📄 no ad-hoc routing agent (noah).htm
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<HTML><HEAD><TITLE>NO Ad-Hoc Routing Agent (NOAH)</TITLE>
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<H2>NO Ad-Hoc Routing Agent (NOAH)</H2></FONT><FONT
face="Helvetica, Arial, sans-serif">NOAH is a wireless routing agent that (in
contrast to DSDV, DSR, ...) only supports direct communication between wireless
nodes or between base stations and mobile nodes in case Mobile IP is used. This
allows to simulate scenarios where multi-hop wireless routing is undesired. NOAH
does not send any routing related packets.
<P>
<UL>
<LI>It has been updated (November 2003) to work with ns-2.26 and with
non-Mobile IP scenarios. (For older versions of ns-2, take a look at <A
href="http://www.informatik.uni-mannheim.de/informatik/pi4/projects/MobileIP/ns-extension/">http://www.informatik.uni-mannheim.de/informatik/pi4/projects/MobileIP/ns-extension/</A>
but this version does not contain the bugfixes for non-Mobile IP scenarios.)
<P></P>
<LI>Further update (April 2004) to allow static multi-hop routes. The routes
can be set up using the <TT>routing</TT> command which takes as parameters the
number of destinations and then as many tuples of destination and next hop
address. The following example sets up static routing for a line of nodes:
<TT><PRE># setup static routing for line of nodes
for {set i 0} {$i < $val(nn) } {incr i} {
set cmd "[$node_($i) set ragent_] routing $val(nn)"
for {set to 0} {$to < $val(nn) } {incr to} {
if {$to < $i} {
set hop [expr $i - 1]
} elseif {$to > $i} {
set hop [expr $i + 1]
} else {
set hop $i
}
set cmd "$cmd $to $hop"
}
eval $cmd
}
</PRE></TT></LI></UL><FONT face="Helvetica, Arial, sans-serif" color=#000099>
<H3>Step-by-step installation instructions for ns-2.26</H3></FONT><FONT
face="Helvetica, Arial, sans-serif">
<TABLE cellSpacing=0 cellPadding=10 bgColor=white border=0><!-- <tr valign="top" align="left"><th>file</th><th>changes</th> -->
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<TH>Makefile.in</TH>
<TD>add <TT>noah/noah.o \</TT> to OBJ_CC and <TT>tcl/mobility/noah.tcl
\</TT> to NS_TCL_LIB </TD></TR>
<TR vAlign=top align=left>
<TH>noah/noah.{h,cc}</TH>
<TD>add <A
href="http://icapeople.epfl.ch/widmer/uwb/ns-2/noah/noah.h"><TT>noah.h</TT></A>
and <A
href="http://icapeople.epfl.ch/widmer/uwb/ns-2/noah/noah.cc"><TT>noah.cc</TT></A>
to a new subdirectory noah/</TD></TR>
<TR vAlign=top align=left>
<TH>tcl/mobility/noah.tcl</TH>
<TD>add <A
href="http://icapeople.epfl.ch/widmer/uwb/ns-2/noah/noah.tcl"><TT>noah.tcl</TT></A>
to tcl/mobility/</TD></TR>
<TR vAlign=top align=left>
<TH>tcl/lib/ns-lib.tcl.h</TH>
<TD>line 191: add <TT>source ../mobility/noah.tcl</TT><BR>line 603ff: add <PRE> NOAH {
set ragent [$self create-noah-agent $node]
}
</PRE>line 768ff: add <PRE>Simulator instproc create-noah-agent { node } {
# Create a noah routing agent for this node
set ragent [new Agent/NOAH]
## setup address (supports hier-addr) for noah agent
## and mobilenode
set addr [$node node-addr]
$ragent addr $addr
$ragent node $node
if [Simulator set mobile_ip_] {
$ragent port-dmux [$node demux]
}
$node addr $addr
$node set ragent_ $ragent
return $ragent
}
</PRE></TD></TR></TBODY></TABLE></FONT></FONT></BODY></HTML>
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