NIST Helps Build Accurate Measurement Infrastructure for 5G Communications

As fifth-generation (5G) devices and networks begin to roll out, the US-based National Institute of Standards and Technology (NIST) is helping to build the crucial measurement infrastructure for emerging wireless systems by developing new measurement methods and analysis tools and by facilitating the sharing of 5G performance data.  These resources can help industry optimize designs for many applications, including cellphones, the internet of things, virtual reality, smart manufacturing and autonomous vehicles.

One new NIST resource is a 5G Spectrum Sharing Test Bed, an adaptable network that can measure how well 5G and older systems, such as Wi-Fi, GPS and military radar, can operate without interfering with each other on increasingly crowded airwaves, an approach called spectrum sharing.  Unlike previous wireless communication standards, 5G uses a wider range of frequency bands that may overlap with other systems.  These frequency bands are divided into smaller intervals that travel through “channels,” which can be envisioned as tubes containing certain frequencies along with specific network settings and environmental features.

The test bed will help clarify how thousands of different possible network settings and environments through which signals travel will affect interference between 5G and older systems operating in the same frequency band.

The 5G mmWave Channel Model Alliance, organized by NIST five years ago to address the need for accurate channel measurements and models, now has more than 175 participants representing 80 academic, government and industry research organizations worldwide.  The Alliance has produced dozens of datasets and complex models for 5G communications scenarios ranging from offices to shopping malls to outdoor areas.  These resources are publicly available and used by many companies and some organizations that set telecommunications standards.  The group has also developed best-practice measurement guidelines for instrumentation used at these frequencies.

NIST is also developing antenna evaluation methods to boost 5G capacity and publicly available simulation platforms to evaluate wireless communication system performance.

Another NIST facility — the NIST Broadband Interoperability Test Bed — is also in the midst of a 5G upgrade and will eventually include a suite of four new shielded rooms to enable testing across multiple chambers.  The 5G Test Bed capabilities include a stand-alone information technology network and “carrier-grade” commercial base stations, and support of 5G, older 4G systems, Wi-Fi and GPS.  It can also be reconfigured to support other networks of interest.