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Mobile Information Systems
Volume 2016, Article ID 5140486, 11 pages
http://dx.doi.org/10.1155/2016/5140486
Research Article

Optimal Network QoS over the Internet of Vehicles for E-Health Applications

1School of Information and Software Engineering, University of Electronic Science and Technology of China, Chengdu 610000, China
2Electrical and Computer Engineering Department, McGill University, Montreal, QC, Canada H3A 0G4
3Department of Computer Science, Electrical and Space Engineering, Lulea University of Technology, 97187 Lulea, Sweden

Received 11 November 2015; Accepted 26 January 2016

Academic Editor: Lingjie Duan

Copyright © 2016 Di Lin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Wireless technologies are pervasive to support ubiquitous healthcare applications. However, a critical issue of using wireless communications under a healthcare scenario is the electromagnetic interference (EMI) caused by RF transmission, and a high level of EMI may lead to a critical malfunction of medical sensors. In consideration of EMI on medical sensors, we study the optimization of quality of service (QoS) within the whole Internet of vehicles for E-health and propose a novel model to optimize the QoS by allocating the transmit power of each user. Our results show that the optimal power control policy depends on the objective of optimization problems: a greedy policy is optimal to maximize the summation of QoS of each user, whereas a fair policy is optimal to maximize the product of QoS of each user. Algorithms are taken to derive the optimal policies, and numerical results of optimizing QoS are presented for both objectives and QoS constraints.