Transmission of IPv6 Packets over IEEE 802.15.4 Networks
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From: The IESG <firstname.lastname@example.org> To: IETF-Announce <email@example.com> Cc: Internet Architecture Board <firstname.lastname@example.org>, RFC Editor <email@example.com>, 6lowpan mailing list <firstname.lastname@example.org>, 6lowpan chair <email@example.com> Subject: Protocol Action: 'Transmission of IPv6 Packets over IEEE 802.15.4 Networks' to Proposed Standard The IESG has approved the following document: - 'Transmission of IPv6 Packets over IEEE 802.15.4 Networks ' <draft-ietf-6lowpan-format-14.txt> as a Proposed Standard This document is the product of the IPv6 over Low power WPAN Working Group. The IESG contact persons are Mark Townsley and Jari Arkko. A URL of this Internet-Draft is: http://www.ietf.org/internet-drafts/draft-ietf-6lowpan-format-14.txt
Technical Summary 6LoWPAN is specification describing how to utilize IPv6 on top of low power, low data rate, low cost personal area networks. These networks today being built using IEEE 802.15.4 standard radios. These radios have an extremely limited frame size which makes it necessary to define an adaptation layer to support link layer fragmentation and reassembly. Additionally since these networks utilize low power transmission it is necessary for the adaptation layer to support network layer mesh capabilities. This specification defines the header format for this adaptation layer. Working Group Summary During the working group last call on the format document, several minor problems were recognized related to the layout of the fields in the adaptation header. At that time, David Culler and Jonathan Hui presented a new header encoding that provided for a overall smaller header and also "fixed" the earlier problems. This new encoding, rather than relying on a single monolithic header, utilizes multiple smaller "stacked" headers (similar to IPv6). Jonathan presented this new encoding at the November IETF. There was some concern about such a significant change at that late date, but it was agreed that the working group would take a concentrated look at the proposal and also the impact on code complexity and implementation. The Chairs set a 1 month deadline to get feedback from the group and especially those organizations that had already started implementing the previous version of 6LoWPAN. Very shortly after the IETF meeting an implementation for parsing the new header was sent to the list and over the next couple of weeks the feedback from the group was generally positive. During this time the document editors published a new revision and we started a new WGLC. This final WGLC proceeded without any substantial comments to the document. Document Quality There are at least 6 independent implementations of this protocol being worked on and all concerns raised during the review and WGLC have been addressed. Geoff Mulligan is the Document Shepherd.