In terms of saving bits, supporting short addresses provides the biggest bang for the buck -- instead of carrying two 8-byte addresses across each hop (for a multihop pkt), carrying two 2-byte addresses saves 96 bits. Compared to this, the extra few bits spent on the version or the tag are minuscule.
While supporting 16bit short addresses are a great idea for saving bits in case of multihopping, the draft will need to consider the 64bit addresses as well. There will be some devices that will use 64bit link-layer addresses and stlll
want to do multihopping and fragmentation. I believe ZigBee devices also support 64bit addresses. -Samita _______________________________________________ 6lowpan mailing list [email protected] https://www1.ietf.org/mailman/listinfo/6lowpan
