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Research and Realization on Soft Handoff Arithmetic in CDMA System

Author: ZouZhiJun
Tutor: JiXinSheng
School: PLA Information Engineering University
Course: Communication and Information System
Keywords: Code Division Multiple Access Multi-service Soft handover Algorithm Quality of service
CLC: TN929.533
Type: Master's thesis
Year: 2009
Downloads: 40
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Abstract


Soft switching technology is one of the key technologies in the CDMA system , it plays an important role in terms of radio resource control and optimization of the system . Wherein the soft handoff algorithm design directly affects the system capacity and quality of service . The existing CDMA soft handover algorithm based on three improved soft handoff algorithm , and according to the need of the composite mobile communication system , designed to achieve soft switching module . In this paper, research and innovation : a traditional soft - switching algorithm does not consider the balance between business factors in the cell , this paper, in the cdma2000 soft handover algorithm based on the introduction of an adaptive parameter T , a fuzzy adaptive soft handover algorithm parameters . The volume of business in a more effective balance between cells through study and simulation results show that : the algorithm can improve the utilization of system resources to perform well . Integrated multi-service cellular systems for real-time services and non - real business , this paper, based on the channel reservation , to seize the priority and queuing combined switching strategy . Simulation results show that : the strategy in the case of non-real-time quality of service by a smaller impact , real - time traffic blocking rate , real-time business trap the probability of system performance has been significantly improved , providing a better quality of service . (3) In order to fully guarantee the communication quality of the high-priority switching business , This paper presents a multi-service switching strategy based on fuzzy channel reserved for the policy based on fuzzy adaptive channel switch request to the high-priority call service set aside . The analysis results show that : the switching strategy can provide better system quality of service . (4) Design and Implementation of a complex communication system soft - switching module , soft handover algorithm is applied based on fuzzy adaptive parameters in the system , and soft - switching module test results show that the module is able to meet the system's functionality and performance requirements, and effectively improve the utilization of system resources .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications > Cellular mobile communications systems (mobile phones, mobile phone handsets ) > Code Division Multiple Access (CDMA) mobile communication
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