Mitigating impact of power imbalance on remote data rate in wireless local area network

1. A method for wireless communications in a wireless local area network (WLAN) system, comprising:

transmitting, by a multi-radio user equipment (UE), a wireless local area network (WLAN) acknowledgement (ACK) packet at a first transmit power level to a WLAN access point in response to a first WLAN data packet; and

transmitting, by the multi-radio UE to the WLAN access point, a second WLAN data packet at a second transmit power level that is lower than the first transmit power level of the WLAN ACK packet.

2. The method of claim 1 , further comprising:

selecting the first transmit power level for the WLAN ACK packet according to a link quality of a broadband wireless modem of the multi-radio UE during operation of a WLAN radio of the multi-radio UE.

3. The method of claim 1 , further comprising:

selecting the first transmit power level for the WLAN ACK packet according to a level of interference to a broadband radio modem of the multi-radio UE from the WLAN ACK packet.

4. The method of claim 1 , further comprising:

storing an ACK power back-off level for a WLAN ACK packet transmit power level;

storing a data power back-off level for a WLAN data packet transmit power level;

transmitting the WLAN ACK packet at the first transmit power level based on the stored ACK power back-off level; and

transmitting the second WLAN data packet at the second transmit power level based on the stored data power back-off level.

5. The method of claim 4 , further comprising:

setting the stored data power back-off level according to a path-loss between a multi-radio station and a WLAN access point, an ACK packet physical layer rate and a predetermined power sensitivity of a receiver of the WLAN access point for receiving an ACK packet at the ACK packet physical layer rate.

6. The method of claim 4 , further comprising:

setting the stored data power back-off level according to a received signal strength of a wireless modem of the multi-radio UE, a path-loss between the multi-radio station and the WLAN access point, and a predetermined power sensitivity of a receiver of the WLAN access point for receiving an ACK packet at an ACK packet physical layer rate.

7. A multi-radio user equipment (UE) configured for wireless communications in a wireless local area network (WLAN) system, the apparatus comprising:

a memory; and

at least one processor coupled to the memory, the at least one processor being configured:

to transmit a wireless local area network (WLAN) acknowledgement (ACK) packet at a first transmit power level to a WLAN access point in response to a first WLAN data packet; and

to transmit, to the WLAN access point, a second WLAN data packet at a second transmit power level that is lower than the first transmit power level of the WLAN ACK packet.

8. The multi-radio UE of claim 7 , in which the at least one processor is further configured to select the first transmit power level for the WLAN ACK packet according to a link quality of a broadband wireless modem of the multi-radio UE during operation of a WLAN radio of the multi-radio UE.

9. The multi-radio UE of claim 7 , in which the at least one processor is further configured to select the first transmit power level for the WLAN ACK packet according to a level of interference to a broadband radio modem of the multi-radio UE from the WLAN ACK packet.

10. The multi-radio UE of claim 7 , in which the at least one processor is further configured:

to store an ACK power back-off level for a WLAN ACK packet transmit power level;

to store a data power back-off level for a WLAN data packet transmit power level;

to transmit the WLAN ACK packet at the first transmit power level based on the stored ACK power back-off level; and

to transmit the second WLAN data packet at the second transmit power level based on the stored data power back-off level.

11. The multi-radio UE of claim 10 , in which the at least one processor is further configured to set the stored data power back-off level according to a path-loss between the multi-radio UE and the WLAN access point, an ACK packet physical layer rate and a predetermined power sensitivity of a receiver of the WLAN access point for receiving an ACK packet at the ACK packet physical layer rate.

12. The multi-radio UE of claim 10 , in which the at least one processor is further configured to set the stored data power back-off level according to a received signal strength of a wireless modem of the multi-radio multi-radio UE, a path-loss between the multi-radio multi-radio UE and the WLAN access point, and a predetermined power sensitivity of a receiver of the WLAN access point for receiving an ACK packet at an ACK packet physical layer rate.

