2g dt introduction part 1
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Prepared byAhmed Montaser Sr.RNO EngineerMob: 01116368468E-mail: [email protected]
Drive Test Introduction
Prepared by Eng. Ahmed Montaser
1. Sites types.
2. Antenna Tilt & Azimuth.
3. Drive Test Tools
4. TEMS Windows
Drive Test Introduction
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Course Agenda
Palm Tree Site Green Field Site
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The different types of sites
Cow Site Monopole Site
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Micro Indoor site Micro outdoor Site
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Antenna Tilting
2) Electrical Tilting:
Drive Test Introduction
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Antenna Tilting: Direction of the antenna vertical beam.
Types of tilting:
- No Tilt: The vertical beam of the antenna is directed towards the horizon.- Down Tilt: The vertical beam of the antenna is directed lower the horizon. - Up Tilt: The vertical beam of the antenna is directed above the horizon.Types of Tilting:
1) Mechanical Tilting
1) Mechanical tilting :
2) Electrical tilting :
- With electrical down tilting, the main beam will be down tilted but the back lobe will not be up tilted so back lobe interference decreased. - With electrical tilting you can change the tilt of any band alone. So Electrical Tilting is better than Mechanical Tilting
Drive Test Introduction
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What is the better, Mechanical tilting or Electrical tilting …????
-With mechanical down tilting, the main beam will be down tilted but the back lobe will be up tilted that make interference. - With mechanical tilting you can’t change the tilt of one band alone.
Drive test tools
Drive Test Introduction
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What we need to make Drive Test
Drive Test Introduction
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Drive Test Software
Drive Test Introduction
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2G ( TEMS Windows )Drive Test Introduction
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Drive Test Introduction
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GSM Current channel
Time: Computer system time Cell Name: Serving cell name
CGI: Cell global identity Cell GPRS support: Yes or No [MCC MNC , LAC , CI ]
- MCC: Mobile Country Code Band: 900 / 900E / 1800 - MNC: Mobile network Code- LAC: Location Area code BCCH ARFCN: BCCH frequency - CI: Cell Identity
Drive Test Introduction
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TCH ARFCN: The Frequency that carry Traffic only.
BSIC: Base Station Identity Code
Channel Type: BCCH or TCH
Mode: idle / dedicated
Time Slot: Current time slot
Channel Codec: FR: Full rate HR: Half rate AMR: adaptive multi rate
Ciphering Algorithm: A5/1 for example.
Sub Channel Number: SDCCH is divided into 8 sub channels
Hopping Channel: Yes / No on the cell level.
Hopping Frequencies: Frequencies allocated in the hopping group.
MAIO (Mobile Allocation Index Number): On which frequencies call will start.
GSM Serving + Neighbors
Cell Name: Name of the serving cell and neighbor cellsBSIC: Base Station Identity Code BSICARFCN: Absolute Radio Frequency Number >> BCCH Carrier of the cellRx lev: Received signal strength - signal strength measured by the MS (dbm).
Drive Test Introduction
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Drive Test Introduction
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GSM Radio Parameters
Rx lev: Measured signal strengthRx Qual: Voice quality (0 > 7) depend on BER (bit error rate) FER (Frame Erasure Rate): Percentage of frames being dropped BER actual: (Number of bit errors / Number of bit transmitted) SQI: Speech Quality IndexMS Power control level: Power control,depend on network design. DTX: Discontinuous Transmission.TA: Timing advance (0 > 63)
GSM Hopping Channel & GPS
ARFCN: Traffic carriers.Rx Lev: measured signal strength of each carrier.C/I: Carrier to Interference ration
Drive Test Introduction
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Latitude & Longitude coordinates Altitude The height from the sea surface Satellites No. of served SatellitesSpeed The velocity of the car
How to open the 2G useful windowsDrive Test Introduction
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Map Window
This window let you see the real sites and your current position and you can add other map layers to give you more accurate view.
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How to open Map window and GPS windowDrive Test Introduction
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Events
It includes events such as: Call attempt, call established, call end, handover, dropped call, and blocked call.
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Cell FileWhat is the cell file and how to load it on the TEMS
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Cell file loading on TEMS
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Cell file with Google earth form
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DT tools connection
3) After that press the green box to connect all the tools
4) After that you will hear (Mobile Connected & Mobile connected & GPS Connected), you will find that the
Equipment configuration window converted to this window
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1) At first you should define the mobile to computer as a hardware
2) Then you will see the mobile on TEMS with this shape in the Equipment configuration window
Mobile properties
We can make RAT control to mobile to force it on any selected band (UMTS, GSM)
Drive Test Introduction
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Mobile properties
Also we can force the mobile from this window to lock on GSM 900 or GSM 1800 (DCS)
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Call Sequence windowFrom this window you can make the mobile make a short calls with it self with selected
duration and selected waiting time
Adjust the command sequence according to the DT needs as shown
Drive Test Introduction
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Types of Drive TestSingle Site Verification test.
Cluster Test.
Main Road Test.
Benchmarking Test
SWAP test.
Drive Test Introduction
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Types of Drive Test Single Site Verification Test.
• There are two kinds of single site verification tests:
2G verification.- Checking the handover between the sectors of the site.- Checking the handover (in & out) with the neighbors of the site.- Checking the coverage of each sector.
- Checking cross feeder.-Checking the capability to access on the internet-Checking the capability to download files to view the GPRS rate. (Optional)
Drive Test Introduction
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Types of Drive TestExample on Single Site Verification Test
Drive Test Introduction
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Types of Drive Test Cluster Test.
• This test is mainly achieved using two mobiles for 2G&3G.• For checking retain ability the command sequence is adjusted as follow:
•Infinity number of minutes. -call wait 10 to 15 sec.
• For checking accessibility the command sequence is adjusted as follow:•2 minutes per call.•call wait 10 to 15 sec.
Drive Test Introduction
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Types of Drive TestExample on cluster Drive Test (Aswan City)
Drive Test Introduction
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Types of Drive Test Benchmarking Test.
• This test is mainly used to compare between the qualities of service of each operator.
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Types of Drive TestExample on Benchmarking Drive Test (Aswan international road)
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Types of Drive Test Main Roads Drive Test.
• This test is mainly used to Avoid VIP complains and enhance the service in the important areas.
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Types of Drive TestExample on Main Roads Drive Test (26th July Bridge)
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Types of Drive Test SWAP Test.
• This test is mainly used in case of SWAP from vendor to vendor for one operator.
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Types of Drive TestExample on SWAP Test
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To be continued
Drive Test Introduction
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