Method and device for channel-measurement-triggered uplink signaling and downlink control monitoring
A method and a device in a User Equipment (UE) and a base station are provided for wireless communication. The UE receives a target radio signal in a first frequency-domain resource, transmits a first radio signal, monitors a second radio signal in a first time window, and monitors a third radio signal in a first time-domain resource in the first frequency-domain resource. A channel measurement for the target radio signal is used for triggering a transmission of the first radio signal; the first radio signal is used for determining a multiantenna related transmission of the third radio signal; the first radio signal is related to a multiantenna related reception of the third radio signal; the second radio signal is used for determining the first time-domain resource, or, the second radio signal is used for determining that the first radio signal is correctly received.
1 . A method performed by a User Equipment (UE), the method comprising:
receiving a channel state information reference signal (CSI-RS) in a first frequency-domain resource;
transmitting an uplink transmission including a beam recovery request based on a channel measurement of the CSI-RS;
monitoring for a first physical downlink control channel (PDCCH) within a first time window, wherein the first PDCCH includes Downlink Control Information (DCI); and
monitoring for a second PDCCH within a first time-domain resource that is in the frequency-domain resource.
2 . The method of claim 1 , wherein a start of the first time window is a time-domain resource where the uplink transmission is located plus a first offset; or, if the first PDCCH is correctly received, an offset between a start of the first time-domain resource and a time-domain resource occupied by the first PDCCH is configured by default.
3 . The method of claim 1 , further comprising:
receiving a first signaling; wherein the first signaling is a higher-layer signaling and the first signaling is used for determining a length of the first time window.
4 . The method of claim 1 , further comprising:
on a condition that the first PDCCH is not received, retransmitting the uplink transmission including the beam recovery request; and
monitoring for the first PDCCH in a second time window.
5 . A method performed by a base station (BS), the method comprising:
transmitting a channel state information reference signal (CSI-RS) in a frequency-domain resource;
receiving an uplink transmission including a beam recovery request;
transmitting a first physical downlink control channel (PDCCH) within a first time window, wherein the first PDCCH includes Downlink Control Information (DCI); and
transmitting a second PDCCH in a first time-domain resource in the frequency-domain resource.
6 . The method of claim 5 , wherein a start of the first time window is a time-domain resource where the uplink transmission is located plus a first offset; or, if the first PDCCH is correctly received, an offset between a start of the first time-domain resource and a time-domain resource occupied by the first PDCCH is configured by default.
7 . The method of claim 5 , further comprising:
transmitting a first signaling; wherein the first signaling is a higher-layer signaling, and the first signaling is used for determining a length of the first time window.
8 . The method of claim 5 , further comprising:
receiving a retransmission of the uplink transmission including the beam recovery request; and
transmitting the first PDCCH in a second time window.
9 . A user equipment (UE), comprising:
a transceiver; and
a processor;
wherein the transceiver and processor are configured to:
receive a channel state information reference signal (CSI-RS) in a frequency-domain resource;
transmit an uplink transmission including a beam recovery request based on a channel measurement of the CSI-RS;
monitor for a first physical downlink control channel (PDCCH) in a first time window, wherein the first PDCCH includes Downlink Control Information (DCI); and
monitor for a second PDCCH within a first time-domain resource that is in the frequency-domain resource.
10 . The UE of claim 9 , wherein a start of the first time window is a time-domain resource where the uplink transmission is located plus a first offset; or, if the first PDCCH is correctly received, an offset between a start of the first time-domain resource and a time-domain resource occupied by the first PDCCH is configured by default.
11 . The UE of claim 9 , wherein the transceiver and the processor are further configured to:
receive a first signaling; wherein the first signaling is a higher-layer signaling, and the first signaling is used for determining a length of a first time window.
12 . The UE of claim 9 , wherein the transceiver and processor are further configured to:
on a condition that the first PDCCH is not received, retransmitting uplink transmission including the beam recovery request; and
monitoring for the first PDCCH in a second time window.
13 . The method of claim 1 , wherein the uplink transmission includes a physical uplink control channel (PUCCH).
14 . The method of claim 1 , wherein the frequency-domain resource is deployed on unlicensed spectrum, and the uplink transmission is transmitted on licensed spectrum.
15 . The method of claim 1 , wherein the monitoring for the first PDCCH comprises blind decoding.
16 . The method of claim 1 , wherein the first PDCCH includes a first physical layer signaling marked by a Common Control Radio Network Temporary Identity (CC-RNTI).
17 . The UE of claim 9 , wherein the uplink transmission includes a physical uplink control channel (PUCCH).
18 . The UE of claim 9 , wherein the frequency-domain resource is deployed on unlicensed spectrum, and the uplink transmission is transmitted on licensed spectrum.
19 . The UE of claim 9 , wherein the monitoring for the first PDCCH comprises blind decoding.
20 . The UE of claim 9 , wherein the first PDCCH includes a first physical layer signaling marked by a Common Control Radio Network Temporary Identity (CC-RNTI).