The 4g 5g difference is that 5g networks use higher-frequency radio waves to achieve peak speeds 20x faster than 4g LTE (3 Gbps vs 150 Mbps), with latency under 5ms versus 30ms for 4g. This enables near-real-time applications like remote surgery and autonomous vehicles.
5g uses millimeter-wave spectrum (24 GHz-100 GHz) alongside existing 4g frequencies. Smaller wavelengths allow more antennas in the same space, creating "massive MIMO" arrays that beamform signals directly to devices. 4g LTE Advanced maxes out at 64 antenna ports; 5g supports 256.
5g also introduces network slicing, dividing physical infrastructure into virtual networks optimized for specific uses. A factory automation slice might prioritize ultra-reliable low-latency communication (URLLC) over throughput, while a mobile broadband slice maximizes bandwidth.
| Feature | 4g LTE | 5g NR |
|---|---|---|
| Peak download speed | 150 Mbps | 3 Gbps |
| Latency | 30ms | <5ms |
| Bandwidth | 20 MHz channels | 100 MHz channels |
| Base station range | 10 km | 1 km |
| Spectrum used | Sub-6 GHz | Sub-6 GHz + mmWave |
5g's sub-5ms latency enables applications impossible on 4g. In a 2020 trial, doctors in London performed remote ultrasound exams on patients in Norway using 5g's low latency. The delay was imperceptible compared to 4g's 30ms lag, which would make real-time manipulation difficult.
Gaming benefits similarly. Cloud gaming services like Xbox Cloud Gaming require round-trip latency under 20ms for smooth play. 4g's 30ms latency causes noticeable input lag, while 5g's 5ms latency matches wired connections.
Many assume 5g replaces 4g entirely. In reality, 5g networks rely on 4g infrastructure for coverage. 5g standalone (SA) networks use 5g core and radio access network exclusively, but non-standalone (NSA) 5g piggybacks on 4g cores during the transition.
Cities like Las Vegas use 5g for smart infrastructure. Traffic lights adjust in real time based on vehicle locations transmitted via 5g, reducing idle time by 40%. 4g's higher latency couldn't support the millisecond-scale coordination required.
During the Beijing 2022 Winter Olympics, 5g enabled 8K video broadcasts and virtual reality viewing experiences. The International Telecommunication Union (ITU) requires 5g networks to support at least 6 Gbps for such applications, far beyond 4g's capabilities.
The 3GPP standards organization plans to increase 5g's peak data rate to 40 Gbps by 2030. Research published in IEEE Access suggests this could enable holographic communications, where 3D projections replace video calls. Such applications demand the ultra-low latency and massive bandwidth only 5g provides.