GPS World

Tag: MBS

  • Rohde & Schwarz and Bluetest partner on A-GNSS OTA antenna testing

    Rohde & Schwarz and Bluetest partner on A-GNSS OTA antenna testing

    Testing the antenna performance of GNSS signals such as GPS, GLONASS, Beidou, Galileo and Metropolitan Beacon Systems (MBS) is key to location accuracy performance of a mobile device.

    To address the testing need for A-GNSS services, Rohde & Schwarz and Bluetest are partnering in creating test concepts for over-the-air (OTA) antenna measurements.

    The CMW500 wideband radio communication tester. (Photo: Rohde & Schwarz)
    The CMW500 wideband radio communication tester. (Photo: Rohde & Schwarz)

    The two companies integrate the R&S LBS Server, a software component running on the R&S CMW500 wideband radio communication tester, and the Bluetest OTA test solution for A-GNSS systems based on Bluetest’s RTS65 reverberation chamber and Bluetest’s Flow measurement software.

    In the test setup, the R&S LBS Server controls the Rohde & Schwarz base-station simulator R&S CMW500 for LTE, WCDMA and GSM, and uses the R&S SMBV100B vector signal generator for simulation of GNSS and MBS signals.

    A simple and straightforward upgrade of the setup for 5G will be available soon, making sure that investments are protected and most relevant standards can be tested with the same system.

    The R&S LBS Server is an essential part of the R&S TS8991 OTA Performance Test System. This cooperation between Rohde & Schwarz and Bluetest marks the first time that the R&S LBS Server, used here as a software tool on R&S CMW500, is available also for third parties.

    “We are delighted to collaborate with Bluetest to contribute with our test and measurement expertise to OTA 4G/3G/GSM and GNSS technology development,” said Alexander Pabst, vice president, Systems and Projects at Rohde & Schwarz. “With a strong global footprint for location based services LBS and close cooperation with partners, Rohde & Schwarz is committed to accompanying the evolution path from OTA testing for GPS, GLONASS, BeiDou and Galileo with innovative test and measurement solutions.”

    “The addition of A-GNSS measurements means that the full range of wireless technology in a modern cellular device can be verified with just one test solution,” said Robert Rehammar, Bluetest CTO. “Bluetest has enjoyed the close cooperation with Rohde & Schwarz on this project, leading to a very strong joint solution and customer offering.”

  • NASA program for UAVs in cities turns to NextNav

    NextNav’s Metropolitan Beacon System (MBS) service has been accepted for use by NASA. NASA will use NextNav’s MBS network as part of its CERTAIN (City Environment for Range Testing of Autonomous Integrated Navigation) facilities at NASA’s Langley Research Center in Hampton, Virginia.

    CERTAIN supports, among other programs, Urban Air Mobility (UAM), an air transportation system with myriad applications from small package delivery drones to passenger-carrying air taxis.

    The Federal Aviation Administration (FAA) believes that by 2022 there will be more than 700,000 drones delivering packages, monitoring traffic and aiding in search and rescue operations. NASA’s role is to provide research findings to reduce technical barriers associated with integrating unmanned aircraft systems into the national airspace system.

    NextNav’s MBS system facilitates urban drone operations where satellite-based GPS signals may not be available. The need to reliably know a drone’s location horizontally and vertically is critical to ensure safe operations in urban air traffic corridors.

    Uber in the Mix. Uber and Bell (formerly Bell Helicopter) plan to launch an on-demand mobility venture, or flying taxis, nationwide by 2023, so the need to precisely track vehicles moving throughout city airspace is imminent.

    The move to such flying taxis would require a change to current FAA-controlled airspace separation requirements, according to Tom Prevot, Uber’s director of airspace systems. He stated that the Uber venture foresees takeoffs and landings from city vertiports every 24 seconds, requiring a considerable reduction in the minimum-distance standards of 1,000 feet vertically or 3 to 5 nm horizontally, as currently mandated in FAA order JO 7110.65.

    Metro Beacons. “NextNav’s MBS system provides us with new tools for the development of navigation systems in environments where GPS has traditionally been challenged,” said Evan Dill, Safety-Critical Avionics Systems Branch of NASA. “We’re looking forward to working with MBS as we develop new approaches to the operation of unmanned systems in urban environments.”

    NextNav’s wide-area terrestrial positioning network provides accurate and secure location services, critical for unmanned aircraft navigation. In addition, MBS complements and integrates seamlessly with GPS and provides a level of geo-redundancy ensuring a safe and efficient system for future air transportation in cities and urban areas, with particularly difficult challenges at low altitudes where solutions such as radar, GPS and ADS-B are unreliable or insufficient.

    Delivered over a managed network on nationwide licensed spectrum with carrier-grade dependability and metropolitan-wide coverage, NextNav said its services are designed for public safety applications, E911, critical infrastructure, as well consumer, Internet of Things (IoT) and commercial applications that require reliable 3D geolocation indoors and urban areas or precise timing.

    Future city airspace filled with drones and passenger aircraft. (Image: NASA)
    Future city airspace filled with drones and passenger aircraft. (Image: NASA)

    “We are proud to work with NASA and integrate MBS into its urban drone operations,” said Ganesh Pattabiraman, co-founder and CEO of NextNav. “The MBS system is designed for secure, reliable and consistent 3D geolocation capabilities, which are important for autonomous systems such as drones. NASA’s acquisition of the MBS system is an exciting milestone for MBS technology and a great partnership with NASA to address the key challenges in urban drone navigation and make it possible to explore new opportunities in unmanned operations.”

  • NextNav supports metropolitan beacon system for mobile

    The final specification for 3GPP Release 13 will include messaging support for Terrestrial Beacon System (TBS) location technologies, including the Metropolitan Beacon System (MBS).

    NextNav is deploying the MBS positioning technology across the U.S. to allow mobile phones and other devices to reliably determine their location in indoor and urban environments where GPS signals can’t be received.

    NextNav has adopted MBS for its nationwide deployment, which it calls an innovative “terrestrial constellation” bringing GNSS-like positioning performance to indoor and urban environments where satellite-based positioning is either unavailable or significantly degraded. By standardizing the core network information flow in 3GPP, support for MBS will become available across any Release 13-compliant LTE network platforms globally, similar to previously standardized GNSS systems such as GPS, GLONASS, BeiDou and Galileo satellite signals.

    NextNav’s system is complementary to GPS and delivers high precision latitude, longitude and “floor level” altitude in GPS-challenged areas such as indoors and urban locations across an entire metropolitan area. Unlike cellular positioning in LTE, MBS does not consume expensive wireless spectrum to do so.

    “We are gratified, after an especially intensive effort, to see 3GPP add support for Terrestrial Beacon Systems generically and for supporting the NextNav implementation of it — the Metropolitan Beacon System,” said Ganesh Pattabiraman, president of NextNav. “This speaks to the urgent market requirements for ubiquitous, high-quality indoor positioning. MBS availability as an international standard ensures that our location signals can be used in widely deployed LTE (long-term evolution) networks as part of an end-to-end system. It also opens the doors for multi-vendor systems, a critical consideration for our carrier customers and users worldwide.”

    The 3rd Generation Partnership Project (3GPP) unites seven telecommunications standard development organizations (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC) and provides their members with a stable environment to produce the reports and specifications that define 3GPP technologies.