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(A) Mathematical Analysis of Asymmetrical Traffic in TD-CDMA Systems

  • 저자

    신정채

  • 학위수여기관

    慶北大學校 大學院

  • 학위구분

    국내석사

  • 학과

    정보통신학과

  • 지도교수

  • 발행년도

    2004

  • 총페이지

    iii, 45p.

  • 키워드

    시분할 코드분할 다중 접속 시스템;

  • 언어

    kor

  • 원문 URL

    http://www.riss.kr/link?id=T10046685&outLink=K  

  • 초록

    This thesis proposes a mathematical model to analyze call- and packet-level performance of the TD-CDMA/TDD system which could serve a flexible radio resource management against multi-type heterogeneous and asymmetrical traffic conditions. On call-level analysis, the mathematical model based on queueing theory performs multi-dimensional operations using random vectors or matrices to consider multiple types of traffic and also deal with asymmetrical up- and down-direction transmissions separately. Employing the mathematical model, we obtain call blocking probability for each type of traffic and also the optimum switching-point with the smallest call blocking probability. And on packet-level analysis, employing a non-prioritized queueing scheme between circuit and packet calls, we solve 2-dimensional random vector problem composed of the queue length for packets and the number of circuit calls being served. Finally, packet-level performance is analyzed in terms of the packet loss probability and the buffer size required under mixed-traffic conditions of multiple types of circuit and packet calls.


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