Paging Message System Information Update Indication
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Solution Overview
Problem
In LTE networks, wireless terminals face inefficiencies in updating system information configurations, leading to increased energy consumption and network access delays due to the lack of specific information in paging messages about the relevance and action required for updates, particularly when using the AIT/SSI two-step approach.
Innovation Solution
The method involves transmitting a paging message that indicates whether an updated system information configuration is relevant and how to react to the update, including an index associated with an entry in a table of system information configurations, a validity value, and a validity area, allowing wireless terminals to selectively update their configurations and reduce unnecessary network access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless terminals continuously monitor and update system information configurations, then system information relevance is ensured, but energy consumption increases
Solution Approach 1:
The patent extracts only the essential update indication information from system information changes and transmits it via paging messages. Instead of requiring terminals to continuously monitor all system information, the network extracts and sends only those changes that are relevant, reducing terminal processing overhead and energy consumption while maintaining information relevance.
Solution Approach 2:
The patent implements partial action by having terminals selectively update only specific system information configurations based on received indications, rather than performing full system information re-acquisition. The network sends partial update information (specific SIB changes) rather than complete system information sets, reducing both network load and terminal energy consumption.
2Reliability
If wireless terminals perform frequent system information updates, then information currency is maintained, but network access delays increase
Solution Approach 1:
The patent applies preliminary action by having the network pre-identify and indicate specific system information changes before terminals need to access the network. Terminals receive advance notification of which SIBs have changed, allowing them to perform targeted updates rather than waiting for full system information re-acquisition, thus reducing access delays while maintaining information currency.
Solution Approach 2:
The patent introduces paging messages as an intermediary mechanism between system information changes and terminal updates. Instead of terminals directly monitoring all system information broadcasts, the paging message serves as an intermediary that conveys essential update indications, enabling terminals to efficiently determine which updates are necessary without continuous full system information monitoring.
3Reliability
If comprehensive system information updates are transmitted, then update completeness is ensured, but network signaling overhead increases
Solution Approach 1:
The patent segments system information into individual SIBs and provides update indications for specific SIBs rather than transmitting complete system information sets. Each paging message can indicate changes to specific SIBs (e.g., SIB2, SIB3) allowing selective terminal updates, thereby reducing network signaling overhead while ensuring completeness of necessary updates through targeted delivery.
Solution Approach 2:
The patent extracts only the essential update indication data from complete system information changes. Instead of re-transmitting entire SIB contents, the network extracts and sends only the change indicators and essential update parameters, significantly reducing signaling overhead while maintaining update completeness for terminals that need to act on the changes.
Data Source
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AI summary
It is presented a method for indicating system information configuration updates to wireless terminals (1). The method is performed in a network node (2) of a wireless communication network (5) and comprises: determining (60) that a system information configuration has been updated; and5 transmitting (61) a paging message comprising information indicating to a wireless terminal receiving the paging message whether the updated system information configuration is relevant and/or how to react to the update. It is also presented a method in a wireless terminal, a network node, a wireless terminal, a computer program and a computer program product.10