[Paper Review] Use Cases, Requirements, and Design Considerations for 5G V2X

Mate Boban, Απόστολος Κουσαρίδας+3 more|arXiv (Cornell University)|Dec 5, 2017

Vehicular Ad Hoc Networks (VANETs)11 references52 citations

TL;DR

The paper consolidates V2X use cases and their requirements, assesses LTE-V2X, 802.11p, mmWave, and VVLC capabilities, and outlines a 5G V2X architecture with gap analysis.

ABSTRACT

Ultimate goal of next generation Vehicle-to-everything (V2X) communication systems is enabling accident-free cooperative automated driving that uses the available roadway efficiently. To achieve this goal, the communication system will need to enable a diverse set of use cases, each with a specific set of requirements. We discuss the main use case categories, analyze their requirements, and compare them against the capabilities of currently available communication technologies. Based on the analysis, we identify a gap and point out towards possible system design for 5G V2X that could close the gap. Furthermore, we discuss an architecture of the 5G V2X radio access network that incorporates diverse communication technologies, including current and cellular systems in centimeter wave and millimeter wave, IEEE 802.11p and vehicular visible light communications. Finally, we discuss the role of future 5G V2X systems in enabling more efficient vehicular transportation: from improved traffic flow through reduced inter-vehicle spacing on highways and coordinated intersections in cities (the cheapest way to increasing the road capacity), to automated smart parking (no more visits to the parking!), ultimately enabling seamless end-to-end personal mobility.

Motivation & Objective

• Consolidate and analyze relevant V2X use cases and their requirements to drive 5G V2X design.
• Assess current communication technologies against V2X use case requirements to identify gaps.
• Propose guidelines for integrating existing and future communications into a 5G V2X solution.
• Describe an architecture for a 5G V2X radio access network that accommodates diverse technologies.

Proposed method

• Survey and categorize V2X use cases (e.g., cooperative awareness, sensing, maneuver, VRU, traffic efficiency, teleoperation).
• Extract performance requirements (latency, reliability, data rate, range) from ETSI ITS, US DOT, 3GPP, and 3GPP Release 15 specifications.
• Perform qualitative gap analysis comparing LTE-V2X, IEEE 802.11p, mmWave, and VVLC against use-case requirements.
• Propose a multi-RAT 5G V2X architectural concept that integrates cm-/mm-wave cellular, V2V/V2I, VVLC, and legacy systems.
• Discuss implications for architecture to support low latency, high reliability, and scalability.

Experimental results

Research questions

• RQ1 What are the main V2X use cases and their stringent performance requirements for 5G V2X?
• RQ2 How well do existing technologies (LTE-V2X, 802.11p, mmWave, VVLC) meet these requirements in different use-case contexts?
• RQ3 What architectural approaches can bridge gaps between current technologies and 5G V2X needs?
• RQ4 What role should heterogeneous communication technologies play in a 5G V2X radio access network?

Key findings

• V2X use cases span cooperative awareness, sensing, maneuver, VRU, traffic efficiency, and teleoperation, with varied latency, reliability, and data-rate needs.
• Cooperative awareness typically uses 1–10 Hz periodic messages with 60–1500 B payload and 90–95% reliability at up to 100 ms–1 s latency.
• Cooperative sensing may require up to 25 Mbps and >99% reliability within about 3 ms for raw sensor data; HD video (when used) can reach 10 Mbps, with higher data rates for sensor sharing.
• Cooperative maneuvers include platooning and cooperative intersection control with latency as tight as <3 ms and reliability >99% for some scenarios; data rates up to 1.3 Mbps per vehicle for trajectories in emergency cases.
• LTE-V2X and IEEE 802.11p can support many cooperative awareness and sensing use cases but face limitations under high load or stringent latency/reliability demands; mmWave and VVLC offer high data rates and short-range, LOS-friendly links but cannot cover all ranges or NLOS conditions alone.
• A 5G V2X architecture that combines multiple radio access technologies (cm-/mm-wave cellular, V2V/V2I, VVLC) is needed to meet the full set of 5G V2X requirements.