Positioning SRS Configuration in RRC_INACTIVE With BWP Release Signaling
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Solution Overview
Problem
Existing 5G communication systems face challenges in implementing accurate terminal positioning, particularly in RRC_INACTIVE state, due to limitations in transmitting sounding reference signals (SRS) and bandwidth part (BWP) configurations, which affect the efficiency and accuracy of positioning methods.
Innovation Solution
A method and apparatus for transmitting UECapabilityInformation, provideCapabilities, and RRCRelease messages in RRC_INACTIVE state, including configurations for SRS and BWP, to enable efficient positioning by enhancing the transmission of SRS and optimizing BWP settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If terminal transmits SRS in RRC_INACTIVE state for positioning, then positioning accuracy is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The network pre-configures SRS transmission parameters and BWP settings while the terminal is in RRC_INACTIVE state, before positioning measurement is actually needed. This preliminary configuration enables the terminal to transmit SRS for positioning without requiring complex real-time signaling exchanges, thus improving positioning accuracy while minimizing signaling overhead and complexity.
2Measurement precision
If terminal transmits SRS in RRC_INACTIVE state, then positioning functionality is enabled, but loss of information increases due to incomplete BWP configuration
Solution Approach 1:
The SRS configuration and BWP parameters are nested within the RRCRelease message that transitions the terminal to RRC_INACTIVE state. This nested structure allows complete positioning-related configuration information to be embedded in the existing release message, enabling SRS transmission in inactive state without losing BWP configuration information or requiring separate signaling messages.
3Productivity
If network configures SRS in RRC_INACTIVE state, then positioning efficiency is improved, but device complexity increases due to additional configuration parameters
Solution Approach 1:
The SRS resource configuration is designed to serve multiple purposes: it enables positioning measurements in RRC_INACTIVE state, maintains uplink synchronization, and provides channel quality information. By making the SRS configuration multi-functional, the patent improves positioning efficiency without requiring separate dedicated configuration mechanisms, thus avoiding additional device complexity.
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 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 includes a information related to a BWP and a information indicating a supplementary uplink.