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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>33.7.2 Adaptive Timers</TITLE><META NAME="description" CONTENT="33.7.2 Adaptive Timers"><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="previous" HREF="node452.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node452.html"><LINK REL="up" HREF="node451.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node451.html"><LINK REL="next" HREF="node454.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node454.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html8346" HREF="node454.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node454.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html8340" HREF="node451.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node451.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html8336" HREF="node452.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node452.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html8342" 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="tex2html8344" 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="tex2html8347" HREF="node454.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node454.html">33.7.2.0.1 Recompute for Each</A><B> Up:</B> <A NAME="tex2html8341" HREF="node451.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node451.html">33.7 Extending the Base</A><B> Previous:</B> <A NAME="tex2html8337" HREF="node452.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node452.html">33.7.1 Fixed Timers</A>   <B> <A NAME="tex2html8343" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html8345" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H2><A NAME="SECTION06472000000000000000">33.7.2 Adaptive Timers</A></H2><P>Agents using adaptive timer mechanismsmodify their request and repair parameters under three conditions(1) every time a new loss object is created;(2) when sending a message; and(3) when they receive a duplicate, if their relative distance to the loss is less than that of the agent that sends the duplicate.All three changes require extensions to the agent and the loss objects.The Agent/SRM/Adaptive../ns-2/srm-adaptive.tcluses SRM/request/Adaptive../ns-2/srm-adaptive.tcl andSRM/repair/Adaptive../ns-2/srm-adaptive.tclas the request and repair functions respectively.In addition, the last item requires extending the packet headers,to advertise their distances to the loss.The corresponding compiled class for the agent is theASRMAgent../ns-2/srm.h.<P><BR><HR><!--Table of Child-Links--><A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A><UL><LI><UL><LI><A NAME="tex2html8348" HREF="node454.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node454.html">33.7.2.0.1 Recompute for Each New Loss Object</A><LI><A NAME="tex2html8349" HREF="node455.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node455.html">33.7.2.0.2 Sending a Message</A><LI><A NAME="tex2html8350" HREF="node456.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node456.html">33.7.2.0.3 Advertising the Distance</A></UL></UL><!--End of Table of Child-Links--><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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