Because WSNHA is intended for coverage of a small area, a rectangular Rzone does not reduce the routing overhead.
If the source and destination nodes are located at the edges of WSNHA, a rectangular Rzone is easily degraded to flooding in the entire network [29].
Yeah, it's an in-between.
"Yes, a proper, between-the-legs grope.
A fan-shaped Rzone is too narrow for WSNHA and does not include enough nodes to find a route, and it therefore easily leads to the failure of route discovery [29].
In this case, we decrease the radius of the Rzone, as a smaller route-searching space reduces the chance of collision problems in MAC 802.15.4.
The Rzone is a cylindrical zone, shown as the red dotted line in Figure 1, where it is assumed that the coordinates of,, and are, and, respectively.
Instead of blindly searching for the route in the entire network, WSNHA-LBAR uses the location information of the sensor nodes to confine the flooding route searching space to a smaller estimated request zone (Rzone), which represents the route-searched zone.
In algorithm, the static nodes located in the Rzone are responsible for rebroadcasting an RREQ, but the static nodes outside the Rzone are not responsible for rebroadcasting a RREQ.
So, we can view successful transmission as receiving an RREP when flooding RREQ in the current Rzone.
