Index-Based Measurement Mapping for Wireless Positioning
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Solution Overview
Problem
Current wireless communication networks face challenges in identifying and separating transmission points with the same Physical Cell Identity (PCI), particularly in scenarios with combined cells or Terrestrial Beacon Systems, which affects positioning accuracy and efficiency.
Innovation Solution
Implementing index-based reporting and mapping of measurement information, where wireless devices monitor positioning reference signals from multiple transmission points, each associated with a unique index, allowing the core network node to differentiate and map measurements to the correct transmission point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If transmission points with the same PCI are not differentiated, then signaling complexity is reduced, but positioning accuracy deteriorates
Solution Approach 1:
The patent segments the identification process by introducing index-based reporting that divides transmission point identification into two parts: PCI (physical cell identity) and an additional index. This segmentation allows differentiation between transmission points with the same PCI while maintaining signaling efficiency, as the index provides the additional discrimination needed for accurate positioning without requiring complete re-identification of each transmission point.
Solution Approach 2:
The patent introduces an index as an intermediary element between the PCI and the full transmission point identification. This index acts as a mediator that enables the core network node to distinguish between multiple transmission points sharing the same PCI, thereby resolving the positioning accuracy issue while keeping the signaling overhead minimal compared to using full identification data.
2Measurement precision
If index-based reporting is implemented, then positioning accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by making the index-based differentiation local to the wireless device and core network node interaction. The index is generated and used locally in the positioning context without requiring changes to the overall network architecture or other devices, thus improving positioning accuracy while limiting the complexity increase to only the devices directly involved in the positioning process.
3Productivity
If transmission points are not separated, then network efficiency is maintained, but positioning performance deteriorates
Solution Approach 1:
The patent implements partial action by applying index-based differentiation only where needed for positioning purposes, rather than separating all transmission points throughout the network. This allows the network to maintain its existing efficient structure for general operations while introducing the necessary differentiation specifically for positioning measurements, thus preserving network efficiency while improving positioning performance.
Data Source
AI summary
A core network node (302) and a method therein. The core network node, a transmission point (308,312) and a wireless device (310) operate in a wireless communications network (300). The core network node manages at least one set of transmission points, wherein each transmission point is associated with a respective index. Further, the core network node receives, from the wireless device, measurement information and an index, and maps the measurement information to a transmission point based on the received index and an association, which association associates a transmission point to an index that is unique for the wireless device.