WCSE

Window-based Cooperative Caching Scheme for Streaming Multimedia Contents in Mobile Ad Hoc Networks

Abstract— Mobile ad-hoc networks (MANETs) are networks comprised of nodes only. Due to the nature of network, energy and communication bandwidth are limited. In the case of MANETs, as nodes move freely, the links between nodes change from moment to moment and, in some cases, a black hole phenomenon where the service is disconnected occurs. Caching is a scheme of storing in advance and using the contents expected to be required later. The caching scheme can improve service delay and service disconnection caused by a black hole phenomenon, etc. The performance of caching depends on which nodes perform caching and which nodes are caching the requested content. In this paper, the contents being transmitted are cached in the node that comprises the transmission path and the requesting node. For streaming service without delay, the client node requests and caches the contiguous frames required for future playback in the current frame of the contents to the neighboring node by the window size. As to performance evaluation, a comparative analysis was carried out with the aggressive caching scheme of unconditionally storing the received data, in the viewpoint of cache hit rate and transmission channel percentage. From the result of the simulation, it could have been confirmed that the proposed scheme has a high cache hit rate and a small number of transmission channels. Accordingly, Window-based Cooperative Caching Scheme can be an an alternative scheme to increase the available energy and transmission efficiency of a node in MANETs.

Index Terms— MANETs, Window, Cooperative Caching, Multimedia, Streaming

Backhyun Kim, Kyeongmo Park
Faculty of Liberal Education, Incheon National University, SOUTH KOREA
Department of Computer Science and Information Engineering, The Catholic University of Korea, SOUTH KOREA

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Cite:Backhyun Kim, Kyeongmo Park " Window-based Cooperative Caching Scheme for Streaming Multimedia Contents in Mobile Ad Hoc Networks " Proceedings of 2020 the 10th International Workshop on Computer Science and Engineering (WCSE 2020), pp.381-387, Shanghai, China, 19-21 June, 2020.