On Mon, Aug 10, 2015 at 10:34 AM, Mikael Abrahamsson <swm...@swm.pp.se> wrote: > Donald Eastlake posted this a few days ago: > > "- 802.11 does have a feature called GCR -- Groupcast With Retries, > which was part of the 802.11aa amendment, although it is not widely > implemented. It includes such features as a way for the AP to send > several multi-destination frames and then, using unicast, to poll > associated stations for a bit map of which of those frames they > correctly received (BlockAck) and a feature for the AP to > spontaneously transmit a multi-destination frame more than once > without causing confusion for improved reliability."
Okay... this is quite new and I am not sure it will solve all the multicast problems for 802.11. Neighbor discovery (both IPv6 and routing protocol) has potentially to deal with a lot of neighbors, some of them not even known to the transmitter. It also feels like a lot of consumed airtime to replace a multicast with a multicast and one unicast for each known neighbor. This could be dozens of media accesses. Henning Rogge _______________________________________________ homenet mailing list homenet@ietf.org https://www.ietf.org/mailman/listinfo/homenet
