In this paper we describe how the contentionbased medium access mechanism of 802.11e, EDCA, can be enhanced in order to allow stations to reserve medium access for their real-time applications with QoS requirements. We present our proposed scheme, which is called EDCA with resource reservation (EDCA/RR), and describe how it can be extended in order to be used in wireless multi-hop networks. EDCA/RR operates in a completely distributed manner and manages to provide deterministic, contentionfree medium access, making it an attractive scheme for wireless networks. Keywords QoS · IEEE 802.11e · EDCA · Wireless mesh and ad hoc network · Distributed resource reservation In this era of wireless hysteria, with new wireless technologies becoming standardized at a fast rate, we can expect an increased interest for wireless networks such as ad hoc, mesh, and sensor networks. These networks all operate in a distributed manner, independent of any infrastructure or centralized device. Providing quality of service (QoS) in these networks is a challenging, but yet important, task mainly because there is no central device controlling the medium access. Despite this fact, distributed approaches have shown to A. Hamidian ( ) · U. Körner
Ali Hamidian et al. REF described the functionalities of IEEE 802.11e EDCA and introduced EDCA/RR, which is a medium access scheme based on EDCA.
Extending EDCA with distributed resource reservation for QoS guarantees
Telecommunication Systems
Computer Science