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Channelizing code resource dynamic optimization distribution method of wideband CDMA system

A technology of wideband code division multiple access and channelization codes, which is applied in the field of dynamic allocation of downlink orthogonal channelization code resources in wideband code division multiple access mobile communication systems, can solve the problem of disconnection between theory and practical application, and can not be widely used in practice. Application, high computational complexity and other issues, to achieve the effect of optimizing allocation, ensuring compactness, and reducing the amount of calculation

Inactive Publication Date: 2006-02-08
ZTE CORP
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Problems solved by technology

[0009] The purpose of the present invention is to overcome the disadvantages of high computational complexity, parameter uncertainty and inability to be widely used in the prior art based on the cost function method, as well as the disconnection between theory and practical application.

Method used

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  • Channelizing code resource dynamic optimization distribution method of wideband CDMA system
  • Channelizing code resource dynamic optimization distribution method of wideband CDMA system
  • Channelizing code resource dynamic optimization distribution method of wideband CDMA system

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Embodiment Construction

[0042] In WCDMA, orthogonal channelization codes are used in the row direction to distinguish physical channels, and scrambling codes are used to distinguish users in the uplink direction. However, since a cell has only one orthogonal channelization code table (the structure of the orthogonal channelization code tree is shown in the attached figure 1 shown), the smaller the spreading factor, the fewer the number of orthogonal channelization codes; the code word on the code tree corresponding to the small spreading factor is a high-speed spreading code, and the code word on the code tree corresponding to the large spreading factor is a low-speed spreading code. Moreover, the orthogonal channelization code has the following characteristics: (1) only codewords whose parent node codewords and any node codewords on its subtree have not been allocated can be allocated; (2) codewords are allocated In the future, all low-speed spreading codes on its subtree and high-speed spreading ...

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Abstract

A dynamic optimized distribution method for channelized code resource in a broadband code-division multiaddress system incldues such steps as follows: 1) obtaining a matched spread spectrum factor and using it as parameter; 2) judging whether there is a distributable code resource on the code tree layer corvesponded to the said matched spread spectrum factor or not; if not, switching to step 6); 3) carrying on optimized distribution of code resource through the pseudo-metric distribution method, returning to numbering of distribution code word; 4) judging whether the returned numbering belongs to code resource numbering of the code tree layer corresponded to the spread spectrum factor ot not; if not, switching to step 7); 5) returning to command of distribution success, and finishing 6) returning to command of code source having been finished for distribution, and finishing.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for dynamic allocation of downlink orthogonal channelization code resources in a wideband code division multiple access (WCDMA) mobile communication system. Background technique [0002] Mobile communication has experienced the development of the first generation of analog mobile communication, the second generation of digital mobile communication (GSM) and narrowband CDMA communication technology, and has now developed to the third generation of mobile communication using wideband code division multiple access (WCDMA) technology. system. The WCDMA communication system adopts the working method of code division. After the physical channel is framed, it needs to perform spread spectrum and scrambling operations. Spread spectrum is to multiply a high-speed digital sequence with a digital signal to convert the data symbols into a series of chips. , increase the rate of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J13/00H04Q7/20H04B1/00H04W72/04
Inventor 柯雅珠窦建武鲁翌晖黄胜华李春艳郑涛
Owner ZTE CORP
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