Selective PRS Occasion Cancellation for 5G Resource Efficiency
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Solution Overview
Problem
Conventional wireless communication systems face challenges in efficiently managing positioning reference signal (PRS) occasions, leading to suboptimal performance in 5G networks, particularly in terms of spectral efficiency and latency.
Innovation Solution
The implementation of selective cancellation of on-demand positioning reference signal (PRS) occasions, allowing for dynamic adjustment and optimization of PRS configurations to align with network demands, thereby enhancing spectral efficiency and reducing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If PRS occasions are transmitted frequently to improve positioning accuracy, then positioning precision is improved, but spectral efficiency deteriorates due to increased resource occupation
Solution Approach 1:
The patent implements dynamic PRS occasion cancellation where the network can selectively cancel specific PRS occasions based on current positioning requirements. This allows the system to adapt PRS transmission dynamically - transmitting PRS frequently when high positioning accuracy is needed, and canceling PRS transmissions when positioning updates are not required, thereby resolving the contradiction between positioning accuracy and spectral efficiency
Solution Approach 2:
The system changes the transmission parameter of PRS occasions from a fixed periodic transmission to a dynamically adjustable transmission pattern. By introducing cancellation indicators that can selectively disable specific PRS occasions, the system optimizes the balance between positioning accuracy (requiring frequent PRS) and spectral efficiency (requiring reduced PRS transmission) based on actual network conditions
2Loss of time
If PRS occasions are transmitted continuously to reduce positioning latency, then positioning speed is improved, but resource utilization deteriorates due to unnecessary transmissions
Solution Approach 1:
The patent extracts and removes unnecessary PRS occasions from the continuous transmission sequence. By introducing a cancellation mechanism that selectively takes out (cancels) specific PRS occasions when positioning updates are not needed, the system reduces resource utilization while maintaining low positioning latency through on-demand PRS transmission
Solution Approach 2:
The system transforms continuous PRS transmission into a periodic but selectively cancellable action pattern. PRS occasions are transmitted periodically when needed, but can be canceled in between based on positioning requirements, optimizing both response time and resource usage by avoiding continuous unnecessary transmissions
Data Source
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AI summary
Disclosed are various techniques for wireless communication. In an aspect, a user equipment (UE) receives, from a network entity, a positioning reference signal (PRS) configuration. The UE receives, from a serving base station, a measurement gap (MG) configuration. The UE determines that one or more transmission properties of one or more resources should be modified and transmits PRS modification information to the network entity based on the one or more transmission properties of one or more PRS resources to be modified. The network entity may be a location server or location management function.