V2X communications – LTE versus DSRC: Page 3 of 4

April 09, 2018 //By Mark Patrick, Mouser Electronics
V2X communications – LTE versus DSRC
With all the hype surrounding self-driving vehicles based on artificial intelligence (AI), image recognition and sophisticated sensors, it is easy to forget about another important interrelated technology that also promises to help revolutionise driving. It is, in fact, destined to be a critical factor in making autonomous vehicles a reality. Known by the acronym V2X, it covers both vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications.

C-V2X – the mobile industry’s contender

C-V2X is the new name for the V2X standard that was initially launched as LTE-V2X by respected international mobile communications standards body the 3rd Generation Partnership Project (3GPP), in its 3GPP Release 14. The change of name reflects the fact that C-V2X now promises an upgrade path from LTE to the much anticipated 5G mobile standard.

For device-to-device mode direct communications, C-V2X uses the same 5.9 GHz spectrum as DSRC and C-ITS. However, C-V2X devices can also operate in traditional mobile bands to communicate with the mobile network in so-called vehicle-to-network (V2N) mode.  C-V2X device-to-device communications do not require a SIM card, a mobile subscription or any mobile network infrastructure.

C-V2X is a much younger technology than either DSRC or CITS, and is still under development, but early tests have shown that at the data rates required for V2X applications C-V2X reaches a range comparable to DSRC’s 300m at urban driving speeds and achieves 20-30 percent better range at faster speeds.

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