Uplink data routing during multiple carrier power imbalance

1. A method of a user equipment (UE) controlling dual carrier uplink transmission for wireless communications, comprising:

determining, by the UE, a power imbalance between a first radio frequency (RF) carrier and a second RF carrier of a dedicated physical control channel for uplink transmission;

determining, by the UE, whether the power imbalance is greater than a power imbalance threshold; and

blocking, by the UE, data transmission on one of the first RF carrier or the second RF carrier when the power imbalance is greater than the power imbalance threshold.

2. The method of claim 1 , wherein blocking data transmission comprises:

blocking data transmission on an RF carrier having higher transmit power on a condition that the power imbalance is within a threshold range.

3. The method of claim 1 , further comprising:

wherein determining whether the power imbalance is greater than the power imbalance threshold includes determining whether the power imbalance is greater than a maximum power imbalance threshold;

determining, by the UE, when the power imbalance is not greater than the maximum power imbalance threshold, whether:

the power imbalance is greater than a minimum power imbalance threshold; and

an uplink block error rate (BLER) is greater than a BLER threshold; and

blocking, by the UE, data transmission on one of the first RF carrier or the second RF carrier when the power imbalance is not greater than the maximum power imbalance threshold and is greater than the minimum power imbalance threshold, and when the BLER is greater than the BLER threshold.

4. The method of claim 3 , wherein blocking data transmission comprises:

blocking data transmission on an RF carrier having severe BLER or residual BLER on a condition that the power imbalance exceeds the minimum power imbalance threshold, where severe BLER is defined by exceeding a maximum number of consecutive block errors and residual BLER is defined by exceeding a maximum number of retransmission attempts without success.

5. The method of claim 3 , further comprising:

unblocking, by the UE, data transmission on a blocked RF carrier on a condition that the power imbalance becomes less than the minimum power imbalance threshold.

6. The method of claim 1 , further comprising limiting, by the UE, maximum throughput on an unblocked RF carrier to a reduced limit.

7. A method of a user equipment controlling dual carrier uplink transmission for wireless communications, comprising:

blocking, by the UE, data transmission on one of a first RF carrier or a second RF carrier in response to a determined power imbalance between the first radio frequency (RF) carrier and the second RF carrier of a dedicated physical control channel for uplink transmission;

setting, by the UE, an unblocking value to a minimum power imbalance threshold on a condition that the power imbalance is greater than a maximum power imbalance threshold;

setting, by the UE, the unblocking value to the determined power imbalance on a condition that the power imbalance is not greater than a maximum power imbalance threshold but is greater than a minimum power imbalance threshold and that a detected uplink block error rate (BLER) is greater than a BLER threshold; and

unblocking, by the UE, a blocked data transmission on the one of the first RF carrier or the second RF carrier on a first condition that the power imbalance is less than the minimum power imbalance threshold, or on a second condition that the power imbalance is less than the unblocking value minus a fixed margin value.

8. The method of claim 7 , further comprising:

reducing, by the UE, a reduced limit for maximum throughput on an unblocked carrier on a condition that the BLER remains greater than the BLER threshold.

9. A user equipment (UE) for controlling dual carrier uplink transmission for wireless communication, comprising:

a transceiver including a transmitter configuration of current transmit power settings for each of a plurality of RF carriers; and

a modem processor of the UE, coupled to the transceiver, including:

a power imbalance component configured to determine a power imbalance between a first radio frequency (RF) carrier and a second RF carrier of a dedicated physical control channel for uplink transmission based on the transmitter configuration and to determine whether the power imbalance is greater than a power imbalance threshold; and

a carrier blocking component configured to block data transmission on one of the first RF carrier or the second RF carrier when the power imbalance is greater than the power imbalance threshold.

10. The UE of claim 9 , wherein the carrier blocking component is further configured to block data transmission on an RF carrier having higher transmit power on a condition that the power imbalance is within a threshold range.

11. The UE of claim 9 , wherein the modem processor further includes:

a block error rate (BLER) detection component configured to detect BLER;

wherein the power imbalance component is further configured to:

determine whether the power imbalance is greater than the power imbalance threshold includes determining whether the power imbalance is greater than a maximum power imbalance threshold;

determine, when the power imbalance is not greater than the maximum power imbalance threshold, whether:

the power imbalance is greater than a minimum power imbalance threshold; and

an uplink block error rate (BLER) is greater than a BLER threshold; and

wherein the carrier blocking component is further configured to block data transmission on one of the first RF carrier or the second RF carrier when the power imbalance is not greater than the maximum power imbalance threshold and is greater than the minimum power imbalance threshold, and when the BLER is greater than the BLER threshold.

