1. Mesh Routing Optimization for 6LoWPAN Ki-Hyung Kim (Ajou University) and S. Daniel Park (SAMSUNG Electronics) IETF 6LoWPAN WG 65th, Dallas, Tx

2. 2 IETF 6LoWPAN WG 65 th, Dallas24 March 2006 Mesh Routing underneath to IPv6 Layer PHY 802.15.4 MAC Adaptation IPv6 Transport Application PHY 802.15.4 MAC Adaptation IPv6 Transport Application PHY 802.15.4 MAC Adaptation IPv6 Transport Application

3. 3 IETF 6LoWPAN WG 65 th, Dallas24 March 2006 LoWPAN Optimizations  Sub-IP Routing  Allows efficient header compression, smaller route tables  Use EUI-64 or 16 bit addresses  Use prot_type field to indicate AODV control messages instead of UDP ports  Utilization of 6lowpan characteristics  Use the route cost by utilizing the LQI of the 6LoWPAN PHY  Allow multiple schemes such as hop counts, aggregated LQI values, and minimum LQI value along a route  Hello messages are not used, instead use 802.15.4 link layer mechanisms such as ACKs, beacon responses, overhearing packets, etc  Use broadcast in the route discovery

4. 4 IETF 6LoWPAN WG 65 th, Dallas24 March 2006 LoWPAN Optimizations II  Minimize power consumption and complexity  Do not use the destination sequence number  Only destination Replies to RREQ by RREP  Do not use the local repair  Report back to the originator by RERR upon a link break  Do not maintain the precursorlist  Send RERR only to the originator of the data which caused the link break  Utilize Efficient RERR reporting  Reuse existing specs, such as AODV and DYMO, as much as possible

5. 5 IETF 6LoWPAN WG 65 th, Dallas24 March 2006 Summary  Feedback is welcome.