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Outer loop transmit power control using channel-adaptive processing

A transmission power control, outer loop technology, applied in transmission control/equalization, power management, multiplexing communication, etc.

Inactive Publication Date: 2004-12-22
INTERDIGITAL TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the outer loop power control is based on CRC checks, it often takes a long time to focus on the target SIR required for low BLER

Method used

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  • Outer loop transmit power control using channel-adaptive processing
  • Outer loop transmit power control using channel-adaptive processing
  • Outer loop transmit power control using channel-adaptive processing

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Embodiment Construction

[0019] The preferred embodiments will be described with reference to the drawings, wherein like reference numerals refer to like components throughout.

[0020] figure 2 A schematic diagram illustrating a wireless spread spectrum code division multiplexing (CDMA) or time division duplex (TDD) communication system 18 is shown. The system 18 includes a plurality of Sites Bs 26 , 32 , 34 , a plurality of Radio Network Controllers (RNCs) 36 , 38 , 40 , a plurality of User Equipments (UEs) 20 , 22 , 24 , and a central network 46 . A plurality of points Bs 26 , 32 , 34 are connected to a plurality of RNCs 36 , 38 , 40 which in turn are connected to a central network 46 . Each point B, such as point 26, communicates with an associated UE 20-24. Point B 26 has a single base station 30 or multiple base stations 30 1 ,...30 n Associated with a single position controller (SC).

[0021] Although the present invention is intended to work with one or more UEs, Point Bs and RNCs, for s...

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Abstract

The present invention is a system and method which controls outer loop transmit power for transmission power of an uplink / downlink communication in a wireless communication system. The system receives a communication from a base station and determines an error rate on the received communication. The system then distinguishes between static and dynamic channels, produces a static adjustment value, and characterizes the dynamic channels to generate a dynamic adjustment value. The target power level is then adjusted by the static and dynamic adjustment values, setting the transmission power level.

Description

technical field [0001] The present invention relates to a spread spectrum (spread spectrum) time division duplex communication (time division duplex; TDD) system. More particularly, the present invention relates to a method and system for controlling outer loop transmission power in a TDD communication system. Background technique [0002] Spread spectrum TDD systems carry multiple communications on the same frequency spectrum. The multiple signals are distinguished by their individual chip code (code) sequences. refer to figure 1 , TDD system use is divided into several time slots (time slot)37 1 A repeated frame 34 of -37n, eg 15 time slots. In such a system, communications use selected codes from multiple time slots 37 1 -37n is transmitted in a selected time slot. Thus, frame 34 is capable of carrying multiple communications distinguished by both time slots and codes. The combination of a single code in a single time slot is called a physical channel. Based on th...

Claims

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Application Information

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IPC IPC(8): H04B7/005H04B7/26H04J13/00H04W52/12
CPCH04W52/146H04W52/12H04W52/24H04W52/225H04W52/228H04W52/08H04W52/143
Inventor 章修·谷艾利拉·莱尔唐纳德·格里库颂佑·辛
Owner INTERDIGITAL TECH CORP
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