Performance Analysis of m-Retry BEB Based DCF under Unsaturated Traffic Condition

Abstract

The IEEE 802.11 standard offers a cheap and promising solution for small scale wireless networks. Due to the self configuring nature, WLANs do not require large scale infrastructure deployment, and are scalable and easily maintainable which incited its popularity in both literature and industry. In real environment, these networks operate mostly under unsaturated condition. We investigate performance of such a network with m-retry limit BEB based DCF. We consider imperfect channel with provision for power capture. Our method employs a Markov model and represents the most common performance measures in terms of network parameters making the model and mathematical analysis useful in network design and planning. We also explore the effects of packet error, network size, initial contention window, and retry limit on overall performance of WLANs.This full text paper was peer reviewed at the direction of IEEE Communications Society subject matter experts for publication in the WCNC 2010 proceedings.978-1-4244-6398-5/10/$26.00 ©2010 IEEE

Energy efficiency and quality of service optimization for constant bit rate real-time applications in 802.11 networks

“…Bianchi in his seminar paper [8] defines a Markov chain based analytical expression for , which is refined in subsequent works to include effects such as noise and finite retry limit. In this paper, we adopt as primary expression the one in [21] that includes the existence of external noise, non-saturated condition (i.e., limited load) and finite number of retry attempts. For the sake of clarity, we reproduce this expression in Equation (1).…”

Bandwidth mapping model for IEEE 802.11 DCF in unsaturated condition

“…An analytical model for IEEE 802.11 under unsaturated conditions was presented in [9] with analysis of single-hop latency and delivery ratio in the presence of quality of service classes. A model was presented by [10] to measure the effects of packet error, network size, initial contention window and retry limit, which is useful in network design and planning. An explicit expressions was derived in [11] for the mean of the total packet delay and the packet delivery ratio in an unsaturated network.…”