In this paper, an incompletely cooperative game-theoretic MAC protocol is provided to improve the performance of WLANs. Firstly, each node estimates the current state of the game upon running CSMA/CA. Secondly, the node changes its equilibrium strategy by tuning its local contention parameters (i.e., the minimum contention window) based on the estimated game state. Finally, the game is repeated...

This paper proposes an admission control algorithm that enables the upcoming IEEE 802.11e contention based Enhanced Distributed Channel Access (EDCA) to provide quantitative bandwidth guarantees for Wireless Local Area Networks (WLANs), rather than a relative prioritized service. The algorithm estimates the throughput that flows would achieve if a new flow with certain parameters was admitted, ...

~Ihsrruci-~rhe IEEE 802.1 I Medium Access Control (MAC) protucol provides a contention-based distributed channel access mechanism for mobile stations to share the wireless medium, which may introduce a lot of collisions i n ease of overloaded active stations. Slow Contention Window (CW) decrease scheme is a simple and efficient solution for this problem. In this paper, we use an analytical mode...

In this paper, a novel congestion-control scheme with dynamic Burst-Contention Loss notifications in Optical Burst Switching (OBS) networks is proposed. The proposed scheme, called TCP-BCL, aims to handle various OBS bursty conditions that negatively affect TCP throughput performance and fairness. The basic design principle of the scheme is to tune the congestioncontrol parameters α and β such ...

Directional antennas have the considerable benefits of higher antenna gain, long transmission distance and spatial reuse compared to omni‐antennas. To support a directional antenna, IEEE 802.15.3c specifies a high data transmission rate and short frequency range communication based on the characteristics of 60GHz band. However, the contention‐based protocol of IEEE...

Problem statement: The IEEE 802.11e EDCA protocol with different access Categories (ACs) supporting for Quality-of-Service (QoS). Due to internal or external packet collision, the Contention Window (CW) of the station increases the channel idle time under high Bit Error Rate (BER). Approach: In this study, we propose an analytical model for performance evaluation of IEEE 802.11e EDCA scheme und...

A broad class of CSMA protocols use synchronized contention in which nodes periodically contend at intervals of fixed duration. Both analysis and operation of these protocols assume perfect clock synchronization. However, in practice, clocks are not perfectly synchronized and drifts can vary widely, depending on the synchronization mechanism used in the network. We introduce an analytical model...

Distributed multiple access techniques provide quality of service through prioritization of access. Tiered Contention Multiple Access (TCMA) is a CSMA/CA protocol that differentiates between traffic priority classes with respect to the following: arbitration time, persistence factor, and the MAC layer dwell-time limit. The arbitration time is the idle time required before transmission may be at...

Broadcasting communications is critically important in vehicular ad hoc networks. Many safety applications need safety warning messages to be broadcast to all vehicles present in an area. Design of a broadcasting protocol for vehicular ad hoc networks is an interesting problem because of challenges posed by broadcasting traffic, high throughput, high reliability and low delay requirements of th...

The IEEE 802.11 protocol is emerging as a widely used standard and has become the most mature technology for wireless local area networks (WLANs). In this paper, we focus on the tuning of the IEEE 802.11 protocol parameters taking into consideration, in addition to throughput efficiency, performance metrics such as the average packet delay, the probability of a packet being discarded when it re...