Traffic Differentiation in Dense WLANs with CSMA/ECA-DR MAC Protocol

TL;DR

This paper introduces CSMA/ECA-DR, a distributed reservation mechanism for WLANs that enhances traffic differentiation and network efficiency in dense environments by collaboratively managing access based on estimated active contenders.

Contribution

The paper proposes a novel distributed reservation mechanism, CSMA/ECA-DR, for the CSMA/ECA MAC protocol to improve traffic differentiation in dense WLANs.

Findings

Significant improvement in WLAN efficiency for traffic differentiation.

Effective performance even with a large number of contenders.

Adaptive contention window based on active contenders enhances network performance.

Abstract

In today's WLANs, scheduling of packet transmissions solely relies on the collision and success a station may experience. To better support traffic differentiation in dense WLANs, in this paper, we propose a distributed reservation mechanism for the Carrier Sense Multiple Access Extended Collision Avoidance (CSMA/ECA) MAC protocol, termed CSMA/ECA-DR, based on which stations can collaboratively achieve higher network performance. In addition, proper Contention Window (CW) will be chosen based on the instantaneously estimated number of active contenders in the network. Simulation results from dense scenarios with traffic differentiation demonstrate that CSMA/ECA-DR can greatly improve the efficiency of WLANs for traffic differentiation even with large numbers of contenders.