13. A computer program product configured for wireless communications in a wireless local area network (WLAN) system, the computer program product comprising:

a non-transitory computer-readable medium having non-transitory program code recorded thereon, the program code comprising:

program code to transmit, by a multi-ratio user equipment (UE), a wireless local area network (WLAN) acknowledgement (ACK) packet at a first transmit power level to a WLAN access point in response to a first WLAN data packet; and

program code to transmit, by the multi-radio (UE) to the WLAN access point, a second WLAN data packet at a second transmit power level that is lower than the first transmit power level of the WLAN ACK packet.

14. The computer program product of claim 13 , in which the program code further comprises program code to select the first transmit power level for the WLAN ACK packet according to a link quality of a broadband wireless modem during operation of a WLAN radio of the multi-radio UE.

15. A apparatus configured for wireless communications in a wireless local area network (WLAN) system, the apparatus comprising:

means for transmitting, by a multi-radio user equipment (UE), a wireless local area network (WLAN) acknowledgement (ACK) packet at a first transmit power level to a WLAN access point in response to a first WLAN data packet; and

means for transmitting, by the multi-radio UE to the WLAN access point, a second WLAN data packet at a second transmit power level that is lower than the first transmit power level of the WLAN ACK packet.

16. The apparatus of claim 15 , further comprising means for selecting the first transmit power level for the WLAN ACK packet according to a link quality of a broadband wireless modem of the multi-radio UE during operation of a WLAN radio of the multi-radio-UE.

17. A method of wireless communication in a wireless local area network (WLAN) system, comprising:

selecting, by a multi-radio user equipment (UE), a wireless local area network (WLAN) acknowledgement (ACK) packet transmit data rate different from a data rate at which a WLAN data packet is received from a WLAN access point, in which the WLAN ACK packet transmit data rate is selected by assuming that a transmit data rate of the WLAN data packet is a lowest data rate specified in a WLAN basic service set; and

transmitting, by the multi-radio UE to the WLAN access point, a WLAN ACK packet at the selected WLAN ACK packet transmit data rate.

18. A multi-radio user equipment (UE) configured for wireless communications in a wireless local area network (WLAN) system, the apparatus comprising:

a memory; and

at least one processor coupled to the memory, the at least one processor being configured:

to select a wireless local area network (WLAN) acknowledgement (ACK) packet transmit data rate different from a data rate at which a WLAN data packet is received from a WLAN access point, in which the WLAN ACK packet transmit data rate is selected by assuming that a transmit data rate of the WLAN data packet is a lowest data rate specified in a WLAN basic service set; and

to transmit, to the WLAN access point, a WLAN ACK packet at the selected WLAN ACK packet transmit data rate.

19. A computer program product configured for wireless communications in a wireless local area network (WLAN) system, the computer program product comprising:

a non-transitory computer-readable medium having non-transitory program code recorded thereon, the program code comprising:

program code to select, by a multi-radio user equipment (UE), a wireless local area network (WLAN) acknowledgement (ACK) packet transmit data rate different from a data rate at which a WLAN data packet is received from a WLAN access point, in which the WLAN ACK packet transmit data rate is selected by assuming that a transmit data rate of the WLAN data packet is a lowest data rate specified in a WLAN basic service set; and

program code to transmit, by the multi-radio user equipment (UE), to the WLAN access point, a WLAN ACK packet at the selected WLAN ACK packet transmit data rate.

20. A apparatus configured for wireless communications in a wireless local area network (WLAN) system, the apparatus comprising:

means for selecting, by a multi-radio user equipment/UE, a wireless local area network (WLAN) acknowledgement (ACK) packet transmit data rate different from a data rate at which a WLAN data packet is received from a WLAN access point, in which the WLAN ACK packet transmit data rate is selected by assuming that a transmit data rate of the WLAN data packet is a lowest data rate specified in a WLAN basic service set; and

means for transmitting, by the multi-radio UE to the WLAN access point, a WLAN ACK packet at the selected WLAN ACK packet transmit data rate.