Dish Network RAN Engineer Interview Questions and Answers

Q1. What is HO? and its type? Events in HO
Ans. 
HO stands for Handover. It is a process of transferring an ongoing call or data session from one cell to another.
• There are two types of HO: Intra-cell HO and Inter-cell HO

• Intra-cell HO occurs when a mobile device moves from one channel to another within the same cell

• Inter-cell HO occurs when a mobile device moves from one cell to another

• Events in HO include HO Request, HO Access, HO Required, HO Command, and HO Complet
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Q2. Whats is MCR ?How we can improve MCR? What is the reason of MCR?
Ans. 
MCR stands for Maximum Cell Rate. It is the maximum rate at which cells can be transmitted through a network.
• MCR is an important parameter in ATM (Asynchronous Transfer Mode) networks.

• It is used to ensure that the network does not become congested.

• MCR is determined by the network operator and is based on the capacity of the network.

• Improving MCR can be done by increasing the capacity of the network or by optimizing the...read more
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Q3. Whats is CQI and MCS?
Ans. 
CQI stands for Channel Quality Indicator and MCS stands for Modulation and Coding Scheme.
• CQI is a feedback mechanism used in wireless communication systems to indicate the quality of the channel.

• MCS is a technique used to modulate and encode data for transmission over a wireless channel.

• CQI and MCS are used together to optimize the transmission rate and quality of wireless communication.

• Higher CQI values indicate bette...read more
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Q4. Whats is Volte call flow?
Ans. 
Volte call flow is the process of establishing and maintaining a voice call over a 4G LTE network.
• The call is initiated by the user and sent to the LTE network

• The network sends a SIP invite message to the called party

• The called party responds with a SIP 180 ringing message

• Once the call is answered, the network sends a SIP 200 OK message

• The voice call is established and maintained over the LTE network
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Q5. Whats is difference between cell throughput and user throughput?
Ans. 
Cell throughput refers to the amount of data transmitted by a cell, while user throughput is the amount of data received by a user.
• Cell throughput is the total amount of data transmitted by a cell, including data sent to all users within the cell.

• User throughput is the amount of data received by a single user within the cell.

• Cell throughput is affected by factors such as the number of users, signal strength, and availa...read more
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Q1. Whats is CA?and its types?ands its combinations?
Ans. 
CA stands for Carrier Aggregation. It is a technology used in LTE networks to combine multiple frequency bands for higher data rates.
• CA allows for faster data speeds by combining multiple frequency bands.

• There are two types of CA: intra-band and inter-band.

• Intra-band CA combines multiple carriers within the same frequency band.

• Inter-band CA combines carriers from different frequency bands.

• CA can be used in different co...read more
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Q2. Whats is interference?and its types with examples?
Ans. 
Interference is the unwanted signal that affects the quality of the desired signal.
• Interference can be caused by external sources such as other wireless devices, power lines, or natural phenomena like lightning.

• It can also be caused by internal sources such as reflections, multipath, or co-channel interference.

• Types of interference include thermal noise, crosstalk, adjacent channel interference, and intermodulation int...read more
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Q3. Reasons of low throughput and how will improve low throughout?
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Q4. What is SIB?and different types of SIB?
Ans. 
SIB stands for System Information Block. It is a type of message used in wireless communication systems.
• SIBs contain information about the network, such as cell identity, location area code, and frequency.

• There are different types of SIBs, including SIB1, SIB2, SIB3, SIB4, SIB5, SIB6, SIB7, SIB8, SIB9, SIB10, SIB11, and SIB12.

• SIB1 is the most important SIB, as it contains information about the cell identity, frequency,...read more
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Q1. Rssi , kpi, Nsb, dus to bbu migration
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Q2. Lte architecture ,lte frame
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Q3. Tdd ,fdd , half duplex and full duplex
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Q4. Call flow , scripts work
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Q1. Basic questions on antenna parameters.
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Q2. Design aspects of Antenna array.
Ans. 
Antenna array design involves elements such as element spacing, beamforming techniques, and array geometry.
• Element spacing determines the directivity and beamwidth of the array.

• Beamforming techniques like phase shifting and amplitude tapering help steer the beam in a desired direction.

• Array geometry, such as linear, planar, or conformal arrays, affects the radiation pattern and polarization.

• Antenna array design also co...read more
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Q1. Theoretical understanding on base station antenna.
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Q2. How will you get the tilt in the base station antenna?
Ans. 
The tilt in the base station antenna can be adjusted by physically changing the angle of the antenna.
• Tilt can be adjusted by loosening the bolts on the antenna mount and manually changing the angle of the antenna

• Specialized tools like tilt meters can be used to ensure the correct angle is achieved

• Remote electrical tilt (RET) systems can also be used to adjust the tilt of the antenna electronically
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Q1. Be honest with your years of experience. All information you share will be verified at the time of joining.
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Second round is aptitude test

Q1. Tel me about your company and introduce yourself
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Q1. Different n/w layers
Ans. 
Different network layers include physical, data link, network, transport, session, presentation, and application layers.
• Physical layer: responsible for transmitting raw bits over a communication channel

• Data link layer: responsible for error-free transfer of data between nodes on a network

• Network layer: responsible for routing data packets between networks

• Transport layer: responsible for reliable data transfer between a...read more
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Q1. Firewall works on what layers
Ans. 
Firewall works on multiple layers of OSI model
• Firewall operates on layers 3 (network layer) and 4 (transport layer) of the OSI model

• It can filter traffic based on IP addresses, ports, protocols, and other criteria

• Firewalls can also perform deep packet inspection to detect and block malicious traffic

• Examples of firewall software include Cisco ASA, pfSense, and Windows Firewall
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Q1. Your work experience three year work experience
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Q2. What is your work last company my work is team handling and site visit for work
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2G 3G 4G Technologies and Network Parameters & Electronics basics

Q1. What is 4G parameters and explain
Ans. 
4G parameters are settings that control the performance of a 4G network.
• 4G parameters include things like handover thresholds, power control settings, and modulation schemes.

• These settings can be adjusted to optimize network performance and improve user experience.

• Examples of 4G parameters include RSRP, RSRQ, SINR, and MCS.

• RSRP (Reference Signal Received Power) is a measure of the signal strength at the receiver.

• RSRQ (...read more
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Q2. What about knowledge of MS-Office please explain
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Q1. What are your salary expectations?
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Q2. What is your family background?
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Q3. Share details of your previous job.
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Q4. Why should we hire you?
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Q5. Why are you looking for a change?
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Q6. What are your strengths and weaknesses?
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Q7. Tell me about yourself.
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Q1. SIP,IMS,SS7,call flow of sip and ims,ip,
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Q2. FTTH questions,Ont ,bont pri, analog, bri
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Q1. Salary negotiation, reason for leaving current job, general interview questions
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