IEEE 802.15.4d-2009

802.15.4d-2009 is a standards document for the 802.15.4 family that defines an alternative physical layer extension to support the Japanese 950 MHz bands. In the context of communication, networking, and broadcast technologies, it helps align wireless design and evaluation around a specific regional spectrum environment. This makes the standard relevant for teams that need to understand the PHY implications of operating in that band, including compatibility, channel behavior, and implementation consistency.

About 802.15.4d-2009

As an amendment to IEEE 802.15.4, 802.15.4d-2009 focuses on extending the physical layer rather than redefining the broader networking stack. Its purpose is to provide requirements suited to the Japanese 950 MHz band, which can differ from other regional deployments in frequency planning and radio characteristics. For engineers and procurement teams, the document serves as a technical reference for evaluating whether a device or design is intended to meet the amendment’s PHY-specific expectations.

Where is 802.15.4d-2009 used?

This standard is most relevant in wireless equipment and systems designed for low-power communication in the Japanese 950 MHz range. Typical use cases may include embedded radio modules, networked sensors, industrial monitoring devices, and other communication products that rely on IEEE 802.15.4-based operation. It is especially useful where regional band support must be matched to the radio design, firmware configuration, and compliance testing approach for a specific deployment environment.

Importance in practice

In practice, 802.15.4d-2009 helps reduce ambiguity when selecting or verifying a radio design for the Japanese 950 MHz band. It supports more consistent compliance work, better specification control, and clearer testing against the intended alternative PHY. For product teams, that can lower integration risk and improve confidence that equipment performance matches the band-specific requirements. Because the standard is superseded, it is also useful as a reference point for legacy systems and documentation review.

• Alternative physical layer extension
• Japanese 950 MHz band support
• IEEE 802.15.4 family amendment
• Wireless device and module reference
• Legacy compliance and testing context