ALLPCB
3GPP NTN Frequency and Bandwidth Requirements
Technical summary of NTN frequency and bandwidth requirements in 3GPP Release 17, covering satellite bands (n255/n256), channel bandwidths, NRB/SCS and IoT NTN UE categories.
Mobile Base Stations: Cells, Sectors, Carriers Explained
Technical overview of base stations, cells, sectors, and carriers: explains antenna sites, sector vs. cell distinctions, and how carrier and carrier frequency define logical cells.
Classic Mobile Operating Systems
Historical overview of mobile operating systems (1973–2007), detailing milestones from early PDAs and smartphones to Symbian's rise and market shifts.
Cellular Mobile Communication and Network Architecture
Overview of cellular mobile communication architecture, covering base stations, BSC/MSC, frequency reuse, mobility, handover, and dynamic resource allocation.
High-Speed Rail Mobile Communication: Evolution and Challenges
Technical overview of rail mobile communication: transition to LTE?R and 5G?R, core challenges (Doppler, penetration loss, handovers) and engineering mitigation strategies.
Equipment Needed to Build a 5G Base Station
Overview of 5G base station equipment, components, and layered architecture covering antenna systems, RRU/BBU functions, transmission, power, and monitoring.
5G VoNR vs 4G VoLTE: Technical Comparison
Technical overview of 5G voice: VoNR vs VoLTE, call states, SA/NSA deployment options, and 5G–4G handover and dual-connectivity behavior.
3GPP Global 5G Spectrum Overview
Overview of 5G spectrum: FR1/FR2 band characteristics, spectrum refarming, licensing models, and dynamic spectrum sharing considerations for deployments.
5G Low-Band vs High-Band and mmWave Frequency Ranges
5G millimeter-wave (mmWave) frequency overview (~24-100 GHz), common bands, and technical differences vs Sub-6 GHz in range, penetration, and capacity.
5G Network Interfaces Overview
Technical overview of 5G network interfaces, covering radio and core protocols, NG-RAN/NG-Core interactions, key functions (AMF, SMF, UPF) and LDPC coding.
5G RedCap: Power-Saving Tech and Testing
Explore 5G RedCap's power-saving tech for IoT, including DRX, eDRX, and testing solutions for energy efficiency.
Differences Between 5GHz Wi-Fi, Wi-Fi 6, and Wi-Fi 5
Technical overview of 5 GHz Wi?Fi vs 2.4 GHz, comparison of 5G cellular bands with Wi?Fi/Wi?Fi 6, and compatibility considerations for Wi?Fi 5 extenders.
How 5G-R Differs from GSM-R and Public 5G
Technical overview of 5G-R for China State Railway: MIIT trial 2100 MHz spectrum allocation, private network architecture, edge computing and network slicing.
S7 Protocol Overview and PROFINET Differences
Technical comparison of Modbus TCP and Ethernet, differences between S7 and PROFINET, and an S7 protocol layer overview for industrial automation engineers.
Applications of CDMA in Mobile Communication
Summary of CDMA applications and network traits in mobile communication, covering 3G/4G/5G, satellite systems, spectral efficiency, interference resistance and capacity.
RedCap: A Deep Dive into 5G Technology
Explore RedCap, a 5G technology reducing complexity and cost for industrial, surveillance, and wearable applications with low latency.
AMF and gNB Interface Types in 5G NR
Technical overview of AMF and gNB in 5G NR, detailing N2/F1/X2 interfaces, AMF control-plane functions (mobility, session, security), and REG/RB resource mapping.
What Components Make Up a 5G Base Station?
Analysis of 5G base station cost breakdown in China: component-level estimates for BBU/AAU, power/auxiliaries and civil works, with a ~450,000 yuan total estimate.
6G Core Network Architecture and Functions
Analyzes 6G core network requirements and proposes an information-centric, capability-inclusive core architecture that enables AI, computing, and flexible user-plane processing.
Key Mobile Communication Technologies and Applications
Overview of mobile communication key technologies and application scenarios, covering cellular network evolution (GSM/LTE/5G), multiple access, antennas and mobile internet