PRS Resource Reservation by Selective gNB Coverage
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Solution Overview
Problem
The resource efficiency of positioning reference signals (PRS) in 5G networks is inadequate due to unnecessary resource reservation at all network devices within an area, leading to high power consumption and limited capacity for serving user equipment (UE).
Innovation Solution
A method for selectively reserving PRS resources by identifying a set of network devices within a geographical area based on the location and signal quality of user equipment, allowing only these devices to reserve resources for PRS transmission, and dynamically updating this set based on trigger events such as location changes or signal degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all network devices within an area reserve resources for positioning reference signals, then positioning coverage is ensured, but resource efficiency deteriorates and power consumption increases
Solution Approach 1:
The patent applies local quality by differentiating the resource reservation behavior based on the local presence and signal quality requirements of user equipment. Instead of uniform reservation across all network devices, the system selectively reserves resources only for gNBs that have UEs in their coverage area with sufficient signal quality, thereby reducing unnecessary power consumption while maintaining positioning coverage where needed.
Solution Approach 2:
The patent implements partial action by having only a subset of network devices (those with UEs and adequate signal quality) reserve positioning resources, rather than requiring all network devices to participate. This partial reservation approach reduces the overall resource burden and power consumption while still providing sufficient positioning coverage for the active UEs.
2Reliability
If all network devices within an area reserve resources for positioning reference signals, then positioning coverage is ensured, but device capacity to serve user equipment deteriorates
Solution Approach 1:
The system reserves positioning resources selectively based on local conditions - only for gNBs that have user equipment and meet signal quality thresholds. This localized approach prevents resource reservation from consuming the capacity of gNBs that do not serve UEs, thereby preserving device capacity for other services while ensuring positioning coverage where UEs are present.
Solution Approach 2:
By implementing partial resource reservation only for gNBs with active UEs, the patent prevents the excessive action of all gNBs reserving resources regardless of UE presence. This partial action maintains positioning coverage for served UEs while preserving the capacity of gNBs without UEs for other communications.
3Measurement precision
If resources are reserved for positioning reference signals, then positioning accuracy is improved, but resource efficiency deteriorates
Solution Approach 1:
The patent applies local quality by reserving positioning resources only for gNBs that have user equipment and meet signal quality requirements. This localized reservation ensures positioning accuracy for the relevant UEs while avoiding the waste of reserving resources at gNBs without UEs, thereby improving overall resource efficiency while maintaining positioning accuracy where needed.
Solution Approach 2:
The patent implements partial resource reservation for positioning only where necessary (at gNBs with UEs and adequate signal quality), rather than requiring all gNBs to reserve resources. This partial action maintains positioning accuracy for served UEs while significantly improving resource efficiency by eliminating unnecessary reservations at gNBs without UEs.
Data Source
AI summary
Example embodiments of the subject disclosure relate to resource reservation for a positioning reference signal. A first device obtains a configuration indicating a resource for a positioning reference signal. The positioning reference signal is used to position a second device in a first area. The first device selects a set of third devices from a plurality of third devices in the first area. The first device transmits the configuration to the set of third devices for reserving the resource.