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Method and apparatus for selecting combined-inspection homogeneous frequency adjacent area

A technology of joint detection and adjacent cells, applied in the field of communication, can solve the problem of unguaranteed system performance, achieve the effect of improving the effect and avoid the situation of missed detection

Active Publication Date: 2010-05-12
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the existing extended joint detection method can only randomly or fixedly select the cells to be detected, it is likely to cause missed detection of cells with strong interference, so that the system performance cannot be guaranteed

Method used

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  • Method and apparatus for selecting combined-inspection homogeneous frequency adjacent area
  • Method and apparatus for selecting combined-inspection homogeneous frequency adjacent area
  • Method and apparatus for selecting combined-inspection homogeneous frequency adjacent area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] Assume that each base station can perform joint detection on up to 5 cells per time slot, that is, subtract the own cell to get 4; each time reserve 2 neighboring cells with the strongest power for participating in the next joint detection.

[0101] Namely: N=6, L=4, M=2.

[0102] In this channel estimation and joint detection, select I=5 cells (including this cell) for multi-code set channel estimation and multi-cell joint detection, and record the identification IDs of M=2 adjacent cells with the strongest power . The number of cells that did not participate in multi-code set channel estimation and multi-cell joint detection this time is N-L=6-4=2, which is exactly equal to the adjacent cell L selected this time except for the adjacent cell with the strongest power recorded this time M, that is, (L-M) all can be included in the adjacent cell range of the next detection, that is, N-L=L-M=2 cells, which is equivalent to the branch of N-L=L-M in the above step 6.

[01...

Embodiment 2

[0105] Assume that each base station can perform joint detection on up to 5 cells per time slot, that is, subtract the own cell to get 4; each time reserve 3 neighboring cells with the strongest power for participating in the next joint detection.

[0106] Namely: N=6, L=4, M=3.

[0107] In this channel estimation and joint detection, select I=5 cells (including this cell) for multi-code set channel estimation and multi-cell joint detection, and record the identification IDs of M=3 neighboring cells with the strongest power . The number of cells that did not participate in multi-code set channel estimation and multi-cell joint detection this time is N-L=6-4=2, which is just larger than the adjacent cell L selected this time except for the adjacent cell with the strongest power recorded this time M, that is, it is possible to randomly select (L-M=1) adjacent cells from the unselected (N-L=2) this time to be included in the adjacent cell range of the next detection, that is: I=...

Embodiment 3

[0110] Assume that each base station can perform joint detection on up to 5 cells per time slot, that is, subtract the own cell to get 4; each time reserve 1 adjacent cell with the strongest power for participating in the next joint detection.

[0111] Namely: N=6, L=4, M=1.

[0112] In this channel estimation and joint detection, select I=5 cells (including this cell) for multi-code set channel estimation and multi-cell joint detection, and record the identification IDs of M=1 neighboring cells with the strongest power . The number of cells that did not participate in multi-code set channel estimation and multi-cell joint detection this time is N-L=6-4=2, which is just smaller than the adjacent cell L selected this time except for the adjacent cell with the strongest power recorded this time M, that is, it is not enough to select all the unselected (N-L=2) this time, and it is necessary to further randomly select [(L-M)-( N-L)=1] are included in the adjacent sub-district sc...

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Abstract

The method comprises: selecting a cell set L from all neighboring cell set N; the cell set L and current cell are used as the cell set I which is currently detected; making multi code set channel estimation for the currently-detected cell set I, and making multi cell joint detection for it; calculating the power of cell set L, and ordering the power; selecting cell set M with higher power; the cell set M and the current cell are used as the first part I1 of cell set I' which will be detected at next time; selecting the cell from the neighboring cells outside of the cell set M, which is used asthe second part I2 of the cell set I' that will be detected at next time.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for optimal selection of co-frequency adjacent cells for joint detection. Background technique [0002] The existing Time-Division Synchronization Code Division-Multiple-Access (TD-SCDMA, Time-Division Synchronization Code Division-Multiple-Access) system is suitable for joint detection to eliminate multiple access interference in the cell, but the anti-interference ability of the system will be limited. For this reason, an improved method is adopted in the prior art to improve the performance of the system when each cell works at the same frequency. [0003] The commonly used improvement method is to carry out extended joint detection at the base station, and include the interference signals of adjacent cells into the joint detection range, so as to eliminate the interference of adjacent cells, thereby improving the detection performance of signals. The spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26
Inventor 王映民任世岩
Owner DATANG MOBILE COMM EQUIP CO LTD