path: root/Wireless_Communications_and_Networking_by_V._Garg/ch17.ipynb

{
 "metadata": {
  "name": "",
  "signature": "sha256:029905df97aa37359789733a28b442f75b82e79e7e96006449e39c092f0d4cca"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Chapter 17: Planning and Design of a Wireless Network"
     ]
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.1, Page 597"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration \n",
      "Susage=150.;#subscriber usage per month in mins\n",
      "days=24;#days per month\n",
      "busyhrs=6;#in a day\n",
      "BW=4.8*10**3;  #in kHz\n",
      "Freqreuse=4./12;#Frequency reuse plan\n",
      "chwidth=200; #in kHz\n",
      "subscriber=50000;#Present subscriber count\n",
      "Sgrowth=0.05;#Growth rate per year\n",
      "Area=500;  #in km\n",
      "BTScapacity=30; #in Erlangs\n",
      "N=4;  #Initial installation design years\n",
      " \n",
      "#Calculations&Results\n",
      "Erlangspersub=Susage/(days*busyhrs*60);\n",
      "print 'Average busy-hour traf\ufb01c per subscriber is %.4f Erlangs'%Erlangspersub;\n",
      "RFcarriers=BW/chwidth;\n",
      "RFcarrier_percell=RFcarriers/((Freqreuse**-1)*4); #freq reuse factor of 4\n",
      "\n",
      "#Assuming 2 control channels per cell\n",
      "CC=2;#control channels\n",
      "TC_percell=2*RFcarriers/3-CC;\n",
      "#Referring Erlang-B table in Appendix A\n",
      "print \"Referring Erlang-B table in Appendix A,Traf\ufb01c capacity of a GSM cell at 2% GoS for 14 channels = 8.2 Erlangs \"\n",
      "Tcapacity=8.2;# in Erlangs\n",
      "print \"There are 3 cells per BTS\"\n",
      "BTS=3;\n",
      "Traffic_perBTS=Tcapacity*BTS;\n",
      "print 'Traffic capacity per BTS is %.1f Erlangs'%Traffic_perBTS\n",
      "print \"Therefore, Traffic per BTS is less than BTS capacity(30 Erlangs)\"\n",
      "maxsubscriber=Traffic_perBTS/Erlangspersub;\n",
      "initialsub=subscriber*(1+Sgrowth)**N;\n",
      "BTS_perZone=initialsub/maxsubscriber;\n",
      "print 'The required number of base stations per zone are %d'%(round(BTS_perZone));\n",
      "cellRadius=(Area/(BTS_perZone*2.6))**0.5;\n",
      "print 'The hexagonal cell radius is %.1f km'%cellRadius;"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Average busy-hour traf\ufb01c per subscriber is 0.0174 Erlangs\n",
        "Referring Erlang-B table in Appendix A,Traf\ufb01c capacity of a GSM cell at 2% GoS for 14 channels = 8.2 Erlangs \n",
        "There are 3 cells per BTS\n",
        "Traffic capacity per BTS is 24.6 Erlangs\n",
        "Therefore, Traffic per BTS is less than BTS capacity(30 Erlangs)\n",
        "The required number of base stations per zone are 43\n",
        "The hexagonal cell radius is 2.1 km\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.2, Page 598"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration\n",
      "usage=150.; #subscriber usage per month in mins\n",
      "days=24;#Days in a month\n",
      "BHrs=6;#Busy hours per day\n",
      "BW=4.8;  #in MHz\n",
      "RFch=200;  #in kHz\n",
      "Psubscribers=50000;#present subscriber count\n",
      "growth=0.05;#subscriber growth per year\n",
      "rollover=4;#network roll over period\n",
      "NPCS=5;#Number of packet calls per session \n",
      "NPP=25;#Number of packets within a packet call \n",
      "Tr=120;#Reading time between packet calls(sec)\n",
      "NBP=480*8;#Packet size(in bits)\n",
