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Hierarchical Network Architecture for Non-Safety Applications in Urban Vehicular Ad-Hoc Networks
Sangsoo Jeong1, Youngmi Baek2, Sang Hyuk Son3
1Department of Information and Communication Engineering, DGIST, Daegu 42988, Korea. 88jeongss@dgist.ac.kr.
Sensors (Basel, Switzerland)
|October 9, 2019
Summary
A new hybrid V2V communication system (HVCS) improves non-safety data transmission in vehicular ad-hoc networks (VANETs). It offers fast connections and reliable data delivery, outperforming existing WAVE technology for services like video streaming.
Area of Science:
- * Vehicular communication networks
- * Wireless networking protocols
- * Network performance analysis
Background:
- * Wireless Access in Vehicular Environments (WAVE) struggles with high-volume, non-safety data transmission in multi-hop vehicular ad-hoc networks (VANETs).
- * Existing systems face challenges in guaranteeing performance for non-safety applications, impacting user experience.
Purpose of the Study:
- * To propose a Hybrid V2V Communication System (HVCS) for effective and reliable non-safety data transmission in VANETs.
- * To enhance connectivity and data throughput using a hierarchical architecture combining centralized control and local data propagation.
- * To improve connection establishment times and simplify security provisioning for VANET applications.
Main Methods:
- * Developed a two-tier HVCS with a traffic controller for centralized control (cellular networks) and smartphones for local propagation (Wi-Fi Direct).
- * Implemented a hierarchical networking architecture featuring node discovery, Local Ad-hoc Group (LAG) formation, LAG owner (LAGO) determination, and LAG management.
- * Designed three phases: concise device discovery (CDD), concise provisioning (CP), and data transmission, utilizing store-and-forward for vehicles outside LAGs.
Main Results:
- * Achieved a connection establishment time of 0.95 seconds.
- * Demonstrated high throughput (74%-81%) for streaming data in high vehicle densities (>50%).
- * Ensured 98% of video streaming events played at over 16 frames per second, meeting Quality of Service (QoS) requirements.
Conclusions:
- * The proposed HVCS effectively supports non-safety applications in VANETs, offering robust performance and high throughput.
- * The hierarchical architecture and distinct control/propagation models enhance efficiency and reliability compared to traditional WAVE systems.
- * HVCS demonstrates significant improvements in connection speed and data transmission quality for vehicular environments.
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