RedCap UE Positioning With PRS Frequency Hopping
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Solution Overview
Problem
The challenge of improving positioning accuracy for reduced capability (RedCap) UEs in wireless communication systems, which have limited bandwidth support, is addressed by enabling PRS frequency hopping with additional switching time considerations to accommodate RF retuning between adjacent hops, while maintaining low cost and power consumption.
Innovation Solution
The proposed solution involves configuring RedCap UEs with specific RF re-tuning times and measurement period requirements for intra-slot hopping, utilizing factors such as H, H1, H2, and H3 to extend measurement periods based on RF re-tuning times and hopping information, allowing for accurate positioning measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PRS frequency hopping is enabled for RedCap UEs, then positioning accuracy is improved, but additional switching time is required for RF retuning between adjacent hops
Solution Approach 1:
The patent applies preliminary action by pre-configuring the RedCap UE with hopping parameters, RF retuning time information, and measurement period requirements before the actual positioning measurement. The network device provides configuration information including factors H, H1, H2, H3 that define the measurement period extension needed for RF retuning, allowing the UE to prepare appropriately for frequency hopping measurements without ad-hoc delays during the measurement process.
Solution Approach 2:
The patent changes the measurement period parameter dynamically based on the number of hops and RF retuning time requirements. The measurement period is extended by a factor that depends on hopping configuration (factors H, H1, H2, H3), allowing the system to adapt the time parameter to match the specific frequency hopping scenario while maintaining positioning accuracy.
2Measurement precision
If RF retuning time is accommodated in measurement period, then positioning measurement accuracy is maintained, but measurement period duration is extended
Solution Approach 1:
The patent modifies the measurement period parameter based on RF retuning time requirements and hopping configuration. By introducing factors H, H1, H2, H3 that scale the measurement period duration, the system dynamically adjusts the time parameter to accommodate retuning operations while ensuring measurement accuracy is maintained throughout the extended period.
Solution Approach 2:
The measurement period is made dynamic rather than fixed, adapting its duration based on the specific hopping configuration and RF retuning time requirements. This dynamic adjustment allows the system to optimize between measurement accuracy and time efficiency for each specific positioning scenario involving frequency hopping.
Data Source
AI summary
Presented are systems and methods for positioning. A wireless communication device (e.g., a UE) may receive configuration information of a reference signal for positioning from a wireless communication node (e.g., a BS). The wireless communication device may send the reference signal for positioning to the wireless communication node.