Method and device for dual discontinuous reception timer operation in wireless communications
Provided are techniques for dual discontinuous reception timer operation. A user equipment receives first downlink control information (DCI) having a scrambling code that is generated based on a second Radio Network Temporary Identifier (RNTI). The first DCI indicates a new transmission, a first HARQ process number of a first signal and a first time-frequency resource. The UE receives the first signal on the first time-frequency resource, where the first signal is generated based on a first bit block and the second RNTI is used to generate a scrambling code of the first signal.
1 . A user equipment (UE), comprising:
a receiver configured to:
receive first downlink control information (DCI) having a scrambling code that is generated based on a second Radio Network Temporary Identifier (RNTI), wherein the first DCI indicates a first time-frequency resource, a new transmission and a first hybrid automatic repeat request (HARQ) process number of a first signal,
receive the first signal in the first time-frequency resource, wherein the first signal is based on a first bit block and a scrambling code of the first signal is based on the second RNTI,
receive a second DCI having a scrambling code that is generated based on a first RNTI, wherein the second DCI indicates a second time-frequency resource, a retransmission and a second HARQ process number of a second signal, and
receive the second signal in the second time-frequency resource, wherein the second signal is based on the first bit block and a scrambling code of the second signal is based on the first RNTI; and
a transmitter configured to transmit a second feedback signal,
wherein the UE is configured to:
on a condition that the second feedback signal is transmitted and the first and second RNTIs are both first-type RNTIs, start a first timer for a Discontinuous Reception (DRX) in a serving cell of the UE, and
on a condition that the second feedback signal is transmitted and the first RNTI is a first-type RNTI and the second RNTI is a second-type RNTI, start a second timer for the DRX and non-unicast transmission.
2 . The UE according to claim 1 , wherein:
the receiver is configured to:
receive a third signaling, the second RNTI being used to generate a scrambling code of the third signaling, the third signaling being used to indicate a third time-frequency resource; and
receive a third signal on the third time-frequency resource; the first bit block being used to generate the third signal; the third signaling being used to indicate a retransmission; the third signaling indicating that a HARQ process number of the third signal is the first HARQ process number; the third signaling is received after the first DCI,
the UE is configured to start a third timer, at least one of time-frequency resources occupied by the first DCI or time-frequency resources occupied by the first signal being used to determine a start of the third timer, and
during a running period of the third timer and on a condition that the third signal is not correctly decoded, the UE is configured to monitor a PDCCH (Physical Downlink Control Channel); wherein the third timer is used for a DRX; the second RNTI is the second-type RNTI.
3 . The UE according to claim 1 , wherein:
the UE is configured to, on a condition that the first timer or the second timer expires, restart, maintain, or modify an expiration value of a third timer is used for the DRX, and
the receiver is configured to monitor a PDCCH when the third timer is running.
4 . The UE according to claim 1 , wherein:
the UE is configured to, on a condition that the second feedback signal is transmitted, start a sixth timer for a HARQ process identified by the first HARQ process number, wherein the sixth timer is different from the first and second timers.
5 . The UE according to claim 4 , wherein the second RNTI is the second-type RNTI.
6 . The UE according to claim 5 , wherein the UE is configured to:
in response to an expiration of the first timer or the second timer, start a third timer for the DRX,
in response to an expiration of the sixth timer, start a seventh timer for the DRX,
during a running period of the third timer, monitor a PDCCH based on the second RNTI, and
during a running period of the seventh timer, monitor the PDCCH based on the first RNTI.
7 . The UE according to claim 5 , wherein the sixth timer is a drx-HARQ-RTT-TimerDL.
8 . The UE according to claim 6 , wherein the sixth timer is a drx-HARQ-RTT-TimerDL; the third timer is related to receiving a retransmission, and a name of the third timer comprises PTM (Point to Multipoint) and retransmission; the seventh timer is a drx-RetransmissionTimerDL.
9 . The UE according to claim 7 , wherein:
the receiver is configured to receive a first MAC CE (Medium Access Control Control Element) for the second RNTI of the second-type RNTI,
the UE is configured to, in a response to receiving the first MAC CE, stop a fifth timer for the second RNTI,
the receiver is configured to, in a running period of the fifth timer, monitor a PDCCH, and
a system frame number and a first time length are used together to determine a start of the fifth timer; the fifth timer is used for a DRX.
10 . The UE according to claim 8 , wherein:
the receiver is configured to receive a first MAC CE for the second RNTI of the second-type RNTI,
the UE is configured to, in response to receiving the first MAC CE, stop a fifth timer for the second RNTI,
the receiver is configured to, in a running period of the fifth timer, monitor a PDCCH, and
a system frame number and a first time length are used together to determine a start of the fifth timer; the fifth timer is used for a DRX.
