IEEE 802.11무선 랜 환경에서 RTS / CTS 오버헤드를 고려한 가용대역폭 측정
Available Bandwidth Estimation Considering RTS / CTS Message Overheads in IEEE 802.11 based Wireless LANs
- 발행기관 아주대학교
- 지도교수 노병희
- 발행년도 2011
- 학위수여년월 2011. 2
- 학위명 석사
- 학과 및 전공 일반대학원 컴퓨터공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000011222
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Providing wireless service without spatial restriction has been realized due to rapid growth of IEEE 802.11 based wireless technologies. Recently, AB estimation of the wireless medium has received much attention with the widespread use of real-time multimedia applications which requires certain level of QoS guarantees. In this research, APBE is proposed considering a factor which has been ignored by the previous works: the RTS and CTS overheads in estimating the AB. APBE performs AB estimation with correct measurement of i) the proportion of DIFS and back-off, ii) acknowledgement delay iii) channel idle time in the measurement period and additionally considers the collision probability of RTS and CTS messages and the overhead caused by the RTS and CTS procedure. The performance of APBE has been compared with the previous works and from the simulation results, it is clear that APBE outperforms the existing research in terms of estimation accuracy. Based on correct estimation of AB in IEEE 802.11 based wireless networks, efficient network resource management, QoS guarantees of multimedia applications, and effective admission control can be realized.
more목차
1.Introduction 1
2.Related Works 3
2.1.IEEE 802.11 3
2.1.1.Basic Access Mode 3
2.1.2.RTS/CTS Access Mode 5
2.2.IEEE 802.11e 8
2.2.1.EDCA 8
2.2.2.EDCA Parameter Set 10
2.3.AAC and ABE 13
2.3.1.Evaluation of AAC and ABE 13
2.4.cPEAB 16
3.Proposed scheme: APBE 17
3.1.APBE 17
3.2.Measurement period T 19
3.3.Assessing APBE with cPEAB 20
4.Conclusion 22
References 23
