Refer to Section 3.4 for routing protocol convergence times.
A non-responsive node can either be caused by 1) a failure in the
node, 2) a failed link on the path to the node, or 3) a moved node.
In the first two cases, the node can be expected to reappear at
roughly the same location in the network, whereas it can return
anywhere in the network in the latter case.
3.3. Scalability
Looking at the number of wall switches, power outlets, sensors of
various natures, video equipment, and so on in a modern house, it
seems quite realistic that hundreds of devices may form a home-
automation network in a fully populated "smart" home, and a large
proportion of those may be low-power devices. Moving towards
professional-building automation, the number of such devices may be
in the order of several thousands.
The routing protocol needs to be able to support a basic home
deployment and so MUST be able to support at least 250 devices in the
network. Furthermore, the protocol SHOULD be extensible to support
more sophisticated and future deployments with a larger number of
devices.