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Uplink external ring power control method in high speed uplink link group access application

A high-speed uplink, outer-loop power control technology, applied in the field of WCDMA systems, can solve the problems of adjusting the transmit power, unable to effectively track the change of channel conditions, etc., to achieve the effect of utilizing power resources and improving cell capacity

Inactive Publication Date: 2007-10-03
ZTE CORP
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Problems solved by technology

[0004] However, in HSUPA applications, NODEB cannot report channel quality response parameters such as block error indication (CRCI) and SIRerror of each data block like R99. It can only send HARQ (hybrid automatic repeater) to RNC through the uplink data frame of the user plane. Send request) or NHR (Number of HARQRetransmissions, number of retransmissions), etc. In this way, in HSUPA applications, the outer loop power control can only be adjusted according to these two parameters, and it cannot effectively track changes in channel conditions so as to adjust the transmission power in time

Method used

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  • Uplink external ring power control method in high speed uplink link group access application

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[0028] Due to the characteristics of the service itself, for some I / B services, the real-time performance is not too strong, so the retransmission mechanism can be fully utilized to reduce the transmission power and save wireless resources. Therefore, NHR is used for outer loop power control for such services basis is more reasonable. For services sensitive to delay such as VOIP or S, there may be no retransmission opportunities or very few opportunities. Therefore, for such services, it is more reasonable to use HARQ failure indication to guide outer loop power control.

[0029] In order to enable RNC to dynamically adjust the uplink SIRTarget (signal-to-interference ratio target value) according to the change of E-DCH channel quality, 25.427 of the 3GPP protocol defines the process of NODEB sending HARQ failure indication and bringing back the number of retransmissions in the uplink data frame. The serving Node B sends a HARQ failure indication to the RNC in the following si...

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Abstract

This invention discloses an up-line outer-ring power control method in the application of high speed up-link packet access including the following processes: A, calculating indication numbers of faulty automatic re-issuing request reported by user side in a set statistic time window at the beginning of accessing loaded services by the high speed up-link packets, B, setting parameters adjusted up and down and comparing the statistic result of the indication number of the faulty request with the parameters to sort the channel quality into three levels: poor, acceptable and very good, C, adjusting the S / I ratio target value according to the channel quality in terms of set adjustment principle and its adjust volume, D, informing the target value of the S / I ratio to a base station to finish outer ring power control.

Description

technical field [0001] The present invention relates to a WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access) system, in particular to an uplink outer loop power control method in an HSUPA (High Speed ​​Uplink Packet Access) application. Background technique [0002] As 3G (third generation mobile communication) technology gradually moves toward the market, more and more users begin to use the services provided by 3G technology. The growth of these services, especially the continuous increase in the number of interactive services requires improvement of uplink usage capacity. The original R99 and R4 systems of WCDMA can only provide the highest uplink and downlink rates of 64kbps and 384kbps respectively. In order to improve the uplink usage capacity, WCDMA introduces HSUPA to meet this demand. [0003] The goal of HSUPA is to improve capacity and data throughput in the uplink direction and reduce delay in dedicated channels. The main enh...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04Q7/22H04B1/707H04W52/12H04W52/14
Inventor 徐江
Owner ZTE CORP
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