Method and device in a node used for wireless communication

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

transmitting a first sequence and a first radio signal, the first sequence being associated with the first radio signal, the first sequence is used for determining a time-frequency resource unit occupied by the first radio signal, the first sequence is used for determining a scrambling sequence of the first radio signal; the first sequence being transmitted on a first random-access channel, and a first bit block being used for generating the first radio signal;

receiving a second radio signal, the second radio signal comprising a first information block; and

transmitting a second sequence and a third radio signal, the second sequence being associated with the third radio signal, the second sequence is used for determining a time-frequency resource unit occupied by the third radio signal, the second sequence is used for determining a scrambling sequence of the third radio signal; the second sequence being transmitted on a second random-access channel, and the first bit block being used for generating the third radio signal;

wherein the first radio signal is used for carrying a first identification, the first identification is used for determining the time-frequency resource unit occupied by the first radio signal; the first information block is used for triggering a transmission of the third radio signal; the first information block comprises a first sequence index, the first sequence index corresponds to the first sequence; the first information block is used for determining transmission parameters of the third radio signal.

2. The method according to claim 1 , wherein the first information block comprises Q first-type response signaling, a first response signaling is one of the Q first-type response signaling, the first response signaling corresponds to the first sequence, and the first response signaling is used for determining that the first bit block is not correctly decoded, Q is a positive integer.

3. The method according to claim 1 , wherein the first information block comprises a first target signaling, the first target signaling corresponds to the first sequence, the first target signaling is used for determining that the first bit block is not correctly decoded, a target receiver of the first information block is the first node.

4. The method according to claim 1 , comprising: performing a first blind detection and a second blind detection respectively on a first candidate channel and a second candidate channel; wherein the first radio signal is used for triggering the first blind detection and the second blind detection; the second radio signal is detected on the first candidate channel.

5. The method according to claim 4 , comprising: receiving a first signaling in a first time window; wherein a time domain resource unit occupied by the first candidate channel and a time domain resource unit occupied by the second candidate channel both belong to the first time window; at least one of a time-frequency resource unit occupied by the first sequence and a time-frequency resource unit occupied by the first radio signal is used for determining the first time window; the first signaling is used for determining scheduling information of the second radio signal.

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

receiving a first sequence and a first radio signal, the first sequence being associated with the first radio signal, the first sequence is used for determining a time-frequency resource unit occupied by the first radio signal, the first sequence is used for determining a scrambling sequence of the first radio signal; the first sequence being transmitted on a first random-access channel, and a first bit block being used for generating the first radio signal;

transmitting a second radio signal, the second radio signal comprising a first information block; and

receiving a second sequence and a third radio signal, the second sequence being associated with the third radio signal, the second sequence is used for determining a time-frequency resource unit occupied by the third radio signal, the second sequence is used for determining a scrambling sequence of the third radio signal; the second sequence being transmitted on a second random-access channel, and the first bit block being used for generating the third radio signal;

wherein the first radio signal is used for carrying a first identification, the first identification is used for determining the time-frequency resource unit occupied by the first radio signal; the first information block is used for triggering a transmission of the third radio signal; the first information block comprises a first sequence index, the first sequence index corresponds to the first sequence; the first information block is used for determining transmission parameters of the third radio signal.

7. The method according to claim 6 , wherein the first information block comprises Q first-type response signaling, a first response signaling is one of the Q first-type response signaling, the first response signaling corresponds to the first sequence, and the first response signaling is used for determining that the first bit block is not correctly decoded, Q is a positive integer.

8. The method according to claim 6 , wherein the first information block comprises a first target signaling, the first target signaling corresponds to the first sequence, the first target signaling is used for determining that the first bit block is not correctly decoded, a target receiver of the first information block is a first node.

9. The method according to claim 6 , comprising:

determining a first candidate channel out of the first candidate channel and a second candidate channel;

wherein a result of detection of the first radio signal is used for determining the first candidate channel; the second radio signal is transmitted on the first candidate channel.

10. The method according to claim 9 , comprising: transmitting a first signaling in first time window; wherein a time domain resource unit occupied by the first candidate channel and a time domain resource unit occupied by the second candidate channel both belong to the first time window; at least one of a time-frequency resource unit occupied by the first sequence and a time-frequency resource unit occupied by the first radio signal is used for determining the first time window; the first signaling is used for determining scheduling information of the second radio signal.

