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Category: Interviews

5G mmWave 28 GHz Band Link Budget – n257

The combination of 5G NR technology and millimeter wave bands pioneer a new level of mobile performance with ultra-high speeds and low latencies. Momentum behind 28 GHz is growing, with […]

February 14, 2020July 21, 2020 Author 5G, 5G Network Planning, Interviews, LTE, New Radio, RF Basics, Tech Fundas

5G NR Inactive-RNTI (I-RNTI) for RRC_INACTIVE State

In 5G NR, 3GPP specification has introduced an RRC state as RRC_INACTIVE state. The aim of RRC_INACTIVE state is to achieve power saving with acceptable access latency, and is suitable […]

January 23, 2020January 23, 2020 Author 5G Network Planning, Call Flow, Future Network Optimization, Interviews, New Radio, NR, RRC, RRC Signalling, Signaling, Tech Fundas

5G NR Antenna Port – Logical and Physical Antenna Mapping

Downlink multi-antenna transmission is a key technology of 5G NR. Signals transmitted from different antennas ports will experience different “radio channels” even if the set of antennas are located at […]

January 12, 2020April 5, 2021 Author 5G, 5G Physical Layer, Interviews, LTE, New Radio, NR, RF Basics, Tech Fundas

5G NR Cyclic Prefix (CP) Design

Cyclic prefix (CP) refers to the prefixing of a symbol, with a repetition of the end In OFDM wireless systems. The receiver is typically configured to discard the cyclic prefix […]

December 14, 2019July 21, 2020 Author 5G, 5G Physical Layer, Interviews, LTE, New Radio, NR, Tech Fundas

Motivation Behind Having Multiple Numerology in 5G NR

Talking about numerology, as we know LTE has single subcarrier spacing equal to 15khz, but here in NR, we have multiple numerologies and those are represented by Greek letter µ. […]

December 9, 2019July 10, 2020 Author 5G, 5G Physical Layer, Future Network Optimization, Interviews, LTE, NR, Tech Fundas

5G NR Quasi-Colocation Concept, Types and Application

Two signals transmitted from same antenna port shall experience the same radio channel, where as transmitting it from two different antenna ports shall experience different radio conditions. But there can […]

November 30, 2019July 21, 2020 Author 5G, 5G Physical Layer, Interviews, New Radio, NR

5G Identifiers SUPI and SUCI

In telecommunication systems, network operator allocate to each SIM card a unique identifier, known up to the 4G as an IMSI (International Mobile Subscriber Identity) and for the 5G as […]

November 6, 2019July 21, 2020 Author 5G, 5G Network Architectures, Call Flow, Interviews, NAS Signalling, New Radio, NR, RRC Signalling, Security, Signaling, Tech Fundas

5G NR System Information

System information is downlink broadcast information transmitted periodically by base station. it is very critical information for a mobile (UE) to connection the Base station (gNB in 5G) in any […]

November 1, 2019April 24, 2021 Author 5G, Call Flow, Interviews, NR, RRC, RRC Signalling, Signaling, Tech Fundas

Open RAN (O-RAN) Reference Architecture

O-RAN Tutorial The O-RAN Reference Architecture is designed to enable next generation RAN infrastructures. It is designed with the principles of intelligence and openness, the O-RAN architecture is the foundation […]

October 28, 2019January 14, 2023 Author 5G, 5G Network Architectures, Cloud Computing, Future Network Optimization, Interviews, New Radio, NFVI, NR, Tech Fundas

5G System Connection Management: CM-Idle and CM-Connected

When a  Mobile wants to communicate with 5G core network, as it first time switched-on or because it was in  idle state for some time and network removed the resources […]

October 21, 2019July 21, 2020 Author 5G, 5G Network Architectures, Call Flow, Interviews, NAS Signalling, New Radio, Signaling, Tech Fundas

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