Analisa Model Propagasi Cost 231 Multi Wall pada Perancangan Jaringan Indoor Femtocell HSDPA menggunakan Radiowave Propagation Simulator

Penulisan Penelitian ini melakukan perancangan jaringan indoor HSDPA dan melakukan simulasi dari rancangan tersebut dengan menggunakan perangkat lunak yang berupa Radiowave Propagation Simulator (RPS). Sedangkan untuk menganalisa hasil perancangan maka dilakukan studi kasus yang berlokasi di gedung baru Kampus ST3 Telkom Purwokerto. Berdasarkan hasil analisa dan implementasi yang telah didapat hasil penelitian yang telah dilakukan maka jumlah FAP berdasarkan perhitungan kapasitas yaitu sebanyak 2 FAP. Sedangkan berdasarkan perhitungan cakupan (coverage) menggunakan Model Propagasi Cost 231 Multi Wall menghasilkan jumlah FAP sebanyak 2 FAP juga. Namun, dari kedua jenis perhitungan tersebut, perhitungan berdasarkan kapasitas lebih dipilih dari pada perhitungan berdasarkan cakupan untuk perancangan jaringan indoor di ST3 Telkom. Hal itu dikarenakan, perhitungan dengan kapasitas memperhitungan jumlah pengguna yang jumlahnya lebih padat yaitu untuk ruangan kelas T7. Jenis FAP yang digunakan pada penelitian ini ialah USC 5310 dengan daya pancar sebesar 20 dBm. Sehingga didapatkan Maximum Allowable Path Loss nya ialah 248,12 dB dari arah uplink dan 244,12 dB dari arah downlink. Sedangkan hasil dari composite coverage untuk skenario 1 adalah -27,25 dB, lalu pada skenario 2 menghasilkan composite coverage sebesar -26,60 dBm, dan hasil dari composite coverage pada skenario 3 yaitu -25,81 dBm. Sehingga dari hasil composite coverage yang didapat, maka skenario yang dipilih adalah skenario ke 3.

Kata Kunci—Jaringan indoor; HSDPA; Radiowave Propagation Simulator, Femtocell, Model Propagasi Cost 231 Multi Wall, RPS

Jurnal PDF File : http://adf.ly/1K5TCU

Software RPS :
http://rfoptimisation.blogspot.com/2015/06/radioplans-radio-propagation-simulator.html

Microwave Link Traffic Tutorial

a) Microwave Link connects two cellular network sites.
b) It carries two types of traffic: Voice and Data.
C) Commonly each BTS site has one E1 (2 Mbps) of transmission capacity.
d) PDH or SDH are the two standards for traffic capacity over Microwave Link in terms of E1. 2 x 2 (2E1), 4 x 2 (4E1), 8 x 2 (8E1), 16x 2 (16E1), STM1 etc.

E) PDH Transmission rates
E1-2 Mbps
E2-8 Mbps
E3-34 Mbps
E4-140 Mbps
E5-565 Mbps
f) SDH Transmission rates
STM-1-155.52 Mbps
STM-4-622.08 Mbps
STM-16-2488.32 Mbps
STM-64-9953.28 Mbps

Figure : Microwave Link Traffic

PCM Planning;
1) PCM planning is basically Capacity, Equipment & Network Topology planning.
2) Information required for PCM planning
a) Permit blocking possibility at various interfaces
b) Location of the equipment in the site and their configurations.
c) Current traffic load in the site.
d) About the LOS between the sites.
3) Capacity of a microwave link depends on the number of E1 (2Mbps) data carried from one site to another.

Topology Planning;
For cities < 4 sites
all hops shall be in a star topology employing 16×2 radios in 1+0 configuration.

Figure : Topology Planning

For cities >5 & <8 br="br" sites="sites">All hops shall be in a star topology employing 16×2 radios in 1+0 configuration.

Figure : Topology Planning

For cities >9 till 14 sites
PDH rings are considered for cities > 9 till 14 sites.

Figure : Topology Planning

For cities >15 till 28 sites
SDH rings are considered for cities > 15 to 28 sites.

