Journal
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS
Volume 17, Issue 4, Pages 2377-2396Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/COMST.2015.2440103
Keywords
Vehicle-to-vehicle(V2V); vehicle-to-infrastructure (V2I); heterogeneous networks; long term evolution (LTE); dedicated short range communications (DSRC)
Funding
- National Science Foundation of China [61331009]
- National High-Tech RAMP
- D Program (863 Program) [2015AA01A705]
- National Key Technology RAMP
- D Program of China [2015ZX03002009-004]
- Fundamental Research Funds for the Central Universities [2014ZD03-02]
- China Scholarship Council
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With the rapid development of the Intelligent Transportation System (ITS), vehicular communication networks have been widely studied in recent years. Dedicated Short Range Communication (DSRC) can provide efficient real-time information exchange among vehicles without the need of pervasive roadside communication infrastructure. Although mobile cellular networks are capable of providing wide coverage for vehicular users, the requirements of services that require stringent real-time safety cannot always be guaranteed by cellular networks. Therefore, the Heterogeneous Vehicular NET work (HetVNET), which integrates cellular networks with DSRC, is a potential solution for meeting the communication requirements of the ITS. Although there are a plethora of reported studies on either DSRC or cellular networks, joint research of these two areas is still at its infancy. This paper provides a comprehensive survey on recent wireless networks techniques applied to HetVNETs. Firstly, the requirements and use cases of safety and non-safety services are summarized and compared. Consequently, a HetVNET framework that utilizes a variety of wireless networking techniques is presented, followed by the descriptions of various applications for some typical scenarios. Building such HetVNETs requires a deep understanding of heterogeneity and its associated challenges. Thus, major challenges and solutions that are related to both the Medium Access Control (MAC) and network layers in HetVNETs are studied and discussed in detail. Finally, we outline open issues that help to identify new research directions in HetVNETs.
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