Method and device in node for wireless communication

1. A first node for wireless communication, comprising:

a first receiver, configured to receive a first radio signal and a second radio signal; and

a first transmitter, configured to transmit first information when a trigger condition is met;

wherein:

the first radio signal and the second radio signal are used for determining a channel quality of a first link between the first node and a third node, and a channel quality of a second link between the first node and a second node, respectively;

the channel quality of the first link and the channel quality of the second link are used for determining the trigger condition;

a first power value for radio transmission on the first link is determined using the channel quality of the first link;

a second power value for radio transmission on the second link is determined using the channel quality of the second link;

the first information comprises a first parameter indicating a difference between a first maximum power value and the first power value, and a second parameter indicating a difference between the second maximum power value and the second power value;

the first maximum power value is configured to limit power values of radio signals transmitted by the first node on the first link; and

the second maximum power value is configured to limit power values of radio signals transmitted by the first node on the second link.

2. The first node according to claim 1 , wherein the trigger condition is met when a change in the channel quality of the second link is greater than a second specific threshold and a change in the channel quality of the first link is greater than a first specific threshold.

3. The first node according to claim 1 , further comprising a first timer and a second timer configured by Radio Resource Control signalings, respectively timing the first link and the second link; wherein both the first timer and the second timer have expired when the first node transmits the first information.

4. The first node according to claim 1 , wherein:

the first radio signal is one of a plurality of first-type radio signals;

the first-type radio signals are used for determining a plurality of first-type channel qualities respectively;

the channel quality of the first link is one of the first-type channel qualities; and

each of the first-type radio signals comprises a reference signal.

5. The first node according to claim 1 , wherein the first information comprises the first maximum power value.

6. A base station for wireless communication, comprising:

a transmitter, configured to transmit a radio signal; and

a receiver, configured to receive first information from a first terminal; wherein:

the base station receives the first information when a trigger condition is met, wherein the trigger condition is determined based on a channel quality of a first link between the first terminal and a second terminal, and a channel quality of a second link between the first terminal and the base station;

the channel quality of the first link is determined based on a first radio signal, and is used for determining a first power value for radio transmission on the first link;

the channel quality of the second link is determined based on the radio signal, and is used for determining a second power value for radio transmission on the second link;

the first information comprises a first parameter indicating a difference between a first maximum power value and the first power value, and a second parameter indicating a difference between the second maximum power value and the second power value;

the first maximum power value is configured to limit power values of radio signals transmitted by the first terminal on the first link; and

the second maximum power value is configured to limit power values of radio signals transmitted by the first terminal on the second link.

7. The base station according to claim 6 , the trigger condition is met when a change in the channel quality of the second link is greater than a second specific threshold and a change in the channel quality of the first link is greater than a first specific threshold.

8. The base station according to claim 6 , wherein:

the base station transmits second information to the first terminal through Radio Resource Control signalings, comprising timer configurations for respectively configuring a first timer of the first link and a second timer of the second link; wherein:

the first radio signal is one of a plurality of first-type radio signals;

the first-type radio signals are used by the first terminal to determine a plurality of first-type channel qualities respectively;

the channel quality of the first link is one of the first-type channel qualities; and

each of the first-type radio signals comprises a reference signal.

9. The base station according to claim 6 , wherein the first information comprises the first maximum power value.

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

receiving a first radio signal and a second radio signal; and

respectively determining a channel quality of a first link between the first node and a third node, and a channel quality of a second link between the first node and a second node using the first radio signal and the second radio signal;

determining a trigger condition using the channel quality of the first link and the channel quality of the second link; and

transmitting first information when a trigger condition is met wherein:

the first information comprises a first parameter; indicating a difference between a first maximum power value and the first power value, and a second parameter indicating a difference between a second maximum power value and the second power value;

the first maximum power value is configured to limit power values of radio signals transmitted by the first node on the first link; and

the second maximum power value is configured to limit power values of radio signals transmitted by the first node on the second link.

11. The method in the first node according to claim 10 , wherein the trigger condition is met when a change in the channel quality of the second link is greater than a second specific threshold and a change in the channel quality of the first link is greater than a first specific threshold.

12. The method in the first node according to claim 10 , further comprising configuring a first timer and a second timer by Radio Resource Control signalings—respectively for the first link and the second link; wherein both the first timer and the second timer have expired when the first node transmits the first information.

13. The method in the first node according to claim 10 , further comprising determining a plurality of first-type channel qualities respectively using a plurality of first-type radio signals; wherein:

the first radio signal is one of the plurality of first-type radio signals;

the channel quality of the first link is one of the plurality of first-type channel qualities; and

each of the first-type radio signals comprises a reference signal.

14. The method in the first node according to claim 10 , wherein the first information comprises the first maximum power value.

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

transmitting a radio signal; and

receiving first information from a first terminal when a trigger condition is met; wherein:

the trigger condition is determined based on a channel quality of a first link between the first terminal and a second terminal, and a channel quality of a second link between the first terminal and the base station;

the channel quality of the first link is determined based on a first radio signal, and is used for determining a first power value;

the channel quality of the second link is determined based on the radio signal, and is used for determining a second power value;

the first information comprises a first parameter indicating a difference between a first maximum power value and the first power value, and a second parameter indicating a difference between the second maximum power value and the second power value;

transmitted power values of radio signals transmitted by the first terminal on the first link are limited by the first maximum power value; and

transmitted power values of radio signals transmitted by the first terminal on the second link are limited by the second maximum power value.

16. The method in the base station according to claim 15 , wherein the trigger condition is met when a change in the channel quality of the second link is greater than a second specific threshold and a change in the channel quality of the first link is greater than a first specific threshold.

17. The method in the base station according to claim 15 , wherein:

the base station transmits second information to the first terminal through Radio Resource Control signalings, comprising timer configurations for respectively configuring a first timer of the first link and a second timer of the second link;

the first radio signal is one of a plurality of first-type radio signals; the first-type radio signals are used by the first terminal to determine a plurality of first-type channel qualities respectively;

the channel quality of the first link is one of the first-type channel qualities; and

each of the first-type radio signals comprises a reference signal.

18. The method in the base station according to claim 15 , wherein the first information comprises the first maximum power value.