Location Server Assistance Data for RAN Sharing Positioning
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Solution Overview
Problem
In wireless communication systems, the location server does not typically factor in the type of radio access network (RAN) serving a user equipment (UE) when determining positioning reference signals, leading to suboptimal position estimation accuracy and latency.
Innovation Solution
Implement mechanisms for signaling RAN sharing status information from UEs or RAN nodes to a location server, enabling the server to provide assistance data tailored to the specific RAN type, thereby improving position estimation accuracy and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the location server does not factor in RAN type when determining positioning reference signals, then the system operation is simpler, but position estimation accuracy deteriorates
Solution Approach 1:
The patent segments the positioning assistance data into RAN-specific types (e.g., RAN-type-1 assistance data, RAN-type-2 assistance data) tailored to different radio access network configurations. This segmentation allows the location server to provide customized positioning reference signal configurations for each RAN type, thereby improving position estimation accuracy without significantly increasing overall system complexity through structured data organization.
Solution Approach 2:
The patent changes the parameters of positioning assistance data based on RAN type characteristics. Different RAN types receive different sets of parameters such as positioning reference signal frequency, time resources, and signal patterns. This parameter customization enables optimal position estimation for each RAN type while maintaining manageable system complexity through standardized parameter structures.
2Loss of time
If the location server does not factor in RAN type when determining positioning reference signals, then the processing is faster, but position estimation latency increases
Solution Approach 1:
The patent implements preliminary action by having the location server pre-determine and store RAN-type-specific assistance data templates before actual positioning requests. When a positioning request arrives, the server can quickly retrieve and apply the appropriate pre-configured assistance data for the specific RAN type, significantly reducing position estimation latency while avoiding the complexity of real-time analysis of RAN characteristics.
Solution Approach 2:
The patent introduces dynamic adaptation where the location server dynamically selects and applies appropriate assistance data based on the detected RAN type. This dynamic approach allows the system to optimize positioning performance for different RAN configurations without requiring complex manual configuration, balancing processing speed and adaptability.
Data Source
AI summary
Aspects of the disclosure are directed to signaling, to a location server that receives an indication of radio access network (RAN) sharing status information associated with a communications network serving a user equipment (UE). In an aspect, the location server may receive the indication from the UE itself or a RAN node associated with the communications network. In an aspect, the location server may provide assistance data to the UE that is associated with a position estimation session of the UE and is based on the RAN sharing status information. Such aspects may provide various technical advantages, such as improved position estimation latency, accuracy, etc., based on the location server factoring the RAN sharing status information into the assistance data provided to the UE.