Dynamic SI-Window Retransmission for 5G NR User Equipment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current communication systems, particularly in 5G NR, face challenges in achieving reliable and flexible acquisition of system information messages due to static SI-window occasions, which can lead to prolonged latency and inflexibility in handling unsuccessful message receptions.
Innovation Solution
The introduction of additional, dynamically adjustable SI-window occasions for reattempting the broadcast of system information messages, allowing for on-demand retransmissions outside the statically defined time frames, thereby enhancing reliability and robustness without replacing the existing SI-window structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If system information messages are broadcast only in statically defined SI-window occasions, then the broadcasting structure remains simple and predictable, but the system lacks flexibility and reliability when message reception fails, leading to prolonged latency
Solution Approach 1:
The patent introduces dynamically adjustable SI-window occasions that can be triggered on-demand when message reception fails. These additional windows allow the system to adapt to reception failures by providing alternative transmission opportunities, transforming the static SI-window structure into a dynamic one that responds to actual communication conditions.
Solution Approach 2:
The patent modifies the SI-window timing parameters by introducing additional windows with adjustable positions and durations. When reception fails, the system changes the temporal parameters of SI-window occasions, allowing retransmissions at different times rather than being constrained to fixed periodic windows.
2Adaptability or versatility
If additional SI-window occasions are introduced for retransmissions, then reliability and flexibility improve, but the system complexity and scheduling overhead increase
Solution Approach 1:
The patent segments the SI-window structure into primary periodic windows and additional on-demand windows. This segmentation allows the system to maintain the original periodic structure for normal operation while adding separate, conditionally activated windows for retransmission scenarios, reducing the complexity burden of the overall system.
Solution Approach 2:
The additional SI-windows are designed to be dynamically activated only when needed, based on reception success/failure conditions. This dynamic activation approach allows the system to gain adaptability without permanently increasing complexity, as the additional windows remain dormant during normal operation.
3Loss of time
If the UE waits for the next periodic SI-window after unsuccessful reception, then the system maintains simple periodic scheduling, but the latency is prolonged and resource utilization is inefficient
Solution Approach 1:
The patent prepares additional SI-window occasions in advance as part of the system configuration, but they remain inactive until needed. When reception fails, these pre-prepared windows can be activated immediately without requiring complex real-time scheduling decisions, thus reducing latency while maintaining efficient resource utilization.
Solution Approach 2:
The system implements feedback mechanisms where the UE reports reception status, and the base station responds by activating additional SI-windows when failures are detected. This feedback loop enables the system to reduce latency dynamically based on actual reception conditions rather than relying on fixed periodic schedules.
Data Source
AI summary
The present disclosure relates to a mobile terminal, a system and respective methods. The user equipment receives a SI configuration for an SI message, the configuration indicating a periodicity at which the SI message is being broadcasted, determines that receiving the SI message, to be broadcasted in one of plural first time windows that are reoccurring at the indicated periodicity, is unsuccessful, and transmits a SI request for the SI message after determining the unsuccessful receipt of the SI message. The SI request includes an indication of the at least one SI message to be broadcasted. Then, the user equipment receives the at least one SI message within at least one second time window occurs after the one of the plural first time windows and before the next of the first time window that is reoccurring at the indicated periodicity, and determines that receiving the SI message is successful.