An Najah National University

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• An Najah National University
• Faculty Of Engineering
• Electrical Engineering Department
• Nablus-palestine
• 2010

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Wimax Network Planning For Nablus City

• Prepared by
• Muhammad Hoshiya
• Jawad ali
• Muhammad zidat
• Supervised by
• Dr. Jamal Khrousheh

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• Sponsored by

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Objectives

• design an optimum mobile and internet network
  based on WiMAX technology for nablus city
• offer high speed internet access
• a high quality mobile network based on VoIP
  technology.
• To make us capable to deal with problems and to
  solve them with scientific approach and with
  engineering sense

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Contents

• Equipments used in the project.
• Radio network palnning.
• Radio network capacity.
• Simulation of network phases.

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Equipments used in the project

• Airspan hypermax-base station .
• 
  HyperMax Base station
• Towers with different heights
• Feeders with different sizes
• Airspan Pro-ST and Easy-ST receivers.

Specifications HyperMax base station
Mobile wimax Yes
Fixed wimax yes
Frequency bands 2.3GHz, 2.5GHz, 3.3GHz, 3.5GHz, 3.7GHz, 4.9GHz
Channel size 20MHz, 10MHz, 7MHz, 5MHz, 3.5MHz, 1.75MHz
FFT 2.48, 1024, 512, 256
Tx power(frequency band dependant) Up to 40 dBm
Maximum EiRP per sector 63 dBm

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Cont.

• Antennas the antennas we used for our network
  are J3301xD00 dual
• polarity 3.5 GHz WIMAX sector antenna .
• 
  Antenna Specifications

Specifications Part number J3301xD00-xxN

Frequency range 3300 3800 MHz

Gain (dBi) _at_ 3.5 GHz 18 (60o) , 16 (90o)

VSWR lt 1.8 1

Polarization Dual Vertical and Horizantal

Azimuth beamwidth 60o or 90o
Elevation beamwidth 7o
Null Fill Down to -25o
Sidelobe Superssion Front to-back Ratio Dimension gt 30 dB gt 20 dB 28 x 11 x 6 (711 x 279 x 152mm)
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Radio network palnning.

• The radio network design requirements
  are related to coverage, capacity and services
  and they are specified for each area type dense
  urban, urban, suburban and rural.
• Capacity requirements
• Phase one
• 1- Data traffic
• A residential subscribers 9000 residential
  users eachof 1 Mbps, with over subscription rate
  of 120.
• B - Business subscribers 1000 business users
  each of 2 Mbps, with over subscription rate of
  110.
• 2Voice traffic 40,000 voice subscribers
• Phase two
• 1- Data traffic
• A residential subscribers 18000 residential
  userseach of 1 Mbps, with over subscription rate
  of 120.
• B - Business subscribers 2000 business users
  each of 2 Mbps, with over subscription rate of
  110.
• 2 Voice traffic 100,000 voice subscribers .

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Cont.

• coverage requirements
• Phase one
• the required percentage of the deep indoor and
  indoor coverage in this phase will be at least 70
  .
• Phase two
• the required percentage of the deep indoor and
  indoor coverage in this phase will be at least 75
  .
• Signal strength levels
• Required signal strength - 95 dBm
• Estimation of SSdesign
• 1- Outdoor -79 dBm.
• 2- Indoor -73 dBm.
• 3- deep Indoor -58 dBm.

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Radio network capacity
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subchannelization
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Cont.

• Capacity of a single base station
• The bandwidth for each sub-carrier is
  10.94 KHz , then, the bandwidth for each
  sub-channel will be
• 10.94 32
  350.08 KHz .
• For Airspan equipments, the capacity is
  simply 3.5 bit/Hz of the bandwidth, so, for 350
  KHz channel the capacity is
• 3.5 350103 1.225 Mbps
  for each sub-channel .
• For three sector base station the total
  capacity is
• (16 1.225)3
  19.63 58.8 Mbps .

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Earlang to bps conversion

• In order to complete the capacity
  estimations we needed to convert the unit earlang
  to bit per seconed
• For voice traffic, we have many
  algorithms for coding and compression of the
  voice samples, and here we will use G.729(A)
  algorithm .
• For G.729(A) coding algorithm, the
  frame duration is 10 ms as shown in the figure
  below
• Number of frames in one second 1/
  (10 10-3) 100 Frames,

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• the following table shows the bandwidth of one
  complete frame
• 
  Total bandwidth per second of call
• Each user should have 25 mErlang
  of capacity, which are equivalent to 90 seconds,
  from the table above each second is 84.8 Kbit of
  traffic, So, 90 seconds equal to
• 90 84.8 7632 Kbit 7.632 Mbit.

Ethernet protocol overhead per frame Other overhead per frame Voice sample size Frames per second Total overhead in bits per second Voice enconding Total bandwidth per call


26 Bytes 40 Bytes 10 ms 100 (2640) 66 B/frame100 66008bit/B 52800bps G.729 32 Kbps 84.8 Kbps

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Planning of nablus network
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Simulation of Phase One

• Total traffic of all subscribers has been
  estimated to be as follows
• For residential users 90001 Mbps / 20 450
  Mbps.
• For business users 10002 Mbps / 10 200
  Mbps.
• For voice users 7.632 40000 305280
  Mbit

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• From calculations we found that we
  need 13 base stations to meet our requirements.

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• From this map we calculate the
  percentage of the coverage , the following figure
  show the results with respect to the area of
  Nablus which is 25.397 km²

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Simulation of the second phase

• Total traffic of all subscribers has
  been estimated to be as follows
• For residential users 180001 Mbps / 20 900
  Mbps .
• For business users 20002 Mbps / 10 400
  Mbps .
• For voice users 7.632 100,000
  763200 Mbit.

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As a result of increasing number of
subscribers in our operator , we need to improve
our network in both sides capacity and
coverage, to be able to serve all needs of
subscribers with high quality at all times. From
calculations we find that we need 26 BTSs to
serve this phase So we add another 13 sites to
the original 13 sites from phase one
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• By this distribution of sites our
  network meets the coverage and capacity
  requirements for the second phase,
• The chart bellow shows the percentage
  of deep indoor, indoor, outdoor, and poor signal
  levels.

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• And the following chart shows the
  comparison between phase one and phase two

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Why WiMAX network is superior the following
shows the difference between our network and the
currnt GSM network, and a previous study using
GSM tech., the table shows the ability of WiMAX
to serve large number of subscribers with minimum
number of BSs, with better quality and new
services
Current GSM network Previous study using GSM WiMAX network
Number of base staions 80 20 26
Number of subscribers 100,000 50,000 100,000
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Thank you

• ?