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Method for controlling block error ratio in mobile communication system

A mobile communication, block error rate technology, applied in transmission systems, digital transmission systems, data switching networks, etc., can solve the problems of cell throughput decline, HS-DSCH channel block error rate deviation, change, etc., to improve throughput , to ensure the accuracy and real-time effect

Inactive Publication Date: 2007-12-26
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0002] In the high-speed downlink packet access system (HSDPA), the terminal (UE) reports the channel quality indicator (CQI) according to the channel block error rate (BLER) of the high-speed downlink shared channel (HS-DSCH) in the current wireless environment is less than 10%. Yes, but due to the error when the UE reports the CQI or the rapid change of the channel, the channel between the reporting time and the actual sending time changes significantly, resulting in a deviation of 10% from the HS-DSCH channel block error rate (BLER)
If the block error rate is too low, the transmitted data blocks are small, and UE throughput cannot be maximized; and when the block error rate is too high, the throughput of the terminal will decrease, and at the same time, the scheduling efficiency of Node B will decrease due to the high block error rate resulting in a drop in cell throughput
However, in the prior art, there is no effective measure in the HSDPA system to control the block error rate of the UE within a certain range, so as to maximize the throughput of the UE and the cell

Method used

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  • Method for controlling block error ratio in mobile communication system
  • Method for controlling block error ratio in mobile communication system
  • Method for controlling block error ratio in mobile communication system

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] The method for controlling the block error rate in the mobile communication system proposed by the present invention is shown in Figure 1, including:

[0031] 1. Set the statistical number counter, statistical timer, block error rate register, and adjustment value register, wherein the maximum value of the statistical number counter is set to M, and the maximum value of the statistical timer is N; M and N are used to ensure the accuracy of BLER statistics and real-time performance, M must be large enough to ensure accuracy; at the same time, N must not be too large to ensure real-time performance; when the number of users is certain, M and N are mutually restrictive; the values ​​of M and N should be considered comprehensively , carry out a compromise selection; at the same time, set an initial adjustment value and the corresponding relationship table of the bit...

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Abstract

The invention is used for solving the issue that is the currently-used technology can't control the block-missing rate so as to cause low throughout. It comprises: setting up a corresponding table between the initial adjustment value and the block-missing rate, and calculating the block-missing rate at unit time and at a certain times; if the block-missing rate is more than an upper threshold and less than a threshold, then according to the block-missing rate, the code rate is adjusted. By setting up a frequency counter and a timer, the invention ensures the accuracy and real-time statistic of block-missing rate. The invention is mainly used in high speed downlink packet access (HSDPA) system.

Description

technical field [0001] The invention relates to a method for controlling the block error rate in the field of wireless mobile communication, in particular to a method for controlling the block error rate in a high-speed downlink packet access system. Background technique [0002] In the high-speed downlink packet access system (HSDPA), the terminal (UE) reports the channel quality indicator (CQI) according to the channel block error rate (BLER) of the high-speed downlink shared channel (HS-DSCH) in the current wireless environment is less than 10%. However, due to the error when the UE reports the CQI or the rapid change of the channel, the channel between the reporting time and the actual sending time changes significantly, resulting in a deviation of 10% in the HS-DSCH channel block error rate (BLER). If the block error rate is too low, the transmitted data blocks are small, and UE throughput cannot be maximized; and when the block error rate is too high, the throughput of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04L1/00
Inventor 刘涛
Owner ZTE CORP
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