Relay systems and methods for wireless networks

1. A wireless station configured to transmit at a first station-transmission power level during a first time period and a second station-transmission power level during a second time period, the second station-transmission power level being a reduced station-transmission power level as compared to the first station-transmission power level, the wireless station comprising:

a memory configured to store program code;

a communication interface configured to exchange data with external devices; and

a processor communicatively coupled to the memory and the communication interface, the processor configured to execute the program code to:

determine that a wireless network provides relay service, the wireless network comprising an access point and one or more relay nodes;

transmit, via the communication interface, a relay-service desirability indication to the access point;

receive, via the communication interface, a relay-service confirmation from the access point; and

transmit, via the communication interface, an uplink transmission at the second station-transmission power level responsive to the relay-service confirmation from the access point.

2. The wireless station of claim 1 , wherein the processor is further configured to cause the communication interface to transmit the relay-service desirability indication at the second station-transmission power level, and

wherein the relay-service desirability indication indicates that the wireless station requests to use the relay service.

3. The wireless station of claim 1 , wherein the processor is further configured to receive a relay-service availability indication from the access point to determine whether the wireless network provides relay service, the relay-service availability indication indicating that the wireless network provides relay service.

4. The wireless station of claim 3 , wherein the processor is further configured to:

receive, via the communication interface, a beacon frame from the access point to receive the relay-service availability indication,

transmit, via the communication interface, an association request to the access point to transmit the relay-service desirability indication, and

receive, via the communication interface, an association response from the access point to receive the relay-service confirmation.

5. The wireless station of claim 1 , wherein the processor is further configured to:

prior to the transmitting of the relay-service desirability indication, determine whether to utilize the relay service, and

wherein the processor causes the relay-service desirability indication to be transmitted in response to determining to utilize the relay service.

6. The wireless station of claim 1 , wherein the processor transmits, via the communication interface, the uplink transmission for forwarding by at least one relay node without identifying the at least one relay node in the uplink transmission.

7. The wireless station of claim 1 , wherein the second station-transmission power level is specified in a received transmission from the access point.

8. The wireless station of claim 1 , wherein the processor is configured to transmit the relay-service desirability indication at the second station-transmission power level.

9. The wireless station of claim 1 , wherein the processor is further configured to receive downlink transmissions from the access point via the communication interface without relay.

10. The wireless station of claim 1 , wherein the processor is further configured to:

transmit, via the communication interface, a request-to-send message for forwarding by one or more relay nodes to the access point, and

receive, via the communication interface, a clear-to-send message from the access point without relay.

11. A method comprising, by a wireless station:

determining that a wireless network provides relay service, the wireless network comprising an access point and one or more relay nodes;

transmitting a relay-service desirability indication to the access point;

receiving a relay-service confirmation from the access point;

wherein the wireless station is configured to transmit at a first station-transmission power level during a first time period and a second station-transmission power level during a second time period, the second station-transmission power level being a reduced station-transmission power level as compared to the first station-transmission power level; and

transmitting an uplink transmission at the second station-transmission power level responsive to the relay-service confirmation from the access point.

12. The method of claim 11 , wherein:

the relay-service desirability indication is transmitted at the second station-transmission power level; and

the relay-service desirability indication indicates that the wireless station requests to use the relay service.

13. The method of claim 11 , wherein the determining comprises receiving a relay-service availability indication from the access point, the relay-service availability indication indicating that the wireless network provides relay service.

14. The method of claim 13 , wherein:

the relay-service availability indication is received in a beacon frame from the access point;

the transmitting of the relay-service desirability indication comprises transmitting an association request to the access point, the association request comprising the relay-service desirability indication; and

the receiving of the relay-service confirmation comprises receiving an association response from the access point, the association response comprising the relay-service confirmation.

15. The method of claim 11 , comprising:

prior to the transmitting of the relay-service desirability indication, determining whether to utilize the relay service; and

wherein the transmitting of the relay-service desirability indication is performed responsive to a determination to utilize the relay service.

16. The method of claim 11 , wherein the wireless station transmits the uplink transmission for forwarding by at least one relay node without identifying the at least one relay node in the uplink transmission.

17. The method of claim 11 , wherein the second station-transmission power level is specified in a received transmission from the access point.

18. The method of claim 11 , wherein the relay-service desirability indication is transmitted at the second station-transmission power level.

19. The method of claim 11 , comprising receiving downlink transmissions from the access point without relay.

20. The method of claim 11 , comprising:

transmitting a request-to-send message for forwarding by one or more relay nodes to the access point; and

receiving a clear-to-send message from the access point without relay.