Node Status Aware Distributed Cooperative CachingMechanism for Opportunistic Networks

WANG Ruyan; YANG Huiping; YING Jun; SHU Na

doi:10.11999/JEIT151374

Volume 38 Issue 9

Sep. 2016

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WANG Ruyan, YANG Huiping, YING Jun, SHU Na. Node Status Aware Distributed Cooperative CachingMechanism for Opportunistic Networks[J]. Journal of Electronics & Information Technology, 2016, 38(9): 2194-2201. doi: 10.11999/JEIT151374

Citation:

WANG Ruyan, YANG Huiping, YING Jun, SHU Na. Node Status Aware Distributed Cooperative CachingMechanism for Opportunistic Networks[J]. Journal of Electronics & Information Technology, 2016, 38(9): 2194-2201. doi: 10.11999/JEIT151374

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Node Status Aware Distributed Cooperative CachingMechanism for Opportunistic Networks

doi: 10.11999/JEIT151374 cstr: 32379.14.JEIT151374

Funds:

The National Natural Science Foundation of China (61371097, 61271261), Chongqing Natural Science Foundation (CSTC2013JJB40001, CSTC2013JJB40006), Chongqing Education Commission Project (KJ1400402), Youth Talents Training Project of Chongqing Science Technology Commission (CSTC2014KJRC-QNRC40001)

Received Date: 2015-12-08
Rev Recd Date: 2016-04-18
Publish Date: 2016-09-19

Abstract

Abstract

By reasonably exploiting the collaborative relationships between nodes and the limited cache resources of neighbor nodes, the cache utilization rate and the message delivery probability of opportunistic networks can be effectively improved. A node status aware distributed cooperative cache management mechanism is proposed in the paper, where the importance degree of a given message can be dynamically estimated by perceiving its spreading degree to determine the caching priority. Furthermore, according to the active degree and the relative viscosity, the encounter probability of a given message to its destination node can be obtained for the design of adaptive cooperative cache management strategies for messages in each cache area respectively. When the cache is fully occupied, the collaboration node within the transmission range is dynamically selected, thus the message transferring to the collaboration node and the efficient utilization of caching resources can be ideally achieved. The results show that the proposed caching mechanism can fully exploit the limited cache resources and greatly improve the message delivery rate and the buffer utilization rate.
- Opportunistic networks,
- Spreading degree,
- Encounter probability,
- Collaboration node

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References(16)

References

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