node28.html

来自「用C++编写的GPRS协议栈源代码」· HTML 代码 · 共 58 行

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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><!--Converted with LaTeX2HTML 96.1 (Feb 5, 1996) by Nikos Drakos (nikos@cbl.leeds.ac.uk), CBLU, University of Leeds --><HTML><HEAD><TITLE>Packet to be transmitted onto the Air-Interface </TITLE><META NAME="description" CONTENT="Packet to be transmitted onto the Air-Interface "><META NAME="keywords" CONTENT="gprs"><META NAME="resource-type" CONTENT="document"><META NAME="distribution" CONTENT="global"><LINK REL=STYLESHEET HREF="gprs.css"></HEAD><BODY LANG="EN"> <A NAME="tex2html406" HREF="node29.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="http://cbl.leeds.ac.uk/nikos/figs/next_motif.gif"></A> <A NAME="tex2html404" HREF="node22.html"><IMG WIDTH=26 HEIGHT=24 ALIGN=BOTTOM ALT="up" SRC="http://cbl.leeds.ac.uk/nikos/figs/up_motif.gif"></A> <A NAME="tex2html398" HREF="node27.html"><IMG WIDTH=63 HEIGHT=24 ALIGN=BOTTOM ALT="previous" SRC="http://cbl.leeds.ac.uk/nikos/figs/previous_motif.gif"></A>   <BR><B> Next:</B> <A NAME="tex2html407" HREF="node29.html">Packet to be received </A><B>Up:</B> <A NAME="tex2html405" HREF="node22.html">Psuedocode for Packet Processing </A><B> Previous:</B> <A NAME="tex2html399" HREF="node27.html">End of a Up </A><BR> <P><H2><A NAME="SECTION00136000000000000000">Packet to be transmitted onto the Air-Interface </A></H2><P><PRE><TT> <B>Comment:</B>  xxxxxxxxxxxxB<>Method:</B>		 <TT>tx_onto_PHY ()</TT><P><B>Comment:</B>		 This is where the packet is actually passed down tothe physical layer.<P><B>Action:</B>		 Find packet transmission time<P>		 Assert that it is non-negative but less than <TT>slot_time_</TT><P>		Check if this is the PRACH and this is an MS<P>		If yes, check for collision on <TT>chan0_0</TT><P>		If collision<P>				 Change tt chan0_0 to <font size=-1><small>COLL</small></font><P>				 Increment <TT>coll_count</TT><P>				 Mark error in packet header<P>		 Check the MAC header subtype<P>		 If it is a <EM>resource_request</EM><P>				 Schedule the <TT>Wait timer</TT> for 1 TDMA frame<P>		 Start the <TT>pktTxTimer</TT><P>		 Pass the packet to <TT>downtarget_</TT><P></TT></PRE><BR> <HR><P><ADDRESS><I>Richa Jain (96D07007) <BR>Tue Jul 24 22:29:53 IST 2001</I></ADDRESS></BODY></HTML>

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