A Geomulticast Routing Protocol Based on Route Stability in Mobile Ad-Hoc Wireless Networks

Geomulticast is a specialized location-dependent multicasting technique, where messages are multicasted to some specific user groups within a specific area [1]. In this paper, we propose a routing protocol for supporting geomulticast service based on route stability in mobile ad-hoc wireless networks. The main features and contributions of the proposed method are as follows. First, we present a direction guided routing method that can reduce control overhead for construction of routes and improve data transmission efficiency. Second, we introduce how to calculate and evaluate link stability between two nodes as well as route stability of multi-hop quantitatively by using nodes’ mobility. Third, we can establish the most stable path by using those two information, link stability and route stability, between a source node and a representative node as well as a representative node and candidate destination nodes within some specific region in order to deliver packets with reliability, reduced overhead, and improved data transmission efficiency. Fourth, a route stability model is presented. We evaluate the proposed routing protocol by using OPNET. The results show that the proposed routing can support the geomulticast services effectively in mobile ad-hoc wireless networks.