ARIB STD-T108

ARIB STD-T108 defines the technical requirements for low-power wireless devices operating in the 920 MHz band in Japan. The standard supports narrowband and LPWAN technologies and is primarily used in smart metering, logistics, and telemetry applications. It provides the regulatory basis for certifying such equipment under the Japanese Radio Law.

Scope and Application

The standard applies to sub-GHz wireless systems used for:

• Smart meters (gas, water, electricity)

• LPWAN technologies such as Sigfox and LoRa

• Remote sensors in logistics and agriculture

• Industrial telemetry and control systems

Devices are classified as Low-Power Data Communication Systems under Article 6 of the Radio Law Enforcement Regulations.

Frequency Range and Channelization

• Operating Band: 920.6 – 928.0 MHz

• Channel widths: Narrowband (e.g. 200 kHz) or ultra-narrowband depending on protocol (see Channel Bandwidth)

• Specific sub-bands may be allocated based on application type or transmission duty cycle

Power Limits

• Maximum Effective Isotropic Radiated Power (EIRP): Typically 20 mW (13 dBm)

• Lower power may be required for higher duty cycle transmissions

• Duty cycle restrictions apply to minimize interference with other users in the band

Certification and Labeling

All devices must be tested and certified by a Registered Certification Body (RCB). Approved devices must display the Giteki mark with the assigned certification number.

For support with testing and approval, see our → MIC Certification Services.

Note
A comprehensive overview of device categories, certification process, and Giteki marking can be found in the guide → MIC Requirements – Overview.