Figure : Topology Planning

For cities > 29 to 6 sites
SDH rings are considered for cities > 29to 56 sites.

Figure : Topology Planning

For cities > 57 to 110 sites

Figure : Topology Planning

BoM
1) Inputs for Transmission Planning;
Count of new town and existing towns sites and the subscribers in each site.
From the above data, the number of BSCs required is to be calculated.
The final capacity for each route or link
2)Nominal Transmission Plan
Based on the above inputs, the planner should prepare the nominal connectivity plan by plotting all the new sites on the tool and BSCs can be fixed.
After nominal connectivity plan it is known how many 7GHz/15GHz/18GHz/23GHz links are required.
Based on the above the MW requirement can be given as BoM

Equipment Requirement;
1) Indoor/Outdoor Unit Estimation
Generally one BTS gives one E1.
The microwave hop would be about 20% over the number of BTS, for upgrade, last mile connectivity.
IDU should be 30% more than no. of MW hops.
2) Metro hub Estimation
Each Metro hub can cater for one 16E1 loop.
For dimensioning assume 6 – 8 BTS per Metro hub as some BTS may have more than 1E1. The Metro hub is configured with 1 FIU and 3 RRI cards.
In case of a mixed Microwave network and if the ring origination/termination hops at the BSC/hub site are non-Nokia, then the Metro hub configuration would be 3 FIU + 3 RRI.
3)  Each hop requires one or more antennas (with cable and accessories) as per diversity/protection configuration.

Microwave Antennae Installation Tutorial

 

Microwaves;
Microwaves are electromagnetic waves with frequencies ranging from 300 MHz to 300 GHz.
Frequency bands used for Microwave transmission are 7G/8G/11G/13G/15G/18G/23G/26G/32G/38G.
It is used for transmitting and receives the signals in point-to-point communication systems.

Figure : Microwave

Microwave Link;
Microwave links is used for transmitting and Receive high data capacity .Microwave is used instead of transmission lines.

Figure : Microwave Link

Microwave Link Installation consideration;
1) Line Of Sight
2) Fresnel Zone
3) Antenna height
4) Frequency band
5) Capacity
6) Modulation
7) Polarization
8) Antenna size
9) Trans and receive level
10) Orientation angle
11) Antenna alignment
12) Installation tools
13) Installation Material

Figure : Microwave Link Installation

Calculation of antenna diameter;
Calculation shows that 90 cm antenna is required.

Figure : Antennae Diameter

Approximately Hop Distances;

Figure : Hop Distance

Microwave Communication System components;
IDU, RF Unit, ODU, Microwave Antenna, IF cable, Pole for instillation.

Figure : Components used for Instillation

Free network planning & optimization tool

I would like to share with you a free network planning & optimization tool that support both MapInfo and Google Earth.

You can get a free copy at http://www.getxeus.com



Here are the list of supported features

• Visualize entire multi-vendor Network sites through MapInfo or Google Earth Mapping for 3D Visualization
  Network Tree feature to View detailed Cell Configurations & Parameter settings
  Network KPI Statistics import for plotting in MapInfo and Google Earth. Inclusive of Statistics trend and worst performance charts
  GSM, GPRS, EDGE, WCDMA, HSDPA, CDMA, WIMAX multi-band support
  Swift Network import from TEMS Cel File, GSM /WCDMA Parameter import from switch dumps
  Action Plan Creator tracks changes and produces change reports
  Cell Configuration Editor & add or remove Neighbor & Site options
  Smart Channel, Code & Neighbor Finder Including
  IRAT Neighbors
  Supports Bing Map feature from MapInfo (version 10.5 and above)
  Supports LTE for importing Network data using Xeus Interchange Format (xif)
  Supports new network dump files from Alcatel 2G,
  Nortel 3G and newer version of Nokia RNC, Huawei BSC and Huawei RNC
  Supports new Google Earth Plugin that allows embedded window viewing. Choose between Google Earth Plugin and Google Earth Desktop application
  Phyton Scripting gives users the power to script diagnostic Logic using the Script Editor View