2TierCoCS: A two-tier cooperative caching scheme for Internet-based vehicular ad hoc networks

Vehicular Ad hoc Networks(VANETs) are emerging area of mobile ad hoc networks with high speed vehicles as their nodes. Ad hoc communication among vehicles can be used for safety purposes, entertainment and accessing Internet. Though VANETs have received enormous attention in recent years, and emerged in its capabilities, users are still not satisfied with its current performance due to poor data availability and intermittent connectivity. Studies have suggested that massive distributed systems like mobile networks can benefit appreciably by making use of appropriate caching methods. Caching is the process of transparently replicating and locating information for faster access. Cooperative caching can further improve the potential of the caching techniques, which enable coordination and sharing of cached data among multiple nodes. Rapidly changing topology and frequent disconnections makes it difficult to design an efficient caching scheme for caching critical data in VANETs. A two-tier cooperative caching scheme for Internet based vehicular networks is proposed in this paper. A theoretical complexity analysis of algorithms and procedures is also included here.