Method and device in UE and base station for beam recovery in wireless communication

1. A method in a User Equipment (UE) for wireless communication, comprising:

receiving a target radio signal in a first frequency-domain resource;

transmitting a first radio signal;

monitoring a second radio signal in a first time window; and

monitoring a third radio signal in a first time-domain resource in the first frequency-domain resource;

wherein a channel measurement for the target radio signal is used for triggering a transmission of the first radio signal; the target radio signal is a CSI-RS in the first frequency-domain resource, or an antenna port used for transmitting a PDCCH in the first frequency-domain resource is spatially Quasi Co-Located with an antenna port used for transmitting the target radio signal; the second radio signal includes one DCI; the third radio signal is one PDCCH; the first radio signal is used by a target receiver that received the first radio signal 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 first radio signal is used for determining a first antenna port group; an antenna port group used for transmitting the third radio signal is Quasi Co-Located with the first antenna port group; when the second radio signal is correctly received, 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.

2. The method according to claim 1 , wherein a time-domain resource occupied by the first radio signal is used for determining at least one of a start of the first time window or an end of the first time window.

3. The method according to claim 1 , wherein when the second radio signal is correctly received, a time-domain resource occupied by the second radio signal is used for determining the first time-domain resource.

4. The method according to claim 1 , 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.

5. The method according to claim 1 ,

wherein the first radio signal is used for determining a beam recovery request for the first frequency-domain resource;

or, comprising: transmitting the first radio signal again; and monitoring the second radio signal in a second time window; wherein the second radio signal is not correctly received in the first time window.

6. A method in a base station for wireless communication, comprising:

transmitting a target radio signal in a first frequency-domain resource;

receiving a first radio signal;

transmitting a second radio signal in a first time window; and

transmitting a third radio signal in a first time-domain resource in the first frequency-domain resource;

wherein a channel measurement for the target radio signal is used by a target receiver that received the target radio signal for triggering a transmission of the first radio signal; the target radio signal is a CSI-RS in the first frequency-domain resource, or an antenna port used for transmitting a PDCCH in the first frequency-domain resource is spatially Quasi Co-Located with an antenna port used for transmitting the target radio signal; the second radio signal includes one DCI; the third radio signal is one PDCCH; 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 first radio signal is used for determining a first antenna port group; an antenna port group used for transmitting the third radio signal is Quasi Co-Located with the first antenna port group; 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.

7. The method according to claim 6 , wherein a time-domain resource occupied by the first radio signal is used for determining at least one of a start of the first time window or an end of the first time window.

8. The method according to claim 6 , wherein a time-domain resource occupied by the second radio signal is used for determining the first time-domain resource.

9. The method according to claim 6 , 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.

10. The method according to claim 6 , wherein the first radio signal is used for determining a beam recovery request for the first frequency-domain resource;

or, comprising: receiving the first radio signal again; and transmitting the second radio signal in a second time window; wherein the second radio signal is not correctly received in the first time window.

11. A UE for wireless communication, comprising:

a UE processing device, to receive a target radio signal in a first frequency-domain resource; to transmit a first radio signal; to monitor a second radio signal in a first time window; and to monitor a third radio signal in a first time-domain resource in the first frequency-domain resource;

wherein a channel measurement for the target radio signal is used for triggering a transmission of the first radio signal; the target radio signal is a CSI-RS in the first frequency-domain resource, or an antenna port used for transmitting a PDCCH in the first frequency-domain resource is spatially Quasi Co-Located with an antenna port used for transmitting the target radio signal; the second radio signal includes one DCI; the third radio signal is one PDCCH; the first radio signal is used by a target receiver that received the first radio signal 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 first radio signal is used for determining a first antenna port group; an antenna port group used for transmitting the third radio signal is Quasi Co-Located with the first antenna port group; when the second radio signal is correctly received, 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.

12. The UE according to claim 11 , wherein a time-domain resource occupied by the first radio signal is used for determining at least one of a start of the first time window or an end of the first time window.

13. The UE according to claim 11 , wherein when the second radio signal is correctly received, a time-domain resource occupied by the second radio signal is used for determining the first time-domain resource.

14. The UE according to claim 11 , wherein the UE processing device receives 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.

15. The UE according to claim 11 , wherein the first radio signal is used for determining a beam recovery request for the first frequency-domain resource;

or, the UE processing device transmits the first radio signal again; and the UE processing device monitors the second radio signal in a second time window; wherein the second radio signal is not correctly received in the first time window.

16. A base station for wireless communication, comprising:

a BS processing device, to transmit a target radio signal in a first frequency-domain resource; to receive a first radio signal; to transmit a second radio signal in a first time window; and to transmit a third radio signal in a first time-domain resource in the first frequency-domain resource;

wherein a channel measurement for the target radio signal is used by a target receiver that received the target radio signal for triggering a transmission of the first radio signal; the target radio signal is a CSI-RS in the first frequency-domain resource, or an antenna port used for transmitting a PDCCH in the first frequency-domain resource is spatially Quasi Co-Located with an antenna port used for transmitting the target radio signal; the second radio signal includes one DCI; the third radio signal is one PDCCH; 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 first radio signal is used for determining a first antenna port group; an antenna port group used for transmitting the third radio signal is Quasi Co-Located with the first antenna port group; 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.

17. The base station according to claim 16 , wherein a time-domain resource occupied by the first radio signal is used for determining at least one of a start of the first time window or an end of the first time window.

18. The base station according to claim 16 , wherein a time-domain resource occupied by the second radio signal is used for determining the first time-domain resource.

19. The base station according to claim 16 , wherein the BS processing device transmits 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.

20. The base station according to claim 16 , wherein the first radio signal is used for determining a beam recovery request for the first frequency-domain resource;

or, the BS processing device receives the first radio signal again; and the BS processing device transmits the second radio signal in a second time window; wherein the second radio signal is not correctly received in the first time window.