Radio Network Node Cell Change Detection for Positioning QoS
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Solution Overview
Problem
Current LTE standards lack techniques for ensuring positioning Quality of Service (QoS) during cell changes in both carrier-aggregation and non-carrier-aggregation systems, and there is no standardized method for optimizing uplink positioning architecture.
Innovation Solution
Implement methods in radio network nodes to detect cell changes and inform positioning nodes, allowing for selective restart of uplink positioning measurements and providing new or updated transmission configuration data to ensure continued accurate positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If uplink positioning measurements are continuously performed during cell changes, then positioning accuracy is maintained, but positioning quality-of-service deteriorates due to measurement failures and QoS violations
Solution Approach 1:
The patent applies preliminary action by detecting cell changes before they affect positioning measurements. The radio network node monitors for cell change events (such as handovers or cell reconfigurations) and proactively informs the positioning node, allowing the positioning measurements to be restarted or adjusted before quality degradation occurs. This preventive approach maintains both measurement accuracy and QoS reliability.
Solution Approach 2:
The patent implements feedback by establishing a communication loop where the radio network node continuously monitors cell status and provides real-time information to the positioning node about cell changes. The positioning node uses this feedback to dynamically adjust measurement configurations, ensuring that positioning accuracy is maintained while preventing QoS violations through timely responses to cell change events.
2Reliability
If cell change detection and notification mechanisms are implemented, then positioning QoS is maintained, but system complexity increases
Solution Approach 1:
The patent applies universality by designing the cell change detection and notification mechanism to serve multiple purposes: it maintains positioning QoS, provides network optimization data, and enables coordinated multi-point operations. The same infrastructure used for regular cell management is leveraged for positioning purposes, avoiding the need for separate dedicated systems and thereby limiting the increase in overall system complexity.
Solution Approach 2:
The patent implements self-service by enabling the radio network node to automatically detect cell changes and generate notifications without requiring external intervention. The system uses existing network protocols and monitoring capabilities to autonomously identify cell change events and communicate them to the positioning node, reducing the operational burden and minimizing the effective complexity of the QoS maintenance mechanism.
3Productivity
If uplink transmission configurations are adaptively adjusted during cell changes, then positioning performance is improved, but control complexity increases
Solution Approach 1:
The patent applies dynamics by implementing adaptive uplink transmission configurations that automatically adjust parameters such as power levels, timing advance, and resource allocation based on real-time cell change conditions. The system dynamically modifies transmission characteristics in response to cell handovers or reconfigurations, improving positioning performance while using predefined adjustment rules to keep control complexity manageable.
Solution Approach 2:
The patent implements parameter changes by modifying specific uplink transmission parameters (power, timing, frequency resources) in response to cell changes. Rather than redesigning the entire transmission system, the patent adjusts key parameters within existing configurations, improving positioning performance through targeted parameter optimization while minimizing the increase in control complexity.
Data Source
AI summary
Methods in a radio network node for assisting a positioning node during positioning of a target wireless device, wherein said positioning is based on radio measurements of uplink radio signals transmitted by the target wireless device, are disclosed. Corresponding radio network node apparatus are also described. An example method begins with detecting (210), at the radio network node, a cell change for the target wireless device. In response to the detected cell change, the radio network node selectively informs (230) a positioning node of the cell change. In some embodiments, the radio network node informs the positioning node only when there is a change in the transmission configuration in at least one cell or when measurements of the uplink radio signals cannot continue.