On-Demand System Information Signaling in Wireless Networks
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Solution Overview
Problem
Current 4G wireless communication systems face inefficiencies in transmitting system information, particularly in small cell deployments where periodic broadcasting of Master Information Block (MIB) and System Information Blocks (SIBs) leads to resource wastage and increased energy consumption, and users must reacquire system information upon cell changes, resulting in power consumption issues.
Innovation Solution
The system categorizes system information into essential and other categories, where essential information is periodically broadcasted, and other information is provided on demand, allowing users to request specific SIBs or sets of SIBs through random access preambles, reducing unnecessary resource usage and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system information is periodically broadcasted in all cells, then all users can acquire necessary information, but resource wastage and energy consumption increase significantly
Solution Approach 1:
The patent applies local quality by differentiating system information broadcasting based on cell type. Macro cells broadcast complete system information periodically to ensure all users can acquire necessary information, while small cells provide system information only upon user request, reducing energy consumption and resource wastage in small cell deployments where periodic broadcasting is unnecessary
2Reliability
If system information is broadcasted periodically, then users can always access up-to-date information, but resource utilization decreases
Solution Approach 1:
The patent implements dynamics by making system information provision adaptive rather than static. Instead of uniformly periodic broadcasting, the system dynamically adjusts information delivery based on user presence and requests. Small cells transition from passive periodic broadcasting to active on-demand provision, optimizing resource utilization while maintaining information availability when needed
3Reliability
If users reacquire system information upon cell changes, then users have current cell-specific information, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by having users request system information in advance when entering a small cell coverage area, rather than waiting for periodic broadcasts or reacquiring upon cell change. This allows users to obtain cell-specific information proactively, reducing the need for frequent reacquisition and lowering power consumption during mobility
Data Source
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AI summary
The present disclosure relates to a method for receiving and transmitting system information, SI, by a base station, BS, in a wireless communication system. The present disclosure also relates to a user equipment, UE, for receiving system information, SI, in a wireless communication system, and a base station, BS, for transmitting system information, SI, in a wireless communication system.