User Equipment System Information Reuse Using Value Tags and Area Pointers
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Solution Overview
Problem
The 3GPP standardization for 5G NR systems is incomplete regarding the provision and acquisition of system information by network and user equipment, leading to inefficiencies in power consumption and signaling overhead, particularly in scenarios like handovers where system information reacquisition can be lengthy.
Innovation Solution
Implementing a system information acquisition procedure that utilizes a minimum-system-information message containing a system information index with an area pointer and value tag to determine the validity of additional-system-information messages, allowing UEs to avoid reacquiring system information when it is already valid in adjacent cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UEs reacquire system information in every cell, then system information accuracy is ensured, but power consumption increases and signaling overhead increases
Solution Approach 1:
The patent extracts the essential validation information (value tag and area identifier) from the complete system information, allowing UEs to verify validity without reacquiring the entire system information block. This selective extraction enables accuracy verification while reducing power consumption.
Solution Approach 2:
The patent creates a simplified copy of system information validity indicators (value tag and area identifier) that can be transmitted separately from the full system information. UEs use these copies to validate stored information, avoiding the need to reacquire complete system information and reducing power consumption.
2Reliability
If UEs reacquire system information in every cell, then system information accuracy is ensured, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential validation elements (value tag and area identifier) from the complete system information message. These extracted elements are transmitted to UEs, enabling validation without requiring full system information reacquisition, thus reducing signaling overhead while maintaining accuracy.
Solution Approach 2:
The patent transmits simplified copies of system information validity indicators rather than the complete system information blocks. These copies contain sufficient information for UEs to validate their stored system information, significantly reducing the quantity of signaling data required.
3Adaptability or versatility
If the system information acquisition procedure is standardized, then network compatibility is improved, but flexibility in implementing optimization strategies is reduced
Solution Approach 1:
The patent segments the system information into multiple components: mandatory elements (value tag, area identifier) that ensure compatibility, and optional optimization elements that provide flexibility. This segmentation allows standardization of core functions while preserving implementation flexibility for optimizations.
Solution Approach 2:
The patent introduces dynamic indicators (value tag, area identifier) that allow the system to adapt between different operation modes. Network operators can dynamically choose whether to implement full reacquisition or validation-based optimization, providing flexibility within a standardized framework.
Data Source
AI summary
The present disclosure relates to a user equipment comprising a receiver receiving a minimum-system-information message from a first radio base station. System information for the first radio cell that can be acquired by the UE is carried within the minimum-SI message and one or more additional-SI messages. The minimum-SI message includes system information for accessing the first radio cell and at least one system information index, each of which is associated with one of the additional-SI messages. The SI message index comprises a value tag and an area pointer, the latter pointing to one area already defined. Processing circuitry determines whether the UE had already acquired before the additional-SI message associated with the same value tag and the same area. If the determination is positive, the processing circuitry determines that system information included in said additional-SI message acquired before is applicable to the first radio cell.