关键词：移动电话系统（AMPS）；网络技术；老无线电技术；无线传输；超高频（UHF）射频；信号强度；分配信道
摘 要：Advanced mobile phone system (AMPS) network technology was used in 1G. AMPS was a voice-only network, operating on the 800 MHz band that was permanently switched off in 1999. AMPS was an old radio technology, and its operation was similar to regular radio transmission such as ultra-high-frequency (UHF) radio, where the 800 MHz band was split into many channels using frequency division multiple access (FDMA). Each channel was 30KHz wide and, hence, supported only 395 mobile phone users per cell tower. The tower estimated the signal strength of each user and allotted channels to them. The tower ensured that these channels were reused without interference by multiple towers.
目 录：

PART 01: Executive summary

Highlights

PART 02: Scope of the report

Market overview

Base year

Common currency conversion rates

Top-vendor offerings

PART 03: Market research methodology

Research methodology

Economic indicators

PART 04: Introduction

Key market highlights

Evolution of 3G and 4G network

PART 05: Market landscape

Market overview

Market size and forecast in terms of revenue

Market size and forecast in terms shipment

Five forces analysis

PART 06: Market segmentation by product

Market overview

Smartphones

Tablets

Mobile hotspots

PART 07: Geographical segmentation

Americas

APAC

EMEA

PART 08: Market drivers

Shutdown of 2G connectivity

Increasing adoption of bring-your-own-device (BYOD)

and bring-your-own-access (BYOA) policies

Growing number of internet users

PART 09: Impact of drivers

PART 10: Market challenges

Handset compatibility with country-specific bandwidth

Mobile devices with integrated wireless hotspots

High tariff plans

PART 11: Impact of drivers and challenges

PART 12: Market trends

Emergence of next-generation wireless networks

Growing popularity of IoT

Upcoming 5G network

PART 13: Vendor landscape

Competitive scenario

Smartphones

Tablets

Mobile hotspots

PART 14: Appendix

List of abbreviations

PART 15: Explore Technavio