Call sustainability during power imbalance in multicarrier uplink

Patent metadata

Field	Value
Publication number	US-2016183200-A1
Application number	US-201514790819-A
Country	US
Kind code	A1
Filing date	Jul 2, 2015
Priority date	Dec 19, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

In aspects for controlling transmit power of dual carrier uplink transmission for wireless communications, a user equipment (UE) determines presence of transmit power imbalance between a first and second radio frequency (RF) carrier of respective dedicated physical control channels for uplink transmission. The UE determines an estimate of a remaining available transmit power after estimating the transmit power used by each of the dedicated physical control channels. The UE allocates the estimated remaining available transmit power to the first and second RF carrier respectively based on both a size of data granted for uplink transmission on each RF carrier and on an effective power per bit on each RF carrier. Additionally, the UE determines a higher reliability value for each RF carrier based on a lower data error rate, identifies priority values for data to be transmitted and sends higher priority data over the RF carrier with higher reliability value.

First claim

What is claimed is:

1 . A method of a user equipment controlling transmit power of multiple carrier uplink transmissions for wireless communications, comprising:
determining presence of a transmit power imbalance between a first radio frequency (RF) carrier and a second RF carrier of respective dedicated physical control channels for uplink transmission; determining an estimate of a remaining available transmit power after estimating the transmit power used by each of the dedicated physical control channels; and allocating, in response to determining presence of the transmit power imbalance, an estimated remaining available transmit power to the first RF carrier and the second RF carrier respectively based on both a size of data granted for uplink transmission on each RF carrier and on an effective power per bit on each RF carrier.

2 . The method of claim 1 , further comprising:
determining that the first RF carrier has an effective power per bit value that is less than that of the second RF carrier, and in response thereto, allocating more available transmit power to the first RF carrier than to the second RF carrier and allowing an increased amount of data transmission on the first RF carrier.

3 . The method of claim 2 , further comprising:
normalizing data grant values and power efficiency values; and applying a weighting value to at least the power efficiency to bias the allocating of remaining available transmit power to the first RF carrier.

4 . A method of a user equipment scheduling multiple carrier uplink data transmissions for wireless communications, comprising:
determining presence of a power imbalance between a first radio frequency (RF) carrier and a second RF carrier of respective dedicated physical control channels for uplink transmission; determining a reliability value for each RF carrier based on a data error rate, wherein a higher reliability value corresponds with a lower data error rate; identifying data to be transmitted as having a first priority value or second priority value, wherein data with the first priority value has a higher priority than data with the second priority value; and sending, in response to determining presence of the transmit power imbalance, at least a portion of the data having the first priority value over the RF carrier with a higher reliability value.

5 . The method of claim 4 , wherein the data error rate is based on a bit error rate (BER).

6 . The method of claim 4 , wherein the data error rate is based on a block error rate (BLER).

7 . The method of claim 4 , further comprising sending less data on the RF carrier having a lower reliability value.

8 . The method of claim 4 , further comprising sending no data on the RF carrier having a lower reliability value.

9 . The method of claim 4 , further comprising sending redundant higher priority data concurrently on the RF carrier having a lower reliability value.

10 . The method of claim 4 , wherein the determining of the reliability value is further based on a power requirement of each RF carrier, and wherein a higher reliability value corresponds with a lower power requirement.

11 . A user equipment (UE) for scheduling multiple carrier uplink data transmissions for wireless communications, comprising:
a power imbalance function to determine presence of a transmit power imbalance between a first radio frequency (RF) carrier and a second RF carrier of respective dedicated physical control channels for uplink transmission; a carrier power division function to determine an estimate of a remaining available transmit power after estimating the transmit power used by each of the dedicated physical control channels; and to estimate, in response to determining presence of the transmit power imbalance, remaining available transmit power to the first RF carrier and the second RF carrier respectively based on both a size of data granted for uplink transmission on each RF carrier and on an effective power per bit on each RF carrier.

12 . The UE of claim 11 , further comprising:
a power allocation function to determine that the first RF carrier has an effective power per bit value that is less than that of the second RF carrier, and in response thereto, allocate more available transmit power to the first RF carrier than to the second RF carrier and allowing an increased amount of data transmission on the first RF carrier.

13 . The UE of claim 12 , wherein the power allocation function further normalizes data grant values and power efficiency values; and applies a weighting value to at least the power efficiency to bias the allocating of remaining available transmit power to the first RF carrier.

14 . A user equipment (UE) for scheduling multiple carrier uplink data transmissions for wireless communications, comprising:
a power imbalance function to determine presence of a power imbalance between a first radio frequency (RF) carrier and a second RF carrier of respective dedicated physical control channels for uplink transmission; a carrier data division function to determine a reliability value for each RF carrier based on a data error rate, wherein a higher reliability value corresponds with a lower data error rate; to identify data to be transmitted as having a first priority value or second priority value, wherein data with the first priority value has a higher priority than data with the second priority value; and to send, in response to determining presence of the transmit power imbalance, the data having the first priority value over the RF carrier with a higher reliability value.

15 . The UE of claim 14 , wherein the data error rate is based on a bit error rate (BER).

16 . The UE of claim 14 , wherein the data error rate is based on a block error rate (BLER).

17 . The UE of claim 14 , further comprising a data priority function to send less data on the RF carrier having a lower reliability value.

18 . The UE of claim 14 , further comprising a data priority function to send no data on the RF carrier having a lower reliability value.

19 . The UE of claim 14 , further comprising a data priority function to send redundant higher priority data simultaneously on the RF carrier having a lower reliability value.

20 . The UE of claim 14 , further comprising a carrier reliability function to determine the reliability value based on a power requirement of each RF carrier, and wherein a higher reliability value corresponds with a lower power requirement.

Assignees

• Qualcomm Inc

Inventors

• Kanamarlapudi Sitaramanjaneyulu
• Chakravarthy Chetan Gopalakrishnan
• Hsu Liangchi

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04W72/0473

  the resource being transmission power · CPC title

• H04W52/34 Primary

  TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading · CPC title

• H04W72/0406

  Electricity · mapped topic

• H04W52/343 Primary

  taking into account loading or congestion level · CPC title