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Contact duration aware cache refreshing for mobile opportunistic networks

Contact duration aware cache refreshing for mobile opportunistic networks
Contact duration aware cache refreshing for mobile opportunistic networks
Caching is a practical data access approach in mobile opportunistic networks, which enables mobile terminals to obtain data from adjacent nodes and to reduces accessing latency, whereby the updating files should be delivered to the caching nodes on time when the source is refreshed in order to maintain the freshness of the cached data. Due to the node mobility and short communication range, the contact duration in mobile opportunistic networks is short and this limits the amount of data transmitted in one contact. However, current cache refreshing schemes often ignore this critical issue. In this study, the authors study the contact duration aware cache refreshing in mobile opportunistic networks. Specifically, they establish a two-state Markov chain to describe the data delivered from one node to another. Based on the proposed model, they investigate a tree structure to refresh the cached data, where each node is responsible to refresh the data cached at its children and it may opportunistically rely on some relays outside the tree to improve the refreshing efficiency. Extensive trace-driven simulations validate the effectiveness of the authors’ scheme in terms of improving cache refreshing in challenging mobile environments.
2047-4954
93-103
Wang, Fang
d5bae6ed-cb82-4b53-b837-dae55433febc
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4
Yang, Zhixing
4c31c454-9fe8-4980-bab7-9480a67d24e1
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Wang, Fang
d5bae6ed-cb82-4b53-b837-dae55433febc
Wang, Zhaocheng
70339538-3970-4094-bcfc-1b5111dfd8b4
Yang, Zhixing
4c31c454-9fe8-4980-bab7-9480a67d24e1
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80

Wang, Fang, Wang, Zhaocheng, Yang, Zhixing and Chen, Sheng (2016) Contact duration aware cache refreshing for mobile opportunistic networks. IET Networks, 5 (4), 93-103. (doi:10.1049/iet-net.2015.0086).

Record type: Article

Abstract

Caching is a practical data access approach in mobile opportunistic networks, which enables mobile terminals to obtain data from adjacent nodes and to reduces accessing latency, whereby the updating files should be delivered to the caching nodes on time when the source is refreshed in order to maintain the freshness of the cached data. Due to the node mobility and short communication range, the contact duration in mobile opportunistic networks is short and this limits the amount of data transmitted in one contact. However, current cache refreshing schemes often ignore this critical issue. In this study, the authors study the contact duration aware cache refreshing in mobile opportunistic networks. Specifically, they establish a two-state Markov chain to describe the data delivered from one node to another. Based on the proposed model, they investigate a tree structure to refresh the cached data, where each node is responsible to refresh the data cached at its children and it may opportunistically rely on some relays outside the tree to improve the refreshing efficiency. Extensive trace-driven simulations validate the effectiveness of the authors’ scheme in terms of improving cache refreshing in challenging mobile environments.

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More information

Accepted/In Press date: 13 June 2016
Published date: 1 July 2016
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 398889
URI: http://eprints.soton.ac.uk/id/eprint/398889
ISSN: 2047-4954
PURE UUID: ef002368-3652-4218-a593-42f4c87af280

Catalogue record

Date deposited: 04 Aug 2016 11:59
Last modified: 06 Oct 2020 23:39

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Contributors

Author: Fang Wang
Author: Zhaocheng Wang
Author: Zhixing Yang
Author: Sheng Chen

University divisions

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