Hi Daniel, Thanks for the 16ng ND optimization excerpts. The 16ng IPv6-ND and 6lowpan ND draft share the same idea in this respect. In addition to increasing the router advertisement interval, it also proposes a choice to avoid periodic RA alltogether by using periodic soliciation technique. That way, periodic RA will not wake up all the nodes in the 6lowpan.
I see the default value for 802.16 network is about 18min for periodic RAs. -Samita On 12/5/07, Daniel Park <[EMAIL PROTECTED]> wrote: > This is a tip for understanding and referring how we can fat down NDP for > 6lowpan networks. In 16ng working group, we tried to live up with IEEE > 802.16 Idle/Sleep mode in conjunction with IPv6 NDP. Here is a RA > optimization results... > > Hope those efforts help... > > Daniel Park > Co-chair, 16ng working group. > > > 8.2. Router Advertisement > > The AR SHOULD send a number (configurable value) of router > advertisements as soon as the IPv6 link is established, to the MS. > The AR sends unsolicited router advertisements periodically as per > [RFC4861]. The interval between periodic router advertisements is > however greater than the specification in Neighbor discovery for > IPv6, and is discussed in the following section. > > 8.3. Router lifetime and periodic router advertisements > > The router lifetime SHOULD be set to a large value, preferably in > hours. This document over-rides the specification for the value of > the router lifetime in Neighbor Discovery for IP Version 6 (IPv6) > [RFC4861]. The AdvDefaultLifetime in the router advertisement MUST > be either zero or between MaxRtrAdvInterval and 43200 seconds. The > default value is 2 * MaxRtrAdvInterval. > > 802.16 hosts have the capability to transition to an idle mode in > which case the radio link between the BS and MS is torn down. Paging > is required in case the network needs to deliver packets to the MS. > In order to avoid waking a mobile which is in idle mode and consuming > resources on the air interface, the interval between periodic router > advertisements SHOULD be set quite high. The MaxRtrAdvInterval value > specified in this document over-rides the recommendation in Neighbor > Discovery for IP Version 6 (IPv6) [ RFC4861]. The MaxRtrAdvInterval > MUST be no less than 4 seconds and no greater than 21600 seconds. > The default value for MaxRtrAdvInterval is 10800 seconds. > > _______________________________________________ > 6lowpan mailing list > [email protected] > https://www1.ietf.org/mailman/listinfo/6lowpan > > _______________________________________________ 6lowpan mailing list [email protected] https://www1.ietf.org/mailman/listinfo/6lowpan
