On-Demand System Information Requests in RRC Connected State
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Solution Overview
Problem
Existing wireless communication systems lack efficient mechanisms for on-demand system information requests, particularly in the radio resource control connected state, leading to inefficiencies and potential delays in acquiring necessary system information.
Innovation Solution
Implementing a configuration mechanism that enables on-demand system information requests by providing an enable indication for the radio resource control connected state, allowing UEs to request specific system information messages when needed, and facilitating dedicated or broadcast transmission based on network capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system information is broadcast continuously to all user equipment, then all UEs can access system information reliably, but network signaling overhead and energy consumption increase
Solution Approach 1:
The network pre-configures UEs with system information validity timers and on-demand request mechanisms during initial connection or idle state transitions. UEs are prepared with the knowledge of when to request system information updates, avoiding continuous broadcasting while ensuring timely access when needed.
Solution Approach 2:
UEs autonomously determine when they need system information by monitoring their own state transitions (idle to connected, handover events, configuration changes) and self-initiate on-demand requests without waiting for network-wide broadcasts, reducing unnecessary signaling while maintaining reliability.
2Loss of energy
If system information is transmitted on-demand only, then network resources are optimized, but UEs may experience delays in acquiring necessary information
Solution Approach 1:
The network pre-configures UEs with system information validity timers and on-demand request mechanisms during initial connection or idle state transitions. UEs are prepared with the knowledge of when to request system information updates, avoiding continuous broadcasting while ensuring timely access when needed.
Solution Approach 2:
UEs provide feedback to the network about their system information needs based on their operational state and requirements. The network uses this feedback to prioritize and schedule on-demand transmissions, ensuring that critical information is delivered promptly while optimizing resource usage for less urgent requests.
3Ease of operation
If all user equipment receives system information through broadcast, then information distribution is simplified, but signaling overhead increases
Solution Approach 1:
System information is segmented into critical broadcast elements (maintained for all UEs) and on-demand elements (transmitted only to requesting UEs). This segmentation allows the network to maintain simple broadcast mechanisms for essential information while using targeted unicast transmissions for UE-specific requirements, reducing overall signaling overhead.
Solution Approach 2:
The system design allows a single system information framework to serve multiple functions: broadcast for common information, on-demand unicast for specific UE needs, and configurable timers for update management. This multi-functional approach replaces the need for separate mechanisms while reducing total signaling volume.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for enabling on-demand system information requests. One method (600) includes receiving (602) configuration information corresponding to an on-demand system information request procedure, wherein: the configuration information corresponds to a radio resource control connected state; the configuration information comprises an enable indication; and the enable indication indicates whether the on-demand system information request procedure is enabled for the radio resource control connected state.