Unlock instant, AI-driven research and patent intelligence for your innovation.

Power control method of upstream control channel in soft switching state in high speed access system

A technology for controlling channels and access systems, applied in power management, transmission control/equalization, wireless communication and other directions, can solve the problems of increasing other code channel interference, waste of ACK/NACK information transmission power, etc., and achieve transmission power saving, Save the transmission power, the effect is obvious

Inactive Publication Date: 2003-08-20
HUAWEI TECH CO LTD
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the existing power control method of the uplink control channel, in order to ensure that ACK / NACK can be received correctly at all positions of the mobile station in the cell, the power offset Poffset must be set according to the maximum situation, which is bound to be in some cases The transmission power of ACK / NACK information is wasted, and unnecessary interference to other code channels is also increased.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Power control method of upstream control channel in soft switching state in high speed access system
  • Power control method of upstream control channel in soft switching state in high speed access system
  • Power control method of upstream control channel in soft switching state in high speed access system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] figure 1 It is an embodiment flowchart of the method of the present invention. according to figure 1 , the present invention first sets the power offset increment counter N in the base station and the mobile station respectively up and power bias decrement counter N down , used to record the change of bias power required by ACK / NACK when the mobile station is in the soft handover area, and set the transmission power adjustment step ΔP of the automatic repeat request response message (ACK or NACK), so as to adjust the bias power Power is adjusted. In order to facilitate the description of the present invention, the following parameter quantities are defined, and it is assumed that these parameter quantities have been normalized by noise power.

[0024] P P m , R99 uplink DPCCH pilot power measurement value;

[0025] P A t , ACK...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A method of power control at soft switching state for up-going control channel of high speed entering system records down with the variation of offset power required by ACK / NACk at the time when the mobile station is at the area of soft switching through power offset decrement and increment counter set separately in base station and mobile station and also through comparing the actual power Par of ACK or NACK with the size of target power PAt by the base station. The said variation will be transmitted to the mobile station to make the mobile station adjust the offset value of emission power as per the variation so the actual power will be made always the most near with the target power.

Description

technical field [0001] The invention relates to a power control method in a high-speed packet access system, in particular to a power control method for an uplink control channel of the high-speed packet access system. Background technique [0002] The uplink control channel of the High Speed ​​Downlink Packet Access (HSDPA) system contains two parts of information, one part is the hybrid automatic repeat request acknowledgment (ACK / NACK) fed back from the mobile station to the base station, which is used to indicate whether the mobile station has correctly received the information sent by the base station. The other part is the downlink channel quality indication information (CQI), which is used to describe the quality indication of the downlink channel. Since the CQI information is reported periodically, the system has no requirement on the bit error of the CQI information. The ACK / NACK information error code will directly cause the base station to make a wrong judgment o...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/14H04B7/005H04W52/24H04W52/48
Inventor 吴迪魏岳军
Owner HUAWEI TECH CO LTD