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Impact of 802.11e EDCA on Mixed TCP-Based Applications
White Paper Recent work has shown that the widely-deployed IEEE 802.11 MAC Distributed Coordination Function (DCF) is biased against downstream flows. The new IEEE 802.11e standard introduces QoS mechanisms, such as Enhanced Distributed Channel Access (EDCA... [08 Jan 2008]
Performance of Reliable Transport Protocol Over IEEE 802.11 Wireless LAN: Analysis and Enhancement
White Paper 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. [05 Dec 2007]
Performance Analysis of IEEE 802.11 for Multi-Hop Infrastructure Networks
White Paper Finally, the IEEE 802.11 Distributed Coordination Function (DCF) is modeled for MINs and expressions for the throughput and delay are obtained. Recent interest in Multi-hop Infrastructure Networks (MINs) has resulted in a need for an accurate model... [23 Aug 2007]
Dynamic Fragmentation Scheme for Rate-Adaptive Wireless LANs
White Paper Most of these protocols are receiver-based and employ RTSICTS collision avoidance handshakes specified in the Distributed Coordination Function (DCF) of the IEEE802.11 MAC. Many rate-adaptive MAC protocols have been proposed in the past for... [01 Aug 2007]
Throughput Persistence of Scalable Mobile Ad-Hoc Networks: Evaluation and Enhancement
White Paper The MAC layer definitions of the proposed DSRC standard for vehicle-to-vehicle and roadside-to-vehicle communications have evolved from the specifications for the IEEE 802.11 standard, which supports a Distributed Coordination Function (DCF) mode... [01 Aug 2007]
Performance Issues With IEEE 802.11 in Ad Hoc Networking
White Paper Although 802.11 was initially designed for infrastructure-based networks, the Distributed Coordination Function (DCF) it provides allows mobiles to access the radio medium without the need of a base station. [20 Jul 2007]
Performance Analysis of the 802.11 Distributed Coordination Function Under Sporadic Traffic
White Paper This paper analyzes the performance of the Distributed Coordination Function (DCF) for 802.11 WLANs. It considers a fixed number of contending stations within radio proximity, and investigates the important case in which stations operate under non... [07 Nov 2006]
A Queueing Model for Finite Load IEEE 802.11 Random Access MAC
White Paper This paper presents an analytic model for evaluating the MAC layer queueing delays at wireless nodes using the Distributed Coordination Function of IEEE 802.11 MAC specifications. The model is valid for finite loads and can account for arbitrary... [07 Nov 2006]
Towards the Performance Analysis of IEEE 802.11 in Multi-Hop Ad-Hoc
White Paper The performance of IEEE 802.11 with different network densities and protocol configurations is of interest, particularly in Distributed Coordination Function (DCF) mode. IEEE standard protocol 802.11 is widely used in wireless ad-hoc network. [07 Nov 2006]
Performance Analysis of an Enhanced IEEE 802.11 Distributed Coordination Function Supporting Service Differentiation
White Paper Unfortunately, current WLAN standards like IEEE 802.11 Distributed Coordination Function (DCF) lack this ability. As one of the fastest growing wireless access technologies, Wireless LANs (WLANs) must evolve to support adequate degrees of service... [07 Feb 2006]
Analysis of the IEEE 802.11 DCF With Service Differentiation Support in Non-Saturation Conditions
White Paper Although the performance analysis of the IEEE 802.11 Distributed Coordination Function (DCF) in saturation state has been extensively studied in the literature, little work is present on performance analysis in non-saturation state. [07 Feb 2006]
Supporting Service Differentiation With Enhancements of the IEEE 802.11 MAC Protocol: Models and Analysis
White Paper Unfortunately, current WLAN standards like IEEE 802.11 Distributed Coordination Function (DCF) lack this ability. As one of the fastest growing wireless access technologies, Wireless LANs must evolve to support adequate degrees of service... [07 Feb 2006]
IEEE 802.11 Performance in an Ad-Hoc Environment
White Paper This paper briefly introduces the protocol and presents the results of the simulation of the Distributed Coordination Function (DCF). IEEE 802.11 is the new standard for communication in a wireless LAN. [07 Feb 2006]
An Analytical Model for the IEEE 802.11e Enhanced Distributed Coordination Function
White Paper This paper proposes a three dimensional Markov chain model for the 802.11e Enhanced Distributed Coordination Function (EDCF) mode and compute the maximum sustainable throughput and service delay distribution for each priority class when under... [19 Jan 2006]
Adaptive Transmit Power Control in IEEE 802.11a Wireless LANs
White Paper This paper demonstrates the energy-efficient Distributed Coordination Function (DCF) operation of IEEE 802.11a wireless LANs (WLANs) via TPC and Physical Layer (PHY) rate adaptation. Transmit Power Control (TPC) has been recognized as one of the... [19 Jan 2006]
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