Over the past few years, numerous traffic safety applications have been developed using vehicular ad hoc networks（VANETs）. These applications represent public interest and require network-wide dissemination techniques. On the other hand, certain non-safety applications do not require network-wide dissemination techniques.Such applications can be characterized by their individual interest between two vehicles that are geographically apart. In the existing literature, several proposals of unicast ... 

【文章頁(yè)數(shù)】：25 頁(yè)

【文章目錄】：
1 Introduction
2 Background
    2.1 Limitations on effective communication
        2.1.1 Mobility
        2.1.2 Physical infrastructure
        2.1.3 Communication infrastructure
        2.1.4 Protocol evaluation
    2.2 Requirements of unicast communication in urban vehicular networks
    2.3 Unicast protocol operation in urban vehicular networks
    2.4 Related surveys
3 Thematic taxonomy
    3.1 Thematic taxonomy based on primitive functions of unicast routing
4 Protocol review
    4.1 Description of communication features for unicast protocol review
    4.2 Real-information-assisted approach
    4.3 Offline-information-assisted approach
    4.4 Infrastructure-assisted approach
    4.5 Path-independent approach
    4.6 Evaluation of routing approaches
5 Qualitative unicast protocol comparison
    5.1 Protocol comparison based on derived parameters from thematic taxonomy
        5.1.1 Scope and accuracy
        5.1.2 Route metric stability
        5.1.3 Implementation cost
        5.1.4 Forwarding efficiency
        5.1.5 Computational strategy
    5.2 Protocol comparison based on existing evaluation trends used in simulation platforms
        5.2.1 Evaluation metrics
        5.2.2 Competing comparison
6 Issues and challenges for progressive routing in VANETs
    6.1 Beacon transmission optimization
    6.2 Realistic evaluation metrics
    6.3 Inter-layer communication standardization
7 Summary and conclusions



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