Channel quality related format determination for wireless communication

1. A first node for wireless communications, comprising:

a first receiver, receiving a first signal and a second signal; and

a first transmitter, transmitting a third signal in a first radio resource pool;

wherein the first signal is used for determining first information, the first information being related to channel quality between the first node and a transmitter of the first signal; the second signal is used for determining second information, the second information being related to channel quality between a transmitter of the second signal and the first node; the transmitter of the first signal is different from the transmitter of the second signal; the first information and the second information are used together for determining a magnitude of time-domain resources occupied by the third signal; the first information is used for calculating a first value, and the second information is used for calculating a second value; when a difference value between the first value and the second value is less than a first threshold, a transmission format of the third signal is a first format; otherwise, the transmission format of the third signal is a second format; a number of time-domain resources occupied by the first format is less than a number of the time-domain resources occupied by the second format, and the first threshold is a non-negative number.

2. The first node according to claim 1 , wherein the transmission format of the third signal is one format in a first format set, and the first information and the second information are used together for determining the transmission format of the third signal out of the first format set.

3. The first node according to claim 1 , comprising:

the first receiver, receiving a fourth signal in a second radio resource pool; wherein the fourth signal carries a first bit block, and the third signal comprises indication information on whether the first bit block is correctly received;

or, comprising:

the first transmitter, transmitting a fifth signal; wherein the fifth signal is used for determining the second information;

or, comprising:

the first transmitter, transmitting a sixth signal; wherein the sixth signal is used for determining the first information.

4. The first node according to claim 1 , wherein the second information is used for determining transmission power of the third signal.

5. The first node according to claim 1 , wherein the first value is equal to a minimum value between a first upper limit and a first calculation value, and the first calculation value is equal to a value of a first parameter multiplied by the first information plus the first threshold plus a first adjustment; the first upper limit is configured maximum transmission power, the first threshold is target reception power, and the first parameter is a weight for weighing a pathloss; the first threshold is a value of p0-DL-PSFCH or alpha-DL-PSFCH, the first adjustment is equal to 10 log 10 (2 μ ), and the μ is equal to one of 0, 1, 2, 3 or 4; and the second value is equal to transmission power of the third signal.

6. A second node for wireless communications, comprising:

a second transmitter, transmitting a first signal; and

a second receiver, receiving a third signal in a first radio resource pool;

wherein the first signal is used for determining first information, the first information being related to channel quality between the second node and a receiver of the first signal; a second signal is used for determining second information, the second information being related to channel quality between a transmitter of the second signal and a receiver of the second signal; the second node is different from the transmitter of the second signal; the first information and the second information are used together for determining a magnitude of time-domain resources occupied by the third signal; the first information is used for calculating a first value, and the second information is used for calculating a second value; when a difference value between the first value and the second value is less than a first threshold, a transmission format of the third signal is a first format; otherwise, the transmission format of the third signal is a second format; a number of time-domain resources occupied by the first format is less than a number of the time-domain resources occupied by the second format, and the first threshold is a non-negative number.

7. The second node according to claim 6 , wherein the transmission format of the third signal is one format in a first format set, and the first information and the second information are used together for determining the transmission format of the third signal out of the first format set.

8. The second node according to claim 6 , comprising:

the second transmitter, transmitting a fourth signal in a second radio resource pool; wherein the fourth signal carries a first bit block, and the third signal comprises indication information on whether the first bit block is correctly received;

or, comprising:

the second receiver, receiving a fifth signal; wherein the fifth signal is used for determining the second information;

or, comprising:

the second receiver, receiving a sixth signal; wherein the sixth signal is used for determining the first information.

9. A method in a first node for wireless communications, comprising:

receiving a first signal and a second signal; and

transmitting a third signal in a first radio resource pool;

wherein the first signal is used for determining first information, the first information being related to channel quality between the first node and a transmitter of the first signal; the second signal is used for determining second information, the second information being related to channel quality between a transmitter of the second signal and the first node; the transmitter of the first signal is different from the transmitter of the second signal; the first information and the second information are used together for determining a magnitude of time-domain resources occupied by the third signal; the first information is used for calculating a first value, and the second information is used for calculating a second value; when a difference value between the first value and the second value is less than a first threshold, a transmission format of the third signal is a first format; otherwise, the transmission format of the third signal is a second format; a number of time-domain resources occupied by the first format is less than a number of the time-domain resources occupied by the second format, and the first threshold is a non-negative number.

10. The method in the first node according to claim 9 , wherein the transmission format of the third signal is one format in a first format set, and the first information and the second information are used together for determining the transmission format of the third signal out of the first format set.

11. The method in the first node according to claim 9 , comprising:

receiving a fourth signal in a second radio resource pool; wherein the fourth signal carries a first bit block, and the third signal comprises indication information on whether the first bit block is correctly received;

or, comprising:

transmitting a fifth signal; wherein the fifth signal is used for determining the second information;

or, comprising:

transmitting a sixth signal; wherein the sixth signal is used for determining the first information.

12. The method in the first node according to claim 9 , wherein the second information is used for determining transmission power of the third signal.

13. The method in the first node according to claim 9 , wherein the first value is equal to a minimum value between a first upper limit and a first calculation value, and the first calculation value is equal to a value of a first parameter multiplied by the first information plus the first threshold plus a first adjustment; the first upper limit is configured maximum transmission power, the first threshold is target reception power, and the first parameter is a weight for weighing a pathloss; the first threshold is a value of p0-DL-PSFCH or alpha-DL-PSFCH, the first adjustment is equal to 10 log 10 (2 μ ), and the μ is equal to one of 0, 1, 2, 3 or 4; and the second value is equal to transmission power of the third signal.

14. A method in a second node for wireless communications, comprising:

transmitting a first signal; and

receiving a third signal in a first radio resource pool;

wherein the first signal is used for determining first information, the first information being related to channel quality between the second node and a receiver of the first signal; a second signal is used for determining second information, the second information being related to channel quality between a transmitter of the second signal and a receiver of the second signal; the second node is different from the transmitter of the second signal; the first information and the second information are used together for determining a magnitude of time-domain resources occupied by the third signal; the first information is used for calculating a first value, and the second information is used for calculating a second value; when a difference value between the first value and the second value is less than a first threshold, a transmission format of the third signal is a first format; otherwise, the transmission format of the third signal is a second format; a number of time-domain resources occupied by the first format is less than a number of the time-domain resources occupied by the second format, and the first threshold is a non-negative number.

15. The method in the second node according to claim 14 , wherein the transmission format of the third signal is one format in a first format set, and the first information and the second information are used together for determining the transmission format of the third signal out of the first format set.

16. The method in the second node according to claim 14 , comprising:

transmitting a fourth signal in a second radio resource pool; wherein the fourth signal carries a first bit block, and the third signal comprises indication information on whether the first bit block is correctly received;

or, comprising:

receiving a fifth signal; wherein the fifth signal is used for determining the second information;

or, comprising:

receiving a sixth signal; wherein the sixth signal is used for determining the first information.