Method and device in communication node for wireless communication

1. A method in a first-type communication node for wireless communication, comprising:

receiving first information;

performing Q energy detections respectively in Q time sub-pools within a first sub-band, wherein the Q is a positive integer greater than 1; and

if energy detected by each energy detection of the Q energy detections is lower than a first threshold, starting to transmit a first radio signal at a first time-instant;

wherein the first information is used to determine K candidate time-instant subsets, each candidate time-instant subset of the K candidate time-instant subsets comprises a positive integer number of candidate time-instant(s), the K is a positive integer greater than 1; a target time-instant subset is one of the K candidate time-instant subsets, the first time-instant belongs to the target time-instant subset; a frequency-domain bandwidth of the first sub-band is used to determine the target time-instant subset out of the K candidate time-instant subsets, the frequency-domain resources occupied by the first radio signal belong to the first sub-band; the first information is transmitted through an air interface; and the first radio signal successively occupies a part of a multi-carrier symbol and a positive integer number of complete multi-carrier symbol(s) in the time domain, and a signal transmitted in the part of the multi-carrier symbol occupied by the first radio signal is a cyclic extension of a signal transmitted in an earliest complete multi-carrier symbol occupied by the first radio signal; the first threshold is in a unit of dBm, the first threshold is related to the bandwidth of the first sub-band.

2. The method according to claim 1 , further comprising:

receiving second information;

wherein the second information is used to determine a frequency-domain bandwidth of the first sub-band, and the second information is transmitted through the air interface.

3. The method according to claim 1 , wherein a length of a time interval between one candidate time-instant within the K candidate time-instant subsets and a first reference time-instant belongs to a first candidate time-length set, the K candidate time-instant subsets respectively correspond to K candidate time-length subsets, lengths of time intervals between candidate time-instants in any one of the K candidate time-instant subsets and the first reference time-instant constitute a candidate time-length subset of the K candidate time-length subsets corresponding to the any one of the K candidate time-instant subsets; and the first information is used to indicate the K candidate time-length subsets in the first candidate time-length set.

4. The method according to claim 3 , wherein at least one of an amount of candidate time lengths in the first candidate time-length set or a distribution of candidate time lengths in the first candidate time-length set is related to a subcarrier spacing of a subcarrier included in frequency-domain resources occupied by the first radio signal.

5. The method according to claim 1 , further comprising:

receiving a first signaling;

wherein the first signaling is used to determine at least one of frequency-domain resources occupied by the first radio signal or time-domain resources occupied by the first radio signal, and the first signaling is transmitted through the air interface.

6. A method in a second-type communication node for wireless communication, comprising:

transmitting first information; and

receiving a first radio signal;

wherein the first information is used to determine K candidate time-instant subsets, each candidate time-instant subset of the K candidate time-instant subsets comprises a positive integer number of candidate time-instant(s), the K is a positive integer greater than 1; a target time-instant subset is one of the K candidate time-instant subsets, a starting time-instant of transmitting the first radio signal is a first time-instant, the first time-instant belongs to the target time-instant subset; a frequency-domain bandwidth of a first sub-band is used to determine the target time-instant subset out of the K candidate time-instant subsets, frequency-domain resources occupied by the first radio signal belong to the first sub-band; the first information is transmitted through an air interface; and the first radio signal successively occupies a part of a multi-carrier symbol and a positive integer number of complete multi-carrier symbol(s) in the time domain, and a signal transmitted in the part of the multi-carrier symbol occupied by the first radio signal is a cyclic extension of a signal transmitted in an earliest complete multi-carrier symbol occupied by the first radio signal; the first threshold is in a unit of dBm, the first threshold is related to the bandwidth of the first sub-band.

7. The method according to claim 6 , further comprising:

transmitting second information;

wherein the second information is used to determine a frequency-domain bandwidth of the first sub-band, and the second information is transmitted through the air interface.

8. The method according to claim 6 , wherein a length of a time interval between one candidate time-instant within the K candidate time-instant subsets and a first reference time-instant belongs to a first candidate time-length set, the K candidate time-instant subsets respectively correspond to K candidate time-length subsets, lengths of time intervals respectively between candidate time-instants in any one of the K candidate time-instant subsets and the first reference time-instant constitute a candidate time-length subset of the K candidate time-length subsets corresponding to the any one of the K candidate time-instant subsets; and the first information is used to indicate the K candidate time-length subsets in the first candidate time-length set.

9. The method according to claim 8 , wherein at least one of an amount of candidate time lengths in the first candidate time-length set or a distribution of candidate time lengths in the first candidate time-length set is related to a subcarrier spacing of a subcarrier included in frequency-domain resources occupied by the first radio signal.

10. The method according to claim 6 , further comprising:

transmitting a first signaling;

wherein the first signaling is used to determine at least one of frequency-domain resources occupied by the first radio signal or time-domain resources occupied by the first radio signal, and the first signaling is transmitted through the air interface.

