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—The contribution of this paper is on the study of packet delays for the IEEE 802.11 wireless local area network DCF MAC protocol. A method is presented capable of taking into account retransmission delays with or without retry limits. We present an analytical model based on a Markov chain which allows us to derive closed form expressions for the packet(More)
— IEEE 802.11 is worldwide established and the most used protocol for Wireless Local Area Networks (WLANs). In this paper, we propose an improved analytical model that calculates IEEE 802.11 DCF performance taking into account both packet retry limits and transmission errors for the IEEE 802.11a protocol. Validation of our new performance model analytical(More)
SUMMARY Wireless local area networks (WLANs) are extremely popular being almost everywhere including business, office and home deployments. The IEEE 802.11 protocol is the dominating standard for WLANs. The essential medium access control (MAC) mechanism of 802.11 is called distributed coordination function (DCF). This paper provides a simple and accurate(More)
SUMMARY Wireless local area networks (WLANs) based on the IEEE 802.11 standards have been widely implemented mainly because of their easy deployment and low cost. The IEEE 802.11 collision avoidance procedures utilize the binary exponential backoff (BEB) scheme that reduces the collision probability by doubling the contention window after a packet(More)
Advanced Infrared (AIr) is a proposed standard of the Infrared Data Association (IrDA) for indoor infrared LANs. AIr Medium Access Control (MAC) employs Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) techniques with Request To Send/Clear To Send (RTS/CTS) frame exchange to address the hidden station problem. A long Collision Avoidance Slot(More)
In this paper, we introduce a comprehensive packet delay analysis for wireless networks based on IEEE 802.11 Distributed Coordination Function (DCF). We develop mathematical models that calculate a set of packet delay metrics, namely a) the average packet delay for successfully transmitted packets, b) the average packet delay of successfully transmitted(More)
The IEEE 802.11 protocol is emerging as a widely used standard and has become the most mature technology for wireless local area networks (WLANs). In this paper, we focus on the tuning of the IEEE 802.11 protocol parameters taking into consideration, in addition to throughput efficiency, performance metrics such as the average packet delay, the probability(More)
IEEE 802.11 is worldwide implemented being the most widely deployed protocol for Wireless Local Area Networks (WLANs). In a realistic environment, WLANs encounter channel fading which causes independent and burst transmission errors which in addition with packet collisions degrade overall performance. In this paper, we present a simple and effective(More)
This paper studies the packet delay distribution of the IEEE 802.11 Distributed Coordination Function (DCF) protocol. DCF treats packets in an unfair manner. Results indicate that in large networks, most packets have very low time delays, some packets have delays close to the average value and a small number of packets experience extremely high delays. We(More)
SUMMARY We present a performance analysis of the Infrared Data Association (IrDA) IR data communications protocol using a mathematical throughput model based on the virtual transmission time of uni-directional IrDA data packets. The IrDA standard speci"es a protocol stack for reliable short-range indoor IR wireless data communication between devices with(More)