Method for dynamic channel allocation in TD-SCDMA system

A TD-SCDMA, dynamic channel allocation technology, applied in wireless communication, electrical components, network planning and other directions, can solve problems such as cross-slots

Active Publication Date: 2009-03-18
BEIJING UNIV OF POSTS & TELECOMM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inconsistency of the service types of each cell may lead to the generation of cross slots

Method used

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  • Method for dynamic channel allocation in TD-SCDMA system
  • Method for dynamic channel allocation in TD-SCDMA system
  • Method for dynamic channel allocation in TD-SCDMA system

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Experimental program
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Embodiment Construction

[0015] The method for dynamic channel allocation in time division-synchronous code division multiple access (TD-SCDMA) system of the present invention comprises the following steps:

[0016] (1) According to the channel conditions required by the uplink and downlink services of each cell, the allocation of the uplink and downlink time slots of each cell is adjusted.

[0017] Assume that the number of time slots occupied by the uplink and downlink in the TD-SCDMA system are N respectively u , N d , gamma u and gamma d Respectively represent the average traffic volume of uplink and downlink in a period of time. If the slot allocation satisfies γ u / γ d =N u / N d The system is considered to be balanced. if|γ u / γ d -N u / N d |≥δ, it is considered that the uplink and downlink time slots must be reassigned, where the positive number δ is the threshold used to determine that the time slot allocation can meet the load requirements.

[0018] After the uplink and downlink ...

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Abstract

This invention discloses a dynamic channel distribution method in the TD-SCDMA system with multiple local areas, including the following steps: 1, regulating the distribution of up and down time slots of each local area according to channels necessary for each area up and down services, 2, distributing mobile stations with the preset distance shorter than that to the base station in each local area to the code channel of cross slot till finishing the distribution of the code channels of all cross slots, 3, distributing different slots to the mobile stations in cross regions of adjacent regions.

Description

technical field [0001] The invention relates to the technical field of code division multiple access (CDMA) mobile communication, in particular to a method for dynamic channel allocation in a time division-synchronous code division multiple access (TD-SCDMA) system. Background technique [0002] In the TD-SCDMA system based on CDMA mode, since adjacent cells can use the same frequency, the dynamic channel allocation method based on frequency reuse distance is no longer applicable, and the dynamic channel allocation method based on interference measurement is generally used. In the TDD mode, there are multiple time slot channels, which can flexibly allocate uplink and downlink time slot resources and dynamically adjust the number of uplink and downlink time slots, thereby flexibly supporting symmetric and asymmetric services. The inconsistency of the business types of each cell may lead to the generation of cross slots. A cross time slot means that a cell in this time slot i...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H04W16/10H04W72/04
Inventor张平李继龙姜军吴晓光王冰
OwnerBEIJING UNIV OF POSTS & TELECOMM