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Scrambling code distribution method for CDMA system

A technology of code division multiple access and code allocation, which is applied in the field of scrambling code allocation in code division multiple access systems, can solve the problems that the scrambling code allocation method is not optimal and cannot effectively guarantee co-channel interference, etc., and achieve optimal scrambling code allocation , the effect of reducing complexity

Inactive Publication Date: 2007-10-31
CHINA ACAD OF TELECOMM TECH
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Problems solved by technology

However, the methods provided by the above two patents allocate scrambling codes under the assumption that the interference levels between the cells are exactly the same, but in the actual communication system, the mutual interference between the cells may be caused by factors such as terrain and topography. There are differences in interference levels. Therefore, the above method cannot effectively guarantee the minimum intra-system co-channel interference in co-frequency networking in CDMA systems. Therefore, the above two scrambling code allocation methods are not optimal.

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  • Scrambling code distribution method for CDMA system
  • Scrambling code distribution method for CDMA system
  • Scrambling code distribution method for CDMA system

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[0026] Below we will describe in detail the best implementation of the present invention with reference to the accompanying drawings. First of all, it should be pointed out that the meanings of the terms, words and claims used in the present invention should not be limited to their literal and ordinary meanings, but also include meanings and concepts that are consistent with the technology of the present invention. This is because It is up to us, as inventors, to define terms appropriately in order to best describe our inventions. Therefore, the configurations given in this specification and the accompanying drawings are only preferred implementations of the present invention, rather than enumerating all technical characteristics of the present invention. We need to recognize that there are various equivalents or modifications that could replace ours.

[0027] First, the first embodiment of the present invention will be described with reference to FIG. 2 .

[0028] In step S...

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Abstract

The invention provides an interference code distributing method for the code multi-address system which includes: distributing interference code for the section with the highest interference level; and determining to distribute the interference code for the undistributed section whether or not, by judging if distributing the interference code for all sections in the code multi-address system, till all sections are distributed the interference codes. Because the method provided by the invention considers about the difference of interference level between the sections, the result of method in the invention is better than the interference code method which not considers the interference level in the communication system.

Description

technical field [0001] The invention relates to mobile communication technology, in particular to a method for allocating scrambling codes in a code division multiple access system. Background technique [0002] The third-generation mobile communication system widely adopts the multiple access method based on the code division multiple access system (CDMA). Its basic feature is to distinguish different users with different code words. , users in the cell are distinguished by Orthogonal Variable Length Spread Spectrum (OVSF). In an actual mobile communication system, it is an important step in the network planning process of a CDMA system to assign a scrambling code to each cell that constitutes an actual cellular network. An optimized scrambling code allocation method can greatly reduce the occurrence of abnormal call drop and unnecessary signaling interaction control process, so the effect of scrambling code allocation directly affects the overall performance of the wirele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/216H04J13/00H04J13/16
Inventor 翟海涛冯心睿
Owner CHINA ACAD OF TELECOMM TECH
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