RRC-State On-Demand System Information Delivery
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Solution Overview
Problem
Existing mobile telecommunications systems face inefficiencies in signaling and resource management due to the periodic broadcast of system information, which leads to increased overhead and suboptimal utilization of radio resources, particularly in the context of 5G technologies with diverse UE capabilities and use cases.
Innovation Solution
A method for transmitting system information on demand based on specific radio resource control connection states, allowing user equipment to request and receive necessary information through optimized transmission schemes tailored to different RRC states, including pre-allocated resources and contention-based approaches, thereby reducing signaling overhead and improving resource efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system information is periodically broadcast to all user equipment, then all UEs can access the information, but signaling overhead increases and radio resources are wasted
Solution Approach 1:
The patent extracts only the necessary system information blocks that UEs actually need based on their RRC connection states and capabilities, rather than broadcasting all system information. The network determines which SIBs to transmit based on UE state (e.g., RRC_IDLE, RRC_CONNECTED) and removes unnecessary information, thereby reducing signaling overhead while maintaining reliability for active UEs.
Solution Approach 2:
The patent applies different system information transmission strategies tailored to local UE conditions. Instead of uniform broadcasting, the network adapts the transmission approach based on individual UE RRC states, capabilities, and information needs, providing customized information delivery that minimizes overhead while ensuring availability where needed.
2Reliability
If system information is broadcast to all UEs including those in RRC_IDLE state, then information is available, but radio resources are suboptimally utilized
Solution Approach 1:
The patent applies partial action by transmitting only the necessary system information blocks to UEs in RRC_IDLE state rather than all system information. The network determines minimal required information based on UE capabilities and connection state, avoiding excessive broadcasting while ensuring sufficient information availability for the UE's current state and needs.
Solution Approach 2:
The patent tailors system information transmission to local UE conditions by considering RRC connection state, UE capabilities, and specific information needs. This localized approach optimizes radio resource utilization by avoiding unnecessary broadcasts to idle UEs while ensuring information availability where actually needed.
3Loss of information
If the network transmits all system information blocks, then complete information is provided, but signaling overhead and collision probability increase
Solution Approach 1:
The patent segments system information into essential and non-essential blocks, and further divides them based on UE RRC connection states. Different SIBs are transmitted to different UE states (e.g., SIB1, SIB2 for RRC_IDLE; SIB3-SIB16 for RRC_CONNECTED), reducing the total signaling overhead while maintaining information completeness for each UE's specific state requirements.
Solution Approach 2:
The patent extracts and transmits only the necessary system information blocks based on UE capabilities and connection state, removing redundant information that would increase signaling overhead and collision probability while maintaining completeness for the UE's operational state.
4Reliability
If periodic broadcasting is used for system information, then all UEs receive updates, but resource efficiency decreases
Solution Approach 1:
The patent dynamically adapts system information transmission based on real-time UE RRC connection states and capabilities rather than using static periodic broadcasting. The network determines optimal transmission timing and content based on current UE state, improving resource efficiency while maintaining reliable information delivery through state-aware scheduling.
Solution Approach 2:
The patent applies different transmission strategies for different UE local states (RRC_IDLE vs. RRC_CONNECTED), optimizing resource efficiency by tailoring broadcast timing and content to actual UE needs rather than using uniform periodic schedules for all UEs.
Data Source
AI summary
A mobile telecommunications system method for transmitting on demand system information to a user equipment includes requesting system information, based on a specific radio resource control connection state, and to transmit system information to the user equipment, based on the system information request.