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Sensors 2017, 17(2), 232;

Capacity-Delay Trade-Off in Collaborative Hybrid Ad-Hoc Networks with Coverage Sensing

Department of Communications Engineering, School of Information Science and Technology, Xiamen University, Xiamen 361005, Fujian, China
Key Laboratory of Underwater Acoustic Communication and Marine Information Technology, Ministry of Education, Xiamen University, Xiamen 361005, Fujian, China
Author to whom correspondence should be addressed.
Academic Editors: Mianxiong Dong, Zhi Liu, Anfeng Liu and Didier El Baz
Received: 19 November 2016 / Revised: 12 January 2017 / Accepted: 18 January 2017 / Published: 26 January 2017
(This article belongs to the Special Issue New Paradigms in Cyber-Physical Social Sensing)
Full-Text   |   PDF [735 KB, uploaded 26 January 2017]   |  


The integration of ad hoc device-to-device (D2D) communications and open-access small cells can result in a networking paradigm called hybrid the ad hoc network, which is particularly promising in delivering delay-tolerant data. The capacity-delay performance of hybrid ad hoc networks has been studied extensively under a popular framework called scaling law analysis. These studies, however, do not take into account aspects of interference accumulation and queueing delay and, therefore, may lead to over-optimistic results. Moreover, focusing on the average measures, existing works fail to give finer-grained insights into the distribution of delays. This paper proposes an alternative analytical framework based on queueing theoretic models and physical interference models. We apply this framework to study the capacity-delay performance of a collaborative cellular D2D network with coverage sensing and two-hop relay. The new framework allows us to fully characterize the delay distribution in the transform domain and pinpoint the impacts of coverage sensing, user and base station densities, transmit power, user mobility and packet size on the capacity-delay trade-off. We show that under the condition of queueing equilibrium, the maximum throughput capacity per device saturates to an upper bound of 0.7239 λ b / λ u bits/s/Hz, where λ b and λ u are the densities of base stations and mobile users, respectively. View Full-Text
Keywords: capacity-delay trade-off; ad hoc network; device-to-device capacity-delay trade-off; ad hoc network; device-to-device

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Chen, L.; Luo, W.; Liu, C.; Hong, X.; Shi, J. Capacity-Delay Trade-Off in Collaborative Hybrid Ad-Hoc Networks with Coverage Sensing. Sensors 2017, 17, 232.

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