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Power control methods and apparatus

A technology of power headroom and transmit power, applied in power management, wireless communication, electrical components, etc., can solve problems such as insufficient support for multiple component carriers and reduction of maximum transmit power

Active Publication Date: 2015-07-15
INTERDIGITAL PATENT HLDG INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additional constraints such as the WTRU's power class, its PA capabilities, etc. may reduce the maximum transmit power used by the WTRU for headroom calculations
[0007] LTE R8 and R9 methods for calculating and signaling power headroom and other power control related data may not be sufficient to support multiple component carriers (CCs) which may require multiple WTRU PAs

Method used

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  • Power control methods and apparatus
  • Power control methods and apparatus
  • Power control methods and apparatus

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Embodiment

[0244] 1. A method for reporting power headroom for simultaneous Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) transmissions occurring on a component carrier, the method comprising at least based on PUSCH transmit power and PUCCH transmit power to determine the power headroom.

[0245] 2. The method of embodiment 1, further comprising communicating the power headroom.

[0246] 3. The method as in any preceding embodiment, further comprising deriving the PUCCH transmit power from the reference format in the absence of PUCCH transmission.

[0247] 4. The method as in any preceding embodiment, wherein the reference format is Downlink Control Information Format 1A.

[0248] 5. The method as in any preceding embodiment, further comprising determining a PUSCH power headroom.

[0249] 6. The method as in any preceding embodiment, further comprising transmitting a PUSCH power headroom.

[0250] 7. The method as in any preceding embodiment, further c...

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Abstract

Methods and apparatus for power control are described. Methods are included for calculating and signaling power control related data to support multiple component carriers (CCs) for which transmission may be accomplished with one or more WTRU power amplifiers (PAs). Methods are included for calculating and signaling one or more of CC-specific power control related data and PA-specific power control related data. The power control related data may include one or more of maximum power, power headroom, and transmit power. Methods for selecting which power control related data to exchange are included. Methods are included for calculating and signaling power control related data for physical UL shared channel (PUSCH), physical UL control channel (PUCCH), and simultaneous PUSCH and PUCCH transmission.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of serial numbers 61 / 247,676 filed October 1, 2009, 61 / 248,373 filed October 2, 2009, 61 / 285,343 filed December 10, 2009, and The benefit of US Provisional Applications No. 61 / 329,194, filed April 29, 2010, and No. 61 / 356,472, filed June 18, 2010, the contents of which are hereby incorporated by reference. technical field [0003] This application relates to wireless communications. Background technique [0004] The transmit power of the WTRU may be determined in the WTRU based on measurements made by the WTRU and data received from an evolved Node B (eNodeB). WTRU transmit power control may be used to maintain quality of service (QoS), control inter-cell interference, maximize the WTRU's battery life, and the like. [0005] In 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE), uplink (UL) power control can be used to compensate for long-term fading (including pat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/24H04W52/36
CPCH04W52/325H04W52/34H04W52/244H04W52/365H04W52/146
Inventor J·W·哈伊姆辛颂尧J·A·斯特恩-波科维茨P·艾杰佩尔
Owner INTERDIGITAL PATENT HLDG INC