Relay Node System Information Update Timing
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Solution Overview
Problem
Relay nodes in wireless communication systems face challenges in receiving and applying system information changes due to their configuration, which can disrupt ongoing communications and increase complexity, especially when they cannot receive notifications or changes during uplink time slots.
Innovation Solution
A relay node with a system information processor that determines whether to apply received system information changes immediately or at a later time, classifying changes as fundamental or non-fundamental to minimize complexity and preserve communications, and using preconfigured rules or control indicators from the base station to make this determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If relay nodes receive system information changes during uplink time slots, then system information can be updated promptly, but ongoing communications are disrupted and complexity increases
Solution Approach 1:
The patent segments system information changes into two categories: fundamental changes (affecting system operation) and non-fundamental changes (not affecting system operation). This segmentation allows different handling strategies - fundamental changes are applied immediately even during uplink slots, while non-fundamental changes wait for appropriate timing, thus resolving the contradiction between prompt updates and communication stability.
Solution Approach 2:
The patent introduces dynamic decision-making at relay nodes based on the type of system information change received. The relay node dynamically determines whether to apply changes immediately or defer application based on whether the change is fundamental or non-fundamental, allowing flexible adaptation to different scenarios and resolving the rigid contradiction between immediate updates and communication preservation.
2Productivity
If relay nodes apply system information changes immediately upon reception, then update speed increases, but ongoing communications may be fatally disrupted
Solution Approach 1:
By segmenting system information changes into fundamental and non-fundamental types, the patent enables selective immediate application. Only fundamental changes are applied immediately at relay nodes, while non-fundamental changes are deferred, thus achieving fast updates where critical while preserving communications where possible.
Solution Approach 2:
The patent applies different quality levels of handling to different types of system information changes. Fundamental changes receive immediate local application at relay nodes for fast propagation, while non-fundamental changes receive deferred application, creating localized quality differentiation that optimizes both speed and reliability.
3Reliability
If relay nodes defer all system information changes until modification periods, then communication stability is maintained, but update efficiency decreases
Solution Approach 1:
The patent segments the deferred application strategy based on change type. Non-fundamental changes are deferred to modification periods to maintain stability, while fundamental changes are applied immediately regardless of modification period timing, thus achieving differentiated efficiency while maintaining overall stability.
Solution Approach 2:
The patent introduces dynamic switching between deferred and immediate application based on the fundamental nature of changes. This dynamic approach allows the system to maintain stability for non-critical updates while achieving high efficiency for critical updates, resolving the contradiction between uniform stability and variable efficiency.
4Reliability
If relay nodes use dedicated channels to receive system information changes, then reception reliability improves, but determination of appropriate application time becomes more complex
Solution Approach 1:
The patent segments the application timing decision into two simple categories based on change type: immediate application for fundamental changes and deferred application for non-fundamental changes. This segmentation simplifies the decision complexity while maintaining high reception reliability through dedicated channels.
Solution Approach 2:
Instead of having complex rules determine when to apply changes, the patent inverts the approach by having the change type itself dictate the application timing. Fundamental changes inherently require immediate application, while non-fundamental changes inherently allow deferred application, simplifying the decision logic while maintaining reliability.
Data Source
AI summary
Teachings herein include a base station and a relay node for propagating system information changes from the base station to the relay node. Upon receiving changes from the base station, the relay node advantageously determines whether to apply the changes immediately or to defer application until a set time period. The relay node then applies the changes at a time in accordance with that determination. In some embodiments, the relay node employs deferred application for fundamental changes (those changes that would fatally disrupt ongoing communications if applied before the set time period), but employs immediate application for non-fundamental changes in order to minimize relay node complexity. Regardless, the relay node may make the determination based on preconfigured rules, or on control indicators received from the base station. Correspondingly, the base station may generate the control indicators to explicitly direct the relay node to employ immediate application or deferred application.