Performance Analysis of Mobile Publish-Subscribe Service Discovery on IPv6 over GeoNetworking

Distributed applications for intelligent transport systems need to discover services according to geographical position not only within vehicular ad-hoc network (VANET) but also through the Internet. While wide variety of service discovery technologies have been proposed, rapidly locating an appropriate service among huge number of mobile nodes is still challenging issue. Furthermore, managing such large number of mobile services in the Internet raises scalability issue due to mobility of vehicles. In this paper, we propose a wide-area, geographical mobile service discovery system by adapting the publish-subscribe scheme to vehicular communication systems based on IPv6 over Geo Networking. The proposed mechanism integrates a hierarchical publish-subscribe architecture into interconnected VANETs on the standardized Geo Networking protocol. Furthermore we present a cross-layer publication management mechanism with exploiting the IPv6 router advertisement packets. Thanks to the geographical routing, our system efficiently manages the large number of mobile services in the edge of the considered network. We study the basic control overhead of our system by presenting a simple analytical model for I2V and V2I2V discovery scenarios.