Journal ArticleDOI
Performance analysis of the IEEE 802.11 distributed coordination function
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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.Abstract:Â
The IEEE has standardized the 802.11 protocol for wireless local area networks. The primary medium access control (MAC) technique of 802.11 is called the distributed coordination function (DCF). The DCF is a carrier sense multiple access with collision avoidance (CSMA/CA) scheme with binary slotted exponential backoff. This paper provides 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. The proposed analysis applies to both the packet transmission schemes employed by DCF, namely, the basic access and the RTS/CTS access mechanisms. In addition, it also applies to a combination of the two schemes, in which packets longer than a given threshold are transmitted according to the RTS/CTS mechanism. By means of the proposed model, we provide an extensive throughput performance evaluation of both access mechanisms of the 802.11 protocol.read more
Citations
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Proceedings ArticleDOI
Routing in multi-radio, multi-hop wireless mesh networks
TL;DR: A new metric for routing in multi-radio, multi-hop wireless networks with stationary nodes called Weighted Cumulative ETT (WCETT) significantly outperforms previously-proposed routing metrics by making judicious use of the second radio.
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An introduction to event-triggered and self-triggered control
TL;DR: An introduction to event- and self-triggered control systems where sensing and actuation is performed when needed and how these control strategies can be implemented using existing wireless communication technology is shown.
Proceedings ArticleDOI
Performance anomaly of 802.11b
TL;DR: In this paper, the performance of the IEEE 802.11b wireless local area networks is analyzed theoretically by deriving simple expressions for the useful throughput, validate them by means of simulation, and compare with several performance measurements.
Journal ArticleDOI
A Survey on Wireless Security: Technical Challenges, Recent Advances, and Future Trends
TL;DR: The security requirements of wireless networks, including their authenticity, confidentiality, integrity, and availability issues, and the state of the art in physical-layer security, which is an emerging technique of securing the open communications environment against eavesdropping attacks at the physical layer are discussed.
Proceedings ArticleDOI
Performance of reliable transport protocol over IEEE 802.11 wireless LAN: analysis and enhancement
TL;DR: This paper proposes a scheme named DCF+, which is compatible with DCF, to enhance the performance of reliable transport protocol over WLAN and introduces an analytical model to compute the saturated throughput of WLAN.
References
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Book
Data networks
TL;DR: Undergraduate and graduate classes in computer networks and wireless communications; undergraduate classes in discrete mathematics, data structures, operating systems and programming languages.
Journal ArticleDOI
Packet Switching in Radio Channels: Part II--The Hidden Terminal Problem in Carrier Sense Multiple-Access and the Busy-Tone Solution
TL;DR: The busy-tone multiple-access mode is introduced and analyzed as a natural extension of CSMA to eliminate the hidden-terminal problem and results show that BTMA with hidden terminals performs almost as well as CSMA without hidden terminals.
Proceedings ArticleDOI
Performance evaluation and enhancement of the CSMA/CA MAC protocol for 802.11 wireless LANs
TL;DR: This paper proposes an adaptive contention window mechanism, which dynamically selects the optimal backoff window according to the estimate of the number of contending stations, and shows that this technique leads to stable behavior, and it outperforms the standard protocol when the network load and theNumber of mobile stations are high.
Journal ArticleDOI
IEEE 802.11-saturation throughput analysis
TL;DR: A simple analytical model is presented to compute the saturation throughput performance in the presence of a finite number of terminals and in the assumption of ideal channel conditions, which shows that the model is extremely accurate in predicting the system throughput.
Journal ArticleDOI
Wireless data communications
Kaveh Pahlavan,Allen H. Levesque +1 more
TL;DR: An overview of the wireless data field is presented, emphasizing three major elements: technologies utilized in existing and currently planned wireless data services, issues related to the performance of these systems, and discernible trends in the continuing development of wireless data systems.