Dear all,
When I am trying to test the Ricean propagation model (after I have added it
to NS-2) using the following code I got the following error:
"can't read "propInstance_": no such variable
while executing
.
.
.
"$ns_ set propInstance_" ... "
Here is the code portion related to the error:
/**************************************************************
set val(chan) Channel/WirelessChannel ;#Channel Type
set val(prop) Propagation/Ricean ;# radio-propagation model
set val(netif) Phy/WirelessPhy ;# network interface type
set val(mac) Mac/802_11 ;# MAC type
set val(ifq) Queue/DropTail/PriQueue ;# interface queue type
set val(ll) LL ;# link layer type
set val(ant) Antenna/OmniAntenna ;# antenna model
set val(ifqlen) 50 ;# max packet in ifq
set val(nn) 2 ;# number of mobilenodes
set val(rp) DSDV ;# routing protocol
#set val(rp) DSR ;# routing protocol
set val(x) 500
set val(y) 500
# Initialize Global Variables
set ns_ [new Simulator]
set tracefd [open wireless_mitf.tr w]
$ns_ trace-all $tracefd
set namtrace [open wireless_mitf.nam w]
$ns_ namtrace-all-wireless $namtrace $val(x) $val(y)
# set up topography object
set topo [new Topography]
$topo load_flatgrid $val(x) $val(y)
#
set prop_inst [$ns_ set propInstance_]
$prop_inst MaxVelocity 2.5;
$prop_inst RiceanK 6;
$prop_inst LoadRiceFile "rice_table.txt";
***********************************************************************/
How can I solve such error? and why it has occurred?
Thanx
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