Base Station System Information Segmentation for Radio Resource Efficiency
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Solution Overview
Problem
In wireless communication systems, the existing method of broadcasting all System Information Blocks (SIBs) periodically, regardless of necessity, leads to inefficient use of radio resources, especially in small cell deployments where not all UEs require all information for initial access.
Innovation Solution
Implementing a differentiated delivery method where an access node transmits essential and non-essential system information separately, with non-essential information transmitted only upon request from a wireless terminal, using either unicast or broadcast over predetermined radio resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all System Information Blocks (SIBs) are periodically broadcast to ensure all UEs can access the network, then system access reliability is improved, but radio resource efficiency deteriorates
Solution Approach 1:
The patent segments system information into two distinct categories: Type 1 SIBs (essential for initial access) and Type 2 SIBs (non-essential). Type 1 SIBs are periodically broadcast to ensure all UEs can access the network, while Type 2 SIBs are transmitted on-demand only to UEs that request them. This segmentation resolves the contradiction by ensuring reliability for essential information while improving radio resource efficiency for non-essential information.
Solution Approach 2:
The patent extracts Type 2 SIBs from the periodic broadcast mechanism and delivers them through a separate on-demand mechanism. UEs first receive Type 1 SIBs via periodic broadcast, then request Type 2 SIBs individually through random access procedures. This extraction allows the system to maintain broadcast reliability for essential information while eliminating wasteful transmission of non-essential information to all UEs.
2Loss of information
If all SIBs are transmitted periodically to all UEs, then information completeness is improved, but device complexity increases
Solution Approach 1:
The patent introduces dynamic transmission mechanisms where the delivery method adapts based on information type and UE needs. Type 1 SIBs use fixed periodic broadcast, while Type 2 SIBs use dynamic on-demand transmission triggered by UE requests. This dynamic approach maintains information completeness while reducing overall system complexity by matching transmission complexity to actual information requirements.
Solution Approach 2:
The patent implements a feedback mechanism where UEs indicate their information needs through random access requests, and the base station responds by providing specific Type 2 SIBs. This feedback loop ensures information completeness is maintained only for requested data, avoiding the complexity of broadcasting all possible information types to all UEs regardless of need.
3Ease of operation
If periodic broadcast of all SIBs is used, then ease of operation is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent segments the information acquisition process into two simple stages: UEs automatically receive Type 1 SIBs via periodic broadcast without any action required, then request Type 2 SIBs only if needed through a simple random access procedure. This segmentation maintains ease of operation for essential information while dramatically improving resource allocation efficiency by eliminating unnecessary transmissions of non-essential information.
Data Source
AI summary
Techniques, apparatus, and methods are provided in conjunction with differentiated delivery of system information (SI) in a wireless communications network.