DT, Ericsson MmWave Backhaul Test Hits 5G Latency Targets
January 11, 2019 / Dan Meyer
Deutsche Telekom and Ericsson conducted a wireless backhaul test that produced results seen as essential to meeting the low-latency requirements of 5G systems. The test was conducted at a DT lab in Athens, Greece, using millimeter wave (mmWave) spectrum over a distance of 1.4 kilometers (0.8 miles). It produced round-trip latency of less than 100 microseconds (0.1 milliseconds) and a data transmission speed of 40 Gb/s. The latency results go a long way toward fulfilling one of the performance targets for 5G networks of less than 1 millisecond. Those targets are seen as essential for the technology to support use cases like autonomous vehicles and telemedicine. Even more impressive is that the latency results were accomplished on a wireless backhaul link rather than a wired connection. Wireless connection latency often suffers from the overhead required to establish that connection compared with the more immediate setup inherent in wired backhaul connections.