5G NR
By 3GPP
5G NR (New Radio) is the air interface standard developed by 3GPP that defines how devices and cell towers communicate over 5G cellular networks. It specifies the radio signaling, frequency bands, and modulation schemes used to deliver…
Definition
5G NR (New Radio) is the air interface standard developed by 3GPP that defines how devices and cell towers communicate over 5G cellular networks. It specifies the radio signaling, frequency bands, and modulation schemes used to deliver higher data rates, lower latency, and greater device density than the LTE standard it succeeds, and it underpins both mobile broadband and machine-to-machine cellular connectivity.
Overview
5G NR was designed because LTE's radio architecture, built primarily around smartphone mobile broadband, could not efficiently serve the much broader range of use cases envisioned for 5G, including ultra-low-latency applications, massive numbers of connected sensors, and very high bandwidth links, all with different and sometimes conflicting requirements. Rather than a single incremental radio update, 5G NR was built as a new, more flexible air interface from the ground up. Mechanically, 5G NR operates across two very different frequency ranges: sub-6 GHz bands, which behave similarly to LTE in coverage and penetration but offer moderate speed gains, and millimeter-wave bands above 24 GHz, which provide very high throughput and low latency but travel short distances and struggle to pass through walls. NR uses flexible numerology, meaning the spacing between subcarriers and the length of time slots can be adjusted for a given deployment, letting the same underlying standard serve a low-latency industrial sensor and a high-throughput video stream with different radio configurations. It also supports network slicing at the radio level, allowing an operator's infrastructure to be logically partitioned so that different services get distinct guaranteed characteristics without needing separate physical networks. 5G NR is the direct successor to LTE within 3GPP's cellular standards lineage, and early 5G deployments frequently run in non-standalone mode, where 5G NR handles the radio link for data while LTE's core network still manages call setup and mobility, before operators migrate to a full 5G standalone core. This distinguishes 5G NR, a radio interface standard, from the broader term '5G,' which also encompasses core network architecture, network slicing management, and edge computing integration beyond just the airwaves. In practice, 5G NR is what phones, fixed wireless routers, and increasingly industrial IoT devices connect through when a carrier advertises 5G coverage, with sub-6 GHz used for broad area coverage and millimeter-wave reserved for dense urban areas, stadiums, and fixed installations where its short range is not a problem. Enterprises are also adopting private 5G NR networks for factory and campus connectivity where Wi-Fi's reliability guarantees are insufficient. The main trade-off is coverage versus speed: millimeter-wave's dramatic throughput comes at the cost of very limited range and poor building penetration, requiring dense infrastructure that is expensive to deploy broadly, while sub-6 GHz 5G NR offers much more modest speed gains over LTE in typical real-world conditions. Devices and chipsets must also support both frequency ranges and both standalone and non-standalone modes to work reliably across different carriers' rollout stages.
Specification
- Operates across sub-6 GHz and millimeter-wave frequency ranges
- Uses flexible numerology to adapt subcarrier spacing per use case
- Supports network slicing to partition infrastructure for different services
- Runs in non-standalone mode alongside an existing LTE core network
- Migrates to a full 5G standalone core for end-to-end 5G architecture
- Delivers substantially lower latency than LTE for supporting applications
- Serves both mobile broadband and machine-to-machine cellular use
- Requires dense infrastructure for millimeter-wave deployments