System Information Change Indication via Paging DCI
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Solution Overview
Problem
In wireless communication networks, the time required to acquire system information changes is longer than desired, which can lead to inefficiencies and delays, particularly when urgent updates such as warning messages need to be broadcasted.
Innovation Solution
The method involves transmitting information indicating changes in system information through downlink control information before a second modification period boundary, using indicators such as a short message field in paging DCI to signal changes to master information blocks, system information blocks, or scheduling information, allowing user equipment (UEs) to efficiently read updated system information without waiting for the next modification period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If system information changes are transmitted only at modification period boundaries, then system information stability is maintained, but the time to acquire updated system information increases
Solution Approach 1:
The patent transmits system information change indications in advance at paging occasions before the actual modification period boundary. This preliminary notification allows UEs to prepare for and quickly acquire updated system information when needed, rather than waiting passively for the modification period to occur, thereby reducing the time loss without compromising system stability.
2Productivity
If system information is updated frequently, then network responsiveness improves, but device complexity increases
Solution Approach 1:
The patent extracts only the essential change indication information and transmits it via paging DCI messages, separating the change notification function from the full system information transmission. This allows frequent updates to be signaled with minimal overhead, improving network responsiveness while avoiding the complexity of transmitting complete system information repeatedly.
Solution Approach 2:
The patent uses paging messages as a copy mechanism to notify UEs of system information changes without requiring full system information transmission in each paging message. The actual system information is acquired by UEs from dedicated sources, while the paging message serves as a lightweight copy/indicator, reducing device complexity.
3Loss of information
If system information changes are signaled immediately, then information freshness is improved, but loss of information increases
Solution Approach 1:
The patent introduces paging messages as an intermediary that carries change indication information between the network and UEs. This intermediary mechanism allows the network to signal changes immediately without transmitting complete system information through the same channel, thus delivering timely notifications while preserving information completeness through separate acquisition channels.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for transmitting information that indicates a change in system information. One method includes determining a change corresponding to system information occurring after a first modification period boundary. The method includes transmitting information in downlink control information that indicates the change corresponding to the system information. The information is transmitted before a second modification period boundary, and the change comprises a modification to a master information block, a modification to a system information block, a modification to scheduling information, or some combination thereof.