Article directory
foreword
5G inherits the design concept of 3G4G, and has carried out a series of special optimizations for various vertical applications.
2B is for enterprises, 2C is for users
4G LTE core architecture: OFDMA + MIMO
5G NR (New Radio New Air Interface): greater flexibility in the time domain and frequency domain: eMBB (enhanced mobile broadband), URLLC (high reliability and low latency communication), mMTC (Massive Internet of Things)
3GPP R15 version: eMBB;
R16 version: URLLC, NR V2X, unlicensed spectrum communication, terminal energy saving
I. Overview
1G: 1970s, cellular networking, analog voice services
2G: 10 years later, narrowband digital mobile communication, supporting short messages and low-speed data, commercial
3G: late 1990s, WCDMA, CDMA2000, TD-SCDMA, 10Mbps
4G: 2010, OFDM, MIMO, 100Mbps-1Gbps
In 2013, the domestic IMT-2020 (5G) promotion group
5G adopts NR (New Radio New Air Interface), LTE-based OFDM + MIMO, larger spectrum range and carrier bandwidth, flexible frame structure, diverse parameter sets, optimized reference signal design, new coding, symbol-level resource scheduling, MIMO Enhancement, delay reduction, coverage enhancement, mobility enhancement, terminal energy saving, signaling design optimization, new network architecture, QoS enhancement, network slicing, vehicle networking (Vehicle to everything, V2X), industrial Internet (Industry Internet of Things, IIoT ), Unlicensed Spectrum Design (New Radio-Unlicensed)