Directory Service for Mobile IoT Applications

We propose a novel IoT directory service for storing, updating, and providing records of mobile IoT devices or objects. The IoT directory service is designed to manage a massive number of records (about one billion) and support fast lookup (latency of less than 10ms). It performs proactive caching of the records in various replicas (following the movement of mobile IoT devices or application clients) by dynamically assigning virtualized network and computing resources so that the lookup latency always remains low. The cache replicas are tracked to update them globally (latency of few seconds) whenever a record changes due to mobility. We have preliminarily implemented the directory service system and studied its performance in terms of lookup and update latencies.