IEEE 802.11 distributed coordination function (DCF): analysis and enhancement
نویسندگان
چکیده
Being a part of IEEE project 802, the 802.11 Medium Access Control(MAC) is used to support asynchronous and time bounded delivery of radio data packets. It is proposed that a Distributed Coordination Function(DCF), which uses Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) and binary slotted exponential backoff, be the basis of the IEEE 802.11 WLAN MAC protocols. This paper proposes a throughput enhancement mechanism for DCF by adjusting the Contention Window(CW) resetting scheme. Moreover, an analytical model based on Markov chain is introduced to compute the enhanced throughput of 802.11 DCF. The accuracy of the model and the enhancement of the proposed scheme are verified by elaborate simulations.
منابع مشابه
Comments on Comprehensive Analysis of IEEE 802.11 Distributed Coordination Function
In this paper, an improved analytical model for IEEE 802.11 distributed coordination function (DCF) under finite load is proposed by closely following the specifications given in IEEE 802.11 standard. The model is investigated in terms of channel throughput assuming perfect channels. It is shown that the proposed model gives better insight into the operation of DCF compared with the existing an...
متن کاملDesign and theoretical analysis of throughput enhanced spatial reuse distributed coordination function for IEEE 802.11
The IEEE 802.11 distributed coordination function (DCF) employs a carrier sensing mechanism, a simple and effective mechanism tomitigate collisions in wireless networks. But the carrier sensing mechanism is inefficient in terms of shared channel use because an overcautious channel assessment approach is used to estimate interference at a receiver. A DCF node simply blocks its transmission when ...
متن کاملOn the Performance Behavior of IEEE 802.11 Distributed Coordination Function
The basis of the Medium Access Control (MAC), proposed in IEEE 802.11 standard for wireless local area networks, is the Distributed Coordination Function (DCF). DCF uses Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) to resolve contention between wireless stations and to verify successful transmissions. In this work we present an analytical model of the IEEE 802.11 MAC protoco...
متن کاملPerformance of Reliable Transport Protocol over IEEE 802.11 Wireless LAN: Analysis and Enhancement
IEEE 802.11 Medium Access Control(MAC) is proposed to support asynchronous and time bounded delivery of radio data packets in infrastructure and ad hoc networks. The basis of the IEEE 802.11 WLAN MAC protocol is Distributed Coordination Function(DCF), which is a Carrier Sense Multiple Access with Collision Avoidance(CSMA/CA) with binary slotted exponential back-off scheme. Since IEEE 802.11 MAC...
متن کاملAn Improved Analytical Model for IEEE 802.11 Distributed Coordination Function under Finite Load
In this paper, an improved analytical model for IEEE 802.11 distributed coordination function (DCF) under finite load is proposed by closely following the specifications given in IEEE 802.11 standard. The model is investigated in terms of channel throughput under perfect and slow Rayleigh fading channels. It is shown that the proposed model gives better insight into the operation of DCF.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2002