Layer 1 reference signal received power reporting during a discontinuous reception operation
A wireless device receives 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. The L1-RSRP report is transmitted, at a first time, in response to the DRX timer running at a predefined time period before the first time. The L1-RSRP report may include, for example, an L1-RSRP value and a reference signal index associated with the L1-RSRP value. Ata second time, a configured L1-RSRP report transmission is skipped 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:
receiving, by a wireless device, 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;
transmitting 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 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.
2. The method of claim 1 , further comprising receiving 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 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.
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 , wherein the L1-RSRP report further comprises at least a second L1-RSRP value and at least a second reference signal resource index.
7. The method of claim 1 , wherein a medium access control entity of the wireless device is in active time at the predefined time period before the second time.
8. The method of claim 7 , wherein the active time comprises at least one of:
a time while one or more DRX timers are running;
a time while a scheduling request is sent on uplink control channel and is pending;
a time while an uplink grant for a pending hybrid automatic repeat request (HARQ) retransmission can occur and there is data in corresponding HARQ buffer; and
a time while a downlink control channel indicating a new transmission addressed to an identifier of the wireless device has not been received after successful reception of a random access response for a preamble not selected by the medium access control entity of the wireless device.
9. The method of claim 1 , further comprising receiving an indication of a short DRX cycle for a DRX operation.
10. The method of claim 9 , wherein the wireless device starts the DRX timer based on a received timer value in response to the short DRX cycle being used.
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 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 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.
12. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive an indication of first uplink control resources for the L1-RSRP report.
13. The wireless device of claim 11 , 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.
14. The wireless device of claim 11 , 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.
15. The wireless device of claim 11 , 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.
16. The wireless device of claim 11 , wherein the L1-RSRP report further comprises at least a second L1-RSRP value and at least a second reference signal resource index.
17. The wireless device of claim 11 , wherein a medium access control entity of the wireless device is in active time at the predefined time period before the second time.
18. The wireless device of claim 17 , wherein the active time comprises at least one of:
a time while one or more DRX timers are running;
a time while a scheduling request is sent on uplink control channel and is pending;
a time while an uplink grant for a pending hybrid automatic repeat request (HARQ) retransmission can occur and there is data in corresponding HARQ buffer; and
a time while a downlink control channel indicating a new transmission addressed to an identifier of the wireless device has not been received after successful reception of a random access response for a preamble not selected by the medium access control entity of the wireless device.
19. The wireless device of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to receive an indication of a short DRX cycle for a DRX operation.
20. A system comprising:
a base station comprising:
one or more first processors; and
first memory storing first instructions that, when executed by the one or more first 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; and
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 the report mask;
transmit 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.