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Exponential and power law distribution of contact duration in urban vehicular ad hoc networks

Exponential and power law distribution of contact duration in urban vehicular ad hoc networks
Exponential and power law distribution of contact duration in urban vehicular ad hoc networks
Contact duration between moving vehicles is one of the key metrics in vehicular ad hoc networks (VANETs), that critically influences the design of routing schemes and network throughput. Due to prohibitive costs to collect enough realistic contact records, little experimental work has been conducted to study the contact duration in urban VANETs. In this work, we carry out an extensive experiment involving tens of thousands of operational taxis in Beijing city. Based on studying this newly collected Beijing trace and the existing Shanghai trace, we find an invariant characteristic that there exists a characteristic time point, up to which the contact duration obeys an exponential distribution that includes at least 80% of the whole distribution, while beyond which it decays as a power law one. This property is in sharp contrast to the recent empirical data studies based on human mobility, where the contact duration exhibits a power law distribution. Our observations thus provide fundamental guidelines for the design of new urban VANETs’ routing protocols and their performance evaluation
110-113
Li, Yong
0817e950-114f-47f3-aefe-74bf9ec0e2a3
Jin, Depeng
d5ef5d7e-82a7-4950-85cf-800fe7794cc5
Zhaocheng, Wang
e2141594-58b2-4ba7-9b8f-f3778499ba8c
Zeng, Lieguang
7c5984b7-b38d-44a1-a1f5-66f2b87e6ff9
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80
Li, Yong
0817e950-114f-47f3-aefe-74bf9ec0e2a3
Jin, Depeng
d5ef5d7e-82a7-4950-85cf-800fe7794cc5
Zhaocheng, Wang
e2141594-58b2-4ba7-9b8f-f3778499ba8c
Zeng, Lieguang
7c5984b7-b38d-44a1-a1f5-66f2b87e6ff9
Chen, Sheng
9310a111-f79a-48b8-98c7-383ca93cbb80

Li, Yong, Jin, Depeng, Zhaocheng, Wang, Zeng, Lieguang and Chen, Sheng (2013) Exponential and power law distribution of contact duration in urban vehicular ad hoc networks. IEEE Signal Processing Letters, 20 (1), 110-113. (doi:10.1109/LSP.2012.2231412).

Record type: Article

Abstract

Contact duration between moving vehicles is one of the key metrics in vehicular ad hoc networks (VANETs), that critically influences the design of routing schemes and network throughput. Due to prohibitive costs to collect enough realistic contact records, little experimental work has been conducted to study the contact duration in urban VANETs. In this work, we carry out an extensive experiment involving tens of thousands of operational taxis in Beijing city. Based on studying this newly collected Beijing trace and the existing Shanghai trace, we find an invariant characteristic that there exists a characteristic time point, up to which the contact duration obeys an exponential distribution that includes at least 80% of the whole distribution, while beyond which it decays as a power law one. This property is in sharp contrast to the recent empirical data studies based on human mobility, where the contact duration exhibits a power law distribution. Our observations thus provide fundamental guidelines for the design of new urban VANETs’ routing protocols and their performance evaluation

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Published date: January 2013
Organisations: Southampton Wireless Group

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Local EPrints ID: 346343
URI: http://eprints.soton.ac.uk/id/eprint/346343
PURE UUID: 03f012bb-5ea0-40c7-b313-19c84765adea

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Date deposited: 02 Jan 2013 11:23
Last modified: 11 Nov 2019 21:00

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