6LoWPAN Meeting 66 IETF Dallas Format Document changes July 11, 2006.

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Presentation transcript:

6LoWPAN Meeting 66 IETF Dallas Format Document changes July 11, 2006

Latest changes Optional Multicast Address mapping patterned after that of ethernet. –Full specification for a separate document –Only ok IF the format document specifies a functional (albeit not optimized) solution. –Should we pull it into this document? –Will doing so delay the format document? |1 0 0|DST[15]* | DST[16] | Created a new section on Addressing Modes. (reorganized existing text on mode)

Latest changes Added Mesh Broadcast or Multicast Delivery Field (currently 8 bits) |O|F| Hops Left |Sequence Number| Originator Address Final Destination Address

Latest changes Added address format section to IANA considerations to define unicast, multicast and reserved address formats. Range 1, Oxxxxxxxxxxxxxxx: The first bit (bit 0) SHALL be zero if the 16-bit address is a unicast address. This leaves 15 bits for the actual address. Range 2, 100xxxxxxxxxxxxx: Bits 0,1 and 2 SHALL follow this pattern if the 16-bit address is a multicast address. This leaves 13 bits for the actual multicast address. Range 3, 101xxxxxxxxxxxxx: This pattern for bits 0,1 and 2 is reserved. Any future assignment shall follow the policy mentioned above. Range 4, 110xxxxxxxxxxxxx: This pattern for bits 0,1 and 2 is reserved. Any future assignment shall follow the policy mentioned above. Range 5, 111xxxxxxxxxxxxx: This pattern for bits 0,1 and 2 is reserved. Any future assignment shall follow the policy mentioned above. Sundry editorial changes, spelling errors and typos fixed.

Already discussed in “rev 02” Already discussed in Dallas, just mislabeled as rev03, but for reference: –Interface Identifier derivation using 16-bit short addresses now using the PAN ID as well. –Word of caution on the transient nature of 16 bit short addresses. –Reassembly now also keying on destination and datagram_size. –Mesh delivery header now allowing mix of 16/64 bit addresses. This leaves 6 bits for hops_left (64 hops is plenty). –Clarified that all zero addresses must not be used (for either 16 or 64 bit formats).

Ready for Working Group Last Call? Is format document complete? Can one implement interoperable implementations? Even if they are not optimized.