[ns] Problem with chang channel

[robbin]

Hi,all

May I chang channel by time?

ex: 
  0~5
  $ns_ node-config -adhocRouting $val(rp) \
  .
  -channel $chan_1_ \
  
  5~10   
  $ns_ node-config -adhocRouting $val(rp) \
  .
  -channel $chan_2_ 

is it possible?

Robbin
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[ns] Please help me!About sctp multihoming on wireless

[robbin]

Hi

I tried to simulate sctp on ns-2.28.

I have readed the paper on 
http://www.lib.ncsu.edu/theses/available/etd-05162005-094333/.

According to The FAQS of the paper , I modified two parts.

1.$ns_ node-config -wiredRouting OFF 
2.commented out the line 
//Tcl::instance().evalf(\%s no-slot \%ld, name(), cl)
in classifier.cc

I created multihoming nodes(mobile node) in WLAN .

while i execute ... it can not work.

Then I configure the mobilenode using $ns_ node-config -multihome-core \

and

$MH addif $MH_if0

$MH addif $MH_if1

instead of

#$ns_ multihome-add-interface $MH $MH_if0

#$ns_ multihome-add-interface $MH $MH_if1

But Segmentation fault(core dump)  occur.

Before I have successed ... when use mobilenode without multihoming .

But when add multihoming,the data can't be transfer.

Please help me.

Thank you very much.

My script is as following.

#

Mac/802_11 set dataRate_ 11Mb ;# 802.11b data rate

==

# Define options
#
==

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/802_11 ;# MAC type

 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(nn) 1 ;# number of mobilenodes

 set opt(adhocRouting) DSDV ;# routing protocol

 set opt(x) 670 ;# x coordinate of topology

 set opt(y) 670 ;# y coordinate of topology

 set opt(seed) 0.0 ;# random seed

 set opt(ftp-start) 100.0

 set opt(cbr-start) 150.0

 set opt(stop) 250 ;# time to stop simulation

 # create simulator instance

 set ns_ [new Simulator]

 # set up for hierarchical routing

 $ns_ node-config -addressType hierarchical

 AddrParams set domain_num_ 3

 lappend cluster_num 2 1 1

 AddrParams set cluster_num_ $cluster_num

 lappend eilastlevel 1 1 2 1

 AddrParams set nodes_num_ $eilastlevel

 set tracefd [open msctp-out.tr w]

 set namtrace [open msctp-out.nam w]

 $ns_ use-newtrace

 $ns_ trace-all $tracefd

 $ns_ namtrace-all-wireless $namtrace $opt(x) $opt(y)

 # Here the topography object define

 set topo [new Topography]

 $topo load_flatgrid $opt(x) $opt(y)

 create-god [expr $opt(nn) + 2]

 #Here wired nodes

 set temp {0.0.0 0.1.0}

 for {set i 0} {$i  $num_wired_nodes} {incr i} {

 set W($i) [$ns_ node [lindex $temp $i]]

 }

 # Configure for ForeignAgent and HomeAgent nodes

 $ns_ node-config -mobileIP ON \

 -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 OFF \

 -macTrace ON

  set HA [$ns_ node 1.0.0]

 $HA random-motion 0

 # Position (fixed) for base-station nodes (HA  FA).

 $HA set X_ 1.

 $HA set Y_ 2.

 $HA set Z_ 0.

  # Configure a mobilenode

 $ns_ node-config -multihome-core \

 -wiredRouting OFF \

 -mobileIP OFF \

 -macTrace ON

 set MH [$ns_ node 0.0.0]

 set MH_if0 [$ns_ node 1.0.1]

 $MH addif $MH_if0

 #$ns_ multihome-add-interface $MH $MH_if0

 set fid_ 2

 set HAaddress [AddrParams addr2id [$HA node-addr]]

 [$MH_if0 set regagent_] set home_agent_ $HAaddress

 # movement of the Mobile Node

 $MH set Z_ 0.

 $MH set Y_ 2.

 $MH set X_ 2.

 # links between wired and BaseStation nodes

 $ns_ duplex-link $W(0) $W(1) 10Mb 5ms DropTail

 $ns_ duplex-link $W(1) $HA 5Mb 2ms DropTail

 $ns_ duplex-link-op $W(0) $W(1) orient down

 $ns_ duplex-link-op $W(1) $HA orient left-down

 # setup SCTP connections between a wired node and the MobileHost

 $ns_ node-config -mobileIP OFF

 set sctp1 [new Agent/SCTP]

 $sctp1 set class_ 2

 $ns_ multihome-attach-agent $MH_if0 $sctp1

 set sink1 [new Agent/SCTP]

 $ns_ attach-agent $W(0) $sink1

 $ns_ connect $sctp1 $sink1

 $sctp1 force-source $MH_if0

 $ns_ at 200.0 $sctp1 force-source $MH_if0

 $sctp1 set fid_ 1

 set ftp [new Application/FTP]

 $ftp attach-agent $sctp1

 $ftp set packet_size_ 1000

 $ftp set rate_ 1mb

 $ns_ at $opt(ftp-start) $ftp start

 $ns_ at $opt(stop).0 $HA reset;

 $ns_ at $opt(stop).0002 puts \NS EXITING...\ ; $ns_ halt

 $ns_ at $opt(stop).0001 stop

 $ns_ run

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[ns] Problem with AP signal strength and trigger function

[robbin]

Dear all:

I want to know where to get the signal strength that Mobile node receive 
from AP(wireless Access Point).
I need it for a threshold.
I know it could be found in mac directory,but i am not sure which file is 
correct.
Could anyone tell me where to catch the signal value? 
And then While current signal strength  default threshold
I want to inform tcp layer to trigger function.
But I don't know how lower layer to communicate with higher layer.
Is funcion call or sendmessage useful?
Please recommend me to slove the problems.

Thank you in advance
Robbin
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[ns] problem with eurane[umts module]

[robbin]

hi,all

i want to use umts module on ns-2.29.

But the patch file is updated to ns-2.28.

Could anyone help me or give me some suggestions?

Regards,Robbin
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