Access Node SIB Segmentation for Radio Resource Efficiency
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Solution Overview
Problem
In wireless communication systems, the existing method of periodically broadcasting all System Information Blocks (SIBs) is inefficient, particularly in small cell deployments, as it wastes valuable radio resources.
Innovation Solution
An access node generates a first type SIB indicating whether associated second type SIBs are provided by broadcast or on-demand, and transmits this information to wireless terminals, allowing for differential delivery and efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all SIBs are periodically broadcast to ensure complete system information delivery, then all wireless terminals can obtain necessary information for system access and service usage, but valuable radio resources are wasted especially in small cell deployments where not all terminals need all SIBs
Solution Approach 1:
The patent segments SIBs into two categories: type1 SIBs (essential for initial access) and type2 SIBs (for service usage). Type1 SIBs are broadcast periodically to ensure all terminals receive critical information, while type2 SIBs are delivered on-demand to specific terminals that need them, avoiding unnecessary radio resource consumption for terminals that don't require certain SIBs.
Solution Approach 2:
The patent implements dynamic SIB delivery mechanisms where the transmission mode (broadcast vs. unicast) can change based on terminal needs and network conditions. The network can switch between periodic broadcast for type1 SIBs and on-demand unicast for type2 SIBs, optimizing radio resource usage while ensuring reliability for essential information.
2Ease of operation
If periodic broadcast of all SIBs is used, then system information is always available to terminals entering coverage area, but radio resources are inefficiently utilized in small cell deployments
Solution Approach 1:
The patent divides SIBs into type1 (broadcast) and type2 (on-demand) categories, allowing terminals to easily obtain essential access information through simple broadcast reception, while more specialized SIBs are provided only when specifically requested, improving overall radio resource efficiency without complicating the basic access process.
Solution Approach 2:
The patent introduces an on-demand request mechanism as an intermediary between the network and terminals. When a terminal needs specific type2 SIBs, it sends a request message to the network, which then provides the requested information. This intermediary mechanism allows efficient resource utilization while maintaining ease of operation for essential services.
3Productivity
If on-demand SIB transmission is used to save radio resources, then radio resource efficiency improves, but terminals may not receive all necessary system information for proper system operation
Solution Approach 1:
The patent segments SIBs into type1 (essential for initial access and system operation) and type2 (service-specific). Type1 SIBs are always broadcast periodically to ensure all terminals receive complete essential information, while type2 SIBs are transmitted on-demand only to terminals that specifically need them, achieving both reliability for essential functions and efficiency for supplementary information.
Solution Approach 2:
The patent applies different delivery qualities to different SIB types: type1 SIBs receive high-quality guaranteed periodic broadcast delivery to ensure reliability, while type2 SIBs receive optimized on-demand delivery tailored to specific terminal needs. This local quality differentiation ensures system information completeness for essential operations while maximizing radio resource efficiency.
Data Source
AI summary
A method and apparatus is provided to use a value tag in conjunction with transmission and/or processing of system information in a wireless communication network, specifically in conjunction with second type system information or non-essential type system information. An access node may initiate broadcasting second type system information when the second type information content is updated, in order to avoid multiple on-demand delivery requests from wireless terminals. The access node may compress second type system information to be delivered by broadcast.