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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>17.1 Overview of satellite models</TITLE><META NAME="description" CONTENT="17.1 Overview of satellite models"><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="node199.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node199.html"><LINK REL="previous" HREF="node195.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node195.html"><LINK REL="up" HREF="node195.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node195.html"><LINK REL="next" HREF="node197.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node197.html"></HEAD><BODY ><!--Navigation Panel--><A NAME="tex2html4296" HREF="node197.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node197.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html4290" HREF="node195.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node195.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html4284" HREF="node195.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node195.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html4292" 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="tex2html4294" 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="tex2html4297" HREF="node197.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node197.html">17.1.1 Geostationary satellites</A><B> Up:</B> <A NAME="tex2html4291" HREF="node195.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node195.html">17. Satellite Networking in</A><B> Previous:</B> <A NAME="tex2html4285" HREF="node195.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node195.html">17. Satellite Networking in</A>   <B> <A NAME="tex2html4293" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html4295" HREF="node590.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node590.html">Index</A></B> <BR><BR><!--End of Navigation Panel--><H1><A NAME="SECTION031410000000000000000"></A><A NAME="sec:satellite_overview"></A><BR>17.1 Overview of satellite models</H1><P>Exact simulation of satellite networks requires adetailed modelling of radio frequency characteristics (interference, fading),protocol interactions (e.g., interactions of residual burst errors on the link with error checking codes), and second-order orbital effects (precession,gravitational anomalies, etc.). However, in order to study fundamentalcharacteristics of satellite networks from a <EM>networking</EM> perspective,certain features may be abstracted out. For example, the performance ofTCP over satellite links is impacted little by using an approximate rather than detailed channel model- performance can be characterized to first orderby the overall packet loss probability. This is the approach taken in thissimulation model- to create a framework for studying transport, routing, and MAC protocols in a satellite environment consisting ofgeostationary satellites or constellations of polar-orbiting low-earth-orbit (LEO) satellites. Of course, users may extend these modelsto provide more detail at a given layer. <P><BR><HR><!--Table of Child-Links--><A NAME="CHILD_LINKS"><STRONG>Subsections</STRONG></A><UL><LI><A NAME="tex2html4298" HREF="node197.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node197.html">17.1.1 Geostationary satellites</A><LI><A NAME="tex2html4299" HREF="node198.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node198.html">17.1.2 Low-earth-orbiting satellites</A></UL><!--End of Table of Child-Links--><HR><!--Navigation Panel--><A NAME="tex2html4296" HREF="node197.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node197.html"><IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="file:/usr/share/latex2html/icons/next.png"></A> <A NAME="tex2html4290" HREF="node195.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node195.html"><IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="file:/usr/share/latex2html/icons/up.png"></A> <A NAME="tex2html4284" HREF="node195.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node195.html"><IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="file:/usr/share/latex2html/icons/prev.png"></A> <A NAME="tex2html4292" 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="tex2html4294" 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="tex2html4297" HREF="node197.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node197.html">17.1.1 Geostationary satellites</A><B> Up:</B> <A NAME="tex2html4291" HREF="node195.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node195.html">17. Satellite Networking in</A><B> Previous:</B> <A NAME="tex2html4285" HREF="node195.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node195.html">17. Satellite Networking in</A>   <B> <A NAME="tex2html4293" HREF="node1.html" tppabs="http://www.isi.edu/nsnam/ns/doc/node1.html">Contents</A></B>   <B> <A NAME="tex2html4295" 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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