> Since 15.4g has defined a MTU of 2047, is there still a need to use > 6lowpan-hc there?
I would very much think so. While reducing fragmentation is an important motivator for 6lowpan-hc in 802.15.4 networks, the significant packet size reductions are useful in any constrained network, as every byte actually sent and received: -- consumes power at both sender and receiver, -- increases the packet transmission time and this makes it subject to additional bursts of interference, reducing delivery probability, -- increases contention of the channel (which, in turn, also may cause interference). With the large headers used by IPv6 and the small payloads expected for 6lowpan applications (e.g., CORE's CoAP protocol), the ~30-40 byte per packet savings will be worth it in these environments even if the hazards of MTU-related fragmentation are going away. Gruesse, Carsten _______________________________________________ 6lowpan mailing list [email protected] https://www.ietf.org/mailman/listinfo/6lowpan