11. A first-type communication node device for wireless communication, comprising:

a first receiver, to receive first information;

a second receiver, to perform Q energy detections respectively in Q time sub-pools within a first sub-band, wherein the Q is a positive integer greater than 1; and

a first transmitter, if energy detected by each energy detection of the Q energy detections is lower than a first threshold, to start to transmit a first radio signal at a first time-instant;

wherein the first information is used to determine K candidate time-instant subsets, each candidate time-instant subset of the K candidate time-instant subsets comprises a positive integer number of candidate time-instant(s), the K is a positive integer greater than 1; a target time-instant subset is one of the K candidate time-instant subsets, the first time-instant belongs to the target time-instant subset; a frequency-domain bandwidth of the first sub-band is used to determine the target time-instant subset out of the K candidate time-instant subsets, the frequency-domain resources occupied by the first radio signal belong to the first sub-band; the first information is transmitted through an air interface; and the first radio signal successively occupies a part of a multi-carrier symbol and a positive integer number of complete multi-carrier symbol(s) in the time domain, and a signal transmitted in the part of the multi-carrier symbol occupied by the first radio signal is a cyclic extension of a signal transmitted in an earliest complete multi-carrier symbol occupied by the first radio signal; the first threshold is in a unit of dBm, the first threshold is related to the bandwidth of the first sub-band.

12. The first-type communication node device according to claim 11 , wherein the first receiver receives second information; wherein the second information is used to determine a frequency-domain bandwidth of the first sub-band, and the second information is transmitted through the air interface.

13. The first-type communication node device according to claim 11 , wherein a length of a time interval between one candidate time-instant within the K candidate time-instant subsets and a first reference time-instant belongs to a first candidate time-length set, the K candidate time-instant subsets respectively correspond to K candidate time-length subsets, lengths of time intervals respectively between candidate time-instants in any one of the K candidate time-instant subsets and the first reference time-instant constitute a candidate time-length subset of the K candidate time-length subsets corresponding to the any one of the K candidate time-instant subsets;

and the first information is used to indicate the K candidate time-length subsets in the first candidate time-length set.

14. The first-type communication node device according to claim 13 , wherein at least one of an amount of candidate time lengths in the first candidate time-length set or a distribution of candidate time lengths in the first candidate time-length set is related to a subcarrier spacing of a subcarrier included in frequency-domain resources occupied by the first radio signal.

15. The first-type communication node device according to claim 11 , wherein the first receiver receives a first signaling; wherein the first signaling is used to determine at least one of frequency-domain resources occupied by the first radio signal or time-domain resources occupied by the first radio signal, and the first signaling is transmitted through the air interface.

16. A second-type communication node device for wireless communication, comprising:

a second transmitter, to transmit first information; and

a third receiver, to receive a first radio signal;

wherein the first information is used to determine K candidate time-instant subsets, each candidate time-instant subset of the K candidate time-instant subsets comprises a positive integer number of candidate time-instant(s), the K is a positive integer greater than 1; a target time-instant subset is one of the K candidate time-instant subsets, a starting time-instant of transmitting the first radio signal is a first time-instant, the first time-instant belongs to the target time-instant subset; a frequency-domain bandwidth of a first sub-band is used to determine the target time-instant subset out of the K candidate time-instant subsets, frequency-domain resources occupied by the first radio signal belong to the first sub-band; the first information is transmitted through an air interface; and the first radio signal successively occupies a part of a multi-carrier symbol and a positive integer number of complete multi-carrier symbol(s) in the time domain, and a signal transmitted in the part of the multi-carrier symbol occupied by the first radio signal is a cyclic extension of a signal transmitted in an earliest complete multi-carrier symbol occupied by the first radio signal; the first threshold is in a unit of dBm, the first threshold is related to the bandwidth of the first sub-band.

17. The second-type communication node device according to claim 16 , wherein the second transmitter transmits second information; wherein the second information is used to determine a frequency-domain bandwidth of the first sub-band, and the second information is transmitted through the air interface.

18. The second-type communication node device according to claim 16 , wherein a length of a time interval between one candidate time-instant within the K candidate time-instant subsets and a first reference time-instant belongs to a first candidate time-length set, the K candidate time-instant subsets respectively correspond to K candidate time-length subsets, lengths of time intervals respectively between candidate time-instants in any one of the K candidate time-instant subsets and the first reference time-instant constitute a candidate time-length subset of the K candidate time-length subsets corresponding to the any one of the K candidate time-instant subsets; and the first information is used to indicate the K candidate time-length subsets in the first candidate time-length set.

19. The second-type communication node device according to claim 18 , wherein at least one of an amount of candidate time lengths in the first candidate time-length set or a distribution of candidate time lengths in the first candidate time-length set is related to a subcarrier spacing of a subcarrier included in frequency-domain resources occupied by the first radio signal.

20. The second-type communication node device according to claim 16 , wherein the second transmitter transmits a first signaling; wherein the first signaling is used to determine at least one of frequency-domain resources occupied by the first radio signal or time-domain resources occupied by the first radio signal, and the first signaling is transmitted through the air interface.