Dynamic Popular Content Distribution in Vehicular Networks using Coalition Formation Games



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IEEE Journal on Selected Areas in Communications


Driven by both safety concerns and commercial interests, vehicular ad hoc networks (VANETs) have recently received considerable attentions. In this paper, we address popular content distribution (PCD) in VANETs, in which one large popular file is downloaded from a stationary roadside unit (RSU), by a group of on-board units (OBUs) driving through an area of interest (AoI) along a highway. Due to high speeds of vehicles and deep fadings of vehicle-to-roadside (V2R) channels, some of the vehicles may not finish downloading the entire file but only possess several pieces of it. To successfully send a full copy to each OBU, we propose a cooperative approach based on coalition formation games, in which OBUs exchange their possessed pieces by broadcasting to and receiving from their neighbors. Simulation results show that our proposed approach presents a considerable performance improvement relative to the non-cooperative approach, in which the OBUs broadcast randomly selected pieces to their neighbors as along as the spectrum is detected to be unoccupied.



Vehicular ad hoc networks, popular content distribution, coalition formation game


Copyright 2013 IEEE Journal on Selected Areas in Communications. This is a pre-print version of a published paper that is available at: https://ieeexplore.ieee.org/abstract/document/6550882. Recommended citation: Wang, Tianyu, Lingyang Song, Zhu Han, and Bingli Jiao. "Dynamic popular content distribution in vehicular networks using coalition formation games." IEEE Journal on Selected Areas in Communications 31, no. 9 (2013): 538-547. doi: 10.1109/JSAC.2013.SUP.0513048. This item has been deposited in accordance with publisher copyright and licensing terms and with the author's permission.