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1. Introduction 5G NR fundamentally redesigned the user-plane architecture by introducing SDAP (Service Data Adaptation Protocol) above PDCP (Packet Data Convergence Protocol). LTE used a bearer-based QoS model. 5G uses a flow-based QoS model. This single architectural shift explains: Why SDAP was introduced Why PDCP evolved Why 5G scales better than LTE How URLLC, slicing, and dual connectivity are supported This article provides: Deep architectural explanation LTE vs 5G com

1. Introduction Power control is one of the least visible but most influential mechanisms in cellular radio systems. In 5G NR, it directly impacts: Uplink throughput and latency Cell-edge user experience Inter-cell interference UE battery life Massive MIMO beam efficiency Network energy consumption (Green RAN goals) Unlike LTE, 5G NR operates with: Very wide bandwidths Beam-based transmission Dynamic TDD Cloud-native and O-RAN architectures As a result, power control in 5G NR

1. Introduction: Why RLC Still Matters in 5G NR When discussions around 5G performance arise, attention usually gravitates toward massive MIMO, beamforming, or spectrum efficiency. Yet, in real networks, user experience often degrades due to issues far removed from PHY or antennas. One of the most common root causes lies in the Radio Link Control (RLC)  layer. In 5G NR, RLC sits between PDCP and MAC, just like LTE. But assuming it is “unchanged from LTE” is a mistake. While t

1. Introduction Medium Access Control (MAC) scheduling is one of the most critical real-time functions in a 5G NR gNB. It directly determines throughput, latency, fairness, spectral efficiency, and QoS compliance. Unlike LTE, 5G MAC scheduling operates in a much more complex design space due to: Flexible numerology (multiple SCS) Mini-slots and slot aggregation Beam-based transmissions Massive MIMO QoS flows (5QI-driven scheduling) URLLC pre-emption and puncturing Dynamic TDD

1. Introduction Channel coding is one of the most fundamental building blocks of the 5G NR physical layer. It directly determines: Block Error Rate (BLER) Throughput at high MCS Latency predictability UE power consumption Hardware scalability in gNB and UE Unlike LTE, which relied almost exclusively on Turbo codes, 5G NR deliberately replaced Turbo codes with Low Density Parity Check (LDPC) codes for data channels and Polar codes for control channels.   LDPC Coding Chain in 5

1.      Introduction The RRC_INACTIVE state represents a fundamental architectural innovation in 5G New Radio (NR), introduced to address critical latency and signaling overhead challenges that plagued LTE networks. In LTE, frequent transitions between RRC_IDLE and RRC_CONNECTED states created substantial network signaling load and introduced latency penalties during service resumption, particularly problematic for modern smartphone usage patterns characterized by frequent sm

O-DU ↔ O-RU Interoperability Troubleshooting (O-RAN WG4 C/U, S & M Planes)  focuses on identifying and resolving functional and timing mismatches between the Distributed Unit (O-DU) and Radio Unit (O-RU) across the Open Fronthaul interface defined by O-RAN Working Group 4. It provides a systematic approach to diagnosing issues in the Control/User Plane (C/U), Synchronization Plane (S), and Management Plane (M)—the three pillars of inter-vendor interoperability. The guide emph

1. Introduction DMRS (Demodulation Reference Signals) are UE-specific reference signals in 5G NR that provide essential channel...

Introduction   What is PUCCH in 5G NR? The Physical Uplink Control Channel (PUCCH) in 5G New Radio (NR) is the channel through which the...

1.      Introduction Orthogonal Frequency Division Multiplexing (OFDM) is a powerful modulation technique used in modern wireless...

Orthogonal Frequency Division Multiplexing (OFDM) is a cornerstone of modern wireless communication systems, offering robustness against...

1. Introduction to HARQ HARQ  (Hybrid Automatic Repeat reQuest) is a critical error control method used in wireless systems like LTE and...

Introduction The Synchronization Signal Block (SSB) is a fundamental component of 5G New Radio (NR) systems, enabling user equipment (UE)...