      "Tint=0.01;#Time interval between two packets(sec)\n",
      "Ttot=3000;#Total packet service holding time\n",
      "BH_PS=0.15;#Busy hour packet sessions per subscriber\n",
      "Penetration=0.25;\n",
      "datarate=48;  #in kbps\n",
      "PTT=10;#Packet transmission time(sec)\n",
      "BTS=40;#NO of BTS sites\n",
      "\n",
      "#Calculations&Results\n",
      "Bitstx_duringPTT=NPCS*NPP*NBP/1000;   \n",
      "PST=PTT+Tr*(NPCS-1)+Tint*(NPP-1);\n",
      "PT_duringBH=BH_PS*Ttot/PST;\n",
      "Bits_persub_persec=Bitstx_duringPTT*PT_duringBH/(60*60);\n",
      "VoiceErlangs=usage/(days*BHrs*60);\n",
      "Initial_subscribers=round(Psubscribers*(1+growth)**rollover);\n",
      "Data_subscribers=Initial_subscribers*Penetration;\n",
      "Totalvoice=Initial_subscribers*VoiceErlangs;\n",
      "Voicetraffic_perBTS=Totalvoice/BTS;\n",
      "print 'Voice Traffic per Cell(sector) is %.2f Erlangs'%(Voicetraffic_perBTS/3);\n",
      "Totaldata=Data_subscribers*Bits_persub_persec;\n",
      "Datathroughput_perBTS=Totaldata/BTS;\n",
      "print 'Data throughput per Cell(sector) is %.2f kbps'%(Datathroughput_perBTS/3)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Voice Traffic per Cell(sector) is 8.79 Erlangs\n",
        "Data throughput per Cell(sector) is 15.50 kbps\n"
       ]
      }
     ],
     "prompt_number": 2
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.3, Page 600"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration\n",
      "Holdtime=120;#Average holding time during Busy Hours(in sec)\n",
      "Tx=3;# No of transreceivers\n",
      "TSsig=3;#No of TSs per cell for signaling\n",
      "RLC=0.80;#Radio link control efficiency\n",
      "Radioblocks=9000;#Total numbers of transmitted radio blocks\n",
      "TSdata=3;#TSs allocated for data traf\ufb01c per cell\n",
      "Datarate=15.5; #From eg 17.2\n",
      "Voicetraffic=8.82;  #From eg.17.2\n",
      "Duration=0.02;#Duration of block in sec\n",
      "\n",
      "#Calculations&Results\n",
      "DataEr=Radioblocks*Duration/Holdtime;\n",
      "print 'Data Erlangs = %.1f'%DataEr;\n",
      "TSuti=DataEr/TSsig;\n",
      "print 'Time Slot(TS) utilization = %.1f'%TSuti;\n",
      "Throughput=(Datarate/TSdata)*RLC;\n",
      "TScap=Throughput/TSuti;\n",
      "print 'TS capacity is %.2f kbps'%TScap;"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Data Erlangs = 1.5\n",
        "Time Slot(TS) utilization = 0.5\n",
        "TS capacity is 8.27 kbps\n"
       ]
      }
     ],
     "prompt_number": 3
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.4, Page 602"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "\n",
      "#Variable declaration\n",
      "Pt=36;#Base station transmitted power in dBm\n",
      "Pms=24;#mobile station transmitted power in dBm\n",
      "Nms=8;#mobile station noise figure in dB\n",
      "Nbs=5;#Base station nise figure in dB\n",
      "Ga=18;#Base station transmit and receive antenna gain in dBi\n",
      "Gm=0;#Mobile antenna gain in dBi\n",
      "SNR=12;# in dB\n",
      "Lc_TX=5;#BS transmit antenna cable, connector, and \ufb01lter losses in dB\n",
      "Lc_RX=2;#BS receiver antenna cable, connector, and \ufb01lter losses in dB\n",
      "Bodyloss=3;# Body losses at mobile\n",
      "fading=10.2;# in dB\n",
      "ThermalNoise=-174;# in dBm/Hz\n",
      "Gdiversity=5;#Antenna diversity gain at BS in dB\n",
