Who supplies what.
The vehicle-to-everything (V2X) supply chain has four distinct layers, and confusing them is the most common mistake in a procurement conversation: the chipset vendors who make the modem and security silicon, the stack vendors who license the protocol software, the equipment makers who build On-Board and Roadside Units around both, and the alliances and certification bodies who decide whether the result interoperates. No single company covers all four.
This is a short orientation page. Detail lives on chipsets and hardware and stacks and SDKs.
Who supplies what.
| Layer | Who |
|---|---|
| V2X silicon | Qualcomm (including Autotalks CRATON2, SECTON, TEKTON3), NXP (V2X modem line, i.MX 94 / OrangeBox) |
| Modules | Unex, Quectel, u-blox (THEO-P1), Hyundai Mobis (MTCU) |
| Secure elements / HSMs | Infineon SLS37, Microchip ATECC608 family, and the dedicated V2X secure elements the automotive silicon vendors offer alongside their modems |
| Secure elements / HSMs — Ambimat’s own | AmbiSEC — a solder-down security co-processor module |
| OBU / RSU hardware | Cohda Wireless, Commsignia, Denso, Kapsch TrafficCom, Yunex Traffic, Applied Information, Danlaw, Genvict, Huawei, Datang/CICT |
| Software stacks | Commsignia, Cohda V2X-Stack, ETAS/ESCRYPT CycurV2X, AutoCrypt, Elektrobit, Vector |
| PKI / SCMS operators | AutoCrypt, INTEGRITY Security Services (Green Hills), Keyfactor EJBCA (Enrolment Authority role only), TeskaLabs SeaCat PKI |
| Test and simulation | Rohde & Schwarz, Keysight, Anritsu, dSPACE, Spirent, Vector CANoe.Car2x |
| Alliances | 5GAA (139 members), CAR 2 CAR Communication Consortium, OmniAir Consortium, C-Roads Platform, IMT-2020 C-V2X Working Group and CAICV (China) |
The device-side security layer, and two development platforms.
Secure elements and the AmbiSEC module; custom JavaCard applets for credential lifecycle; device-bound identity anchored in the secure element; and, as orderable development platforms, the AmbiOBU and AmbiRSU hardware.
On the software side, Ambimat provides an open ROS 2-based application and development environment for those two platforms — the AmbiV2X Developer Stack — together with V2X protocol integration against a programme-selected profile. The standards-level implementation is kept separate from the application environment, so a programme chooses its own 3GPP, IEEE 1609.x and SAE J2735 profile rather than inheriting one.
Not a certified production V2X stack, not a PKI operator, not a Root CA.
Four bodies, four different jobs.
| Body | What it actually does |
|---|---|
| 5GAA | Founded September 2016 by its eight founding members: AUDI AG, BMW Group, Daimler AG, Ericsson, Huawei, Intel, Nokia and Qualcomm. 5GAA now states more than 130 member companies across vehicle manufacturers, tier-1 suppliers, chipset and communication-system providers, mobile operators and infrastructure vendors. Produces the field-test evidence and the regulatory submissions behind most C-V2X spectrum decisions. |
| CAR 2 CAR Communication Consortium | European, historically ITS-G5-aligned, now positioning as technology-agnostic. Publishes the Basic System Profile whose RS_BSP requirement identifiers European OEMs build to, and the V2X Hardware Security Module Protection Profile the dedicated security parts certify against. |
| OmniAir Consortium | The North American certification body: product certification, qualified test equipment, field-test-site authorisation and test-laboratory authorisation. Its 1609.2.1 security test cases are the commercial gate for US federally funded deployment. |
| C-Roads Platform | European harmonisation and cross-border interoperability. Publishes the C-ITS specifications, runs the X-Test events, and reports the deployment figures the European numbers on this site come from. |
In China the equivalents are the IMT-2020 C-V2X Working Group and CAICV, working alongside CCSA TC10 and China SAE on the T/CSAE series. The Chinese standards stack →
One acquisition removed the independent middle of the market.
Qualcomm's acquisition of Autotalks — agreed May 2023, completed 5 June 2025 after regulatory review — folded the only significant independent V2X-dedicated fabless chipmaker into Snapdragon Digital Chassis. For an integrator that means the realistic radio choices are now Qualcomm, NXP for the 802.11p path, or a module vendor building on one of those. What each publishes →
The security layer consolidated less. Dedicated V2X hardware security modules still come from Infineon and NXP, general-purpose secure elements from Microchip and others, and the integration work — applet architecture, provisioning-line design, credential lifecycle — remains where most of the programme risk actually sits. That is the layer Ambimat works in.
The PKI layer is the thinnest of all. A handful of commercial SCMS operators, one open-core enrolment authority, and no widely available test infrastructure. Where you can actually enrol a device →
Last updated 2026-09-18 · Technical reference maintained by Ambimat Electronics, Ahmedabad, India. Corrections: v2x@ambimat.com