Wimax Network Planning For Nablus City Prepared by
Wimax Network Planning For Nablus City Prepared by Muhammad Hoshiya Jawad ali Muhammad zidat Supervised by Dr. Jamal Khrousheh
Sponsored by
Objectives �design an optimum mobile and internet network based on Wi. MAX technology for nablus city �offer high speed internet access �a high quality mobile network based on Vo. IP technology. �To make us capable to deal with problems and to solve them with scientific approach and with engineering sense
Contents: v. Equipments used in the project. v Radio network palnning. v Radio network capacity. v Simulation of network phases.
Equipments used in the project: v Airspan hypermax-base station. Hyper. Max Base station Specifications: Mobile wimax Fixed wimax Frequency bands Channel size FFT Tx power(frequency band dependant) Maximum Ei. RP per sector Hyper. Max base station Yes yes 2. 3 GHz, 2. 5 GHz, 3. 3 GHz, 3. 5 GHz, 3. 7 GHz, 4. 9 GHz 20 MHz, 10 MHz, 7 MHz, 5 MHz, 3. 5 MHz, 1. 75 MHz 2. 48, 1024, 512, 256 Up to 40 d. Bm +63 d. Bm v Towers with different heights v Feeders with different sizes v Airspan Pro-ST and Easy-ST receivers.
Cont. Antennas : the antennas we used for our network are J 3301 x. D 00 dual polarity 3. 5 GHz WIMAX sector antenna. Antenna Specifications: Part number : J 3301 x. D 00 -xx. N Frequency range 3300 – 3800 MHz Gain (d. Bi) @ 3. 5 GHz 18 (60 o) , 16 (90 o) VSWR Polarization Azimuth beamwidth Elevation beamwidth Null Fill Sidelobe Superssion Front –to-back Ratio Dimension < 1. 8 : 1 Dual : Vertical and Horizantal 60 o or 90 o 7 o Down to -25 o > 30 d. B > 20 d. B 28” x 11” x 6” (711 x 279 x 152 mm)
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, suburban and rural. Capacity requirements Phase one 1 - Data traffic A – residential subscribers : 9000 residential users eachof 1 Mbps, with over subscription rate of 1: 20. B - Business subscribers: 1000 business users each of 2 Mbps, with over subscription rate of 1: 10. 2–Voice traffic: 40, 000 voice subscribers Phase two 1 - Data traffic A – residential subscribers : 18000 residential userseach of 1 Mbps, with over subscription rate of 1: 20. B - Business subscribers: 2000 business users each of 2 Mbps, with over subscription rate of 1: 10. 2 – Voice traffic: 100, 000 voice subscribers.
coverage requirements Cont. 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 d. Bm Estimation of SSdesign 1 - Outdoor = -79 d. Bm. 2 - Indoor = -73 d. Bm. 3 - deep Indoor = -58 d. Bm.
Radio network capacity
subchannelization
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 * 350*10^3 = 1. 225 Mbps for each sub-channel. For three sector base station the total capacity is (16 * 1. 225)*3 = 19. 6*3 = 58. 8 Mbps.
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,
the following table shows the bandwidth of one complete frame: Total bandwidth per second of call Ethernet protocol overhead per frame Other overhead per frame Voice sample size Frames per second Total overhead in bits per second Voice enconding 26 Bytes 40 Bytes 10 ms 100 (26+40)= 66 B/frame*100 =6600*8 bit/B =52800 bps G. 729 32 Kbps Total bandwidth per call 84. 8 Kbps Each user should have 25 m. Erlang 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.
Planning of nablus network
Simulation of Phase One Total traffic of all subscribers has been estimated to be as follows: For residential users: 9000*1 Mbps / 20 = 450 Mbps. For business users : 1000*2 Mbps / 10 = 200 Mbps. For voice users : 7. 632 *40000 = 305280 Mbit
From calculations we found that we need 13 base stations to meet our requirements.
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
Simulation of the second phase Total traffic of all subscribers has been estimated to be as follows: For residential users : 18000*1 Mbps / 20 = 900 Mbps. For business users : 2000*2 Mbps / 10 = 400 Mbps. For voice users : 7. 632 * 100, 000 = 763200 Mbit.
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 BTS’s to serve this phase So we add another 13 sites to the original 13 sites from phase one
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, outdoor, and poor signal levels.
And the following chart shows the comparison between phase one and phase two
Why Wi. MAX 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 Wi. MAX to serve large number of subscribers with minimum number of BS’s, with better quality and new services Current GSM network Previous study using GSM Wi. MAX network Number of base staions 80 20 26 Number of subscribers 100, 000 50, 000 100, 000
Thank you ?
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