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An external loop power control method of uplink enhanced channel

A technology of outer-loop power control and enhanced dedicated channel, which is applied in the field of communication, can solve the problems that cannot reflect the change of E-DCH channel quality and the slowness of outer-loop power control, so as to improve system capacity, reduce uplink transmission power, and ensure business quality effect

Inactive Publication Date: 2009-11-18
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method of outer loop power control for the enhanced uplink dedicated channel in the WCDMA system, to solve the problem that the outer loop power control of the DCH will It is very slow and cannot reflect the technical problem of the quality change of the E-DCH channel

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  • An external loop power control method of uplink enhanced channel
  • An external loop power control method of uplink enhanced channel
  • An external loop power control method of uplink enhanced channel

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Embodiment Construction

[0055] The technical solution of the present invention will be further described below in conjunction with specific procedures.

[0056] The schematic diagram of the outer loop power control based on E-DCH channel quality described in the present invention is as attached image 3 Shown, specifically include the following:

[0057] 1) Set the retransmission times threshold for E-DCH power reduction. Set the E-DCH and DCH power down-regulation flags to "no down-regulation" respectively.

[0058] 2) The RNC counts the number of E-DCH HARQ retransmissions according to the number of retransmissions carried in the E-DCH data frame reported by the Node B. If the number of retransmissions is less than the retransmission threshold for E-DCH power reduction, set the E-DCH reduction flag to "Down", and go to step 4. Otherwise, set the E-DCH downregulation flag to "no downregulation".

[0059] 3) If it is decided to lower the DCH power for the outer loop power control of the DCH, set ...

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Abstract

The invention discloses a method for controlling the outer loop power of an uplink enhanced channel, which is characterized in that, in combination with the constraint relationship between the outer loop power control of the dedicated channel and the enhanced dedicated channel, the power of the dedicated channel and the enhanced dedicated channel is used The target signal-to-interference power ratio of the uplink outer-loop power control is adjusted by changing the transmission quality, so that the outer-loop power control is performed in time by using the enhanced dedicated channel. The invention solves the technical problem in the prior art that when the dedicated channel has no data or the amount of data is small, the outer loop power control of the dedicated channel will be very slow and cannot reflect the quality change of the enhanced dedicated channel, and can realize the uplink enhanced channel. The outer loop power control ensures the service quality on the uplink enhanced channel, and reduces the uplink transmission power as much as possible to improve the system capacity.

Description

technical field [0001] The invention relates to the communication field, in particular to an outer loop power control method of an uplink enhanced channel in a WCDMA communication system. Background technique [0002] In a WCDMA communication system, in order to overcome the fading of wireless signals and ensure a certain quality of service, closed-loop power control must be performed. The closed loop power control in WCDMA system is divided into two parts: inner loop power control and outer loop power control. Inner loop power control is carried out in each time slot of the physical channel, which is a fast power control process. The outer loop power control is to set the quality target of the inner loop power control according to the actual transmission quality, which is a slow power control process. Taking the power control in the uplink direction as an example, the closed-loop power control process in the WCDMA system is briefly introduced below. [0003] The uplink i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/005
Inventor 黄明徐江
Owner ZTE CORP