Q21.
How many types of TILT present in Antenna and their jobs in network
coverage?
Ans.
There are two types of tilt in Antenna :
- Electrical Tilt- Used for adjust the beam length of antenna.
- Mechanical Tilt- Used for adjust the width of beam of antenna
Q22.
How many Testing Tools are used for network testing?
Ans.
There are some popular tools are used in network testing:
- Tems Investigation
- Azenqos
- Tems pocket
- Nemo
- XCALL etc.
Q23.
How many different-2 types of testing doing for network testing?
Ans.
There are two types of testing in site
(i)
Drive Test
1.
SCFT (Single Cell Functionality Testing)
2.
Cluster Drive Testing
(ii)
Survey testing.
(iii)
Banchmark testing.
(iv)
optimisation testing
Q24.
What is call initiation (connect) duration of CSFB and Volte?
Ans.
The mo-call initiation duration in CSFB is less than 4sec, and Volte
should be less than 1ms.
Q25.
What is Microwave? Why it is used in network?
Ans.
Microwave is the equipment used in a tower to make a wireless link
with another tower and its a wireless connectivity between two
eNBs.Microwave is the transmission of information by microwave radio
waves.Its work on line of sight principle and point to point
communication because their small wavelength. The bandwidth of
microwave is between 3 to 30GHz.and modulation is 1024 QAM to
2048QAM.
Q26.
How to check microwave visibility? And what is hop-to-hop?
Ans.
We are using some visibility check tools for checking two microwave
visibility in a clutter area.
Hop-by-hop
transport is a principle of controlling the flow of data in a
network. With hop-by-hop transport, chunks of data are forwarded from
node to node in a store and forward manner.
As
hop-by-hop transport involves not only the source and destination
node, but rather some or all of the intermediate nodes as well, it
allows data to be forwarded even if the path between source and
destination is not permanently connected during communication.
Q27.
How to reduce interference in LTE?
Ans.
when same freq superimposed each other and totally corrupt the data
signal waves.
The
interference could be reduce only by proper optimisation of near and
far sites. There are few points:
- Azimuth should be designed as per site clutter.
- Electrical tilt should be perfect in site and nearby sites also.
- Mechanical tilt should be perfect.
- Check swap in sites.
- Check blockage in sectors.
- And check PCI collision.
Q28.
What is difference between db power and dbm power?
Ans.
dB and dBm are common terms used when discussing cellular signal
strength and signal amplifier systems. But what exactly do these
terms mean?
dbm
–Decibels milliwatts or the amount of power an amplifier
or antenna can produce or how much signal is at a site. It is an
important measure when determining signal strength at a site. A
strong signal is usually around -70dBm or higher where a weak signal
is around -100dBm or lower.
dB – Decibel or
a relative number signifying the amount of increase or decrease
in signal. This is helpful when determining the amount of signal
strength of a particular amplifier system and how much signal will be
present when the system is installed. This can be determined by
adding the signal strength of a site plus the amount of gain or dB
from an amplifier. This will give the overall indoor cellular
strength.
Q29.
What is ping? And Latency required in LTE?
Ans.
Packet InterNet Groper (PING). A ping is nothing but a time duration
of server response. Latency. In LTE ping duration should be less than
30ms.
Q30.
What is KPI?
Ans.
key performance indicator
(KPI), it is used to check the performance of site radio
conditions.
KPI
is divided into 6 main parts 1. Accessbility, 2. Integrity, 3.
Mobility, 4. Retainability, 5. Availability and 6. Utilization.
The
purpose is to check the performance of Network. In the Optimization
process we have to check the KPI value to monitor and optimize the
radio network performance in order to provide better subscriber
quality or to achieve better utilization
of available radio
network resources.
Thanks for your support...
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