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Articles.

Three technical pieces on HSUPA uplink architecture, 3G hardware ecosystems, and the standards that shaped modern cellular design.

Signal tower infrastructure representing 3G to 5G uplink evolution

No.01ARCHITECTUREApril 28, 2026

From HSUPA to 5G: The Evolution of Mobile Uplink Technology

A technical walkthrough of how mobile uplink architecture evolved from HSUPA's 3.5G packet access through LTE to modern 5G NR, and what that progression means for practitioners today.

Vintage 3G USB modem and mobile broadband hardware

No.02HARDWAREApril 15, 2026

Guide to 3G Mobile Broadband Hardware: Routers, Data Cards, and What They Got Right

A practitioner's reference on the HSUPA-era hardware ecosystem, USB dongles, ExpressCard modems, and mobile routers, and how those design decisions informed modern cellular modem architecture.

Abstract network architecture diagram for 3.5G HSPA standards

No.03STANDARDSMarch 22, 2026

HSUPA vs HSDPA: Understanding 3.5G Architecture and Its Modern Relevance

A technical comparison of HSUPA (uplink) and HSDPA (downlink) within the HSPA framework, covering channel design, scheduling, HARQ, and how these mechanisms influenced LTE and 5G NR architecture.