METHOD AND DEVICE IN NODE FOR WIRELESS COMMUNICATION

1 . A first node for wireless communication, comprising:

a first receiver, to perform a first sensing in a first subband, and when the first sensing indicates that a channel is busy, to determine to give up a radio transmission on a first channel, to start a first timer and to update a first counter by 1; and

a first transmitter, when any one of Q timers expires, to reset the first counter to an initial value, and when the first counter reaches or exceeds a target threshold, to transmit a first signal;

wherein the first channel belongs to the first subband in frequency domain, the first sensing is correlated to a first index, and the first index is any one of Q indexes; the Q indexes are one-to-one corresponding to the Q timers respectively, and the first timer is one of the Q timers that is corresponding to the first index; and Q is a positive integer greater than 1.

2 . The first node according to claim 1 , wherein the first receiver monitors a first type of signaling in the first subband, wherein the first type of signaling is used for determining the first index; and the first sensing is performed each time the first type of signaling is detected;

or, the first receiver receives a first signaling, wherein the first signaling indicates at least one of expiration values of the Q timers or a target threshold of the first counter;

or, the first transmitter transmits a second signal, wherein the second signal indicates a second index, and the second index is one of the Q indexes.

3 . The first node according to claim 1 , wherein when the first counter reaches or exceeds a target threshold, the first transmitter triggers a sensing failure indication of the first subband, wherein as a response to the action that the sensing failure indication of the first subband is triggered, the first signal is generated.

4 . The first node according to claim 3 , wherein when the sensing failure indication has been triggered for each subband configured with a PRACH in a first serving cell, the first transmitter transmits the sensing failure indication to an upper layer; when the sensing failure indication has not been triggered for at least one subband configured with a PRACH in a first serving cell, the first transmitter switches from the first subband to a second subband; wherein the second subband is one subband in the first serving cell that is configured with a PRACH and has not been triggered the sensing failure indication.

5 . The first node according to claim 4 , wherein as a response to the action of transmitting the sensing failure indication to an upper layer, the first transmitter transmits a radio link failure message.

6 . The first node according to any one of claim 1 , wherein the Q timers are all corresponding to the first counter.

7 . A second node for wireless communication, comprising:

a second receiver, to receive a first signal;

wherein a transmitter of the first signal maintains a first counter, and the first counter reaches or exceeds a target threshold; the transmitter of the first signal performs a first sensing in a first subband; when the first sensing indicates that a channel is busy, the transmitter of the first signal determines to give up a radio transmission on a first channel, starts a first timer and updates the first counter by 1; the first channel belongs to the first subband in frequency domain, the first sensing is correlated to a first index, and the first index is any one of Q indexes; the Q indexes are one-to-one corresponding to Q timers respectively, and the first timer is one of the Q timers that is corresponding to the first index; and Q is a positive integer greater than 1.

8 . The second node according to claim 7 , comprising:

a second transmitter, to transmit a first type of signaling in the first subband; wherein the first type of signaling is used for determining the first index; and the first sensing is performed each time the first type of signaling is detected by the transmitter of the first signal;

or, a second transmitter, to transmit a first signaling; wherein the first signaling indicates at least one of expiration values of the Q timers or a target threshold of the first counter;

or, the second receiver receives a second signal, wherein the second signal indicates a second index, and the second index is one of the Q indexes.

9 . The second node according to claim 7 , wherein the second receiver receives a radio link failure message, wherein the transmitter of the first signal transmits a sensing failure indication to an upper layer.

10 . The second node according to claim 7 , wherein the Q timers are all corresponding to the first counter.

11 . A method in a first node for wireless communication, comprising:

performing a first sensing in a first subband; when the first sensing indicates that a channel is busy, determining to give up a radio transmission on a first channel, starting a first timer and updating a first counter by 1; and

when any one of Q timers expires, resetting the first counter to an initial value; and when the first counter reaches or exceeds a target threshold, transmitting a first signal;

wherein the first channel belongs to the first subband in frequency domain, the first sensing is correlated to a first index, and the first index is any one of Q indexes; the Q indexes are one-to-one corresponding to the Q timers respectively, and the first timer is one of the Q timers that is corresponding to the first index; and Q is a positive integer greater than 1.

12 . The method according to claim 11 , comprising:

monitoring a first type of signaling in the first subband; wherein the first type of signaling is used for determining the first index; and the first sensing is performed each time the first type of signaling is detected;

or, receiving a first signaling; wherein the first signaling indicates at least one of expiration values of the Q timers or a target threshold of the first counter;

or, transmitting a second signal; wherein the second signal indicates a second index, and the second index is one of the Q indexes.

13 . The method according to claim 11 , comprising:

when the first counter reaches or exceeds a target threshold, triggering a sensing failure indication of the first subband;

wherein as a response to the action that the sensing failure indication of the first subband is triggered, the first signal is generated.

14 . The method according to claim 13 , comprising:

when the sensing failure indication has been triggered for each subband configured with a PRACH in a first serving cell, transmitting the sensing failure indication to an upper layer; when the sensing failure indication has not been triggered for at least one subband configured with a PRACH in a first serving cell, switching from the first subband to a second subband;

wherein the second subband is one subband in the first serving cell that is configured with a PRACH and has not been triggered the sensing failure indication.

15 . The method according to claim 14 , comprising:

as a response to the action of transmitting the sensing failure indication to an upper layer, transmitting a radio link failure message.

16 . The method according to claim 11 , wherein the Q timers are all corresponding to the first counter.

17 . A method in a second node for wireless communication, comprising:

receiving a first signal;

wherein a transmitter of the first signal maintains a first counter, and the first counter reaches or exceeds a target threshold; the transmitter of the first signal performs a first sensing in a first subband; when the first sensing indicates that a channel is busy, the transmitter of the first signal determines to give up a radio transmission on a first channel, starts a first timer and updates the first counter by 1; the first channel belongs to the first subband in frequency domain, the first sensing is correlated to a first index, and the first index is any one of Q indexes; the Q indexes are one-to-one corresponding to Q timers respectively, and the first timer is one of the Q timers that is corresponding to the first index; and Q is a positive integer greater than 1.

18 . The method according to claim 17 , comprising:

transmitting a first type of signaling in the first subband; wherein the first type of signaling is used for determining the first index; and the first sensing is performed each time the first type of signaling is detected by the transmitter of the first signal;

or, transmitting a first signaling; wherein the first signaling indicates at least one of expiration values of the Q timers or a target threshold of the first counter;

or, receiving a second signal; wherein the second signal indicates a second index, and the second index is one of the Q indexes.

19 . The method according to claim 17 , comprising:

receiving a radio link failure message;

wherein the transmitter of the first signal transmits a sensing failure indication to an upper layer.

20 . The method according to claim 17 , wherein the Q timers are all corresponding to the first counter.