Passive Distributed Element PRS Control for Positioning Accuracy
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Solution Overview
Problem
In wireless communication systems, passive distributed elements can cause confusion in determining device position by transmitting positioning reference signals (PRS) and common reference signals (CRS) that are associated with the access point, leading to incorrect positioning results.
Innovation Solution
The system controls passive distributed elements to refrain from transmitting PRSs, allowing wireless devices to only measure PRSs from the access point, thereby mitigating confusion and ensuring accurate positioning by ignoring CRSs from these elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If passive distributed elements transmit positioning reference signals (PRS), then coverage area is extended, but positioning accuracy deteriorates due to confusion between access point signals and passive element signals
Solution Approach 1:
The patent extracts the harmful function (transmitting PRS) from the passive distributed elements while preserving their useful function (extending coverage). The access point sends a configuration message to the passive elements instructing them to refrain from transmitting PRS, thereby eliminating positioning confusion while maintaining coverage extension capabilities
Solution Approach 2:
The patent changes the transmission parameter of passive distributed elements by dynamically controlling them to refrain from transmitting PRS based on positioning requirements. The access point configures the passive elements to adjust their transmission behavior, switching from transmitting PRS to not transmitting PRS when positioning accuracy is prioritized
2Area of stationary object
If passive distributed elements transmit common reference signals (CRS), then signal coverage is improved, but positioning reliability deteriorates due to incorrect association with access point location
Solution Approach 1:
The patent extracts the harmful effect of CRS transmission from passive distributed elements in the context of positioning. By configuring passive elements to not transmit CRS, the system eliminates the source of confusion that would cause devices to incorrectly associate signal origin with access point location, while maintaining coverage through other means
3Power
If wireless devices measure both PRS and CRS from passive distributed elements, then signal strength is improved, but positioning accuracy deteriorates due to inability to distinguish signal sources
Solution Approach 1:
The patent converts the potentially harmful effect of passive distributed element transmissions into a beneficial outcome. By having passive elements transmit signals that are explicitly excluded from positioning measurements through configuration messages, the system transforms what would be confusing signals into a controlled situation where the exclusion criterion itself becomes the solution to positioning accuracy
Data Source
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AI summary
Systems and methodologies are described that facilitate transmitting positioning reference signals (PRS) differently for passive distributed elements. PRSs for passive distributed elements can be transmitted over disparate resources than those utilized for PRSs at a related access point, using different symbol sequences, and/or the like. In this regard, wireless devices can differentiate between PRSs from access points and those from passive distributed elements, which can mitigate confusion for processes involving such RSs, such as position determining. Alternatively, passive distributed elements can refrain from transmitting PRSs, and a corresponding access point can indicate to wireless devices to only determine positioning based on PRSs. Thus, the wireless devices can utilize the PRSs transmitted from the access point (and not other reference signals transmitted from the passive distributed element) to determine a position.