Contact duration aware data replication in delay tolerant networks

Xuejun Zhuo, Qinghua Li, Wei Gao, Guohong Cao, Yiqi Dai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

64 Scopus citations

Abstract

The recent popularization of hand-held mobile devices, such as smartphones, enables the inter-connectivity among mobile users without the support of Internet infrastructure. When mobile users move and contact each other opportunistically, they form a Delay Tolerant Network (DTN), which can be exploited to share data among them. Data replication is one of the common techniques for such data sharing. However, the unstable network topology and limited contact duration in DTNs make it difficult to directly apply traditional data replication schemes. Although there are a few existing studies on data replication in DTNs, they generally ignore the contact duration limits. In this paper, we recognize the deficiency of existing data replication schemes which treat the complete data item as the replication unit, and propose to replicate data at the packet level. We analytically formulate the contact duration aware data replication problem and give a centralized solution to better utilize the limited storage buffers and the contact opportunities. We further propose a practical contact Duration Aware Replication Algorithm (DARA) which operates in a fully distributed manner and reduces the computational complexity. Extensive simulations on both synthetic and realistic traces show that our distributed scheme achieves close-to-optimal performance, and outperforms other existing replication schemes.

Original languageEnglish (US)
Title of host publication2011 19th IEEE International Conference on Network Protocols, ICNP 2011
Pages236-245
Number of pages10
DOIs
StatePublished - 2011
Event2011 19th IEEE International Conference on Network Protocols, ICNP 2011 - Vancouver, BC, Canada
Duration: Oct 17 2011Oct 20 2011

Publication series

NameProceedings - International Conference on Network Protocols, ICNP
ISSN (Print)1092-1648

Other

Other2011 19th IEEE International Conference on Network Protocols, ICNP 2011
CountryCanada
CityVancouver, BC
Period10/17/1110/20/11

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Software

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