INTRODUCTION

Distributed antenna systems (DAS) have attracted significant interest from cellular service providers in recent years. In DAS architecture, each antenna site has minimal equipment. Most of the components traditionally co-located with the antenna—the base-station or access point—are moved to a central facility that serves many antenna sites. A typical design uses optical fiber to move analog or digitized RF between the central facility and the remote sites.

DAS has been used to provide coverage in airports and convention centers and in tunnels and similar sites where there is no room for a full base-station at the antenna. DAS is now being considered for outdoor deployment in urban centers, and is evolving to use innovative wireless links to connect antenna sites to the central processing facility.

In-Building Solution

It is a process, where in we radiate adequate Mobile signals of one particular Network operator in that entire building.

In places like basement floors, higher floors of some high rise Buildings, Airports, Corporate offices, Hotels & Shopping malls we tend to get signals from different cell sites around the building, so subscriber mobile ping-pong from one cell site to another resulting in high CALL-DROPS & High BER (Rx Quality)

In some case when the subscriber base increases, the Network operator has difficulty in planning new BTS, so instead of deploying a Macro Site the operator uses a Micro BTS where in the signal from Micro BTS is distributed through out the building using Co-axial cables and distributed antenna system and as a result we will have uniform signal been radiated all through out the building providing an error free Network connection to all their valuable subscribers present in that building.

In the basement floors there will be absolutely no mobile signals present, so this problem also can be solved using a distributed antenna system in basement floors.

Network Problems inside Buildings

• High Call Drops - Above 4th or 5th floors (Due to Multi cell Hand over)
• High Bit Error Rate - Due to Multi-path propagation, Water refraction, Interference from other cell sites of same operator or other operators.
• No network Coverage - Basements, Ground Floors etc. ( Penetration loss)
• Subscriber base increases (if deployment of new BTS sites are not possible)

Types of RF Distribution Techniques
Distributed Antenna System
• Using passive components like (Splitters 2way, 3way, 4way, Couplers 6dB, 7dB, 10dB, 15dB, 20dB etc.)
• Using Active amplifiers (Line amplifiers etc.)
• Using CAT-5 Cable, Main Hub, Expansion Hub and Remote antenna unit (RAU’s)
Leaky Cable System
• Coupling loss
• Attenuation over distance need to be calculated

Implementation Process

• Indoor solution requirement confirmation and survey schedule in coordination with the customer and building authorities.
• Pre-Survey
• Coverage requirement discussion with Customers (RNP)
• Survey
• Detailed RF Design
     o Power Budget Calculations
     o System Diagram
     o Coverage Plan
     o Proposed Antenna Location
     o Antenna Location in Floor Plan
     o Measurement Results
• Design Submission for Approval
     o Installation, Planning Proposal
     o ACAD Drawings
     o Bill of Material
• Site Acquisition
• Implementation
• Site Acceptance Test
     o Antenna Line Acceptance
     o BTS Acceptance
     o Material & accessories Check list
     o Electrical works and grounding check list
     o RF signal check
• Transmission
• Integration
• Optimization
• RF Acceptance
• Site Handover

List of Tools
• RF Survey Tools
     o Nokia Phones with Net Monitor Software
     o TEM Light Tool
     o TEMS Transmitter Tool
     o GPS
     o Compass
     o Laptops
• Implementation Tools
     o Prep tool
     o Chamfer tool
     o Crimping tool
     o Quality Knife
     o Hack saw Frame & Blade
     o Shaping tool
     o Cutter
     o Spanner set
     o Screw driver set
     o Soft Hammer
• Testing Tools & Equipment
     o Bird SA 2500EX Site Analyzer
     o ANRITSU S331A Site Analyzer

As your in-building turn-key partner, MAFTEL Wireless provides services that guarantee the successful build-up of indoor coverage systems: Project Management, Site Survey, In-Building System Design, Procurement, Installation and Commissioning, Upgrade and Decommissioning, and Maintenance and Warranty. Our successful experience in various types of properties and buildings – hotels, hospitals, government buildings, and business complex – positions MAFTEL Wireless to meet all of your in-building coverage needs.

OUR IN-BUILDING SOLUTION TEAMS
In-Building Engineering Design Team
Our engineering team aims to provide the best implementation approach at the best economy for our clients. We are highly professional, focused and experienced in designing in-door coverage systems. All our design engineers have worked with mainstream technologies including GSM & CDMA. We have designed and implemented in-building Distributed Antenna Systems (DAS) for hotels, government buildings, warehouses and commercial buildings. We struggle to balance theoretical indoor RF signal propagation models and practical implementations.

In-Building Project Installation Team
Accountability, service and integrity are the priorities of our installation team. Our installers are highly trained, experienced in structured cabling. We have experience with large-scale implementation and provide excellent customer service with the highest standard of professionalism.

Project Management
Our experienced project managers engage themselves in every aspect of the in-building project - site survey, system design, procurement, installation, commissioning and acceptance. We work closely with all involved parties to ensure quality completion with minimum disruption to building tenants. We maintain single point of contact with our clients, building tenants, material suppliers and design team throughout the life-span of a project.

Site Survey
This first step is critical for a successful indoor system build-up, as site survey is the prelude to robust system design and an accurate budgetary quote. MAFTEL Wireless has a detailed and comprehensive site survey process that takes account of all contributing factors.

System Engineering Design
In-building coverage is different from that of outdoor macro-cell and subject to many factors including building material, location, and interior and exterior environment. With extensive experience and deep understanding of Distributed Antenna Systems (DAS), our design team will employ the best-in-class design methodologies and tools to ensure that your next in-building project is a huge success.

Procurement
MAFTEL Wireless has established strong relationships and strategic agreements with major component suppliers worldwide to ensure timely delivery of quality materials for in-building construction.

Installation and Commissioning
Our in-house installation engineers have a proven record of quality work, timeliness of delivery and willingness to go the extra mile to serve our clients’ needs. We’re also more than willing to work with any preferred contractors you may already have. Once the installation is completed, we’ll make sure the system specifications meet all FCC regulations and your requirements before commissioning the in-building system.

Upgrade and Decommissioning
Wireless networks are of a dynamic nature affected by a number of factors. Often times, in-building systems need to be upgraded or even decommissioned to reflect changes of macro cell sites or the buildings. MAFTEL Wireless anticipates such needs, and offers upgrade and decommissioning services on systems built by us or other companies.

Maintenance and Warranty
MAFTEL Wireless provides maintenance and warranty services to all in-building coverage systems whether they were installed. We take responsibility for the networks throughout their lifetime at very reasonable cost.