Wake-up signal (WUS) controlled actions
Embodiments include methods for a user equipment (UE) to perform different operations based on detection of wake-up signal (WUS) transmissions from a network node in a radio access network (RAN). Such methods include determining whether a WUS transmission, from the network node, is detected during a particular WUS monitoring occasion (WMO). Such methods also include, based on determining that the WUS is detected during the particular WMO, performing one or more first operations during a first time period associated with the particular WMO; and based on determining that the WUS is not detected during the particular WMO, performing one or more second operations during a second time period. Various first and second operations can be performed, with the first and second operations differing in some manner. The first and second time periods can be the same or different. Embodiments also include complementary methods performed by a network node.
1. A method for a user equipment (UE) to perform different operations based on detection of wake-up signal (WUS) transmissions from a network node in a radio access network (RAN), the method comprising:
determining whether a WUS transmission, from the network node, is detected during a particular WUS monitoring occasion (WMO);
based on determining that the WUS is detected during the particular WMO, performing one or more first operations during a first time period associated with the particular WMO, wherein performing the one or more first operations comprises monitoring a first physical downlink control channel (PDCCH) search space for PDCCH candidates whose downlink control information (DCI) cyclic redundancy check (CRC) is scrambled by any of a first set of identifiers; and
based on determining that the WUS is not detected during the particular WMO, performing one or more second operations during a second time period, wherein performing the one or more second operations comprises monitoring a second PDCCH search space for the PDCCH candidates whose DCI CRC is scrambled by any of a second set of identifiers, wherein the second PDCCH search space is a subset of the first PDCCH search space,
wherein the first time period is the same as the second time period, and
wherein the first set of identifiers includes a cell radio network temporary identifier (C-RNTI) associated with the UE, and the second set of identifiers excludes the C-RNTI.
2. The method of claim 1 , wherein the first time period comprises one of the following:
one or more discontinuous reception (DRX) On durations;
a first number of timeslots beginning at a second number of timeslots after a timeslot including the particular WMO; or
M timeslots of every N consecutive timeslots after the timeslot including the particular WMO, where M<N.
3. The method of claim 1 , wherein:
the first time period comprises one or more timeslots, each timeslot associated with a respective first operation; and
performing the one or more first operations, during the one or more timeslots, is further based on whether the one or more first operations are permitted during their respective associated timeslots.
4. The method of claim 1 , wherein:
the one or more first and the one or more second operations further comprise performing at least one of the following:
channel state information (CSI) measurements;
radio resource management (RRM) measurements;
radio link management (RLM) measurements;
the one or more first operations are performed based on a first configuration for the measurements; and
the one or more second operations are performed based on a second configuration for the measurements.
5. The method of claim 1 , wherein:
performing the one or more first operations comprises transmitting, to the network node during the first time period, one or more of the following group:
sounding reference signals (SRS); and
channel state information (CSI);
performing the one or more second operations comprises refraining from transmitting any of said group during the second time period.
6. The method of claim 1 , further comprising receiving, from the network node, a WUS configuration including information identifying one or more WMOs, including the particular WMO, wherein the WUS configuration further includes one or more of the following associated with the WUS transmission including the scheduling information:
a CORESET;
a search space type or identifier;
an aggregation level; and
one or more radio network temporary identifiers (RNTI).
7. The method of claim 1 , wherein:
performing the one or more first operations comprises transmitting an acknowledgement (WUS-ACK);
the first time period is prior to monitoring for a subsequent physical downlink control channel (PDCCH) transmission;
performing the one or more second operations comprises monitoring a second PDCCH search space for PDCCH candidates associated with any of one or more identifiers; and
the second time period is different than the first time period.
8. The method of claim 1 , wherein the method further comprises, based on determining that the WUS is detected during the particular WMO, receiving, with the WUS, configuration information related to at least one of the following: the one or more first operations, the one or more second operations, the first time period, and the second time period.
9. A method, performed by a network node in a radio access network (RAN) for performing different operations based on user equipment (UE) detection of wake-up signal (WUS) transmissions by the network node, the method comprising:
transmitting a WUS to the UE during a particular WUS monitoring occasion (WMO) for the UE;
determining whether the UE detected the transmitted WUS;
based on determining that the UE detected the WUS, performing one or more first operations during a first time period associated with the WMO, wherein performing the one or more first operations comprises transmitting, to the UE, a first physical downlink control channel (PDCCH) search space for PDCCH candidates whose downlink control information (DCI) cyclic redundancy check (CRC) is scrambled by any of a first set of identifiers; and
based on determining that the UE did not detect the WUS, performing one or more second operations during a second time period, wherein performing the one or more second operations comprises transmitting, to the UE, a second PDCCH search space for the PDCCH candidates whose DCI CRC is scrambled by any of a second set of identifiers, wherein the second PDCCH search space is a subset of the first PDCCH search space,
wherein the first time period is the same as the second time period, and
wherein the first set of identifiers includes a cell radio network temporary identifier (C-RNTI) associated with the UE, and the second set of identifiers excludes the C-RNTI.
10. The method of claim 9 , wherein the first time period comprises one of the following:
one or more discontinuous reception (DRX) On durations;
a first number of timeslots beginning at a second number of timeslots after a timeslot including the particular WMO; or
M timeslots of every N consecutive timeslots after the timeslot including the particular WMO, where M<N.
11. The method of claim 9 , wherein determining whether the UE detected the WUS comprises receiving a WUS acknowledgement (WUS-ACK) from the UE.
12. The method of claim 9 , wherein:
performing the one or more first operations includes receiving, from the UE during the first time period, one or more of the following group:
sounding reference signals (SRS), and
channel state information (CSI); and
performing the one or more second operations comprises refraining from monitoring, during the second time period, for transmission by the UE of any of said group.
13. The method of claim 9 , further comprising transmitting, to the UE, a WUS configuration including information identifying one or more WMOs, including the particular WUS MO, wherein the WUS configuration also includes one or more of the following associated with the WUS transmission:
a CORESET;
a search space type or identifier;
an aggregation level; and
one or more radio network temporary identifiers (RNTI).
14. The method of claim 9 , wherein:
performing the one or more first operations includes receiving an acknowledgement (WUS-ACK) from the UE;
the first time period is before transmitting a physical downlink control channel (PDCCH) to the UE;
performing the one or more second operations includes transmitting, to the UE, a PDCCH in a second PDCCH search space; and
the second time period is different than the first time period.
15. A user equipment (UE) configured to perform different operations based on detection of wake-up signal (WUS) transmissions from a network node in a radio access network RAN, the UE comprising:
transceiver circuitry configured to communicate with the network node; and
processing circuitry operatively coupled to the transceiver circuitry, the processing circuitry and the transceiver circuitry configured to perform operations corresponding to the method of claim 1 .
16. A network node, in a radio access network (RAN), configured to perform different operations based on user equipment (UE) detection of wake-up signal (WUS) transmissions by the network node, the network node comprising:
radio network interface circuitry configured to communicate with one or more UEs; and
processing circuitry operatively coupled with the radio network interface circuitry, the processing circuitry and the radio network interface circuitry configured to perform operations corresponding to the method of claim 9 .