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Re[n+1]: [ns] MAC-TDMA & Wireless
Hello,
I also want to use TDMA as MAC but ns crash when I use it:
Program received signal SIGSEGV, Segmentation fault.
0x80bf827 in MacTdma::radioSwitch (this=0x85d9300, i=1) at
mac-tdma.cc:454
454 EnergyModel *em = netif_->node()->energy_model();
I use ns-2.1b7 under Linux SuSe 6.3
to configure my nodes i do the following:
1/ I create nodes from the wired domain:
2/ I create Base-stations
3/ I create mobile nodes
Rmq: if I use MAC/802_11 ns works fine.
---------- myscript.tcl ---------------
set opt(channels) "wireless_channel.tcl" ;# param�tres des liaisons
radio
set opt(sources) "sources.tcl" ;# traffic dans le r�seau
set opt(cp) "" ;# connection pattern file
set opt(sc) "scen-3-test" ;# node movement file.
set opt(x) 670 ;# x coordinate of topology
set opt(y) 670 ;# y coordinate of topology
set opt(seed) 0.0 ;# seed for random number gen.
set opt(stop) [lindex $argv 0] ;# time to stop simulation
set opt(nn) 3 ;# number of mobilenodes
set num_wired_nodes 3
set num_bs_nodes 1
puts "Loading wireless channels parameters. . ."
source $opt(channels)
puts "done"
if { $opt(x) == 0 || $opt(y) == 0 } {
puts "No X-Y boundary values given for wireless topology\n"
}
if {$opt(seed) > 0} {
puts "Seeding Random number generator with $opt(seed)\n"
ns-random $opt(seed)
}
# create simulator instance
set ns_ [new Simulator]
# set up for hierarchical routing
$ns_ node-config -addressType hierarchical
AddrParams set domain_num_ 2
lappend cluster_num 1
AddrParams set cluster_num_ $cluster_num
lappend eilastlevel 3 4
AddrParams set nodes_num_ $eilastlevel
# setup topography object
set topo [new Topography]
# define topology
$topo load_flatgrid $opt(x) $opt(y)
# Create God
set god_ [create-god $opt(nn)]
# create nodes from the wired domain
set temp {0.0.0 0.0.1 0.0.2}
for {set i 0} {$i < $num_wired_nodes} {incr i} {
set W($i) [$ns_ node [lindex $temp $i]]
$W($i) label "W $i"
}
# configure base stations nodes
$ns_ node-config -adhocRouting $opt(adhocRouting) \
-llType $opt(ll) \
-macType $opt(mac) \
-ifqType $opt(ifq) \
-ifqLen $opt(ifqlen) \
-antType $opt(ant) \
-propType $opt(prop) \
-phyType $opt(netif) \
-channelType $opt(chan) \
-topoInstance $topo \
-wiredRouting ON \
-agentTrace ON \
-routerTrace ON \
-macTrace ON
set temp {1.0.0 1.0.1 1.0.2 1.0.3} ;# hier address to be used for
wireless
;# domain
set BS(0) [$ns_ node [lindex $temp 0]]
$BS(0) random-motion 0 ;# mouvement pas al�atoire
$BS(0) label "BS0"
$BS(0) set X_ 5.0
$BS(0) set Y_ 2.0
$BS(0) set Z_ 0.0
# mobiles nodes
$ns_ node-config -wiredRouting OFF
for {set j 0} {$j < $opt(nn)} {incr j} {
set node_($j) [ $ns_ node [lindex $temp \
[expr $j+1]] ]
$node_($j) base-station [AddrParams addr2id \
[$BS(0) node-addr]]
$node_($j) label "MN $j"
}
# links
$ns_ duplex-link $W(0) $W(2) 1Mb 10ms DropTail
$ns_ duplex-link $W(1) $W(2) 1Mb 10ms DropTail
$ns_ duplex-link $W(2) $BS(0) 1Mb 10ms DropTail
$ns_ duplex-link-op $W(0) $W(2) orient left-down
$ns_ duplex-link-op $W(1) $W(2) orient right-down
$ns_ duplex-link-op $W(2) $BS(0) orient down
$ns_ queue-limit $W(0) $W(2) 15
$ns_ queue-limit $W(1) $W(2) 15
$ns_ queue-limit $W(2) $BS(0) 16
$ns_ queue-limit $BS(0) $W(2) 16
puts "Loading traffic info. . ."
source $opt(sources)
puts "done"
----- wireless_channel.tcl ----------
set opt(chan) Channel/WirelessChannel ;# channel type
set opt(prop) Propagation/TwoRayGround ;# radio-propagation
model
set opt(netif) Phy/WirelessPhy ;# network interface
type
set opt(mac) Mac/Tdma
set opt(ifq) Queue/DropTail/PriQueue ;# interface queue
type
set opt(ll) LL ;# link layer type
set opt(ant) Antenna/OmniAntenna ;# antenna model
set opt(ifqlen) 50 ;# max packet in ifq
set opt(adhocRouting) NOAH ;# routing protocol
Mac/Tdma set bandwidth_ 512Kb
# Initialize the SharedMedia interface with parameters to make
# it work like the 914MHz Lucent WaveLAN DSSS radio interface
Phy/WirelessPhy set CPThresh_ 10.0
Phy/WirelessPhy set CSThresh_ 1.559e-11
Phy/WirelessPhy set RXThresh_ 3.652e-10
Phy/WirelessPhy set Rb_ 2*1e6
Phy/WirelessPhy set Pt_ 0.28183815
Phy/WirelessPhy set freq_ 914e+6
Phy/WirelessPhy set L_ 1.0
Phy/WirelessPhy set bandwidth_ 1e5
----------------------------------------------
I already read the file in tcl/test: test-suite-wireless-tdma.tcl
but i don't see what is wrong in my script.
Can someone help me?
Xuan Chen wrote:
>
> Please refer to mac_tmda.{cc, h} for details. There is also a test suite
> for TDMA under ns/tcl/test.
>
> Hope it helps,
> -chen xuan
>
> On Tue, 24 Jul 2001 [email protected] wrote:
>
> > Thanks Xuan Chen,
> >
> > Can you tell me more or where I can get more information on this?
> >
> > Regards,
> > Terence
> >
> > Quoting Xuan Chen <[email protected]>:
> >
> > > We also have a simple preamble-based TDMA supported in ns.
> > >
> > > On Tue, 24 Jul 2001 [email protected] wrote:
> > >
> > > > Hi Seniors,
> > > >
> > > > Can I use TDMA as MAC in a wireless simulation? It seems to work but
> > > my
> > > > colleague told me that only 802.11 is supported in MAC.
> > > >
> > > > Regards,
> > > > Terence
> > > >
> > >
> > > --
> > > Xuan Chen
> > > USC/ISI
> > >
> > >
> >
> >
> >
> > Regards,
> > Terence
> > DSO/DS/IEP
> > DID 7727252
> >
>
> --
> Xuan Chen
> USC/ISI