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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>10.5.5 Implementing Timers</TITLE><META NAME="description" CONTENT="10.5.5 Implementing 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="node111.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node111.html"><LINK REL="up" HREF="node107.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node107.html"><LINK REL="next" HREF="node113.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node113.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html3024" HREF="node113.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node113.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html3018" HREF="node107.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node107.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html3014" HREF="node111.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node111.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html3020" 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="tex2html3022" 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="tex2html3025" HREF="node113.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node113.html">10.6 Creating a New</A><B> Up:</B> <A NAME="tex2html3019" HREF="node107.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node107.html">10.5 Examples: Tcp, TCP</A><B> Previous:</B> <A NAME="tex2html3015" HREF="node111.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node111.html">10.5.4 Processing Responses at</A>   <B> <A NAME="tex2html3021" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html3023" 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="SECTION03755000000000000000"></A><A NAME="sec:tcptimer"></A><BR>10.5.5 Implementing Timers</H2><P>As described in the following chapterChapterchap:timers, specifictimer classes must be derived from an abstract baseTimerHandler../ns-2/timer-handler.hdefined in timer-handler.h. Instances of thesesubclasses can then be used as various agent timers.An agent may wish to override the []Agent::timeout method(which does nothing).In the case of the Tahoe TCP agent, two timers are used:a delayed send timer <TT>delsnd_timer_</TT> and a retransmission timer <TT>rtx_timer_</TT>.We describe the retransmission timer in TCPSectionsec:timerexampleas an example of timer usage. <P><BR><HR><ADDRESS>2003-09-23</ADDRESS></BODY></HTML>⌨️ 快捷键说明
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