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<html><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><!--Converted with jLaTeX2HTML 2002 (1.62) JA patch-1.4patched version by: Kenshi Muto, Debian Project.LaTeX2HTML 2002 (1.62),original version by: Nikos Drakos, CBLU, University of Leeds* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan* with significant contributions from: Jens Lippmann, Marek Rouchal, Martin Wilck and others --><HTML><HEAD><TITLE>16.1.5.2 DSR</TITLE><META NAME="description" CONTENT="16.1.5.2 DSR"><META NAME="keywords" CONTENT="everything"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"><META NAME="Generator" CONTENT="jLaTeX2HTML v2002 JA patch-1.4"><META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css"><LINK REL="STYLESHEET" HREF="everything.css" tppabs="http://www.isi.edu/nsnam/ns/doc/everything.css"><LINK REL="next" HREF="node182.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node182.html"><LINK REL="previous" HREF="node180.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node180.html"><LINK REL="up" HREF="node179.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node179.html"><LINK REL="next" HREF="node182.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node182.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html4074" HREF="node182.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node182.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html4068" HREF="node179.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node179.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html4062" HREF="node180.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node180.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html4070" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html"><IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="file:/usr/share/latex2html/icons/contents.png"></A> <A NAME="tex2html4072" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="file:/usr/share/latex2html/icons/index.png"></A> <BR><B> Next:</B> <A NAME="tex2html4075" HREF="node182.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node182.html">16.1.5.3 TORA</A><B> Up:</B> <A NAME="tex2html4069" HREF="node179.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node179.html">16.1.5 Different types of</A><B> Previous:</B> <A NAME="tex2html4063" HREF="node180.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node180.html">16.1.5.1 DSDV</A>   <B> <A NAME="tex2html4071" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html4073" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H3><A NAME="SECTION031315200000000000000"></A><A NAME="sec:dsr"></A><BR>16.1.5.2 DSR</H3><P>This section briefly describes the functionality of the dynamic sourcerouting protocol. As mentioned earlier the <TT>SRNode</TT> is different fromthe <TT>MobileNode</TT>. The <TT>SRNode</TT>'s <TT>entry<BR>_</TT> points to theDSR routing agent, thus forcing all packets received by the node to be handed down to the routing agent. Thismodel is required for future implementation of piggy-backed routinginformation on data packets which otherwise would not flow through therouting agent. <P>The DSR agent checks every data packet for source-route information. Itforwards the packet as per the routing information. Incase it doesnot findrouting information in the packet, it provides the source route, if routeis known, or caches the packet and sends out route queries if route to destination is not known. Routingqueries, always triggered by a data packet with no route to itsdestination, are initially broadcast to all neighbours. Route-replies aresend back either by intermediate nodes or the destination node, to the source, if it can find routing info for thedestination in the route-query. It hands over all packets destined toitself to the port dmux. In <TT>SRNode</TT> the port number 255 points to a null agent since thepacket has already been processed by the routing agent. <P>See dsr directory and tcl/mobility/dsr.tcl for implementationof DSR protocol. <P><HR><!--Navigation Panel--><A NAME="tex2html4074" HREF="node182.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node182.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html4068" HREF="node179.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node179.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html4062" HREF="node180.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node180.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html4070" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html"><IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="file:/usr/share/latex2html/icons/contents.png"></A> <A NAME="tex2html4072" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html"><IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="file:/usr/share/latex2html/icons/index.png"></A> <BR><B> Next:</B> <A NAME="tex2html4075" HREF="node182.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node182.html">16.1.5.3 TORA</A><B> Up:</B> <A NAME="tex2html4069" HREF="node179.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node179.html">16.1.5 Different types of</A><B> Previous:</B> <A NAME="tex2html4063" HREF="node180.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node180.html">16.1.5.1 DSDV</A>   <B> <A NAME="tex2html4071" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html4073" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <!--End of Navigation Panel--><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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