Method and device for relay communication in a user equipment or a base station

1. A method for a base station for relay communication, comprising:

transmitting first information, the first information comprising a first power value and a first coefficient; and

transmitting a second wireless signal;

wherein the product of the first power value and the first coefficient is used to determine a transmission power of a first wireless signal; a transmitter of the first wireless signal is a first node; the second wireless signal is used to determine a second channel quality, the first information further comprises a second coefficient, and a product of the second channel quality and the second coefficient is used to determine the transmission power of the first wireless signal; the second channel quality is for a channel from a cell maintained by the base station to the first node; the second channel quality is a Pathloss of a wireless link of a serving cell of the base station to the first node; the transmission power of the first wireless signal is a smaller value of third power value and fifth power value; the third power value is fixed, or the third power value is explicitly configured, the fifth power value is associated with both the product of the first path loss and the first coefficient and the product of the second channel quality and the second coefficient; the first path loss decreases linearly as the first power value increases; the first power value is used to determine the first path loss; the first path loss is a path loss of a wireless link of the first node to the receiver of the first wireless signal; a physical layer channel including the first wireless signal is a Physical Sidelink Shared Channel.

2. The method according to claim 1 , wherein the first information is high layer signaling.

3. The method according to claim 1 , wherein the second wireless signal comprises Channel State Information Reference Signal.

4. A method for a user equipment for relay communication, comprising:

receiving first information, the first information comprising a first power value and a first coefficient; and

receiving a second wireless signal; and

transmitting a first wireless signal;

wherein the product of the first power value and the first coefficient is used to determine a transmission power of the first wireless signal; the second wireless signal is used to determine a second channel quality, the first information further comprises a second coefficient, and a product of the second channel quality and the second coefficient is used to determine the transmission power of the first wireless signal; the second channel quality is a Pathloss of a wireless link of a serving cell of a base station to the first node; the base station is a transmitter of the second wireless signal; the transmission power of the first wireless signal is a smaller value of third power value and fifth power value; the third power value is fixed, or the third power value is explicitly configured, the fifth power value is associated with both the product of the first path loss and the first coefficient and the product of the second channel quality and the second coefficient; the first path loss decreases linearly as the first power value increases; the first power value is used to determine the first path loss; the first path loss is a path loss of a wireless link of the user equipment to the receiver of the first wireless signal; a physical layer channel including the first wireless signal is a Physical Sidelink Shared Channel.

5. The method according to claim 4 , wherein

transmitting a third wireless signal;

wherein the third wireless signal is used to determine a first channel quality; the first channel quality is used to determine the first power value; a receiver of the third wireless signal comprises a second node; the second node and a transmitter of the first information are non-co-located.

6. The method according to claim 5 , wherein the first channel quality comprises an RSRP.

7. The method according to claim 4 , wherein the first coefficient is a non-negative number that is not greater than one; the second coefficient is a non-negative number that is not greater than one; the first coefficient is explicitly configured by the higher layer signaling.

8. The method according to claim 4 , wherein when the third power value is explicitly configured, the third power value is explicitly configured by RRC signaling.

9. The method according to claim 4 , wherein the first information is high layer signaling.

10. The method according to claim 4 , wherein the second wireless signal comprises Channel State Information Reference Signal.

11. A base station for relay communication, comprising:

a first processing module transmitting first information, the first information comprising a first power value and a first coefficient; and transmitting a second wireless signal;

wherein the product of the first power value and the first coefficient is used to determine a transmission power of a first wireless signal; a transmitter of the first wireless signal is a first node;

the second wireless signal is used to determine a second channel quality, the first information further comprises a second coefficient, and a product of the second channel quality and the second coefficient is used to determine the transmission power of the first wireless signal; the second channel quality is for a channel from a cell maintained by the base station to the first node; the second channel quality is a Pathloss of a wireless link of a serving cell of the base station to the first node; the transmission power of the first wireless signal is a smaller value of third power value and fifth power value; the third power value is fixed, or the third power value is explicitly configured, the fifth power value is associated with both the product of the first path loss and the first coefficient and the product of the second channel quality and the second coefficient; the first path loss decreases linearly as the first power value increases; the first power value is used to determine the first path loss; the first path loss is a path loss of a wireless link of the first node to the receiver of the first wireless signal; a physical layer channel including the first wireless signal is a Physical Sidelink Shared Channel.

12. The base station according to claim 11 , wherein the first information is high layer signaling.

13. The base station according to claim 11 , wherein the second wireless signal comprises Channel State Information Reference Signal.

14. A user equipment for relay communication, comprising:

A second processing module, receiving first information, the first information comprising a first power value and a first coefficient; and receiving a second wireless signal;

A first transmitting module, transmitting a first wireless signal;

wherein the product of the first power value and the first coefficient is used to determine a transmission power of the first wireless signal; the second wireless signal is used to determine a second channel quality, the first information further comprises a second coefficient, and a product of the second channel quality and the second coefficient is used to determine the transmission power of the first wireless signal; the second channel quality is a Pathloss of a wireless link of a serving cell of a base station to the first node; the base station is a transmitter of the second wireless signal; the transmission power of the first wireless signal is a smaller value of third power value and fifth power value; the third power value is fixed, or the third power value is explicitly configured, the fifth power value is associated with both the product of the first path loss and the first coefficient and the product of the second channel quality and the second coefficient; the first path loss decreases linearly as the first power value increases; the first power value is used to determine the first path loss; the first path loss is a path loss of a wireless link of the user equipment to the receiver of the first wireless signal; a physical layer channel including the first wireless signal is a Physical Sidelink Shared Channel.

15. The user equipment according to claim 14 , wherein the second processing module transmitting a third wireless signal; the third wireless signal is used to determine a first channel quality; the first channel quality is used to determine the first power value; a receiver of the third wireless signal comprises a second node; the second node and a transmitter of the first information are non-co-located.

16. The user equipment according to claim 15 , wherein the first channel quality comprises an RSRP.

17. The user equipment according to claim 14 , wherein the first coefficient is a non-negative number that is not greater than one; the second coefficient is a non-negative number that is not greater than one; the first coefficient is explicitly configured by the higher layer signaling.

18. The user equipment according to claim 14 , wherein when the third power value is explicitly configured, the third power value is explicitly configured by RRC signaling.

19. The user equipment according to claim 14 , wherein the first information is high layer signaling.

20. The user equipment according to claim 14 , wherein the second wireless signal comprises Channel State Information Reference Signal.