Management of cacheable streaming multimedia content in networks with mobile nodes

AbsfmdI n this paper we discuss the delivery of cacheable streaming content in a network with mobile nodes. Caching and regional replication are important techniques for traffic localizatioo and reduction in load on the network and the content sewer. However traditional caching schemes alone cannot suffice for localization of streaming multimedia traffic in oetworlw with mobile nodes. This is mainly because of limited geographical scope of caches. Mobile nodes can easily move out of such geographical scopes in the duration o f a long sessioo such as that ofa typical streaming multimedia. In this paper we present a novel technique called cache handoff that allows a mobile node to keep switching to the most appropriate caching proxy as it moves, thus counteracting the adverse mobility eNects and maximizing tramc localizntioo. Simulation results show that this tecbulque improves the average delay by almost 25Y0 for a very low cache hit ratio of 0.1. This technique also gives increasingly better performance for larger session durations.