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Dynamic multicast information dissemination in hybrid satellite-wireless networks

We have developed Intelligent Information Dissemination Services (IIDS) to support the dissemination and maintenance of extended situation awareness over a hybrid satellite-wireless network information infrastructure. One of the goals of IIDS is to transparently handle the mismatches in characteristics of satellite and terrestrial wireless networks, allow effective utilization of available bandwidth, and support timely delivery of highly relevant information. IIDS achieve the above by implementing user profile aggregation that incrementally aggregates users into communities sharing common interests to enable multicast-based information dissemination. Based on the user grouping, semantic profile matching customizes information streams based on matching user group interest profiles. By taking into account of expected changes in user profiles. profile-oriented data dissemination achieves predictive push and caching that anticipates future user needs and minimizes latency of data request by making data available before they are explicitly requested. The IIDS software has been deployed on the Digital Wireless Battlefield Network that integrates commercial off-theshelf satellite and wireless products.