Joint UE and Ambient RFID Positioning via Backscattered Signals
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently obtaining positioning measurements for both user equipment (UE) and ambient radio frequency identification (RFID) devices within the same positioning session, leading to increased power consumption and resource utilization.
Innovation Solution
A method where a first network node obtains both first positioning measurements of reference signals from second network nodes and second positioning measurements of backscattered signals from ambient RFID devices during the same positioning session, allowing for joint positioning of the UE and RFID devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If separate positioning sessions are conducted for UE and RFID devices, then positioning accuracy for each device is maintained, but power consumption and resource usage increase
Solution Approach 1:
The patent combines separate positioning sessions for UE and RFID devices into a single joint positioning session. The location server simultaneously processes positioning measurements for both UE and RFID devices, sharing common signaling resources, reference signals, and measurement procedures. This merging reduces redundant transmissions and computations, thereby lowering power consumption while maintaining positioning accuracy through coordinated measurement of both device types in the same session.
Solution Approach 2:
The positioning session is designed to serve multiple functions simultaneously: it performs positioning for UE, positioning for RFID devices, and enables mutual assistance between the two device types. The same positioning infrastructure and signaling mechanisms are universally applied to both UE and RFID devices, allowing the system to achieve multiple positioning objectives without requiring separate dedicated sessions for each device type.
2Productivity
If joint positioning session is used for UE and RFID devices, then power consumption and resource usage are reduced, but system complexity increases
Solution Approach 1:
The joint positioning session is segmented into distinct functional components: UE positioning measurements, RFID device positioning measurements, common signaling procedures, and device-specific processing. This segmentation allows the location server to handle different device types through standardized interfaces while maintaining independent measurement and processing paths, thereby reducing overall system complexity through modular organization.
Solution Approach 2:
The location server acts as an intermediary that manages the complexity of joint positioning. It receives positioning measurements from both UE and RFID devices, processes them through unified algorithms, and generates location estimates. This intermediary role simplifies the interaction between different device types by providing a centralized coordination point that handles signaling, measurement collection, and position calculation, thereby reducing the complexity burden on individual devices.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces power consumption and resource usage by enabling simultaneous positioning of both the UE and ambient RFID devices, improving the efficiency of wireless communication systems.
Implementation Method 1
obtaining one or more second positioning measurements of one or more backscattered signals of the one or more reference signals during the positioning session, wherein the one or more backscattered signals are transmitted by one or more ambient radio frequency identification (RFID) devices
Data Source
AI summary
Disclosed are techniques for wireless communication. In an aspect, a first network node obtains one or more first positioning measurements of one or more reference signals transmitted by one or more second network nodes during a positioning session between a user equipment (UE) and a location server, and obtains one or more second positioning measurements of one or more backscattered signals of the one or more reference signals during the positioning session, wherein the one or more backscattered signals are transmitted by one or more ambient radio frequency identification (RFID) devices.