Beam Positioning via Angular Difference Measurements
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Solution Overview
Problem
Current positioning technologies face challenges in achieving high accuracy in non-line-of-sight radio propagation environments, particularly in scenarios where direct communication links between user equipment and network nodes are interrupted, such as in tunnels or dense urban areas, leading to poor positioning accuracy and service interruptions.
Innovation Solution
The implementation of target node-based angular difference (TAD) measurements and enhanced positioning reporting mechanisms, combined with anchor node-based angular difference (AAD) and time difference measurements, to accurately localize user equipment in non-line-of-sight scenarios by reconstructing the geometry of the network and accounting for channel obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct communication link between UE and network node is used for positioning, then positioning service is available, but positioning accuracy deteriorates in non-line-of-sight environments
Solution Approach 1:
The patent introduces anchor nodes as intermediary elements to facilitate positioning in non-line-of-sight conditions. Anchor nodes receive downlink signals from network nodes and measure angular differences between uplink and downlink beam directions, providing indirect positioning information that enables accurate location estimation even when direct UE-network communication is blocked or degraded.
2Measurement precision
If beam-based positioning measurements are implemented, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent employs preliminary action by pre-configuring the network node with beam direction information and positioning measurement parameters before actual positioning measurements are taken. The network node stores configuration data about beam directions and uses this pre-established information to calculate angular differences, eliminating the need for complex real-time configuration and reducing overall system complexity.
3Measurement precision
If multiple anchor nodes are connected with target node via uplink and downlink beams, then positioning accuracy in NLoS environments is improved, but measurement configuration complexity increases
Solution Approach 1:
The patent applies universality by designing a multi-functional measurement configuration that serves multiple purposes. The same beam direction information and angular difference measurements used for positioning also enable the system to characterize channel obstacles and reconstruct network geometry, allowing a single configuration framework to handle multiple positioning challenges simultaneously.
Data Source
AI summary
Various example embodiments relate to positioning of a target node. A positioning report may comprise positioning assistance measurements from the target node and at least one anchor node, wherein the positioning assistance measurements are associated with angular differences between a pair of uplink and/or downlink transmission and/or reception beam directions. Apparatuses, methods, and computer pro-grams are disclosed.