during the cell DTX non-active period and based on the cell DTX being configured, a physical downlink control channel (PDCCH);
trigger a scheduling request (SR) for requesting one or more SL resources;
monitor, during the cell DTX non-active period, the PDCCH for downlink control information (DCI), wherein:
a cyclic redundancy check of the DCI is scrambled based on the at least one SL specific RNTI; and
monitoring the PDCCH is based on:
the cell DTX being configured;
the DRX being configured; and
the SR being pending;
receive, via the PDCCH, the DCI indicating a first SL resource; and
transmit, to a second wireless device and via the first SL resource, an SL communication.
18 . The non-transitory computer-readable medium of claim 17 , wherein triggering the SR is based on at least one of:
SL buffer status reporting;
SL channel state information reporting; or
an SL DRX command indication.
19 . The non-transitory computer-readable medium of claim 17 , wherein the DCI comprises the first SL resource.
20 . The non-transitory computer-readable medium of claim 17 , wherein monitoring the PDCCH is further based on the first wireless device being in a wireless device DRX active time.