Call sustainability during power imbalance in multicarrier uplink

• US 9,398,546 B2
• Filed: 07/02/2015
• Issued: 07/19/2016
• Est. Priority Date: 12/19/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Kanamarlapudi, Sitaramanjaneyulu, Chakravarthy, Chetan Gopalakrishnan, Hsu, Liangchi
• Primary Examiner(s): DEAN, RAYMOND S
• Application Number:
  US14/790,819
• Publication Number:
  US 20160183200A1
• Time in Patent Office: 383 Days
• Field of Search: 455/522, 370/318
• US Class Current: 1/1
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/267 taking into account the information rate
• CPC Class Codes: H04W 52/34 TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 52/346 distributing total power among users or channels
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

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.

Claims

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 user equipment (UE) for scheduling multiple carrier uplink data transmissions for wireless communications, comprising:

a processor; and

a memory coupled to the processor, wherein the memory includes instructions executable by the processor 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;

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 allocate, 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.

5. The UE of claim 4, wherein the instructions are further executable by the processor 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.

6. The UE of claim 5, wherein the instructions are further executable by the processor to normalize data grant values and power efficiency values;

and apply a weighting value to at least the power efficiency to bias the allocating of remaining available transmit power to the first RF carrier.

7. An apparatus of a user equipment controlling transmit power of multiple carrier uplink transmissions for wireless communications, comprising:

means for 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;

means for determining an estimate of a remaining available transmit power after estimating the transmit power used by each of the dedicated physical control channels; and

means for 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.

8. The apparatus of claim 7, further comprising:

means for 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, means for 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.

9. The apparatus of claim 8, further comprising:

means for normalizing data grant values and power efficiency values; and

means for applying a weighting value to at least the power efficiency to bias the allocating of remaining available transmit power to the first RF carrier.