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Method and system for outer ring power control based on selfadaptive error rate measuring

A technology of outer loop power control and power control command, applied in transmission control/equalization, power management, communication between multiple stations, etc. and other problems to achieve fast convergence and track channel changes, reduce measurement time, and overcome complexity.

Inactive Publication Date: 2004-03-31
UT STARCOM CHINA
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Problems solved by technology

[0020] In the above method and system, the transmission channel BER (TrCH BER) at the front end of the channel decoder is used to adjust the SIR target value, which can significantly reduce the measurement time, quickly converge and track channel changes, and overcome the previous block error rate based on BLER. The algorithm converges too slowly under high-quality services and is not easy to implement, so as to quickly and adaptively adjust the target SIR to achieve "neither too bad nor too good" BER performance

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  • Method and system for outer ring power control based on selfadaptive error rate measuring
  • Method and system for outer ring power control based on selfadaptive error rate measuring
  • Method and system for outer ring power control based on selfadaptive error rate measuring

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Embodiment Construction

[0033] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the various drawings, similar elements are provided with similar numerals.

[0034] first preferred embodiment

[0035] FIG. 2 is a block diagram of a process for implementing reverse closed-loop power control according to the present invention. In FIG. 2, a BER measurer 201 is placed in front of the decoder 205, that is, the transport channel BER (TrCH BER) is measured at the input of the decoder. The BER measuring device 201 here can be any BER measuring device in the prior art. Although it is shown in the figure that the BER measurement unit is located between the decoder and the deinterleaver, those skilled in the art can understand that the BER measurement unit can be located before the decoder at other positions where BER measurement can be implemented, for example, when the BER measurement unit When BER measurements are obtained by uti...

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Abstract

The invention provides self adapting external ring power control method and the system based on BER measurement. The method includes following steps: measures the value of BER at the front of the decoder; adjusts the target SIR value based on the measured BER value; compares the SIR target value and SIR measurement value, and generates power control order. The method and reduces the measurement time, and is easy to be realized.

Description

technical field [0001] The invention relates to the field of mobile communication, more specifically, to an adaptive outer loop power control method and system based on bit error rate BER measurement in the third generation mobile communication system. Background technique [0002] In Direct Spread Spectrum / Code Division Multiple Access (DS / CDMA) mobile communication systems, traditional RAKE receivers require strict power control techniques to achieve satisfactory performance. In the third generation mobile communication system, such as UMTS, WCDMA, cdma2000 and other systems, power control is divided into open-loop power control and closed-loop power control. The open-loop control technique is a rough estimate of the channel fading, while the closed-loop power control can effectively track the fast fading of the signal. Closed-loop power control consists of two parts: fast inner-loop control and outer-loop control. The fast inner loop control adjusts the transmit power o...

Claims

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Application Information

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IPC IPC(8): H04B7/005
CPCH04W52/20H04W52/12
Inventor 徐志宇赵柏峻
Owner UT STARCOM CHINA
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