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Coder World Labs Interview Questions and Answers

Updated 5 Feb 2024
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Q1. How to improve DL throughout in good RF condition

Ans.

To improve DL throughput in good RF condition, optimize antenna tilt, increase sector capacity, and reduce interference.

  • Optimize antenna tilt to improve signal strength and reduce interference

  • Increase sector capacity by adding more carriers or using advanced modulation techniques

  • Reduce interference by identifying and mitigating sources of interference

  • Ensure proper network planning and optimization to maximize DL throughput

  • Use advanced technologies like MIMO and beamforming to...read more

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Q2. Check relation with inter & intra cell term point & anchor baseline

Ans.

The relation between inter and intra cell term point and anchor baseline is important in RF optimization.

  • Inter cell term point refers to the point where the signal from one cell ends and the signal from another cell begins.

  • Intra cell term point refers to the point within a cell where the signal quality starts to degrade.

  • Anchor baseline is a reference point used to measure the performance of a network.

  • The relation between these terms helps in optimizing the RF network by ident...read more

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Q3. How to improve BLER

Ans.

To improve BLER, optimize the radio network by adjusting parameters and improving coverage.

  • Optimize radio network parameters such as power control, handover parameters, and modulation schemes

  • Improve coverage by adding more base stations or adjusting antenna tilt and orientation

  • Reduce interference by identifying and mitigating sources of interference

  • Perform regular network audits and drive tests to identify and address issues

  • Upgrade hardware and software to support newer techn...read more

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Q4. How to solve handover & drop call

Ans.

Handover and drop call issues can be solved by optimizing network parameters, improving coverage and capacity, and troubleshooting hardware and software problems.

  • Optimize handover parameters such as handover margin, time-to-trigger, and hysteresis

  • Improve coverage by adding more base stations or adjusting antenna tilt and azimuth

  • Increase capacity by adding more carriers or sectors

  • Troubleshoot hardware issues like faulty cables or connectors

  • Troubleshoot software issues like inc...read more

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Q5. How to improve VDR

Ans.

VDR can be improved by optimizing network parameters and reducing interference.

  • Optimize antenna tilt and azimuth angles

  • Adjust transmit power levels

  • Reduce interference from neighboring cells

  • Implement advanced interference cancellation techniques

  • Use frequency hopping to avoid interference

  • Deploy more base stations to improve coverage

  • Upgrade network hardware and software

  • Perform regular network audits and optimizations

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Q6. RACH PROCEDURE

Ans.

RACH procedure is used for initial access to the network by a UE.

  • RACH stands for Random Access Channel.

  • UE sends a RACH preamble to the network to request access.

  • The network responds with a RACH response message.

  • RACH procedure is used for both uplink and downlink transmission.

  • Optimizing RACH parameters can improve network performance.

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More about working at Ericsson

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HQ - Stockholm, Stockholm County, Sweden
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