Applications such as transportation management and logistics, emergency response, environmental monitoring and mobile workforce management employ mobile networks as a means of enabling communication and coordination among a possibly very large set of mobile nodes. The majority of those systems may thus require real-time tracking of the nodes and interaction with all participant nodes as well as a means of adaptability in a very dynamic scenario. In this paper, we present a middleware communication service based on the OMG DDS standard that supports on-line tracking and unicast, groupcast and broadcast with several thousand mobile nodes. We then show a Fleet Tracking and Management application built using or middleware, and present the performance results in LAN and WAN settings to evaluate our middleware in terms of scalability and robustness.

Applications such as transportation management and logistics, emergency response, environmental monitoring or mobile workforce management, employ mobile networks as means of enabling communication and coordination among a possibly very large set of mobile nodes. The majority of those systems thus may require real-time tracking of the nodes, interaction with all participant nodes, as well as means of adaptability in a very dynamic scenario. In this paper we present a middleware communication service that supports real-time tracking of several thousands of mobile nodes, demand adaptability, as well as three modes of communication between the nodes: unicast, groupcast and broadcast. We then show Fleet Tracking and Management system and use it to evaluate our middleware.

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