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Course Duration |
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3-day instructor-led training with case studies, 0900-1700 |
Course Objectives |
- Develop an understanding of what GSM is, its
overview and architecture
- Develop an appreciation of how GSM and related
technologies can be used to deliver value to customers
through proper indoor planning,
- Explore the linkages between technological capabilities
of GSM and the antenna systems sued for the optimum
performance for the same
- In building solutions
- In building design process including a case study and
indoor planning process and procedures and the final report.
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Course Overview |
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The goal of “Indoor Design and Planning for Mobile Networks”
is to present details and up-to-date information on the GSM
standard. The participants will learn about practical
performance and deployment issues specific to the GSM and
Indoor design standards. The processes, procedures and
protocols followed in the indoor design process. |
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Key Benefits |
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The participants will gain a detailed end-to-end knowledge
of the GSM technology, its benefits and potential pitfalls.
Furthermore, they will able to address real-world problems
of the indoor design deployment.
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Pre-Requisites for Participants |
A basic knowledge of wireless, IP and data communication
technology will be required. |
Who Should Attend? |
For engineers and managers responsible for the planning,
design, and operation of GSM networks and indoor design services |
Course Outline |
1. Overview
Why Indoor Network?
- Coverage everywhere - good network reputation
- Too expensive to increase the indoor location probability from outdoor sites
- Increasing the in-building Quality
- Increasing Capacity => High Indoor Frequency Reuse
Typical High Traffic Indoor Locations
- Office Buildings/Corporate Buildings
- Shopping Malls
- Hotels
- Airports
- Railway/Bus Stations
- Indoor Stadiums
2. RF Transmission Media
Distributed Antenna System
- Choose antennas that match to the environment - i.e. hard to spot!
- Install high enough - prevent desensitization
Leaky Cable
- Leaky cable is modified feeder cable which radiates the BTS signal into the
- Leaky cable creates cylindrical field around the cable
- Leaky cable provides uniform coverage
- Leaky cable is wideband
- Provides coverage also into location where the RF connection otherwise not
possible
- Cable could be installed both horizontal/vertical
- Cable can be split as normal distribution lines
- Cable can be terminated with terminator or standard antenna
Optical Fibre
- The total strand diameter for single mode fiber
- The ultra pure glass that forms the core transmission medium
- Low loss signal distribution within certain range
- Comparison between Different types
- Applications
- General Categorization
Distributed Antenna System
- Shopping Malls, Airports, etc
Leaky Cable
- Tunnels
Optical Fibre
- To be used when the cable runs are too long for a distributed antenna system
3. Link Budget Sample Calculation
4. Integrated Radio System
Introduction
- Integrated Radio System
- One common shared indoor system to accommodate Multi-Band Multi-Operator
-Use equipment that cover all bands (800MHz, 900MHz, 1800MHz)
Why?
- Too many antennas and cable inside the area
- Different operators have different equipment rooms, i.e. more space required
- Unfair environment to late comer
System Diagram
Point of Interconnect
POI Criteria
- Insertion Loss
- How much signal is attenuated?
- Power Handling
- Total power allowed
- Return Loss
- Isolation between ports
Inter-modulation
A nonlinear device
- Non-linear characteristics
- Active
- Passive
Inter-modulation Minimization
- Avoid active elements
- Isolation between Transmit and Receive antennas
Use band pass filters
- Filter out the IM products
5. Amplifiers
Gain and Output Power Rating
Gain
- Difference in output signal to input signal
- Selection of Gain is relative easy (30dB, 50dB, 80dB…etc)
Output Power
- The number of carriers to be amplified and output level
Noise Figures
- Every Amplifier produces noise
- Amplifier amplifying both the Signal and Noise
- The carrier-to-noise ratio (C/N)
6. Repeaters
Band Selective Repeater
- Two amplifiers, working in duplexed Operation
- It amplifies all signals within the selected frequency band
Channel Selective Repeater
- Repeater Restrictions
- Repeaters must be used in cells with good donor cell coverage
- The repeater must transmit and receive all frequency channels of the donor base
station
- Sufficient decoupling
Repeater Applications
7. Indoor Mapping
Indoor Positioning
- Walking path is a series of straight lines only
- All turns in walking paths must be planned and marked on floor plan
- Markers were placed in log file at the turning points
- Dummy co-ordinates created on the floor plan by using MapInfo
- Co-ordinates at turning points (markers) are measured off floor plan
- Co-ordinates inserted to log file utilizing time stamps and markers
- Signal Strength
- Timing Advance
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