Overview of mobile networking, evolution from 2G to 5G, key technologies, and the importance of mobile networks in today's connected world.
Introduction to Mobile Networking
Key concepts, components, and technologies that enable communication for devices on the move.
| Component | Role | Typical Technologies |
|---|---|---|
| User Equipment (UE) | End‑device that accesses the network | Smartphones, tablets, wearables, vehicle‑on‑board units |
| Radio Access Network (RAN) | Handles wireless link between UE and core | Base stations (eNodeB/gNodeB), small cells, Wi‑Fi APs |
| Core Network | Provides routing, authentication, billing, and service control | EPC (4G), 5G Core (5GC), IMS |
| Backhaul | Connects RAN to the core over high‑capacity links | Fiber, microwave, satellite |
| Transport Network | Carries data across the internet and between operators | MPLS, IP, SD‑WAN |
| Management & Orchestration | Configures, monitors, and optimizes the network | OSS/BSS, SDN controllers, network slicing |
| Generation | Frequency Bands | Peak Data Rate* | Key Features |
|---|---|---|---|
| 1G (Analog) | 800–900 MHz | ~2 kbps | Voice only, analog modulation |
| 2G (GSM, CDMA) | 850–1900 MHz | ~64 kbps | Digital voice, SMS, basic data |
| 3G (UMTS, CDMA2000) | 850–2100 MHz | ~2 Mbps | Packet‑switched data, video calls |
| 4G LTE | 600 MHz–3.5 GHz (plus mmWave) | 100 Mbps (mobile) / 1 Gbps (fixed) | All‑IP core, OFDMA, MIMO |
| 5G | Sub‑6 GHz & mmWave (24–100 GHz) | 10 Gbps+ (mobile) | URLLC, massive MIMO, network slicing, edge computing |
*Typical peak rates under ideal conditions.