      "#Assuming standard value of RF channel as \n",
      "RFch=200*10**3;  #in Hz\n",
      "\n",
      "#Calculations\n",
      "N=ThermalNoise+10*math.log10(RFch)+Nms;\n",
      "Smin=N+SNR;\n",
      "Smean=Smin+fading+Bodyloss;\n",
      "Lp=Pt-Lc_TX+Ga-Smean;\n",
      "N1=ThermalNoise+10*math.log10(RFch)+Nbs;\n",
      "Smin=N1+SNR-Gdiversity;\n",
      "Smean1=Smin+fading+Bodyloss;\n",
      "Lp1=Pms-Smean1+Ga-Lc_RX;\n",
      "R=10**((Lp1-133.2)/33.8);\n",
      "\n",
      "#Result\n",
      "print 'Cell radius is %.1f km'%R;"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Cell radius is 1.2 km\n"
       ]
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.5, Page 608"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration\n",
      "Ri=12.2*10**3;#Information rate in bps\n",
      "Rc=3.84*10**6;#Chip rate in cps(chips per second)\n",
      "Eb_Nt=4.;  #in dB\n",
      "Imargin=2.;  #Interference margin(3 dB)\n",
      "B=0.5;#Interference factor due to other cells\n",
      "Vi=0.65;#Channel activity factor\n",
      "\n",
      "#Calculations&Results\n",
      "Eb_Ntreqd=10**(Eb_Nt/10);\n",
      "LF_peruser=(1+B)*(1./(1+(Rc/Ri)*(1./Eb_Ntreqd)*(1./Vi)));  #M(no of users=1) in Eq 17.13\n",
      "print 'Cell load factor per voice user is %.5f'%LF_peruser;\n",
      "CellLoading=(Imargin-1)/Imargin;\n",
      "VoiceUsers=CellLoading/LF_peruser;\n",
      "print 'No of Voice Users are %d per cell'%VoiceUsers;\n",
      "#From EQ 17.6 assuming Power control efficiency=1\n",
      "Polecap=Rc/(Ri*Vi*(1+B)*Eb_Ntreqd);\n",
      "print 'Pole Capacity is %d'%Polecap;"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Cell load factor per voice user is 0.00774\n",
        "No of Voice Users are 64 per cell\n",
        "Pole Capacity is 128\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.6, Page 608"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration\n",
      "Eb_Nt=1.;  #in dB\n",
      "cellLoading=0.5;#Required interference margin(3 dB)\n",
      "B=0.5;#Interference factor due to other cells\n",
      "Vi=1;#Channel activity factor\n",
      "\n",
      "#Calculations\n",
      "Eb_Ntreqd=10**(Eb_Nt/10);\n",
      "#Assuming standard value of chip rate as 3.84Mcps\n",
      "Rc=3.84*10**6;#in cps(chips per second)\n",
      "Throughput=(cellLoading*Rc)/(Eb_Ntreqd*(1+B));\n",
      "\n",
      "#Result\n",
      "print 'Uplink Throughput is %d kbps'%(Throughput/1000);"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Uplink Throughput is 1016 kbps\n"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.7, Page 610"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration\n",
      "Ri=12.2*10**3;#Information rate in bps\n",
      "Rc=3.84*10**6;# Chip rate in chips per second\n",
      "Eb_Nt=4.;   # in dB\n",
      "Eb_Nt=10**(Eb_Nt/10);\n",
      "B=0.5;#Average interference factor due to other cells\n",
      "Zeta=0.6; # orthogonality factor\n",
      "Imargin=2.;#Interference margin(3 dB)\n",
      "Vi=0.65  #assuming Channel activity factor as 0.65\n",
      "\n",
      "#Calculations&Results\n",
      "Loadfactor_peruser=(Zeta+B)*(1./((Rc/Ri)*(1./Eb_Nt)*(1./Vi)))\n",
      "print 'Downlink cell load factor is %.4f'%Loadfactor_peruser;\n",
      "cellLoading=(Imargin-1)/Imargin;\n",
      "Voiceusers=cellLoading/Loadfactor_peruser;\n",
