On-Demand System Information Acquisition in Wireless Networks
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Solution Overview
Problem
The excessive overhead of system information (SI) in wireless communication systems, particularly due to the periodic broadcasting of all SI components, including the master information block (MIB) and multiple SI blocks (SIBs), becomes a significant issue as the diversity of services and terminal types evolve, leading to inefficient resource utilization.
Innovation Solution
A method for on-demand SI obtaining, where user equipment (UE) receives scheduling information from a network side device to determine and request only the necessary SI, using a MAC control element for message transmission, thereby reducing unnecessary data reception and conserving transmission resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all SI components (MIB, SIB1-SIB20) are periodically broadcasted in wireless communication systems, then system information completeness and availability are improved, but SI overhead and resource consumption increase significantly
Solution Approach 1:
The patent segments the system information into different categories (minimum SI and other SI) and implements different delivery mechanisms for each. Minimum SI is periodically broadcasted to ensure completeness, while other SI is delivered on-demand based on UE requests, thus reducing overall SI overhead while maintaining information completeness.
Solution Approach 2:
The patent introduces dynamic on-demand SI delivery mechanism where the network side device determines whether to broadcast other SI based on UE requests and network conditions. This dynamic approach allows the system to adapt SI broadcasting to actual needs, reducing unnecessary SI overhead while ensuring information availability when required.
2Loss of information
If all SI components are periodically broadcasted to ensure information availability, then system information accessibility is improved, but transmission resource utilization deteriorates
Solution Approach 1:
The patent divides SI into minimum SI (periodically broadcasted) and other SI (on-demand delivery). This segmentation ensures that critical information remains always available while reducing transmission resources consumed by non-critical information that can be delivered only when requested.
Solution Approach 2:
The patent maintains periodic broadcasting for minimum SI to ensure essential information availability, while replacing periodic broadcasting with on-demand delivery for other SI. This selective periodic action reduces overall transmission resource consumption while preserving availability of critical system information.
3Adaptability or versatility
If comprehensive SI broadcasting is implemented to support diversified services and terminal types, then system adaptability is improved, but SI overhead increases
Solution Approach 1:
The patent implements dynamic on-demand SI delivery that adapts to different UE requirements and network conditions. The network side device selectively broadcasts other SI based on actual UE requests, providing adaptability for diversified services and terminal types without the overhead of broadcasting all possible SI components continuously.
Data Source
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AI summary
A system information obtaining method, a UE and a network side device are provided. The method includes: receive first scheduling information of on-demand SI sent by a network side device; obtain the on-demand SI sent by the network side device based on the first scheduling information.