node27.html

来自「用C++编写的GPRS协议栈源代码」· HTML 代码 · 共 54 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>End of a Up Slot</TITLE><META NAME="description" CONTENT="End of a Up Slot"><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="tex2html396" HREF="node28.html"><IMG WIDTH=37 HEIGHT=24 ALIGN=BOTTOM ALT="next" SRC="http://cbl.leeds.ac.uk/nikos/figs/next_motif.gif"></A> <A NAME="tex2html394" 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="tex2html388" HREF="node26.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="tex2html397" HREF="node28.html">Packet to be transmitted </A><B>Up:</B> <A NAME="tex2html395" HREF="node22.html">Psuedocode for Packet Processing </A><B> Previous:</B> <A NAME="tex2html389" HREF="node26.html">End of a Down </A><BR> <P><H2><A NAME="SECTION00135000000000000000">End of a Up Slot</A></H2><P><PRE><TT> <B>Comment:</B>  xxxxxxxxxxxxB<>Method:</B>		 upslotHandler(Event *e)<P><B>Comment:</B>		 An MS can transmit a packet if it has one scheduledfor transmission.<P><B>Action:</B>		 Restart upslot timer to clock the next slot<P>		Compare node_address with the BS_address<P>		 If node is an MS<P>				 Check if it has a packet to transmit in <TT>pktTx[up_slot_]</TT><P>				 if  <TT>pktTx[up_slot_]</TT> is not NULL<P>						 Start slot release timer, if IFQ is empty<P>						 Switch the radio ON<P>						 Pass the packet in <TT>pktTx[up_slot_]</TT> to <TT>tx_onto_PHY ()</TT><P>						 Free <TT>pktTx[up_slot_] </TT><P>		 Else do nothing<P>		 Increment upslot counter. Take care of wrap around.<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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