In this research article, we have proposed an analytical model for the performance analysis of the enhanced distributed channel access (EDCA) protocol of IEEE 802.11e wireless local area networks standard, using four-dimensional Markov chain. The contemporary EDCA models support only a small subset of EDCA features with limited accuracy. Our model accurately covers all salient features of stand...

Given the critical role of motion estimation (ME) in a video coder, testing such a module is of priority concern. While focusing on the testing of ME in a video coding system, this work presents an error detection and correction (EDCA) design, based on the residue-and-quotient (RQ) code, to embed into ME for video coding testing applications. An error in processing elements (PEs), i.e. key comp...

This paper presents a simulation analysis for the evaluation of the admission region of a IEEE 802.11e network adopting the EDCA (Enhanced Distributed Channel Access) mechanism. In particular, this study gives an estimate of the number of QoS-aware applications, namely videoconference and Voice over IP (VoIP), that can be admitted to the transport service offered by the EDCA while satisfying th...

The IEEE 802.11e draft is a proposal defining the mechanisms for wireless LANs aiming to provide QoS support to time-sensitive applications, such as, voice and video communications. The 802.11e group is currently working hardly, but the ratification of the standard has a long way to go. In this paper we carry out a performance analysis on the effectiveness of the IEEE 802.11e (EDCA) upcoming st...

This paper investigates the analytic performance of IEEE 802.11e enhanced distributed channel access (EDCA) under saturated traffic load. Compared with the existing analytical models of EDCA, we obtain transmission probability τi by applying the renewal theory and provide simple but accurate delay model for IEEE 802.11e EDCA by considering the possibility that a station’s backoff procedure may ...

IEEE802.11 standards are the most popular techniques used in wireless network. Distributed Coordination Function (DCF) protocol and Enhanced Distributed Channel Access (EDCA) protocol are used in these standards. EDCA protocol is issued to get over the defect in DCF protocol as it does not support Quality of Service (QoS). The mechanism of EDCA protocol is based on dividing the data into four q...

The IEEE 802.11 standard is a widely used base for wireless local area network (WLAN) infrastructure, because of its easy deployment. But it cannot provide QoS support for an increasing number of multimedia applications. With deployment of WLAN, the ability of the IEEE802.11 standard to support multimedia applications with high quality of service (QoS) requirements has increased. This paper eva...

In this paper we expose a dynamic traffic-classification scheme to support multimedia applications such as voice and broadband video transmissions over IEEE 802.11 Wireless Local Area Networks (WLANs). Obviously, over a Wi-Fi link and to better serve these applications– which normally have strict bounded transmission delay or minimum link rate requirement – a service differentiation technique c...

In this study, a new semi-Markov process (SMP)-based model is devised to evaluate the IEEE 802.11p enhanced distributed channel access (EDCA) broadcast performance for vehicular safety communication. Differing from existing SMP analytical models, proposed takes virtual collision among various prioritized categories (ACs) inside each vehicle into consideration. Moreover, in contrast Markov chain...

The IEEE 802.11e standard revises the Medium Access Control (MAC) layer of the former IEEE 802.11 standard for Quality-of-Service (QoS) provision in the Wireless Local Area Networks (WLANs). The Enhanced Distributed Channel Access (EDCA) function of 802.11e defines multiple Access Categories (AC) with AC-specific Contention Window (CW) sizes, Arbitration Interframe Space (AIFS) values, and Tran...