11. A first node for wireless communication, comprising:

a first transmitter, which transmits a first sequence and a first radio signal, the first sequence being associated with the first radio signal, the first sequence is used for determining a time-frequency resource unit occupied by the first radio signal, the first sequence is used for determining a scrambling sequence of the first radio signal; the first sequence being transmitted on a first random-access channel, and a first bit block being use for generating the first radio signal;

a first receiver, which receives a second radio signal, the second radio signal comprising a first information block; and

a second transmitter, which transmits a second sequence and a third radio signal, the second sequence being associated with the third radio signal, the second sequence is used for determining a time-frequency resource unit occupied by the third radio signal, the second sequence is used for determining a scrambling sequence of the third radio signal; the second sequence being transmitted on a second random-access channel, and the first bit block being used for generating the third radio signal;

wherein the first radio signal is used for carrying a first identification, the first identification is used for determining the time-frequency resource unit occupied by the first radio signal; the first information block is used for triggering a transmission of the third radio signal; the first information block comprises a first sequence index, the first sequence index corresponds to the first sequence; the first information block is used for determining transmission parameters of the third radio signal.

12. The first node according to claim 11 , wherein the first information block comprises Q first-type response signaling, a first response signaling is one of the Q first-type response signaling, the first response signaling corresponds to the first sequence, and the first response signaling is used for determining that the first bit block is not correctly decoded, Q is a positive integer.

13. The first node according to claim 11 , wherein the first information block comprises a first target signaling, the first target signaling corresponds to the first sequence, the first target signaling is used for determining that the first bit block is not correctly decoded, a target receiver of the first information block is the first node.

14. The first node according to claim 11 , comprising:

the first receiver performing a first blind detection and a second blind detection respectively on a first candidate channel and a second candidate channel;

wherein the first radio signal is used for triggering the first blind detection and the second blind detection; the second radio signal is detected on the first candidate channel.

15. The first node according to claim 14 , comprising: the first receiver receiving a first signaling in a first time window,

wherein a time domain resource unit occupied by the first candidate channel and a time domain resource unit occupied by the second candidate channel both belong to the first time window; at least one of a time-frequency resource unit occupied by the first sequence and a time-frequency resource unit occupied by the first radio signal is used for determining the first time window; the first signaling is used for determining scheduling information of the second radio signal.

16. A second node for wireless communication, comprising:

a second receiver, which receives a first sequence and a first radio signal, the first sequence being associated with the first radio signal, the first sequence is used for determining a time-frequency resource unit occupied by the first radio signal, the first sequence is used for determining a scrambling sequence of the first radio signal; the first sequence being transmitted on a first random-access channel, and a first bit block being used for generating the first radio signal;

a third transmitter, which transmits a second radio signal, the second radio signal comprising a first information block; and

a third receiver, which receives a second sequence and a third radio signal, the second sequence being associated with the third radio signal, the second sequence is used for determining a time-frequency resource unit occupied by the third radio signal, the second sequence is used for determining a scrambling sequence of the third radio signal; the second sequence being transmitted on a second random-access channel, and the first bit block being used for generating the third radio signal;

wherein the first radio signal is used for carrying a first identification, the first identification is used for determining the time-frequency resource unit occupied by the first radio signal; the first information block is used for triggering a transmission of the third radio signal; the first information block comprises a first sequence index, the first sequence index corresponds to the first sequence; the first information block is used for determining transmission parameters of the third radio signal.

17. The second node according to claim 16 , wherein the first information block comprises Q first-type response signaling, a first response signaling is one of the Q first-type response signaling, the first response signaling corresponds to the first sequence, and the first response signaling is used for determining that the first bit block is not correctly decoded, Q is a positive integer.

18. The second node according to claim 16 , wherein the first information block comprises a first target signaling, the first target signaling corresponds to the first sequence, the first target signaling is used for determining that the first bit block is not correctly decoded, a target receiver of the first information block is a first node.

19. The second node according to claim 16 , comprising:

the third transmitter determining a first candidate channel out of the first candidate channel and a second candidate channel; wherein a result of detection of the first radio signal is used for determining the first candidate channel; the second radio signal is transmitted on the first candidate channel.

20. The second node according to claim 19 , comprising:

the third transmitter transmitting a first signaling in a first time window;

wherein a time domain resource unit occupied by the first candidate channel and a time domain resource unit occupied by the second candidate channel both belong to the first time window; at least one of a time-frequency resource unit occupied by the first sequence and a time-frequency resource unit occupied by the first radio signal is used for determining the first time window; the first signaling is used for determining scheduling information of the second radio signal.