      "print 'No of voice users per cell are %d'%Voiceusers;"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Downlink cell load factor is 0.0057\n",
        "No of voice users per cell are 87\n"
       ]
      }
     ],
     "prompt_number": 7
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.8, Page 610"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "\n",
      "#Variable declaration\n",
      "N0=-174;#Noise density in dBm/Hz\n",
      "Bc=1.25;#Channel bandwidth in mHz\n",
      "Rc=1.2288;#Chip rate in Mcps\n",
      "Nf=6;  #Receiver Noise figure in dB\n",
      "Pt=27;  #Effective radiated power from mobile in dBm\n",
      "Lct=0.5;  #Transmitter cable and connector loss in dBm\n",
      "Lbody=1.5;#Body loss in dB\n",
      "Lcr=2;  #Receiver cable and connector loss in dB\n",
      "Mint=0;  #Interference margin in dB\n",
      "Mfading=2;#fast fadinf margin in dB\n",
      "Lpent=8;#Penetration loss in dB\n",
      "Gm=0;#Transmitter antennna gain in dBi\n",
      "Gb=12;#Receiver antenna gain in dBi\n",
      "Fm=8;#Fade margin in dB\n",
      "Eb_Nt=7;# in dB\n",
      "\n",
      "#Calculations\n",
      "Nth=N0+Nf;\n",
      "S_Nt=Eb_Nt+10*math.log10((Rc*10**6)/(Bc*10**6));\n",
      "Smin=S_Nt+10*math.log10(Rc*10**6)+Nth;\n",
      "Lpmax=(Pt-Smin)+(Gb+Gm)-(Lbody+Lct+Lcr+Fm+Lpent)-Mint-Mfading;\n",
      "\n",
      "#Results\n",
      "print 'Minimum signal power required is %.2f dBm'%Smin;\n",
      "print 'Maximum allowable path loss is %.2f dB'%Lpmax;"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Minimum signal power required is -100.18 dBm\n",
        "Maximum allowable path loss is 117.18 dB\n"
       ]
      }
     ],
     "prompt_number": 8
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.9, Page 612"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration\n",
      "Rc=3.84;#Chip rate in Mcps\n",
      "Ri=16;#Data rate in kbps\n",
      "UL=0.5;#UL loading factor\n",
      "DL=0.9;#DL loading factor\n",
      "Eb_NtU=4;#in dB\n",
      "Eb_NtD=6;# in dB\n",
      "Gm=0;#Mobile antenna gain in dBi\n",
      "Gb=18;#Base station gain in dBi\n",
      "\n",
      "#Calculations\n",
      "R=10**((139.65-138.5)/35.7);\n",
      "print 'Cell Radius is %.3f km'%R;\n",
      "Area=round(2.6*R**2);\n",
      "\n",
      "#Results\n",
      "print 'Area covered by hexagonal cell is %d km**2'%Area;\n",
      "print 'Number of BTSs required to cover an area of 2400 Km**2 are %d'%(2400/Area);"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Cell Radius is 1.077 km\n",
        "Area covered by hexagonal cell is 3 km**2\n",
        "Number of BTSs required to cover an area of 2400 Km**2 are 800\n"
       ]
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.10, Page 614"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration\n",
      "Rc=3.84;#chip rate in Mcps\n",
      "N=3.;#Noise rise in dB\n",
      "OF=0.8;#orthogonality factor\n",
      "B=0.55;#Interference from other cells \n",
      "Eb_N0=4.;#in dB\n",
      "Sec_Eff=0.85;#Sector efficiency\n",
      "Pwr_Eff=0.80;#Power control efficiency\n",
      "Y=1.2; #Retransmit rate\n",
      "X=10.; #10MB at 384Kbps\n",
      "X1=2.;  #2MB at 144Kbps\n",
      "X2=1.;  #1MB at 64Kbps\n",
      "\n",
      "#Calculations\n",
      "#Assuming Voice activity=Vf=1\n",
      "Vf=1;\n",
      "AvgDR=Y*X*10**6*(1./3600)+Y*X1*10**6*(1./3600)+Y*X2*10**6*(1./3600);\n",
      "CLoad=(N-1)/(N+1);\n",
