Hi, >> I'd be very interested if you had any thoughts on retrieving the >> link >> quality metrics. My understanding is that Contiki uses it for its >> Objective Function (both OF0 and ETX). > > Yes, RPL uses link-layer information (ETX). It uses it for both, OF0 > and MRHOF > (latter unfortunately named rpl-of-etx.c). Thanks for the information. It's true that the name is rather misleading.
>> In my SimpleRPL, I don't retrieve >> anything for now, because I haven't figured out a proper way to pass >> it >> to the userspace. > > I haven't even started thinking about that. But is the link-layer > information > really needed at the RPL DODAG root? SimpleRPL also aims to provide a RPL router function (i.e. node that doesn't act as the DODAG Root). > I thought the routes are installed by > DAOs which are sent by the non-root nodes (which are basing their > parent > selection on the link-layer information). The link-layer information > of the > DAO is not used AFAIK. Then there would be no need for passing it to > userspace. Yes, DAO are used to build the downward routes. DAO messages are sent to routers belonging to the DAO parent set (which is a subset of the DODAG parent set). The DODAG parent set is computed using the node's own rank and the rank of its neighbors. In the case of the OF0, the rank computation is influenced by the link quality (when available). Regards, Tony ------------------------------------------------------------------------------ Minimize network downtime and maximize team effectiveness. Reduce network management and security costs.Learn how to hire the most talented Cisco Certified professionals. Visit the Employer Resources Portal http://www.cisco.com/web/learning/employer_resources/index.html _______________________________________________ Linux-zigbee-devel mailing list Linux-zigbee-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-zigbee-devel
