Low-Power Wake-Up Receiver Positioning With Adaptive DL-PRS Priority

The patent segments the positioning reference signal reception into two parts: LP-PRS received by the low-power wake-up receiver for initial positioning, and DL-PRS received by the main receiver for enhanced accuracy. This segmentation allows the system to use the appropriate receiver capability for each positioning requirement, reducing overall power consumption while maintaining the ability to achieve high accuracy when needed.

The patent implements preliminary action by having the UE receive and measure LP-PRS using the low-power wake-up receiver before activating the main receiver for DL-PRS measurement. The assistance data is prepared in advance with association configurations that link LP-PRS and DL-PRS, enabling the UE to efficiently determine whether to activate the main receiver based on the initial LP-PRS measurements, thus avoiding unnecessary power consumption.

The patent applies preliminary action by having the network node provide assistance data in advance that includes association configurations between multiple sets of LP-PRSs and their corresponding DL-PRSs. The UE uses this pre-configured assistance data to efficiently manage and prioritize measurements without having to complexly process and correlate multiple signal sets in real-time, thus reducing measurement management complexity while maintaining the ability to achieve high positioning accuracy.

The patent introduces an intermediary mechanism through the association configuration in assistance data, which acts as a mediator between LP-PRS and DL-PRS from different network nodes. This association configuration pre-establishes the relationships and priorities, allowing the UE to seamlessly manage multiple measurement sets without directly handling the complex coordination logic, thereby reducing device complexity while enabling multi-node positioning for improved accuracy.

The patent implements preliminary action by first having the UE measure LP-PRS using the low-power wake-up receiver and evaluate the positioning accuracy sufficiency based on measured parameters. Only when the LP-PRS measurements indicate that enhanced accuracy is needed does the UE activate the main receiver for DL-PRS measurement. This preliminary evaluation step prevents unnecessary main receiver activation, thus reducing overall power consumption while maintaining the ability to enhance accuracy when required.

The patent applies dynamics by making the receiver activation state changeable based on positioning requirements. The UE dynamically determines whether to activate the main receiver based on the measured LP-PRS quality and positioning accuracy needs, rather than continuously operating the high-power main receiver. This dynamic approach allows the system to adapt power consumption to actual positioning requirements, enhancing accuracy only when necessary.