      "DLcap=(Rc*10**6*Pwr_Eff*Sec_Eff)/(((10**(Eb_N0/10))*(B+OF)*Vf));\n",
      "Allowcap=CLoad*DLcap;\n",
      "users=Allowcap/AvgDR;\n",
      "\n",
      "#Result\n",
      "print 'NO of users that can be supported on the downlink of the WCDMA network are %d'%(round(users));"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "NO of users that can be supported on the downlink of the WCDMA network are 89\n"
       ]
      }
     ],
     "prompt_number": 10
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.11, Page 616"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration\n",
      "P1=1./2;#relative frequency of packets for user class1 \n",
      "P2=1./3;#relative frequency of packets for user class2\n",
      "P3=1./6;#relative frequency of packets for user class3\n",
      "R1=16; #data rate in kbps for P1\n",
      "R2=64; #data rate in kbps for P2\n",
      "R3=1024; #data rate in kbps for P3\n",
      "S1=16;#number of slots assigned to the R1 user\n",
      "S2=8;#number of slots assigned to the R2 user\n",
      "S3=2;#number of slots assigned to the R3 user\n",
      "\n",
      "#Calculations\n",
      "#Using Equation 17.20 from page no 616\n",
      "Ravg=(P1*R1*S1+P2*R2*S2+P3*R3*S3)/(P1*S1+P2*S2+P3*S3);\n",
      "# For equal latency, using Eq 17.18\n",
      "Rav=1./(P1/R1+P2/R2+P3/R3);\n",
      "# For Latency ratio=4, using Eq 17.19 from page no 616\n",
      "PL=4;\n",
      "C=(P1+P2+PL*P3)/(P1/R1+P2/R2+P3/R3);\n",
      "\n",
      "#Results\n",
      "print 'The average throughput for equal access condition is %.1f kbps'%Ravg;\n",
      "print 'The average throughput by considering equal latency is %.1f kbps'%Rav;\n",
      "print 'The average throughput by considering latency ratio as 4 is %.2f kkbps'%C\n"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "The average throughput for equal access condition is 58.2 kbps\n",
        "The average throughput by considering equal latency is 27.3 kbps\n",
        "The average throughput by considering latency ratio as 4 is 40.96 kkbps\n"
       ]
      }
     ],
     "prompt_number": 11
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.12, Page 620"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration\n",
      "Ec_Nt=-23.;#in dB\n",
      "DRC=-1.5;#DRC gain with respect to pilot in dB\n",
      "Tg=3.75; # Traf\ufb01c channel gain with respect to pilot in dB\n",
      "B=0.85;#Interference factor due to other cells \n",
      "\n",
      "#Calculations\n",
      "Mmax=(1./(1+10**(DRC/10)+10**(Tg/10)))*(1./((10**(Ec_Nt/10)*(1+B))));\n",
      "#The sector loading can be expressed as a fraction of the pole capacity Mmax. This is typically 70% of the pole capacity. \n",
      "M_allow=int(0.7*Mmax);\n",
      "#From table 17.2 we get Traffic channel rate as 9.6kbps since we are given traffic channel gain with respect to pilot as 3.75 dB\n",
      "Ri=9.6; #in kbps(see table 17.2)\n",
      "Tput=Ri*M_allow;\n",
      "\n",
      "#Result\n",
      "print  'Allowable reverse link throughput is %d kbps'%(round(Tput));"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Allowable reverse link throughput is 173 kbps\n"
       ]
      }
     ],
     "prompt_number": 12
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.13, Page 623"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import math\n",
      "\n",
      "#Variable declaration\n",
      "Ptmax=5.5;#Maximum transmit power of DSCH in watts\n",
