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+{
+ "cells": [
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "# Chapter 23 : Paging and Wireless Data Networking"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 1 : pg 863"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 1,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "The no of pages transmitted in one min are 887.0\n"
+ ]
+ }
+ ],
+ "source": [
+ " \n",
+ "# page no 863\n",
+ "# prob no 23.1\n",
+ "#calculate the no of pages transmitted\n",
+ "#given\n",
+ "bit_rate = 512.;#ib bps\n",
+ "t=60.;#in sec\n",
+ "# preamble uses 576 bits\n",
+ "preamble=576.;\n",
+ "#calculations\n",
+ "bits_total = bit_rate * t;\n",
+ "usable_bits = bits_total - preamble;\n",
+ "# each batch has one 32-bits synchronizing codeword and sixteen 32-bit address codewords for a total of 17*32=544bits. Therefore\n",
+ "bits_per_batch= 17.*32;\n",
+ "batches_per_min = usable_bits / bits_per_batch;\n",
+ "addr=16;\n",
+ "addr_per_min = batches_per_min*addr;\n",
+ "#results\n",
+ "print 'The no of pages transmitted in one min are',round(addr_per_min)"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 2 : pg 864"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 2,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "The efficiency is 0.256 b/s/Hz\n"
+ ]
+ }
+ ],
+ "source": [
+ " \n",
+ "# page no 864\n",
+ "# prob no 23.2\n",
+ "#given\n",
+ "#calculate the efficiency\n",
+ "# For the given FLEX system \n",
+ "Wc=25*10**3;\n",
+ "bit_rate = 6400.;#in bps\n",
+ "#calculations\n",
+ "efficiency = bit_rate/Wc;\n",
+ "#results\n",
+ "print 'The efficiency is',efficiency,'b/s/Hz'"
+ ]
+ },
+ {
+ "cell_type": "markdown",
+ "metadata": {},
+ "source": [
+ "## Example 3 : pg 871"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 3,
+ "metadata": {
+ "collapsed": false
+ },
+ "outputs": [
+ {
+ "name": "stdout",
+ "output_type": "stream",
+ "text": [
+ "The minimum hopping rate is 320.0 Hz\n",
+ "The maximum hopping rate is 1600.0 Hz\n"
+ ]
+ }
+ ],
+ "source": [
+ " \n",
+ "# page no 871\n",
+ "# prob no 23.3\n",
+ "#calculate the min and max hopping rate\n",
+ "#given\n",
+ "# for the Bluetooth system\n",
+ "fh_max=1/(625*10**-6);\n",
+ "fh_min=1/(5*625*10**-6);\n",
+ "#results\n",
+ "print 'The minimum hopping rate is',fh_min,'Hz'\n",
+ "print 'The maximum hopping rate is ',fh_max,'Hz'"
+ ]
+ }
+ ],
+ "metadata": {
+ "kernelspec": {
+ "display_name": "Python 2",
+ "language": "python",
+ "name": "python2"
+ },
+ "language_info": {
+ "codemirror_mode": {
+ "name": "ipython",
+ "version": 2
+ },
+ "file_extension": ".py",
+ "mimetype": "text/x-python",
+ "name": "python",
+ "nbconvert_exporter": "python",
+ "pygments_lexer": "ipython2",
+ "version": "2.7.11"
+ }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}