[ns] about NDP for ZRP

[Batbold Toiruul]

hi guys,

Mac/802_11 set dataRate_ 1Mb

for {set i 0} {$i < $val(nn) } {incr i} {
     set r_($i) [$node_($i) set ragent_]
      $ns_ at 0.0 "$r_($i) radius 3.0"
     # @@@ $ns_ at 0.4 "$r_($i) beacon_period 12.0"
     # @@@ $ns_ at 0.0 "$r_($i) radius 1.0"
 }

could anyone tell what exactly is it doing, please? Is it discovering node's
neighbors?
How can I change the neighbor discovering protocol (NDP), and where do i
have to do it?

i am very appreciate for any response.

sincerely,
   Batbold