Bearing Measurement with Beam Sweeping for Positioning in 5G Networks
Grigoriy Fokin
Abstract
Salient feature of 5G, which distinguishes it from positioning in 2G-4G networks, is wider utilization of bearing measurements with beam Reference Signal Received Power (RSRP), which enables not only time-based (trilateration) as in previous 3GPP specifications, but also angle-based (triangulation) user equipment (UE) positioning. New Radio (NR) millimeter wave (mmWave) communication with compact narrow beam steerable antennas in stationary and mobile UE leads to paradigm shift in network location estimation capabilities and promises ambitious sub-meter positioning accuracy. Angle of arrival (AOA) and angle of departure (AOD) estimation is a part of beam management procedure, specified by 3GPP. During UE initial access beam sweeping is utilized and directly affects speed and accuracy of AOA and AOD bearing measurement acquisition. Contribution of current research is simulation model investigation of bearing measurement with dual transmit and receive beam sweeping for various use cases and different parameters, allowing qualitative evaluation of its influence on UE positioning accuracy and speed.