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{
"cells": [
{
"cell_type": "markdown",
"metadata": {},
"source": [
"# Chapter 21 : Cellular Radio"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 1 : pg 795"
]
},
{
"cell_type": "code",
"execution_count": 1,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Handoff time is 720.0 sec\n",
"Handoff time is 36.0 sec\n"
]
}
],
"source": [
" \n",
"# page no 795\n",
"# prob no 21.1\n",
"#calculate the hand off time\n",
"#given\n",
"v=100.;#in km/hr\n",
"# first convert speed into m/sec\n",
"v1=(100.*10**3)/3600;#in km/sec\n",
"#calculations and results\n",
"#part a)\n",
"r=10.**4;#in m\n",
"t=(2*r)/v1;\n",
"print 'Handoff time is',t,'sec'\n",
"#part b)\n",
"r=500;#in m\n",
"t=(2*r)/v1;\n",
"print 'Handoff time is',t,'sec'"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 2 : pg 807"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"a) The average traffic is 416.667 E\n",
"The peak traffic is 3333.333 E\n",
"b) The average traffic per cell is 3.472 E\n",
"The peak traffic per cell is 27.778 E\n"
]
}
],
"source": [
" \n",
"# page no 807\n",
"# prob no 21.2\n",
"#calculate the average and peak traffic\n",
"#given\n",
"N = 12\n",
"m = 120.\n",
"a = 20000.\n",
"th = 30.#in min/day this means\n",
"H = 0.5\n",
"tp = 10.\n",
"#calculations and results\n",
"#part a)Calculation of the average and peak traffic in erlangs for the whole\n",
"#system\n",
"# The average traffic is\n",
"T = a * H / 24\n",
"print 'a) The average traffic is',round(T,3),'E'\n",
"# The peak traffic is\n",
"T1 = (a * tp) / 60\n",
"print 'The peak traffic is',round(T1,3),'E'\n",
"#part b)Calculation of the average and peak traffic in erlangs for one cell\n",
"# The average traffic per cell is\n",
"t = T / m\n",
"print 'b) The average traffic per cell is',round(t,3),'E'\n",
"# The peak traffic per cell is\n",
"t = T1 / m\n",
"print 'The peak traffic per cell is',round(t,3),'E'\n",
"# part c)\n",
"# For average traffic at 3.47E, the blocking probability is much less than 1%,\n",
"# since the average no of call is much less than the no of channels. \n",
"#However, the blocking probability increases to just over 5%"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"## Example 3 : pg 816"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {
"collapsed": false
},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"The maximum distance between base and mobile is 36900.0 m\n"
]
}
],
"source": [
" \n",
"# page no 816\n",
"# prob no 21.3\n",
"#calculate the max distance\n",
"#given\n",
"tg=123.*10**-6;\n",
"c=3.*10**8;\n",
"#calculations\n",
"#The maximum distance between base and mobile is\n",
"d=c*tg;\n",
"#results\n",
"print 'The maximum distance between base and mobile is',d,'m'"
]
}
],
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"display_name": "Python 2",
"language": "python",
"name": "python2"
},
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},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython2",
"version": "2.7.11"
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|
