期刊
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
卷 62, 期 8, 页码 4010-4019出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TVT.2013.2245353
关键词
Coalitional graph game; popular content distribution; vehicular ad hoc networks
资金
- National Nature Science Foundation of China [61061130561, 61222104]
- Ministry of Education of China through the Ph.D. Program Foundation [20110001120129]
- National 973 Project [2013CB336700]
- Qatar National Research Fund
- U.S. National Science Foundation [CNS-1117560, ECCS-1028782, CNS-0905556, CNS-0953377]
- Direct For Computer & Info Scie & Enginr
- Division Of Computer and Network Systems [0953377] Funding Source: National Science Foundation
- Direct For Computer & Info Scie & Enginr
- Division Of Computer and Network Systems [1265268] Funding Source: National Science Foundation
Popular content distribution is one of the key services provided by vehicular ad hoc networks (VANETs), in which a popular file is broadcast by roadside units (RSUs) to the onboard units (OBUs) driving through a particular area. Due to fast speeds and deep fading, some file packetsmight be lost during the vehicle-to-roadside (V2R) broadcasting stage. In this paper, we propose a peer-to-peer (P2P) approach to allow the OBUs to exchange data and complement the missing packets. Specifically, we introduce a coalitional graph game to model the cooperation among OBUs and propose a coalition formation algorithm to implement the P2P approach. Moreover, cognitive radio (CR) is utilized for vehicle-to-vehicle (V2V) transmissions so that the P2P approach does not require additional bandwidth. Simulation results show that the proposed approach performs better under various conditions, relative to the noncooperative approach, in which the OBUs share no information and simply respond to any data request from other OBUs.
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