Mobility

E-MAC: An Elastic MAC Layer for IEEE 802.11 Networks

Date Added: Sep 2011
Format: PDF

The authors present a system for real-time traffic support in infrastructure and ad-hoc IEEE 802.11 networks. The proposed Elastic MAC (E-MAC) protocol provides a distributed transmission schedule for stations with real-time traffic requirements, while allowing a seamless coexistence with standard IEEE 802.11 clients, protecting best-effort 802.11 traffic from starvation by means of admission control policies. Their scheduling decisions are based on an "Elastic" Transmission OPportunity (TXOP) assignment which allows for efficient wireless resource usage: whenever a real-time station does not use the assigned TXOP, the other real-time stations can take over the unused access opportunity, thus preventing the well known inefficiencies of static TDMA schemes.