Method and device for physical downlink control channel (PDCCH) monitoring in wireless communication
The present application discloses a method and a device for wireless communications, including: receiving a first message; the first message indicating whether an Active Time comprises a period of time during which a first scheduling request is in a pending state after being transmitted on a PUCCH or a period of time deferred by a first time length after the first scheduling request's being transmitted and during which the first scheduling request is in a pending state; and transmitting the first scheduling request on a first PUCCH resource; and monitoring a PDCCH in the Active Time. The present application can conserve power by receiving the first message and determining the Active Time.
1 . A user equipment (UE) for wireless communications, the UE comprising:
a transceiver; and
a processor, wherein the transceiver and the processor are configured to:
receive, from a base station, a system information block (SIB),
determine an active time based on the SIB, such that:
on a condition that the SIB does not indicate non-terrestrial network (NTN) communication, the Active Time comprises a first period of time after transmission of a scheduling request, during which the scheduling request is pending, and
on a condition that the SIB indicates NTN communication, the Active Time comprises a second period of time deferred by a time length after the transmission of the scheduling request during which the scheduling request is pending,
transmit the scheduling request on a physical uplink control channel (PUCCH) resource, and
monitor a physical downlink control channel (PDCCH) in the Active Time, wherein the UE supports the NTN communication.
2 . The UE according to claim 1 , wherein the transceiver and the processor are further configured to:
increment a counter by 1 along with a transmission of the scheduling request,
wherein only when the first counter is equal to 1 does the SIB indicate whether the Active Time comprises the first period or the second period of time.
3 . The UE according to claim 1 , wherein the transceiver and the processor are further configured to:
increment a counter by 1 along with a transmission of the scheduling request,
wherein the is unrelated to the counter.
4 . The UE according to claim 1 , wherein the SIB is indicative of a first parameter, and
wherein the first parameter is measured in one or more slot, and
wherein a sum of a Timing Advance (TA) maintained by the UE and the first parameter is used for determining the time length, and
wherein the SIB indicates that the Active Time comprises the second period of time.
5 . The UE according to claim 4 ,
wherein the first parameter is k mac .
6 . The UE according to claim 4 , wherein the transceiver and the processor are further configured to:
receive a Media Access Control Control Element (MAC CE), wherein the MAC CE is indicative of a second parameter measured in one or more slot, and wherein the SIB indicates a third parameter measured in one or more slot,
increment a counter by 1 along with a transmission of the scheduling request,
as a response to that the counter is equal to a threshold, initiating a random access procedure,
wherein initiating the random access procedure comprises transmitting a message on one or more time-frequency resources indicated by a random access response (RAR) for the random access procedure,
wherein the message occupies a physical uplink shared channel (PUSCH),
wherein the second parameter and the third parameter are used together for determining an uplink transmission time of the UE, and
wherein at least one of the second parameter or the third parameter is used for determining a transmission timing of the first PUSCH.
7 . The UE according to claim 1 , the transceiver and the processor are further configured to:
start a timer along with a transmission of the scheduling request,
wherein the scheduling request is transmitted only when the timer is not running, and an expiration value of the timer is equal to the time length, and
wherein the SIB indicates that the Active Time comprises the second period of time.
8 . A method in a user equipment (UE) for wireless communications, the method comprising:
receiving, from a base station, a system information block (SIB);
determine an active time based on the SIB, such that:
on a condition that the SIB does not indicate non-terrestrial network (NTN) communication, the Active Time comprises a first period of time after transmission of a scheduling request, during which the scheduling request is pending, and
on a condition that the SIB indicates NTN communication, the Active Time comprises a second period of time deferred by a time length after the transmission of the scheduling request, during which the scheduling request is pending;
transmitting the scheduling request on a physical uplink control channel (PUCCH) resource; and
monitoring a physical downlink control channel (PDCCH) in the Active Time, wherein the UE supports the NTN communication.