Constructing Routing Tree Centralized Scheduling using Multi-Channel System in 802.16

Abstract

The IEEE 802.16 standard defines WiMax (worldwide interoperability for microwave access) mesh network, using the base station (BS) as a coordinator for centralized scheduling. This paper proposes a centralized scheduling algorithm by constructing routing tree in WiMax mesh network, which introduces the cross-layer concept between the media access controller (MAC) and the network layers. The interference, hop-count, spatial reuse and quality of services (QoS) guarantee are considered. In our scheme, each node has one transceiver and can be tuned between multiple channels, intending to eliminate the secondary interference. The result of analysis shows this algorithm greatly improves the length of scheduling, channel utilization ratio (CUR) and average transmission scheduling.

Routing bandwidth guaranteed paths for traffic engineering in WiMAX mesh networks

“…With WiMAX quickly emerging as a reliable network access technology, it is important to assess the QoS issues . Recently, there have been some studies reported in literature that investigate different QoS issues in WiMAX examples of which include . However, to the best of our knowledge, none of these address the issue of bandwidth guaranteed paths that we report in this paper.…”

“…Al‐Hemyari et al . in adopted a procedure in which they consider the network as a rooted graph. They take into account parameters such as the interference from the neighboring nodes.…”