The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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AHP and Group Decision Making for Access Network Selection in Heterogeneous Wireless Networks

이기종 무선 네트워크에서 접근 네트워크 선택을 위한 AHP와 그룹 결정 방법

  • 김남선 (대진대학교 통신공학과)
  • Received : 2013.06.03
  • Accepted : 2013.10.14
  • Published : 2013.10.31
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Abstract

In the 4G wireless environment, one of the important issues is to discover and select an access network suited for users. In this thesis, we propose a new network selection mechanism using group decision making and evaluate the effect of network selection schemes for vertical handover in heterogeneous wireless networks. We consider the group of users with similar QoS requirements search for the available access network simultaneously and a service area consist of multiple access networks with various characteristics. We divide the access networks with similar characteristics split into a group. Between each group, the one group is selected and within that group, the best access networks will be assigned according to priority order by network selection algorithm. We evaluate and compare the performance of three representative MADM schemes: GRA, SAW and TOPSIS. The MATLAB simulation results indicate the proposed algorithm can make a more effective choice according to the networks' characteristics and user's preference.

4세대 무선통신 환경에서, 가장 중요한 문제 중의 하나는 사용자들에게 적합한 접근 네트워크를 발견하고 선택하는 것이다. 본 논문에서는 그룹결정기법을 이용한 새로운 네트워크 선택 메커니즘을 제안하고, 이종 네트워크 환경에서 수직 핸드오버를 위한 네트워크 선택 기법에 따른 영향을 분석한다. 비슷한 QoS 요구조건들을 갖는 사용자들의 그룹들이 동시에 이용할 수 있는 네트워크를 탐색하며, 한 서비스 영역은 여러 특성을 갖는 다수의 접근 네트워크들이 존재하는 경우를 고려한다. 비슷한 특성을 갖는 네트워크들을 그룹으로 묶어, 일차적으로 그룹간의 판별을 통해 적합한 그룹을 선택한 후, 그 그룹에서 네트워크 선택 알고리즘에 의한 네트워크 순위를 통해 최적의 네트워크를 선택해 준다. 제안된 시스템을 MADM 기법 중 GRA, SAW 그리고 TOPSIS 방법으로 비교 및 평가하였다. MATLAB 시뮬레이션 결과, 제안된 알고리즘은 네트워크들의 특성과 사용자의 선호도에 따라 더욱 효과적인 선택을 할 수 있음을 알 수 있다.

Keywords

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