2. Content
Interactive learning to facilitate best practices for in-building wireless network
planning and design
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Passive material Technical Survey Guideline
3. Passive Material
Introduction with Passive Material
Coaxial cable received its name because it includes one physical channel that carries the signal surrounded -- after a layer of insulation -- by another concentric physical channel,
both running along the same axis. The outer channel serves as a ground. Many of these cables or pairs of coaxial tubes can be placed in a single outer sheathing and, with
repeaters, can carry information for a great distance.
Jumper cables is a smaller and more bendable corrected cable which is used to connect antennas and other components to network cabling. Jumpers are also used in base stations
to connect antennas to radio units. Usually the most bendable jumper cable diameter is lower than 1/2".
A leaky feeder is a coaxial cable that has small sections of its copper shielding stripped away to allow radio frequency (RF) signals to escape. Leaky feeders, which act as extended
antennas, are also called radiating cables. Leaky feeders are used in places where the actual structure makes RF communication difficult.
Coaxial Cable Jumper Cable Leaky Cable
4. Passive Material
Introduction with Passive Material
Cable Connector Cable Tray Antenna Support
A coaxial RF connector (radio frequency connector) is an electrical connector designed to work at radio frequencies in the multi-megahertz range. RF connectors are
typically used with coaxial cables and are designed to maintain the shielding that the coaxial design offers.
The SPB-RF Cable Tray System has a return flange on the sides and is designed with no sharp edges. The cable tray system features slot patterns allowing for optimal and
efficient positioning of equipment and easy access for cable ties and other fixings.
In radio engineering, an antenna is the interface between radio waves propagating through ...Antenna may refer broadly to an entire assembly including support structure,
enclosure (if any), etc. in .... An antenna counterpoise, or ground plane, is a structure of conductive material which improves or substitutes for the ground.
5. Passive Material
Introduction with Passive Material
The RF tap is basically a small antenna that is inserted into the main coaxial line, which couples a small portion of the tapped branch into the new branch. A typical
application for an RF tap would be to branch several antennas off of a local branch.
The directional coupler can be used in situations where a small amount of power needs to be drawn off a main branch. Directional couplers also come in a multitude of
values. With a coupler, most of the signal is transmitted to the “through” port while a small portion of the signal is transmitted to the “coupled” port. The method used to
couple the signal is different.
Splitter is a resistive network divider which use to break one input power into two or more outputs of equal power. There are two components to the splitter loss. The
first is the loss associated with actually splitting the signal into multiple outputs, and the second is the insertion loss due to ohmic (resistive) loss.
Coupler SplitterRF Tap
7. Technical Survey
Why technical survey for IBS Design:-
These are the Tools Required for IBS Survey
GPS
Digital Camera
Magnetic Compass
Binoculars / Measuring Tape
Net Monitoring Phone
Floor Plan of that Particular Site
The ultimate goal of a RF site survey is to supply enough information to determine the number and
placement of antennas that provides adequate coverage throughout the facility.
1. Drawing of the complete site: CW Responsibility
a) Indoor & outdoor layout, plan, elevation
b) existing equipment
c) antenna position, orientation, height
d) feeder path
e) Grounding position
f) Others
2. Proposed drawing of (after consultation with Deployment)
a) Feeder hole
b) Equipment layout
c) Indoor & outdoor ladder and ladder support accessories (if Needed)
d) Extended arm for vertical cable latching at tower (if Needed)
Deployment responsibility:
Provide existing antenna position feasibility
Proposed equipment position feasibility
Proposed feeder path feasibility
Assist following CW & Deployment responsibility:-
8. Guideline
Sites survey Steps for Indoor Solution
Building front View-1 picture
Collect GPS Co-ordinate at Roof
Study the building architecture, with the help of floor plans and guidance from Building authorities.
Understand the requirements need in terms of Coverage, Capacity, future Subscriber growth etc.
BTS Position selection (Radio point of view at Roof). If BTS position Basement area RRU Can be position middle of the building.
Collect picture BTS & RRU position.
Riser Position Selection (Middle of the building). Collect picture Riser Position.
Visit Floor with current layout plan, field data collect by net monitor & based on field data marked nominal Antenna position
(equipment position & feeder path), Collect picture floor Anterior / false ceiling/ fixed ceiling etc.
Note down all the present serving cell information like CELL ID, BCCH, Rx. Level, etc.
Total No of floor/ no of floor solution deploys/ Floor Name/ Company name/ no GP’s Subscriber etc.
Also note down the type of ceiling, whether pop cutting is required or not and availability of cable tray.
Identify if any future planning is required or not in case of under construction buildings.
9. THANK YOU
Indoor sites are built to cater capacity and coverage issues in indoor
compounds where outdoor macro site can’t be a good solution.