11 . The UE according to claim 1 , wherein the first timer is triggered to run once after each time a HARQ feedback is transmitted, the first timer is a drx-HARQ-RTT-TimerDL, the second timer is configured by DRX-ConfigPTM, and names of the second timer comprise drx and PTM; each HARQ process scheduled by each G-RNTI scrambled PDCCH is respectively associated with an instance of the second timer.
12 . The UE according to claim 9 , wherein the first timer is triggered to run once after each time a HARQ feedback is transmitted, the first timer is a drx-HARQ-RTT-TimerDL, the second timer is a drx-HARQ-RTT-TimerDL-PTM.
13 . The UE according to claim 10 , wherein the first timer is triggered to run once after each time a HARQ feedback is transmitted, the first timer is a drx-HARQ-RTT-TimerDL, the second timer is a drx-HARQ-RTT-TimerDL-PTM.
14 . The UE according to claim 10 , wherein in a running period of the third timer, a PDCCH is monitored; the PDCCH is used to transmit the second DCI.
15 . The UE according to claim 12 , wherein in a running period of the third timer, a PDCCH is monitored; the PDCCH is used to transmit the second DCI.
16 . The UE according to claim 4 , wherein the first timer is triggered to run once after each time a HARQ feedback is transmitted, the first timer is a drx-HARQ-RTT-TimerDL, the second timer is a drx-HARQ-RTT-TimerDL-PTM.
17 . The UE according to claim 7 , wherein the first timer is triggered to run once after each time a HARQ feedback is transmitted, the first timer is a drx-HARQ-RTT-TimerDL, the second timer is a drx-HARQ-RTT-TimerDL-PTM.
18 . The UE according to claim 7 , wherein the first timer is triggered to run once after each time that a HARQ feedback is transmitted, the first timer is a drx-HARQ-RTT-TimerDL, the second timer is configured by DRX-ConfigPTM, and names of the second timer comprise drx and PTM; each HARQ process scheduled by each G-RNTI scrambled PDCCH is respectively associated with an instance of the second timer.
19 . A base station, comprising:
a transmitter configured to:
transmit first downlink control information (DCI) having a scrambling code that is generated based on a second Radio Network Temporary Identifier (RNTI), wherein the first DCI indicates a first time-frequency resource, a new transmission and a first hybrid automatic repeat request (HARQ) process number of a first signal,
transmit the first signal in the first time-frequency resource, wherein the first signal is based on a first bit block and a scrambling code of the first signal is based on the second RNTI,
transmit a second DCI having a scrambling code that is generated based on a first RNTI, wherein the second DCI indicates a second time-frequency resource, a retransmission and a second HARQ process number of a second signal, and
transmit the second signal in the second time-frequency resource, wherein the second signal is based on the first bit block and a scrambling code of the second signal is based on the first RNTI; and
a receiver configured to receive a second feedback signal,
wherein:
on a condition that the second feedback signal is transmitted and the first and second RNTIs are both first-type RNTIs, a first timer for a Discontinuous Reception (DRX) in a serving cell is started, and
on a condition that the second feedback signal is transmitted and the first RNTI is a first-type RNTI and the second RNTI is a second-type RNTI, a second timer for the DRX and non-unicast transmission is started.
20 . A method, comprising:
receiving first downlink control information (DCI) having a scrambling code that is generated based on a second Radio Network Temporary Identifier (RNTI), wherein the first DCI indicates a first time-frequency resource, a new transmission and a first hybrid automatic repeat request (HARQ) process number of a first signal;
receiving the first signal in the first time-frequency resource, wherein the first signal is based on a first bit block and a scrambling code of the first signal is based on the second RNTI;
receiving a second DCI having a scrambling code that is generated based on a first RNTI, wherein the second DCI indicates a second time-frequency resource, a retransmission and a second HARQ process number of a second signal;
receiving the second signal in the second time-frequency resource, wherein the second signal is based on the first bit block and a scrambling code of the second signal is based on the first RNTI;
transmitting a second feedback signal;
in response to transmitting the second feedback signal and the first and second RNTIs being both first-type RNTIs, starting a first timer for a Discontinuous Reception (DRX) in a serving cell of the UE; and
in response to transmitting the second feedback signal and the first RNTI being a first-type RNTI and the second RNTI being a second-type RNTI, starting a second timer for the DRX and non-unicast transmission.