Page "IEEE 802.15" Paragraph 8

IEEE 802. 15. 4-2003 ( Low Rate WPAN ) deals with low data rate but very long battery life ( months or even years ) and very low complexity.

The standard defines both the physical ( Layer 1 ) and data-link ( Layer 2 ) layers of the OSI model.

The first edition of the 802. 15. 4 standard was released in May 2003.

Several standardized and proprietary networks ( or mesh ) layer protocols run over 802. 15. 4-based networks, including IEEE 802. 15. 5, ZigBee, 6LoWPAN, WirelessHART, and ISA100. 11a.