In 802.15.4, devices are categorized into RFDs and FFDs according to their capabilities. 802.15.4 also defines roles such as coordinator/PAN coordinator.

From an IP point of view, one might want to category devices into the following roles

WiredStubs may need specific kinds of L2 Mesh-Forwarder Nodes.

If L2 Mesh-Forwarder Nodes are allowed to be battery-operated devices, the PAN will need to use beacons; otherwise these nodes would have to have their receivers enabled all the time.

L2 Stub Nodes could be RFDs, could be battery-operated, and a goal would be to make them work at a 1 % to 5 % duty cycle of the receiver circuitry. This probably requires a modified NeighborDiscovery Protocol.

DeviceRoles (last edited 2008-02-20 14:57:21 by localhost)