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Solutions

5G NR C-V2X

What is Cellular-V2X?

Cellular-V2X (C-V2X) is the umbrella term which encompasses both direct communication using sidelink and network communication using downlink/uplink interface. According to the V2X applications defined by 3GPP, V2V, V2I, and V2P would be implemented over PC5 interface operating in ITS 5.9 GHz band while V2N operates in commercial licensed band over Uu interface.

V2N

Down/Uplink

V2I

Sidelink

V2V

Sidelink

V2P

Sidelink

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LTE C-V2X and NR C-V2X

3GPP Release 14 introduced LTE-based sidelink communication operating on 5.9 GHz ITS spectrum as a potential alternative to IEEE 802.11p-based DSRC. As C-V2X standard evolves, Release 16 NR-based sidelink will offer major enhancements in the form of lower latency, higher data rate, and enhanced mobility support – which are expected to support advanced V2X use cases such as autonomous driving, platooning, extended sensors, and remote driving.

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Software Defined Radio (SDR)-based C-V2X platform

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Ettifos provides a SDR type C-V2X solution that can flexibly support not only LTE sidelink-based V2X (3GPP Release 14 and 15), but NR sidelink-based V2X (3GPP Release 16) in one platform. Ettifos’ SDR platform is 100% software-based solution running on top of standard Linux which supports end-to-end C-V2X data communication. This can accelerate the testing process in research institutes and also shorten development cycle times for equipment manufacturers. Ettifos showcased SDR-based C-V2X solution at past ITS World Congress and CES 2020 where successful interoperability test was demonstrated with the Qualcom’s MDM 9150 C-V2X chipset solution. 

Baseband and stack

C-V2X sidelink SDR

RAT Selection

Parameter Configuration

ITS Protocol Stack

Application Layer

Facility Layer

Network Layer (WSMP/GeoNetworking)

Security

MAC

RLC

PDCP

SDAP

MAC

RLC

PDCP

NR Sidelink Layer 2

LTE Sidelilnk Layer 2

QoS flow mapping

SLRB establishment, ROHC, Integrity

UM (Group/Broadcast), AM (Unicast)

Scheduling, RRM, HARQ 

SC-FDMA

Viterbi

Turbo

LTE Sidelink PHY

NR Sidelink PHY

Polar

LDPC

MIMO

CP-OFDM

Configurable slot structure (Numerology)

2-layer spatial multiplexing

Fronthaul Interface

Fully Software-implemented

LTE and NR sidelink testing platform

Flexibility

Easy to upgrade, configure parameters and customize algorithms.

Agility

Start verifying your V2X solutions before SoC modem is available in the market.

Cost-effectiveness

Support multiple standards in a single hardware.

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