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standard defines an upper layer interface to support and harmonize the
IEEE 802.15.4 ancillary functionality, e.g. fragmentation, protocol
differentiation and configuration.
standard defines an Upper Layer Interface (ULI) sublayer in Layer 2
(L2), between Layer 3 (L3) and the IEEE 802.15.4 Media Access Control
(MAC) sublayer. The ULI provides data and management service access
points (SAPs) for interface to the IEEE 802.15.4 MAC. The ULI adapts L3
protocols and provides operational configuration including network and
radio regulation requirements of the IEEE
802.15.4 MAC. Furthermore, the ULI integrates optional upper Layer 2
functionalities focused on interfacing to the IEEE 802.15.4 MAC such as
Key Management Protocols (KMPs), L2 routing (L2R) protocols, L2
fragmentation, and Internet Engineering Task Force (IETF) IPv6 over the
TimeSlotted Channel Hopping (TSCH) mode of IEEE Std 802.15.4 (6TiSCH)
Operation Protocol (6TOP). Finally, the ULI provides protocol
differentiation, using mechanisms such as EtherType Protocol
Differentiation (EPD) to support multiple, diverse higher layer
protocols, and header compression.
IEEE 802.15.4 devices have become widely deployed, deficiencies in the
IEEE Std 802.15.4 became apparent as an expanding set of applications
were addressed. To address these deficiencies numerous L2 protocols
were independently developed to interface to the IEEE 802.15.4 MAC
sublayer. These L2 protocols, such as KMP, L2R, and 6TOP often
replicate ancillary functionality, e.g. fragmentation and protocol
differentiation, in an inconsistent and often incompatible manner.
This project is needed to address these issues as an independent
standard for use with IEEE Std 802.15.4. It will define and organize
areas of operation that were intentionally left out of the IEEE
802.15.4 MAC in order to maintain simplicity and small size, but which
are now needed in a growing set of applications. Providing an
independent standardized approach eliminates the need for ad hoc work
arounds, enables consistent and compatible implementations where
needed, and generally makes IEEE Std 802.15.4 easier to use in an IP
environment without requiring any changes to the 15.4 standard itself.
Who to contact with
The Institute of
Electrical and Electronics Engineers, Inc.