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Method for measuring cofrequency multi-district observation time difference

A measurement method and multi-cell technology, applied in the field of TD-SCDMA communication, can solve problems such as poor results and inability to meet performance requirements

Inactive Publication Date: 2009-05-27
MEDIATEK INC
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  • Summary
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AI Technical Summary

Problems solved by technology

However, in the same-frequency networking environment, especially when the UE is at the border of multiple adjacent cells, the interference signals from multiple cells at the same time will cause poor results of the general OTD measurement method, which cannot meet the performance requirements. needs

Method used

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  • Method for measuring cofrequency multi-district observation time difference
  • Method for measuring cofrequency multi-district observation time difference
  • Method for measuring cofrequency multi-district observation time difference

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Embodiment Construction

[0054] Such as figure 2 The present invention shown comprises 6 steps of implementation process, and its concrete steps are as follows:

[0055] Suppose there are N c cells (including this cell), the downlink pilot sequence corresponding to each cell is si , i=1, 2,...N c In other words, first press the formula:

[0056] s ‾ = s ‾ ( 1 ) = s * ( 1 ) s ‾ ( i ) = ...

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Abstract

A measuring method for observation time difference of same frequency and multiple cells is characterized in that observation time difference of every adjacent cell is acquired by calculating channel impact response of every cell, channel impact response peak position of every cell and OTD average value of every adjacent cell by utilizing received DwPTS information from local cell, SYNC-DL code configuration information of adjacent cell acquired by broadcasting information of local cell, single cell channel estimation, effective path judgement threshold calculation, SUC ranking, SUC calculation, especially when UE is positioned at border of multi-adjacent cells, UE accurately measures the observation time difference for multi-cells of same frequency. The invention solves problem that traditional measurement has bad result which can not satisfy demand of performance, and provides technical support for widely generalization of third generation TD-SCDMA communication system.

Description

technical field [0001] The invention relates to a TD-SCDMA communication technology, in particular to a method for accurately measuring the observed time difference (OTD) of multiple cells. Background technique [0002] In the TD-SCDMA communication system, the terminal equipment (UE) needs to perform adjacent cell measurement in order to find a serving cell with better communication quality. A main content of the measurement is the adjacent cell system frame number (SFN-SFN ) observation time difference (OTD) information. The UE can independently estimate each neighboring cell based on the midamble code or downlink pilot time slot (DwPTS) information of the 0th time slot (TSO), and perform OTD measurement based on the received midamble code part , the supportable inter-cell deviation range is small, so usually, the UE performs separate OTD measurement for each cell based on the downlink DwPTS information. [0003] Such as figure 1 The time slot structure of the downlink ...

Claims

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Application Information

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IPC IPC(8): H04W24/08
Inventor 孙飞雪
Owner MEDIATEK INC
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