Proceedings ArticleDOI
Revisit of RTS/CTS exchange in high-speed IEEE 802.11 networks
Ilenia Tinnirello,Sunghyun Choi,Youngsoo Kim +2 more
- Vol. 2, pp 240-248
TLDR
It is concluded that, for the heterogeneous data rate environments, the RTS/CTS threshold should be redefined as a frame transmission time rather than as a frames size.Abstract:
IEEE 802.11 medium access control (MAC), called distributed coordination function (DCF), provides two different access modes, namely, 2-way (basic access) and 4-way (RTS/CTS) handshaking. The 4-way handshaking has been introduced in order to combat the hidden terminal phenomenon. It has been also proved that such a mechanism can be beneficial even in the absence of hidden terminals, because of the collision time reduction. We analyze the effectiveness of the RTS/CTS access mode, in current 802.11b and 802.11a networks. Since the rates employed for control frame transmissions can be much lower than the rate employed for data frames, the assumption on the basis of the 4-way handshaking introduction, i.e., a short transmission time for the RTS control frame, is no longer valid. As a consequence, the basic access mode results in the optimal access solution in most cases, even in heavy load conditions with hidden nodes. We compare the 2-way and 4-way access performances through both analytical and simulation tools. We also discuss the operating conditions at which the switch from one access mode to another is desired for the cases of uniform and heterogeneous data rates among the stations. We conclude that, for the heterogeneous data rate environments, the RTS/CTS threshold should be redefined as a frame transmission time rather than as a frame size.read more
Citations
More filters
Journal ArticleDOI
Wireless Mesh Networks Design — A Survey
TL;DR: Different aspects of WMNs design are surveyed and various methods that have been proposed either to improve the performance of an already deployed network or to improve its performance by a careful planning of its deployment are examined.
Journal ArticleDOI
Improving Spatial Reuse in Multihop Wireless Networks - A Survey
TL;DR: Various methods that have been proposed in order to enhance the channel utilization by improving the spatial reuse of the medium access control protocol are surveyed.
Journal ArticleDOI
Effects on IEEE 802.11 MAC Throughput in Wireless LAN Over Fiber Systems
TL;DR: In this paper, an experimental investigation of the influence of the fiber distribution of wireless LAN (WLAN) signals on throughput performance is presented, and results are compared with those from the corresponding simulations in a commercial event-driven network simulator (OPNET).
Journal ArticleDOI
Analysis of the Request to Send/Clear to Send Exchange in WLAN Over Fiber Networks
Majlinda Mjeku,Nathan J. Gomes +1 more
TL;DR: In this article, the effect of the optical path delay on the effectiveness of the request to send/clear to send (RTS/CTS) exchange in high-speed IEEE 802.11 wireless LAN (WLAN) over fiber networks has been carried out.
Journal ArticleDOI
Achieving performance enhancement in IEEE 802.11 WLANs by using the DIDD backoff mechanism
TL;DR: This paper develops an alternative mathematical analysis for the proposed DIDD scheme that is based on elementary conditional probability arguments rather than bi-dimensional Markov chains that have been extensively utilized in the literature.
References
More filters
Journal ArticleDOI
Performance analysis of the IEEE 802.11 distributed coordination function
TL;DR: In this paper, a simple but nevertheless extremely accurate, analytical model to compute the 802.11 DCF throughput, in the assumption of finite number of terminals and ideal channel conditions, is presented.
Proceedings ArticleDOI
How effective is the IEEE 802.11 RTS/CTS handshake in ad hoc networks
Kaixin Xu,Mario Gerla,Sang Bae +2 more
TL;DR: It is shown that in some situations, the interference range is much larger than transmission range, where RTS/CTS cannot function well, and a simple MAC layer scheme is proposed to solve this problem.
Journal ArticleDOI
Goodput analysis and link adaptation for IEEE 802.11a wireless LANs
TL;DR: In-depth simulation shows that the proposed MPDU-based link adaptation scheme outperforms the single-mode schemes and the autorate fallback (ARF) scheme-which is used in Lucent Technologies' WaveLAN-II networking devices-significantly in terms of the average goodput, the frame drop rate, and the average number of transmission attempts per data frame delivery.
Proceedings ArticleDOI
Link adaptation strategy for IEEE 802.11 WLAN via received signal strength measurement
Jd.P. Pavon,Sunghyun Choi +1 more
TL;DR: A novel link adaptation algorithm is presented, which aims to improve the system throughput by adapting the transmission rate to the current link condition and it is shown that the proposed algorithm closely approximates the ideal case with the perfect knowledge about the channel and receiver conditions.