IPv6 over IEEE 802.15.4 BOF (6lowpan) Tuesday, March 8 at 0900-1130 ============================= CHAIRS: Geoff Mulligan Nandakishore Kushalnagar Gabriel Montenegro AGENDA: Agenda Bashing 5m Problem Statement 25m 6LoWPAN: Overview, Requirements, Assumptions, Problems and Goals draft-kushalnagar-lowpan-goals-assumptions The original milestones targetted a WG last call on this document for February, which is not likely. Thus, this slot will hopefully arrive at closure to prepare for the WG last call. IPv6 over IEEE 802.15.4 30m Transmission of IPv6 Packets over IEEE 802.15.4 Networks draft-montenegro-lowpan-ipv6-over-802.15.4 Summarize the decisions taken and the technical approach. Finer details about framing, header compression and packet delivery in a mesh will benefit from the discussion. Security Discussion 20m No draft yet. The purpose is to put forth an initial description of the threat model and the potential solutions in order to better understand which IETF security mechanisms are relevant. Implementation Considerations 20m No draft yet. This slot will allow us to talk about how one would implement such a device. Although this does not directly reflect a document targetted for WG official status, it is important from the point of view of better understanding and sharing what actual "running code" might be like. Gap Discussion 20m No draft yet. The goal is to discuss what other desirable work items are missing from the current charter and how to address them. DESCRIPTION: Note: Given that there is not much precedent for this type of activity at the IETF, the text that follows is of an introductory nature. Hence, its objective is to give a general idea of the application area and motivations for the work. In particular, this section is not to be construed as detailing work items for the working group. That is done in the following section on the "Scope of the Working Group." Well-established fields such as control networks, and burgeoning ones such as "sensor" (or transducer) networks, are increasingly being based on wireless technologies. Most (but certainly not all) of these nodes are amongst the most constrained that have ever been networked wirelessly. Extreme low power (such that they will run potentially for years on batteries) and extreme low cost (total device cost in single digit dollars, and riding Moore's law to continuously reduce that price point) are seen as essential enablers towards their deployment in networks with the following characteristics: * Significantly more devices than current networks * Severely limited code and ram space (e.g., highly desirable to fit the required code--MAC, IP and anything else needed to execute the embedded application-- in, for example, 32K of flash memory, using 8-bit microprocessors) * Unobtrusive but very different user interface for configuration (e.g., using gestures or interactions involving the physical world) * Robustness and simplicity in routing or network fabric A chief component of these devices is wireless communication technology. In particular, the IEEE 802.15.4 standard is very promising for the lower (physical and link) layers. As for higher layer functions, there is considerable interest in using IP technology. Even though it is not currently IP-based, the ZigBee Alliance has related ongoing work. Accordingly, it is expected that the working group will coordinate and interact with it. The required work includes items in the following (incomplete) list: * IP adaptation/Packet Formats and interoperability * Addressing schemes and address management * Network management * Routing in dynamically adaptive topologies * Security, including set-up and maintenance * Application programming interface * Discovery (of devices, of services, etc) * Implementation considerations Whereas at least some of the above items are within the purview of the IETF, at this point it is not clear that all of them are. Accordingly, the 6LoWPAN working group will address a reduced, more focused set of objectives. Scope of 6lowpan: Produce "Problems Statement, Assumptions and Goals for IPv6 for LoWPANs" (draft-ietf-lowpan-goals-assumptions-xx.txt) to define the problem statement and goals of 6lowpan networks. Produce "Transmission of IPv6 Packets over IEEE 802.15.4 WPAN Networks" (draft-ietf-lowpan-ipv6-over-802.15.4-xx.txt) to define the basic packet formats and sub-IP adaptation layer for transmission of IPv6 packets over IEEE 802.15.4. This includes framing, adaptation, header compression, address generation and a simple but sufficient mechanism for ad hoc routing based on AODV. The working group will reuse existing specifications whenever reasonable and possible. The working group will also serve as a venue for ongoing discussions on other topics related to the more complete list outlined above. Additional related milestones may be added in the future via a rechartering operation. Goals and Milestones: MAR 2005 Working group last call on draft-ietf-lowpan-goals-assumptions-xx.txt APR 2005 Submit draft-ietf-lowpan-goals-assumptions-xx.txt to IESG for consideration of publication as Informational MAY 2005 Working Group Last Call on draft-ietf-lowpan-ipv6-over-802.15.4-xx.txt JUL 2005 Submit draft-ietf-lowpan-ipv6-over-802.15.4-xx.txt to IESG for consideration of publication as Proposed Standard