Telecom Tutorials by Samir Amberkar

»	Basic idea behind V2V Basic idea behind V2V (Vehicle to Vehicle) is exchange of information between vehicles to achieve common goal of public safety (on road) and efficient traffic. ETSI formulated ITS (Intelligent Transport Systems) specifications to standardise the requirements and protocols.

»	CV2X 3GPP enhanced Sidelink (concept introduced under "Proximity Services") to support V2V communication in unlicenced spectrum (LTE Band 47, 5.9 GHz). This is popularly known as Cellular V2X or simply, CV2X. Below are relevant top level 3GPP reports and standards.

»	For comprehensive top level understanding, please refer below CV2X presentation. A look at CV2X (for Modem developer)

»	Autonomous selection One of the major CV2X enhancements is Sidelink transmission mode 4. This mode cover algorithm for autonomous selection of RF resources. It is implemented at RRC/MAC/PHY(control) level and below diagram gives top level view of the same.

»	Detailed Whitepaper on Autonomous Selection C-V2X Autonomous Resource Selection Explained

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