Analysis of Storage Congestion Control Techniques in Mobile Opportunistic Networks: A Review

Abstract

Opportunistic Networks are type of MANET’s where contacts between mobile nodes are unpredictable and source to destination path rarely exists. Due to irregular contacts between mobile nodes, data dissemination is taking place hop-by-hop of message transfer in communication networks. Data replication and unpredictable contact times leads to congestion at nodes which necessitate buffer management control mechanisms between mobile nodes. The congestion control may be single copy and multi copy, whereas single copy congestion control uses local information at the node for decision making about the hop by hop custody transfer of message, which is liable to fail due to disconnection or change in latency of signal. Multi copy is replication based mechanism which achieves large delivery performance at the expense of high transmission cost in terms of extra overhead, energy and resource usage. The need arises to measure the congestion locally and how it can be further effectively considered by routing mechanisms. The congestion control can be regarded complimentary component of routing in mobile opportunistic networks, as both shares the common challenge of inadequate network information. In future work, self learning algorithms ought to be designed and integrated and for buffer management to enhance latency.