PRS Configuration via LMF for 5G Positioning Accuracy
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Solution Overview
Problem
Current 5G mobile communication systems face challenges in providing effective positioning services, particularly in next-generation wireless communication systems, due to limitations in configuring and managing positioning reference signals (PRS) efficiently.
Innovation Solution
A method and device that involve an entity performing a location management function (LMF) in a wireless communication system, which receives an auxiliary information request message from a terminal, determines PRS configuration information based on the transmission period of the PRS, and transmits a reference signal configuration request message to the terminal, enabling optimized PRS configuration for improved positioning services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If positioning reference signal configuration is optimized for next-generation wireless communication systems, then positioning accuracy is improved, but system complexity increases
Solution Approach 1:
The patent segments the positioning reference signal configuration into multiple independent parameters including transmission period, frequency offset, time offset, and resource element indices. Each parameter can be independently configured and optimized, allowing the system to achieve high positioning accuracy without overwhelming complexity by breaking down the configuration into manageable segments.
Solution Approach 2:
The patent introduces dynamic configuration mechanisms where the LMF can adjust PRS parameters based on real-time positioning requirements. The transmission period, frequency offset, and time offset are configured dynamically rather than statically, enabling the system to adapt to varying positioning accuracy demands while maintaining manageable complexity through on-demand adjustment.
2Loss of time
If positioning reference signal transmission period is reduced to improve positioning speed, then latency is reduced, but signal transmission reliability deteriorates
Solution Approach 1:
The patent implements periodic PRS transmission with configurable transmission periods that can be dynamically adjusted. By using periodic action with optimized period values, the system achieves fast positioning responses when needed while maintaining sufficient transmission frequency to ensure signal reliability. The periodic structure allows the system to balance between latency reduction and reliability maintenance through parameter optimization.
Solution Approach 2:
The patent employs parameter changes by allowing the LMF to adjust the PRS transmission period, frequency offset, and time offset based on positioning requirements. When low latency is critical, the transmission period is reduced; when reliability is paramount, the period is increased or additional resource elements are allocated. This dynamic parameter adjustment resolves the contradiction between speed and reliability.
3Adaptability or versatility
If multiple positioning reference signal parameters are configured to support diverse positioning services, then service adaptability is improved, but configuration complexity increases
Solution Approach 1:
The patent creates a universal PRS configuration framework that can support multiple positioning services (downlink positioning, uplink positioning, two-way ranging) through a single set of configurable parameters. The same parameter structure (transmission period, frequency offset, time offset, resource element indices) serves different positioning methods, eliminating the need for separate configuration systems for each service type and reducing overall complexity while maintaining high adaptability.
Solution Approach 2:
The patent implements preliminary configuration where the LMF pre-configures PRS parameters based on expected positioning requirements before actual positioning operations. By performing configuration in advance and establishing default parameter sets for different service types, the system reduces real-time configuration complexity while maintaining the ability to adapt to diverse positioning services through pre-established parameter options.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method of a UE in a wireless communication system is provided. The method of the UE comprises: receiving, from a network entity including a location management function (LMF), pre-defined positioning reference signal (PRS) configuration information; transmitting, to the network entity, a request for an on-demand PRS, wherein the request for the on-demand PRS includes periodicity information associated with a subcarrier spacing (SCS) of a synchronization signal block (SSB); and in response to transmitting the request for the on-demand PRS, receiving, from the network entity, PRS configuration information.