Keysight Technologies recently became the first to receive Global Certification Forum (GCF) validation of a 5G Location-Based Services (LBS) Assisted Galileo (A-Galileo) test case by combining the new radio ( NR) 5G and GNSS technology, an achievement that will accelerate the implementation of LBS on smartphones.
Together, 5G NR and GNSS create Assisted GNSS (A-GNSS), allowing mobile phone providers to verify that designs comply with the latest 3GPP specifications that support precise location positioning for industries such as healthcare, transportation ground and air, emergency and rescue services, public safety and national security. Precise positioning services also make it possible to offer personalized services that support entertainment, hospitality and retail applications.
“A-GNSS enables a GNSS receiver in the 5G smartphone to obtain information from network resources to aid in satellite location,” Keysight CEO Muthu Kumaran said. “It is useful, especially when the receiver is in a place where it is difficult for a satellite signal to penetrate. The challenge is that the satellites have a very low signal level because they are so far out in space, so the performance of the GNSS receiver is crucial. Industry certification becomes important to ensure its performance, in accordance with the standard.”
The approval process required Keysight to implement the 3GPP-defined test on its E7515B UXM 5G Wireless Test Platform, a compact signaling test platform with multi-format stack support, high processing power, and abundant RF resources to emulate various security scenarios. mobility in a 5G network, as well as a recommended GNSS emulator to deliver the LBS test case. The test case is validated by capturing pass records from two different devices and sending them to an independent validation organization to verify compliance with the specifications, Kumaran said. The 72nd meeting of the GCF Conformance Agreement Group (CAG) confirmed the validation of the test case in October.
The test case was supported by Keysight’s S8705A RF/RRM DVT and Conformance Toolset. The toolset provides access to a wide range of RF, Radio Resource Management (RRM) and Development Validation Test (DVT) test cases that are used to verify 5G NR designs in both non-deployment modes. autonomous (NSA) as autonomous (SA).
“The S8705A toolset supports the broadest validated coverage for 5G NR test cases, including TRx, Demod, RRM, Data Throughput, and A-GNSS, allowing the user to pre-test and conformance test their applications. products before market launch,” Kumaran said. “The toolkit also allows for flexible test parameterization to benchmark the device and test it beyond the limits set by compliance regimes.”
A location-based service is any technology that relies on real-time location tracking to work, Kumaran said.
“The technology constantly identifies the physical and geographic location of the user, which is then used to perform services and functions,” Kumaran said. “The core technology is GNSS (GPS, Galileo, Glonas, Beidou), but cellular technology, which uses base station triangulation, can also be combined with GNSS to increase location accuracy.”
LBS test cases like this one allow users to verify sensitivity, accuracy, and dynamic range on mobile phones that use satellite constellations to pinpoint a precise geographic location.
A variety of industries can benefit from LBS, including travel. Ride-sharing apps use LBS to work, while roadside assistance companies often offer an app that makes it possible to track someone’s exact location after a car accident, for example, Kumaran said.
Public safety is another area where LBS plays a critical role, Kumaran said, by identifying the physical locations of emergency callers.
“When callers to Public Safety Answering Points (PSAPs) are unable to accurately provide their location, measures are needed to send first responders to the correct location,” Kumaran said. “Similarly, in a mass emergency event, the ability to send smart messages to only those users within a well-defined geographic area can make official response measures more effective. Both scenarios rely on the accuracy, speed, and reliability of automated LBS to help public safety personnel find and help those in need.”
Keysight plans to increase test case coverage for LBS, whether for Assisted Galileo, Assisted GPS or Assisted Beidou, Kumaran said, and will work to obtain the first GCF validation for LBS test cases for the Glonass global navigation satellite system as soon as the devices are available.
Once that goal is met, the company will focus on validating the positioning enhancements in Rel-16, enabling precise positioning with cellular-assisted GNSS, not only outdoors with satellite visibility, but also indoors. .
“For that, devices will need to support a new downlink-based positioning method to meet the positioning accuracy demanded in these new scenarios,” Kumaran said. “This new method is based on a new positioning reference signal (PRS) that allows a more accurate estimation of time of arrival (ToA). The UE will report the PRS received from multiple base stations and this information will allow accurate determination of its position.
Keysight will continue to support testing of positioning enhancements to be included in Rel-17 with a focus on Industrial Internet of Things scenarios, Kumaran said, which will require higher accuracy and lower latency.
“New applications demand new scenarios where it is required to know the position of the device faster and with more and more precision,” Kumaran said. “This is achieved by combining global navigation satellite system (GNSS) and cellular technologies.”