An Efficient Adaptive Cache Update Protocol for Mobile Adhoc Networks | Original Article
The cooperative caching is one of the most attractive schemes used in the area of Mobile Adhoc Networks (MANETs) to improve the data access performance. The cached data is shared between multiple mobile nodes which cooperatively manages the cached contents. The node mobility and unpredictable network partitioning creates additional overhead, latency and reduces data access ratios in the highly dynamic network environment. An efficient adaptive cache update protocol (ACUP) is proposed in this paper, which address the above problems effectively. A Rendezvous Region (RR) is adopted in the proposed work to exploit the cluster based approach that satisfies the data consistency requirements among partitioned network. A content server transmits data through cluster head nodes (H-Nodes) to local mobile nodes (L-Nodes) in a rendezvous region. The ACUP provides the consistency of cached data in L nodes by utilizing a Time-To-Live (TTL) threshold value. The simulation results show that the proposed scheme outperforms the existing scheme called Flexible Cache Consistency Maintenance (FCCM) in terms of reduced delay, control overheads and increased packet delivery ratio.