      "Pbs=18;# Total base station power in watts\n",
      "alpha=0.2;#downlink orthogonality factor \n",
      "G=0.363;# geometry factor\n",
      "SF=16; #Spreading Factor for DSCH;fixed at value of 16\n",
      "\n",
      "#Calculations\n",
      "# Using equation no 17.27 given on page no 623\n",
      "SINR=SF*(Ptmax/(Pbs*(1-alpha+(1/G))));\n",
      "# In dB\n",
      "SINR_db=10*math.log10(SINR);\n",
      "\n",
      "#Result\n",
      "print 'The average SINR of HSDPA is %.4f dB(%.1fdB)'%(SINR,SINR_db);"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "The average SINR of HSDPA is 1.3753 dB(1.4dB)\n"
       ]
      }
     ],
     "prompt_number": 13
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.14, Page 624"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration\n",
      "Users=350;#no of users supported\n",
      "ExpectedTraf=1.8; # From section 17.7 (in Kbps)\n",
      "BHTraf=1.785;#Busy hour traffic in kbps\n",
      "BTS=180;\n",
      "\n",
      "#Calculations\n",
      "IubBW=(ExpectedTraf*Users*BHTraf)/1000;  # in Mbps\n",
      "TotalBW=BTS*IubBW;\n",
      "\n",
      "#Result\n",
      "print 'Required total bandwidth of Iub Interface is %.2f Mbps'%TotalBW;"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "Required total bandwidth of Iub Interface is 202.42 Mbps\n"
       ]
      }
     ],
     "prompt_number": 14
    },
    {
     "cell_type": "heading",
     "level": 2,
     "metadata": {},
     "source": [
      "Example 17.15, Page 625"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "#Variable declaration\n",
      "BTS=800.;#No of BTS sites\n",
      "Sec=3;#No of sectors per BTS\n",
      "freq_sec=2;#No of frequencies used per sector\n",
      "cellsRNC=1152;#Maximum capacity of cellRNC\n",
      "btsRNC=384;#One RNC can support btsRNC(BTSs)\n",
      "VE=25;#Voice service(mErl/subscriber)\n",
      "BRV=16;# bitrate Voice\n",
      "CS1=10;#CS data service 1(mErl/subscriber)\n",
      "BRC1=32;#bit rate for CS1 in kbps\n",
      "CS2=5;#CS data service 2(mErl/subscriber)\n",
      "BRC2=64;##bit rate for CS2 in kbps\n",
      "PSdata=0.2;#PS data service(kbps per subscriber)\n",
      "PSoverhead=0.15;\n",
      "SHO=0.4;#40%\n",
      "Totalsub=350000;#Total subsribers\n",
      "Maxcap=196;#Maximum Iub capacity of tpRNC (in Mbps)\n",
      "FR1=0.9;FR2=0.9;FR3=0.9;#Filler rates\n",
      "\n",
      "#Calculations&Results\n",
      "RNCreqd=(BTS*Sec*freq_sec)/(cellsRNC*FR1);#from eqn 17.28\n",
      "print 'using equation 17.28,Number of RNC required are %d'%(round(RNCreqd));\n",
      "RNC_reqd=BTS/(btsRNC*FR2);#from eqn 17.29\n",
      "print 'using equation 17.29,Number of RNC required are %d'%(round(RNC_reqd));\n",
      "RNCrequired=((VE/1000*BRV+CS1/1000*BRC1+CS2/1000*BRC2+(PSdata/(1-PSoverhead)))*(1+SHO)*Totalsub)/(Maxcap*1000*FR3);#from eqn 17.30\n",
      "print 'using equation 17.30,Number of RNC required are %d'%(round(RNCrequired));\n",
      "print 'We select first value which is %d RNCs'%(round(RNCreqd));"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "using equation 17.28,Number of RNC required are 5\n",
        "using equation 17.29,Number of RNC required are 2\n",
        "using equation 17.30,Number of RNC required are 1\n",
        "We select first value which is 5 RNCs\n"
       ]
      }
     ],
     "prompt_number": 15
    }
   ],
   "metadata": {}
  }
 ]
}