12. The UE of claim 11 , wherein the carrier blocking component is further configured to block data transmission on an RF carrier having severe BLER or residual BLER on a condition that the power imbalance exceeds the minimum power imbalance threshold, where severe BLER is defined by exceeding a maximum number of consecutive block errors and residual BLER is defined by exceeding a maximum number of retransmission attempts without success.

13. The UE of claim 9 , wherein the modem processor further includes a throughput setting component configured to limit maximum throughput on an unblocked RF carrier to a reduced limit.

14. The UE of claim 11 , wherein the carrier blocking component is further configured to unblock data transmission on a blocked RF carrier on a condition that the power imbalance becomes less than the minimum power imbalance threshold.

15. A user equipment (UE) for controlling dual carrier uplink transmission for wireless communication, comprising:

a transceiver including a transmitter configuration of current transmit power settings for each of a plurality of RF carriers; and

a modem processor of the UE, coupled to the transceiver, including a carrier blocking component configured to:

block data transmission on one of a first RF carrier or a second RF carrier in response to a determined power imbalance between the first radio frequency (RF) carrier and the second RF carrier of a dedicated physical control channel for uplink transmission based on the transmitter configuration;

set an unblocking value to a minimum power imbalance threshold on a condition that the power imbalance is greater than a maximum power imbalance threshold;

set the unblocking value to the determined power imbalance on a condition that the power imbalance is not greater than a maximum power imbalance threshold but is greater than a minimum power imbalance threshold and that a detected uplink block error rate (BLER) is greater than a BLER threshold; and

unblock data transmission on the one of the first RF carrier or the second RF carrier on a first condition that the power imbalance is less than the minimum power imbalance threshold, or on a second condition that the power imbalance is less than the unblocking value minus a fixed margin value.

16. The UE of claim 15 , further comprising a throughput setting component configured to reduce a reduced limit for maximum throughput on an unblocked RF carrier on a condition that the BLER remains greater than the BLER threshold.

17. A user equipment (UE) for controlling dual carrier uplink transmission for wireless communication, comprising:

means for determining a power imbalance between a first radio frequency (RF) carrier and a second RF carrier of a dedicated physical control channel for uplink transmission;

means for determining whether the power imbalance is greater than a power imbalance threshold; and

means for blocking data transmission, from the UE, on one of the first RF carrier or the second RF carrier when the power imbalance is greater than the power imbalance threshold.

18. The UE of claim 17 , wherein means for blocking data transmission blocks data transmission on an RF carrier having higher transmit power on a condition that the power imbalance is within a threshold range.

19. The UE of claim 17 , further comprising:

wherein means for determining whether the power imbalance is greater than the power imbalance threshold includes determining whether the power imbalance is greater than a maximum power imbalance threshold;

means for determining, when the power imbalance is not greater than the maximum power imbalance threshold, whether:

the power imbalance is greater than a minimum power imbalance threshold; and

an uplink block error rate (BLER) is greater than a BLER threshold; and

wherein the means for blocking data transmission on one of the first RF carrier or the second RF carrier blocks data transmission when the power imbalance is not greater than the maximum power imbalance threshold and is greater than the minimum power imbalance threshold, and when the BLER is greater than the BLER threshold.

20. The UE of claim 19 , wherein means for blocking data transmission blocks data transmission on an RF carrier having severe BLER or residual BLER on a condition that the power imbalance exceeds the minimum power imbalance threshold, where severe BLER is defined by exceeding a maximum number of consecutive block errors and residual BLER is defined by exceeding a maximum number of retransmission attempts without success.

21. The UE of claim 19 , further comprising:

means for unblocking data transmission on a blocked RF carrier on a condition that the power imbalance becomes less than the minimum power imbalance threshold.

22. The UE of claim 17 , further comprising means for limiting maximum throughput on an unblocked RF carrier to a reduced limit.

23. The UE of claim 17 , further comprising:

means for setting an unblocking value to a minimum power imbalance threshold on a condition that the power imbalance is greater than a maximum power imbalance threshold;

means for setting the unblocking value to the power imbalance on a condition that the power imbalance is not greater than a maximum power imbalance threshold but is greater than a minimum power imbalance threshold and that an uplink BLER is greater than a BLER threshold; and

means for unblocking a blocked data transmission on the one of the first RF carrier or the second RF carrier on a first condition that the power imbalance is less than the minimum power imbalance threshold, or on a second condition that the power imbalance is less than the unblocking value minus a fixed margin value.