Uplink Positioning Reference Signaling Beam Correspondence
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Solution Overview
Problem
In wireless communication systems, especially in multi-beam systems, user equipment (UE) faces challenges in determining the appropriate beam for transmitting uplink positioning reference signals (UPRS) to base stations, leading to inefficient positioning services due to unsuitable beam selection.
Innovation Solution
The described techniques enable UE to determine a transmit beam for UPRS based on received synchronization signals and beam correspondence, allowing for coordinated transmission and reception of positioning reference signals, thereby avoiding beam sweeping and optimizing signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE performs beam sweeping through a set of transmit beams to transmit UPRS, then the UE can ensure coverage to all possible directions, but the positioning efficiency deteriorates due to increased time and resource consumption
Solution Approach 1:
The base station performs beam sweeping and determines beam correspondence relationships before the UE needs to transmit UPRS. The base station identifies which transmit beams are suitable for receiving UPRS from different UEs and communicates this information to the UEs. This preliminary action eliminates the need for UEs to perform time-consuming beam sweeping, thereby improving positioning efficiency while maintaining reliability.
Solution Approach 2:
The base station acts as an intermediary that performs beam sweeping and determination of beam correspondence on behalf of the UE. Instead of the UE directly performing beam sweeping (which is time-consuming), the base station performs this function and provides the results to the UE, enabling the UE to quickly determine the appropriate transmit beam for UPRS transmission.
2Measurement precision
If UE uses legacy positioning methods without beam correspondence, then the system complexity remains low, but the positioning accuracy deteriorates due to unsuitable beam selection
Solution Approach 1:
The base station performs preliminary beam sweeping and determines beam correspondence relationships before positioning operations. This preliminary action provides the UE with pre-determined beam information, enabling accurate beam selection for UPRS transmission without requiring complex UE-side beam management, thus improving positioning accuracy while keeping system complexity manageable.
Solution Approach 2:
The base station serves itself by performing beam sweeping and determining beam correspondence relationships that will benefit both the base station and the UEs. This self-service approach allows the base station to optimize its own receiving beams while simultaneously providing accurate beam information to UEs, improving positioning accuracy without significantly increasing overall system complexity.
3Ease of operation
If UE transmits UPRS without accurate beam selection, then the transmission process is simple, but the communication reliability deteriorates due to signal loss in multi-beam systems
Solution Approach 1:
The base station acts as an intermediary that provides pre-determined beam correspondence information to the UE. This allows the UE to transmit UPRS with accurate beam selection without performing complex beam sweeping itself, thereby maintaining transmission simplicity while significantly improving communication reliability in multi-beam systems.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A user equipment (UE) may identify a beam correspondence between a set of synchronization signals transmitted by a base station and an uplink positioning reference signal. The UE may receive a synchronization signal from a base station and determine a transmit beam for the UE to use to transmit the uplink positioning reference signal based on the received synchronization signal and the identified beam correspondence. The UE may then transmit the uplink positioning reference signal using the determined transmit beam. A base station may identify a beam correspondence between a set of synchronization signals and an uplink positioning reference signal, and transmit an indication of the beam correspondence. The base station may then receive the uplink positioning reference signal from a UE based on the transmitted indication of the beam correspondence.