Positioning SRS Transmission in RRC_INACTIVE with BWP Configuration
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Solution Overview
Problem
Existing mobile communication systems face challenges in accurately and efficiently performing positioning, particularly in RRC_INACTIVE states, due to limitations in transmitting sounding reference signals (SRS) and bandwidth part (BWP) configurations, which affect the accuracy and efficiency of location estimation in 5G networks.
Innovation Solution
A method and apparatus for transmitting UECapabilityInformation, provideCapabilities, receiving ProvideAssistanceData, and sending positioning SRS in RRC_INACTIVE state, with specific configurations for SRS and BWP to enhance positioning accuracy and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If positioning SRS transmission is enabled in RRC_INACTIVE state, then positioning capability is improved, but device complexity increases
Solution Approach 1:
The network configures SRS transmission parameters and BWP settings in advance before the UE enters RRC_INACTIVE state. This preliminary configuration allows the UE to perform positioning measurements without complex real-time decision-making, thereby improving positioning capability while minimizing device complexity during the inactive state
Solution Approach 2:
The RRCRelease message serves as an intermediary carrier that conveys positioning configuration information from the network to the UE. This intermediary mechanism enables positioning functionality in RRC_INACTIVE state without requiring complex direct communication protocols, thus improving reliability while controlling device complexity
2Measurement precision
If multiple BWP configurations are provided for positioning, then positioning accuracy is improved, but information processing complexity increases
Solution Approach 1:
The patent divides the positioning configuration into multiple Bandwidth Parts (BWPs), each optimized for specific positioning scenarios. By segmenting the frequency resources into distinct BWPs with different characteristics, the system achieves higher positioning accuracy through selective BWP usage while managing information processing complexity through structured organization
Solution Approach 2:
Different BWP configurations are assigned with locally optimized parameters (frequency ranges, subcarrier spacings, cyclic prefixes) tailored to specific positioning requirements. This local quality approach allows each BWP to be optimized for particular measurement scenarios, improving overall positioning accuracy while maintaining manageable complexity through specialized configurations
3Productivity
If SRS transmission is configured in RRC_INACTIVE state, then positioning efficiency is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic SRS transmission in RRC_INACTIVE state with configurable periods and offsets. Instead of continuous transmission, SRS is sent at specific periodic intervals, which improves positioning efficiency by providing regular measurement opportunities while significantly reducing energy consumption compared to continuous transmission modes
Solution Approach 2:
The system dynamically adjusts SRS transmission parameters (period, offset, bandwidth, power) based on positioning requirements and UE state. By changing these parameters adaptively, the system optimizes the balance between positioning efficiency and energy consumption, enabling efficient positioning when needed while conserving energy during extended inactive periods
Data Source
AI summary
A method and apparatus for positioning in a mobile communication system are provided. Method for positioning includes transmitting a UECapabilityInformation, transmitting a provideCapabilities, receiving a ProvideAssistanceData, receiving a RRCRelease and transmitting a positioning SRS in RRC_INACTIVE state. The RRCRelease includes a first information and a second information, the first information is related to a configuration of SRS in RRC_INACTIVE and the second information is related to a BWP.