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Method and device for power control

By generating the filtered signal quality value in the wireless communication system, and adjusting the filtered signal quality value based on the reference signal quality value difference and the change in transmit power, the problem of the deviation between the filtered signal quality value and the reference signal quality value in the wireless communication system is solved, achieving It provides fast anti-packet detection and correct power control, improving power resource utilization efficiency and service quality.

Inactive Publication Date: 2007-11-28
ERICSSON AB PATENT UNIT LTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If this deviation cannot be estimated, then a looser upper and lower bound on unwrapping in equation (1) would need to be used, leading to the problems mentioned above
SIR ref with SIR filt Deviations between values ​​may also lead to incorrect TPC commands, thus not utilizing the power resources of the communication system in an optimal manner

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 4 example

[0073] If SIR ref，n ≠SIR ref，n-1 ,

[0074] SIR filt , n , dB = λ SIR _ in ( SIR est , n . dB - TPC command Δ TPC - 10 log 10 ρ - SIR filt , n - 1 , dB ) + TPC command Δ ...

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PUM

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Abstract

A method for generating a filtered signal quality value used in a power control system of a wireless communication apparatus. An estimated signal quality value of a received signal is generated. A filtered signal quality value is generated based on the estimated signal quality value. The filtered signal quality value is generated in dependence of at least one of registering a difference between afirst and a second reference signal quality value, and a change in transmitted power of said received signal. A power control device (20) comprising a signal quality estimator (23), a BLER estimator (22), a regulator (24), and an inner loop (25) is configured to implement the method.

Description

technical field [0001] The present invention relates generally to a method for power control in a wireless communication device operating in a wireless communication system, and more particularly to a method for generating a filtered signal quality value for use in a power control system of a wireless communication device . The invention also relates to a power control device configured to implement the method according to the invention. Background technique [0002] FIG. 1 shows an example of a power control apparatus of a base station or a UE (User Equipment) for communication uplink or downlink in a wireless communication system such as a WCDMA (Wideband Code Division Multiple Access) communication system. The outer control loop sets the reference signal-to-interference value (SIR) based on the offset of the estimated block error rate (BLER) from the reference block error rate. ref ). The estimated BLER may be provided by a BLER estimator. The inner loop will then est...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/005
CPCH04W52/44H04W52/24H04W52/225H04W52/36H04W52/12H04W28/16H04W52/265
Owner ERICSSON AB PATENT UNIT LTE