A Hexagonal-Tree TDMA-Based QoS Multicasting Protocol for Wireless Mobile Ad-Hoc Networks

Abstract

In this paper, we propose a new TDMA-based QoS multicast routing protocol, namely the hexagonal-tree QoS multicast protocol, for a wireless mobile ad hoc network. Existing QoS routing solutions have addressed this problem by assuming a stronger multi-antenna model or a less stronger CDMA-over-TDMA channel model. This study attempts to build a new multicast tree structure, namely hexagonal tree, to serve as the QoS multicasting tree, where the MAC sub-layer is adopted the TDMA channel model. In this work, both of the hidden-terminal and exposed-terminal problems are taken into consideration to possibly exploit the time-slot re-use capability. The hexagonal-based scheme offers a higher success rate to construct the QoS multicast tree due to using the hexagonal-tree. The hexagonal-tree is a tree whose sub-path of the tree is the hexagonal-path. The hexagonal-path is a special two-path structure. This greatly improves the success rate by means of multi-path routing. Performance analysis results is finally discussed to demonstrate the efficient QoS multicasting achievement.