Ericsson Senior RF Engineer Interview Questions and Answers

QCI stands for QoS Class Identifier, a parameter used in LTE networks to differentiate between different levels of service quality. QCI7 is used for Internet of Things (IoT) applications.

• QCI stands for QoS Class Identifier in LTE networks

• It is used to differentiate between different levels of service quality

• QCI7 specifically is used for Internet of Things (IoT) applications

MME Drop and eNodeB Drop in LTE refer to the loss of connection between the mobile device and the network due to various reasons.

• MME Drop refers to the loss of connection between the mobile device and the Mobility Management Entity (MME) in LTE network.

• eNodeB Drop refers to the loss of connection between the mobile device and the eNodeB (base station) in LTE network.

• These drops can occur due to factors such as poor sig...read more

Nokia is a global leader in telecommunications technology and I am passionate about RF engineering, making this job a perfect fit for me.

• Nokia is a renowned company with a strong reputation in the telecommunications industry

• I have a deep interest in RF engineering and Nokia offers opportunities to work on cutting-edge technologies in this field

• The company's commitment to innovation and continuous learning aligns with m

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

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

I am currently working on designing and testing a 5G small cell device.

• Designing and testing a 5G small cell device

• Working on optimizing the device's performance

• Collaborating with cross-functional teams to ensure successful deployment

• Conducting field tests to evaluate the device's capabilities

Optimization in RF planning involves fine-tuning network parameters to improve performance and efficiency.

• Optimization involves adjusting parameters such as antenna tilt, power levels, and handover parameters to improve network coverage and capacity.

• It also includes analyzing network KPIs and making adjustments to meet performance targets.

• Optimization may involve implementing features like carrier aggregation, MIMO, an...read more

Optimization of RF conditions is crucial for ensuring optimal network performance.

• Optimization involves adjusting various parameters such as power levels, antenna tilt, and frequency allocation to improve network performance.

• RF conditions refer to the quality of the radio frequency signal, including factors like signal strength, interference, and noise.

• Water can affect RF conditions by absorbing or reflecting radio wav...read more