Wireless Local Area Networks (WLANs) are becoming a popular way of networking computer equipments in the home and office. In order to support differentiated Quality-of- Service (QoS) in WLANs, the IEEE 802.11e Enhanced Distributed Channel Access (EDCA) protocol allocates multiple Access Categories (ACs) with different priorities, inter-frame spaces, and contention window sizes. This paper presents an improved Medium Access Control (MAC) scheme to enhance the QoS of WLANs based on the idea of using the different increasing functions for each AC to enlarge the size of contention window in the case of transmission collision. The performance of this improved scheme under multimedia applications is extensively investigated and compared with the original EDCA using the wellknown network simulator NS-2. The results show that this scheme is able to achieve higher throughput and medium utilization as well as lower access delay and packet loss probability than the original EDCA. Moreover, it provides a good prioritization level between multiple ACs.
목차
Abstract 1. Introduction 2. Existing Medium Access Control (MAC) Schemes 2.1 Distributed Coordination Function (DCF) 2.2 Enhanced Distributed Channel Access (EDCA) 3. The Improved MAC Scheme 4. Performance Evaluation and Comparison 4.1 Simulation Scenarios 4.2 Heterogeneous Traffic Models 4.3 Performance Results 5. Conclusions 6. References
저자
Geyong Min [ Department of Computing, School of Informatics, University of Bradford, Bradford, BD7 1DP, U.K. ]
Mamun I. Abu-Tair [ Department of Computing, School of Informatics, University of Bradford, Bradford, BD7 1DP, U.K. ]
보안공학연구지원센터(IJSH) [Science & Engineering Research Support Center, Republic of Korea(IJSH)]
설립연도
2006
분야
공학>컴퓨터학
소개
1. 보안공학에 대한 각종 조사 및 연구
2. 보안공학에 대한 응용기술 연구 및 발표
3. 보안공학에 관한 각종 학술 발표회 및 전시회 개최
4. 보안공학 기술의 상호 협조 및 정보교환
5. 보안공학에 관한 표준화 사업 및 규격의 제정
6. 보안공학에 관한 산학연 협동의 증진
7. 국제적 학술 교류 및 기술 협력
8. 보안공학에 관한 논문지 발간
9. 기타 본 회 목적 달성에 필요한 사업
간행물
간행물명
International Journal of Smart Home
간기
격월간
pISSN
1975-4094
수록기간
2008~2016
십진분류
KDC 505DDC 605
이 권호 내 다른 논문 / International Journal of Smart Home Vol.2 No.1