Journal ArticleDOI
Performance analysis of IEEE 802.11 MAC protocols in wireless LANs
TLDR
It is demonstrated that the exponential distribution is a good approximation model for the MAC layer service time for the queueing analysis, and the presented queueing models can accurately match the simulation data obtained from ns-2 when the arrival process at MAC layer is Poissonian.Abstract:
Summary IEEE 802.11 MAC protocol is the de facto standard for wireless local area networks (LANs), and has also been implemented in many network simulation packages for wireless multi-hop ad hoc networks. However, it is well known that, as the number of active stations increases, the performance of IEEE 802.11 MAC in terms of delay and throughput degrades dramatically, especially when each station’s load approaches its saturation state. To explore the inherent problems in this protocol, it is important to characterize the probability distribution of the packet service time at the MAC layer. In this paper, by modeling the exponential backoff process as a Markov chain, we can use the signal transfer function of the generalized state transition diagram to derive an approximate probability distribution of the MAC layer service time. We then present the discrete probability distribution for MAC layer packet service time, which is shown to accurately match the simulation data from network simulations. Based on the probability model for the MAC layer service time, we can analyze a few performance metrics of the wireless LAN and give better explanation to the performance degradation in delay and throughput at various traffic loads. Furthermore, we demonstrate that the exponential distribution is a good approximation model for the MAC layer service time for the queueing analysis, and the presented queueing models can accurately match the simulation data obtained from ns-2 when the arrival process at MAC layer is Poissonian. Copyright # 2004 John Wiley & Sons, Ltd.read more
Citations
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Journal ArticleDOI
Towards achieving efficient MAC protocols for WBAN-enabled IoT technology : a review
Damilola D. Olatinwo,Adnan M. Abu-Mahfouz,Adnan M. Abu-Mahfouz,Gerhard P. Hancke,Gerhard P. Hancke +4 more
TL;DR: In this article, the authors investigated some key MAC protocols that could be exploited in WBANs based on their characteristics, service specifications, technical issues such as energy wastage issues, and possible technical solutions were provided to enhance energy efficiency, channel utilization, data transmission rate, and dealy rate.
Book ChapterDOI
The Impact of Self-similarity on Traffic Shaping in Wireless LAN
TL;DR: This article tries to show that implementation of some mechanisms of traffic shaping causes some improvement of the level of QoS in WLANs, and confirms the necessity of taking into account the self-similar character of wireless traffic.
Journal ArticleDOI
Wi-Fi Coexistence with Duty Cycled LTE-U
TL;DR: In this paper, the authors investigated the fairness of duty cycle-based LTE-U transmission on the same channel and defined the fairness of the above scheme as the difference between Wi-Fi performance loss ratio (considering a defined reference performance) and the duty cycle (or function of LTEU duty cycle).
Proceedings ArticleDOI
Access Delay Analysis of IEEE 802.11 DCF in the Presence of Hidden Stations
Fu-Yi Hung,Ivan Marsic +1 more
TL;DR: An analytical model is presented to evaluate the hidden station effect on the access delay of the IEEE 802.11 distributed coordination function in both non-saturation and saturation condition, under the hidden-station effect.
Journal ArticleDOI
Performance Optimization of CSMA Networks With a Finite Retry Limit
Xinghua Sun,Lin Dai +1 more
TL;DR: The explicit expressions of the network steady-state points, the network throughput, and moments of access delay of successfully transmitted packets are all obtained as the functions of the retry limit M, based on which the optimal network performance is further characterized.
References
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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
A performance comparison of multi-hop wireless ad hoc network routing protocols
TL;DR: The results of a derailed packet-levelsimulationcomparing fourmulti-hopwirelessad hoc networkroutingprotocols, which cover a range of designchoices: DSDV,TORA, DSR and AODV are presented.
Book
Fundamentals of queueing theory
TL;DR: The Fundamentals of Queueing Theory, Fourth Edition as discussed by the authors provides a comprehensive overview of simple and more advanced queuing models, with a self-contained presentation of key concepts and formulae.
Proceedings ArticleDOI
Performance comparison of two on-demand routing protocols for ad hoc networks
TL;DR: It is demonstrated that even though DSR and AODV share a similar on-demand behavior the differences in the protocol mechanics can lead to significant performance differentials.
Journal ArticleDOI
Performance comparison of two on-demand routing protocols for ad hoc networks
TL;DR: It is demonstrated that even though DSR and AODV share similar on-demand behavior, the differences in the protocol mechanics can lead to significant performance differentials.