Layer 1 reference signal received power reporting during a discontinuous reception operation
A base station may transmit a report mask indicating a transmission of a layer 1 reference signal received power (L1-RSRP) report limited to a time period when a discontinuous reception (DRX) timer is running for a wireless device. The base station may receive the L1-RSRP from the wireless device at a first time, in response to the DRX timer running at a predefined time period before the first time. The received L1-RSRP report may include an L1-RSRP value and a reference signal index associated with the L1-RSRP value. At second time, the base station may skip a reception of a configured L1-RSRP report transmission from the wireless device in response to the DRX timer not running at the predefined time period before the second time and the report mask.
1. A method comprising:
transmitting, by a base station, a report mask indicating a transmission of a layer 1 reference signal received power (L1-RSRP) report limited to a time period when a discontinuous reception (DRX) timer is running for a wireless device;
receiving, from the wireless device at a first time, the L1-RSRP report, in response to the DRX timer running at a predefined time period before the first time, wherein the L1-RSRP report comprises:
an L1-RSRP value; and
a reference signal index associated with the L1-RSRP value; and
skipping at a second time, a reception of a configured L1-RSRP report transmission from the wireless device, in response to:
the DRX timer not running at the predefined time period before the second time; and
the report mask.
2. The method of claim 1 , further comprising transmitting an indication of first uplink control resources for the L1-RSRP report.
3. The method of claim 1 , wherein the reference signal index indicates at least one of:
a first plurality of channel state information reference signals; and
a second plurality of synchronization signal blocks.
4. The method of claim 1 , wherein the report mask further indicates the L1-RSRP report transmission is limited to the time period when the DRX timer is running, wherein the transmission comprises at least one of:
a channel quality indicator (CQI);
a precoding matrix indicator (PMI);
a channel state information reference signal resource indicator (CRI); and
a rank indicator (RI) report.
5. The method of claim 1 , wherein the reference signal index is selected with a largest L1-RSRP value of a reference signal among L1-RSRP values of a plurality of reference signals.
6. The method of claim 1 , further comprising transmitting an indication of a short DRX cycle for a DRX operation.
7. The method of claim 6 , wherein the base station starts the DRX timer, for the wireless device, based on a transmitted timer value in response to the short DRX cycle being used.
8. A base station comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the base station to:
transmit a report mask indicating a transmission of a layer 1 reference signal received power (L1-RSRP) report limited to a time period when a discontinuous reception (DRX) timer is running for a wireless device;
receive from the wireless device at a first time, the L1-RSRP report, in response to the DRX timer running at a predefined time period before the first time, wherein the L1-RSRP report comprises:
an L1-RSRP value; and
a reference signal index associated with the L1-RSRP value; and
skip at a second time, a reception of a configured L1-RSRP report transmission from the wireless device, in response to:
the DRX timer not running at the predefined time period before the second time; and
the report mask.
9. The base station of claim 8 , wherein the instructions, when executed by the one or more processors, further cause the base station to transmit an indication of first uplink control resources for the L1-RSRP report.
10. The base station of claim 8 , wherein the reference signal index indicates at least one of:
a first plurality of channel state information reference signals; and
a second plurality of synchronization signal blocks.
11. The base station of claim 8 , wherein the report mask further indicates the L1-RSRP report transmission is limited to the time period when the DRX timer is running, wherein the transmission comprises at least one of:
a channel quality indicator (CQI);
a precoding matrix indicator (PMI);
a channel state information reference signal resource indicator (CRI); and
a rank indicator (RI) report.
12. The base station of claim 8 , wherein the reference signal index is selected with a largest L1-RSRP value of a reference signal among L1-RSRP values of a plurality of reference signals.
13. The base station of claim 8 , wherein the L1-RSRP report further comprises at least a second L1-RSRP value and at least a second reference signal resource index.
14. The base station of claim 8 , wherein the instructions, when executed by the one or more processors, further cause the base station to transmit an indication of a short DRX cycle for a DRX operation.
15. A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors, cause the one or more processors to:
receive, from a base station, a report mask indicating a transmission of a layer 1 reference signal received power (L1-RSRP) report limited to a time period when a discontinuous reception (DRX) timer is running;
transmit, to the base station at a first time, the L1-RSRP report, in response to the DRX timer running at a predefined time period before the first time, wherein the L1-RSRP report comprises:
an L1-RSRP value; and
a reference signal index associated with the L1-RSRP value; and
skip at a second time, a configured L1-RSRP report transmission, in response to:
the DRX timer not running at the predefined time period before the second time; and
the report mask.
16. The non-transitory computer-readable medium of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the one or more processors to receive an indication of first uplink control resources for the L1-RSRP report.
17. The non-transitory computer-readable medium of claim 15 , wherein the reference signal index indicates at least one of:
a first plurality of channel state information reference signals; and
a second plurality of synchronization signal blocks.
18. The non-transitory computer-readable medium of claim 15 , wherein the report mask further indicates a transmission is limited to the time period when the DRX timer is running, wherein the transmission comprises at least one of:
a channel quality indicator (CQI);
a precoding matrix indicator (PMI);
a channel state information reference signal resource indicator (CRI); and
a rank indicator (RI) report.
19. The non-transitory computer-readable medium of claim 15 , wherein the reference signal index is selected with a largest L1-RSRP value of a reference signal among L1-RSRP values of a plurality of reference signals.
20. The non-transitory computer-readable medium of claim 15 , wherein the L1-RSRP report further comprises at least a second L1-RSRP value and at least a second reference signal resource index.