We need to discuss this point urgently, and do the work to ask the IEEE for carve out some IE space for IETF/6TISCH if applicable.
On Thu, Jul 23, 2015 at 4:28 PM, Qin Wang <[email protected]> wrote: > Hi Pat, > > Since there are two approaches mentioned in the discussion, i.e. (1) > containing 6top-to-6top message in a specific payload IE (coapie), (2) > using the mechanism provided by IEEE802.15.9 to convey the 6top-to-6top > message, I would like to do more evaluation. I couldn't find the > IEEE802.15.9 spec on IEEE802 website. Can you tell me how to get it? > > Thanks > Qin > > > > On Tuesday, July 21, 2015 8:59 PM, Tero Kivinen <[email protected]> wrote: > > > This draft plans to put the coap messages directly on the payload IEs > in the 802.15.4. The problem is that we only have 16 payload IE types > in total for 802.15.4, so reserving one number for coap might be hard. > > On the other hand IEEE 802.15.9 needed to have solution to this same > problem, i.e how to multiplex upper layer data packet over 802.15.4 > frames and how to fragment them so they can fit on the 802.15.4 > frames. > > The 802.15.9 is split in two layers, first one is the multiplexed data > service, which takes 16-bit MultiplexId and the data packet to be sent > to the other end, and it will fragment and deliver it to the other > end. The MultiplexId is used to separate different protocols using > this mechanism. One of those protocols is the key management protocols > providing KMP for 802.15.4, which is the second part of the 802.15.9. > > Instead putting the coap messages in the payload IEs, it would > possible to allocate one MultiplexId for coap messages, and then coap > messages could be transmitted using multiplexing layer of 802.15.9. > This would also take care of fragmentting the messages (with PHY using > 127 octet PSDU, the maximum size of the data packet is around 24kB). > > The 802.15.9 recommended practice is already past the working group > letter ballots, and is starting its sponsor ballot soon. It is > expected to come out around the end of year. The draft will be > available on the ieee document store after the sponsor ballot starts, > i.e. very soon. > -- > [email protected] > > _______________________________________________ > 6tisch mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/6tisch > > > > _______________________________________________ > 6tisch mailing list > [email protected] > https://www.ietf.org/mailman/listinfo/6tisch > >
_______________________________________________ 6tisch mailing list [email protected] https://www.ietf.org/mailman/listinfo/6tisch
