Ericsson Network Engineer Interview Questions and Answers

Troubleshooting subscriber issues involves identifying and resolving network connectivity problems for individual users.

• Gather information about the issue from the subscriber

• Check network configurations and settings

• Perform network tests to identify the source of the problem

• Isolate the issue to determine if it is specific to the subscriber or a larger network problem

• Implement solutions to resolve the problem and ensure ...read more

4G architecture includes radio access network (RAN), core network, and user equipment (UE) with interfaces like S1, X2, and LTE-Uu.

• 4G architecture consists of Radio Access Network (RAN), Core Network, and User Equipment (UE)

• Interfaces used in 4G architecture include S1, X2, and LTE-Uu

• RAN connects UE to the core network, while X2 is used for communication between base stations

• LTE-Uu is the air interface between UE and b...read more

Improving throughput and SINR involves optimizing network conditions and configurations to enhance signal quality and data rates.

• Optimize antenna placement to reduce interference and improve signal strength.

• Implement MIMO (Multiple Input Multiple Output) technology to increase data throughput.

• Use advanced modulation techniques like QAM (Quadrature Amplitude Modulation) to enhance data rates.

• Reduce network congestion by...read more

PRB can be calculated by dividing the total available bandwidth by the bandwidth per PRB.

• Calculate total available bandwidth

• Determine the bandwidth per PRB

• Divide total available bandwidth by bandwidth per PRB to get the number of PRBs

OSS KPI knowledge involves understanding key performance indicators for network operations and service management.

• KPI stands for Key Performance Indicator, used to measure the effectiveness of network operations.

• Common OSS KPIs include network availability, mean time to repair (MTTR), and service response time.

• For example, a network availability KPI might measure the percentage of time the network is operational versus...read more

Load balancing can be done by distributing network traffic across multiple servers to ensure optimal resource utilization and prevent overload.

• Implementing a load balancer device or software

• Configuring load balancing algorithms such as round-robin, least connections, or IP hash

• Monitoring server health and adjusting traffic distribution accordingly

• Scaling resources up or down based on traffic demands

SD Congestion can be found by monitoring network traffic, analyzing performance metrics, and identifying bottlenecks.

• Monitor network traffic using tools like Wireshark or NetFlow

• Analyze performance metrics such as latency, packet loss, and throughput

• Identify bottlenecks in the network infrastructure, such as overloaded switches or routers

External interference can be removed by implementing shielding, using filters, adjusting frequencies, and improving signal strength.

• Implement shielding to block external signals from interfering with the network

• Use filters to eliminate unwanted frequencies that may cause interference

• Adjust frequencies to avoid overlapping with other nearby networks

• Improve signal strength to overcome interference from distant sources

LTE Accessibility formula calculates the probability of successful connection to the LTE network.

• LTE Accessibility = (RSRP - PL) - (UE Noise + Interference)

• RSRP: Reference Signal Received Power

• PL: Path Loss

• UE: User Equipment

My current CTC is $80,000 per year.

• My current CTC is $80,000 per year

• I am open to discussing salary expectations during the interview process

• I have experience negotiating salary based on skills and experience

Types of antennas include dipole, Yagi, parabolic, patch, and helical antennas.

• Dipole antenna: simple and commonly used for radio and TV broadcasting

• Yagi antenna: directional antenna with multiple elements for increased gain

• Parabolic antenna: dish-shaped antenna used for satellite communication

• Patch antenna: flat, compact antenna often used in wireless communication

• Helical antenna: spiral-shaped antenna used for circul...read more

There are two main versions of IP addresses: IPv4 and IPv6.

• IPv4 addresses are 32-bit numerical addresses, expressed in four octets separated by periods (e.g. 192.168.1.1).

• IPv6 addresses are 128-bit hexadecimal addresses, expressed in eight groups of four hexadecimal digits separated by colons (e.g. 2001:0db8:85a3:0000:0000:8a2e:0370:7334).

I am a dedicated Network Engineer with over 5 years of experience in designing, implementing, and managing network infrastructures.

• Experience with Cisco routers and switches, having configured and managed networks for small to medium-sized enterprises.

• Proficient in network security protocols, including firewalls and VPNs, ensuring secure data transmission.

• Skilled in troubleshooting network issues, reducing downtime by ...read more