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Optimum allocation method of downlink primary scrambling code in wideband code division multiple access system

A wideband code division multiple access and downlink primary scrambling technology, which is applied in the direction of multiplexing code allocation, etc., can solve the problems of increasing cell interference, errors, and not considering the allocation of scrambling code groups in adjacent cells, etc., and achieves scrambling code utilization. High, low-interference effect

Inactive Publication Date: 2011-11-30
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the distribution of adjacent cell scrambling code groups is not considered: when the scrambling codes of adjacent cells are in the same scrambling code group, the two cells will use the same secondary synchronization code in the secondary synchronization channel, which will increase the interference between cells. Cause UE to make an error when searching for the downlink primary scrambling code of the cell

Method used

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  • Optimum allocation method of downlink primary scrambling code in wideband code division multiple access system
  • Optimum allocation method of downlink primary scrambling code in wideband code division multiple access system
  • Optimum allocation method of downlink primary scrambling code in wideband code division multiple access system

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Experimental program
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Embodiment Construction

[0022] figure 1 It is a flowchart of a specific embodiment of the present invention.

[0023] figure 1 The content in has been described in the technical proposal. The scrambling code multiplexing rule is: when the number of adjacent cells of any cell is less than or equal to the number of downlink main scrambling codes that can be allocated, the downlink main scrambling code is allocated, and different downlink main scrambling codes are allocated to adjacent cells. The downlink primary scrambling codes in the code group or different downlink primary scrambling codes in the same downlink primary scrambling code group are assigned the same or different downlink primary scrambling codes to non-adjacent cells; When the number of cells is greater than the number of downlink primary scrambling codes that can be allocated, the downlink primary scrambling codes are not allocated to the cell.

[0024] The specific operation method is introduced below.

[0025] Assume that there ar...

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Abstract

This invention relates to wide band multiple address system down host interference optimization method, wherein, when any small area adjacent number is less than or equal to down interference codes number, processing down host interference codes matching and the matching rules are as following: for adjacent area matching different down host interference sets or same down interference codes set ; when one small adjacent area number is larger than down interference code number, then not matching main interference codes on the area.

Description

technical field [0001] The invention relates to wideband code division multiple access (WCDMA) mobile communication technology, in particular to a method for distributing downlink main scrambling codes in the WCDMA system. Background technique [0002] Wideband-CDMA system is a wireless communication system based on CDMA technology. In a WCDMA system, the number of downlink scrambling codes is 2 18 -1=262143, among which there are 24576 downlink scrambling codes used, number k=0, . . . , 24575. The 24576 scrambling codes are divided into three parts: [0003] k=0, 1, 2,...8191 corresponds to 8192 common scrambling codes, which are used in normal mode; k+8192, k=0, 1, 2,...8191 is in compressed mode when n<SF / 2 The alternative scrambling code used is called the left auxiliary scrambling code; k+16384, k=0, 1, 2, ... 8191 is the alternative scrambling code used when n≥SF / 2 in compressed mode, called is the right auxiliary scrambling code; wherein: n is the corresponding...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/16
Inventor 黄河
Owner ZTE CORP