UE RRM Procedures for High-Speed 5G NR Handovers
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Solution Overview
Problem
Current 5G-NR networks face challenges in supporting radio resource management (RRM) procedures at high speeds, particularly when user equipment (UE) transitions between different radio access technologies, leading to potential communication failures due to inadequate support for high-speed RRM measurements.
Innovation Solution
The implementation of enhanced RRM measurement capabilities in user equipment (UE) that decode specific system information blocks (SIBs) to determine if target cells support high-speed communications, allowing the UE to refrain from handovers or reselections to cells that cannot handle speeds above a threshold (e.g., 500 km/h), ensuring seamless operation within the 5G NR network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE performs RRM measurements and handovers to all detected cells, then network coverage is maximized, but communication failures occur at high speeds due to inadequate high-speed support in target cells
Solution Approach 1:
The system performs preliminary actions by including high-speed capability indicators in system information blocks (SIBs) before handover decisions are made. This allows the UE to decode SIBs and determine whether target cells support high-speed communications in advance, preventing communication failures before they occur.
Solution Approach 2:
The patent introduces an intermediary mechanism (high-speed capability indicator in SIBs) that mediates between the UE's high-speed communication needs and the target cell's capabilities. This intermediary information enables the UE to make informed handover decisions without requiring complex real-time assessments during the handover process.
2Measurement precision
If UE decodes system information blocks to determine high-speed support, then handover accuracy improves, but measurement and decision time increases
Solution Approach 1:
The patent extracts only the critical high-speed capability indicator from the system information blocks, rather than requiring the UE to decode and analyze entire SIBs. This extraction approach maintains handover decision accuracy by focusing on the essential information needed for high-speed support determination while significantly reducing measurement and processing time.
3Reliability
If network provides detailed cell capability information, then UE can make better handover decisions, but signaling overhead increases
Solution Approach 1:
The patent extracts and transmits only the essential high-speed capability indicator information from cell capability data, rather than providing complete detailed information. This extraction maintains handover decision reliability by providing the critical information needed for high-speed support determination while significantly reducing signaling overhead and information transmission requirements.
Data Source
AI summary
A computer-readable storage medium stores instructions to configure a UE for radio resource management (RRM) measurements in a 5G NR. network, and to cause the UE to perform operations. The operations include decoding RRC signaling. The RRC signaling includes system information associated with an inter-RAT cell of a. target base station. The system information includes an indicator for support of enhanced RRM measurements by the inter-RAT cell. Configuration information from a. source base station is decoded. The configuration information includes a handover instruction for performing a handover from the source base station to the target base station. A determination is made whether to perform the enhanced RRM measurements and the handover based on the indicator.