What is ISO 22738 about?
ISO 22738 specifies OCC (Optical Camera Communication) as an access technology for localized communications applicable in ITS stations conforming with ISO 21217.
OCC access technology is specified for the implementation context of ISO 21218. ISO 22738 provides specifications of a communication interface (CI) named "ITS-OCC".
ISO 22738 specifies the additions to and deviations from IEEE 802.15.7:2018 which are required in order to make ITS-OCC CIs compatible with:
- The ITS station and communication architecture specified in ISO 21217
- The hybrid communications support specified in ISO 21218
ISO 22738 specifies:
- An OCC profile of IEEE 802.15.7:2018 for usage in C-ITS
- Details of CAL
- Details of MAE
Who is ISO 22738 for?
ISO 22738 on Intelligent transport systems — Localized communications — Optical camera communication is useful for:
- Optical camera manufacturer
- Localised traffic regulation authority
- Light and heavy commercial transport industry
Why should you use ISO 22738?
Localized communications are an essential component of hybrid communications in Intelligent Transport Systems (ITS). Various access technologies are suited for localized communications. An increasing interest of ITS stakeholders for Cooperative ITS (C-ITS), Urban ITS (U-ITS), and Advanced Driver Assistance Systems (ADAS) is on the access technology in OCC (Optical Camera Communication) specified by IEEE.
OCC is capable of:
- Interoperating with cameras and LEDs devices, and
- Receiving messages from LED sources and transmitting messages from back light and front light of vehicles to other vehicles.
The purpose of OCC is broadcast dissemination of ITS information from:
- Light sources (traffic light, streetlight, traffic sign)
- Vehicles to other vehicles (one-to-many)
OCC uses LEDs as transmitters and cameras as receivers with visible light or near IR (NIR). Characteristics of OCC are:
- Visibility (visible light band)
- No regulation in optical frequency
- Harmlessness to human health (infrared and visible light band)
- Non-interference with CIs based on radio waves
- License-free operation
ISO 22738 specifies OCC (Optical Camera Communication) as an access technology for localized communications applicable in ITS stations conforming with ISO 21217