Performance analysis of IEEE 802.11 MAC protocols in wireless LANs
نویسندگان
چکیده
IEEE 802.11 MAC protocol is the de facto standard for wireless 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 to 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. Keywords—Performance Evaluation, IEEE 802.11 MAC, Wireless LANs, Queueing Analysis
منابع مشابه
Performance of wireless LANs based on IEEE 802.11 MAC protocols
IEEE 802.11 MAC protocol has been the standard for Wireless LANs, and also adopted in many network simulation packages for wireless multi-hop ad hoc networks. However, it is well known that, as the traffic goes up, the performance of IEEE 802.11 MAC drops dramatically in terms of delay and throughput, especially when the station approaches its saturation state. To explore the inherent problems ...
متن کاملPerformance Analysis for a New Medium Access Control Protocol in Wireless LANs
One fundamental issue in high-speed wireless local area networks (LANs) is to develop efficient medium access control (MAC) protocols. In this paper, we focus on the performance improvement in both MAC layer and transport layer by using a novel medium access control protocol for high-speed wireless LANs deploying carrier sense multiple access/collision avoidance (CSMA/CA). We first present a re...
متن کاملConnectivity-Based Reliable Multicast MAC Protocol for IEEE 802.11 Wireless LANs
We propose the efficient reliable multicast MAC protocol based on the connectivity information among the recipients. Enhancing the BMMM (Batch Mode Multicast MAC) protocol, the reliable multicast MAC protocol significantly reduces the RAK (Request for ACK) frame transmissions in a reasonable computational time and enhances the MAC performance. By the analytical performance analysis, the through...
متن کاملA Finite Load Analytical Model for the IEEE 802.11 Distributed Coordination Function MAC
Abstract— CSMA/CA protocols such as IEEE 802.11b are considered to be attractive MAC protocols for wireless LANs. In this paper, we extend a saturation throughput model for the IEEE 802.11 Distributed Coordination Function (DCF) MAC protocol to finite loads. The analytical model can help in the optimization of the protocol parameters as well as leading to the performance modeling of multi-hop a...
متن کاملA new SDN-based framework for wireless local area networks
Nowadays wireless networks are becoming important in personal and public communication andgrowing very rapidly. Similarly, Software Dened Network (SDN) is an emerging approach to over-come challenges of traditional networks. In this paper, a new SDN-based framework is proposedto ne-grained control of 802.11 Wireless LANs. This work describes the benets of programmableAcc...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Wireless Communications and Mobile Computing
دوره 4 شماره
صفحات -
تاریخ انتشار 2004