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Contact-aware data replication in roadside unit aided vehicular opportunistic networks

Contact-aware data replication in roadside unit aided vehicular opportunistic networks
Contact-aware data replication in roadside unit aided vehicular opportunistic networks
Roadside units (RSUs), which enable vehicles to-infrastructure communications, are deployed along roadsides to handle the ever-growing communication demands caused by explosive increase of vehicular traffics. How to efficiently utilize them to enhance the vehicular delay tolerant network (VDTN) performance are the important problems in designing RSU-aided VDTNs. In this work, we implement an extensive experiment involving tens of thousands of operational vehicles in Beijing city. Based on this newly collected Beijing trace and the existing Shanghai trace, we obtain some invariant properties for communication contacts of large scale RSU-aided VDTNs. Specifically, we find that the contact time between RSUs and vehicles obeys an exponential distribution, while the contact rate between them follows a Poisson distribution. According to these observations, we investigate the problem of communication contact-aware mobile data replication for RSU-aided VDTNs by considering the mobile data dissemination system that transmits data from the Internet to vehicles via RSUs through opportunistic communications. In particular, we formulate the communication contact-aware RSU-aided vehicular mobile data dissemination problem as an optimization problem with realistic VDTN settings, and we provide an efficient heuristic solution for this NP-hard problem. By carrying out extensive simulation using realistic vehicular traces, we demonstrate the effectiveness of our proposed heuristic contact-aware data replication scheme, in comparison with the optimal solution and other existing schemes.
mobile date dissemination, communication contact, data replication, vehicular delay tolerant networks
1536-1233
306-321
Li, Yong
0817e950-114f-47f3-aefe-74bf9ec0e2a3
Jin, Depeng
d5ef5d7e-82a7-4950-85cf-800fe7794cc5
Hui, Pan
f89491e3-a0ed-4475-a0ee-a874e3514e98
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Li, Yong
0817e950-114f-47f3-aefe-74bf9ec0e2a3
Jin, Depeng
d5ef5d7e-82a7-4950-85cf-800fe7794cc5
Hui, Pan
f89491e3-a0ed-4475-a0ee-a874e3514e98
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80

Li, Yong, Jin, Depeng, Hui, Pan and Chen, Sheng (2016) Contact-aware data replication in roadside unit aided vehicular opportunistic networks. IEEE Transactions on Mobile Computing, 15 (2), 306-321. (doi:10.1109/TMC.2015.2416185).

Record type: Article

Abstract

Roadside units (RSUs), which enable vehicles to-infrastructure communications, are deployed along roadsides to handle the ever-growing communication demands caused by explosive increase of vehicular traffics. How to efficiently utilize them to enhance the vehicular delay tolerant network (VDTN) performance are the important problems in designing RSU-aided VDTNs. In this work, we implement an extensive experiment involving tens of thousands of operational vehicles in Beijing city. Based on this newly collected Beijing trace and the existing Shanghai trace, we obtain some invariant properties for communication contacts of large scale RSU-aided VDTNs. Specifically, we find that the contact time between RSUs and vehicles obeys an exponential distribution, while the contact rate between them follows a Poisson distribution. According to these observations, we investigate the problem of communication contact-aware mobile data replication for RSU-aided VDTNs by considering the mobile data dissemination system that transmits data from the Internet to vehicles via RSUs through opportunistic communications. In particular, we formulate the communication contact-aware RSU-aided vehicular mobile data dissemination problem as an optimization problem with realistic VDTN settings, and we provide an efficient heuristic solution for this NP-hard problem. By carrying out extensive simulation using realistic vehicular traces, we demonstrate the effectiveness of our proposed heuristic contact-aware data replication scheme, in comparison with the optimal solution and other existing schemes.

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More information

Accepted/In Press date: 24 February 2015
e-pub ahead of print date: 24 March 2015
Published date: February 2016
Keywords: mobile date dissemination, communication contact, data replication, vehicular delay tolerant networks
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 385699
URI: http://eprints.soton.ac.uk/id/eprint/385699
ISSN: 1536-1233
PURE UUID: 34b3e09d-2b0e-4ada-9926-d7118d38c31a

Catalogue record

Date deposited: 21 Jan 2016 11:38
Last modified: 16 Dec 2019 20:09

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Contributors

Author: Yong Li
Author: Depeng Jin
Author: Pan Hui
Author: Sheng Chen

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