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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'"
]
}
],
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"display_name": "Python 2",
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},
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"version": 2
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython2",
"version": "2.7.11"
}
},
"nbformat": 4,
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|
