Extended Paging Cycle System Information Update Mechanism
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Solution Overview
Problem
User equipment (UE) in sleep or idle mode with extended paging cycles may miss system information updates, leading to invalid SI and difficulties in reconnecting to the network, as current mechanisms do not ensure timely and reliable reception of SI changes, especially with paging cycles longer than the modification period.
Innovation Solution
Incorporating an optional field in the paging message, 'systemInfoModificationExtendedPagingCycle' (SIMExtPC), to indicate whether SI has changed, and allowing UEs to wake up earlier to read the MIB and SIB1 to verify SI updates, ensuring valid SI before initiating RRC connection establishment or reestablishment, even during extended paging cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the paging cycle is extended to reduce power consumption, then energy efficiency improves, but the reliability of receiving system information updates deteriorates
Solution Approach 1:
The patent applies preliminary action by having the eNodeB send a first paging message before the system information modification period ends, warning UEs about upcoming SI changes. This allows UEs to prepare and wake up at the correct time to receive updated system information, even when operating on extended paging cycles that would otherwise cause them to miss the modification period notifications.
2Use of energy by moving object
If the paging cycle is extended to reduce power consumption, then energy efficiency improves, but the timeliness of system information delivery deteriorates
Solution Approach 1:
The patent applies preliminary action by having the eNodeB send a first paging message before the system information modification period ends, warning UEs about upcoming SI changes. This allows UEs to prepare and wake up at the correct time to receive updated system information, even when operating on extended paging cycles that would otherwise cause them to miss the modification period notifications.
Solution Approach 2:
The patent introduces an intermediary mechanism - a first paging message that acts as a warning or alert between the system information modification process and the actual SI update delivery. This intermediary message bridges the gap caused by extended paging cycles, ensuring UEs are notified in advance and can timely receive the actual system information updates without losing synchronization.
3Loss of energy
If UEs wake up less frequently to conserve power, then energy consumption decreases, but the accuracy of detecting system information changes deteriorates
Solution Approach 1:
The patent applies feedback by implementing a two-stage paging mechanism where the first paging message provides advance warning of system information changes, and the second paging message (or system information broadcast) delivers the actual updates. This feedback loop ensures UEs with extended paging cycles are properly notified of SI changes and can wake up at the appropriate times to receive updates, maintaining accurate detection of system information changes while conserving power.
Data Source
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AI summary
Embodiments of an enhanced Node B (eNB) and method to provide system information (SI) updates to user equipment (UE) in sleep or idle mode with an extending paging cycle are generally described herein. In some embodiments, a paging message configured to include an optional field to indicate whether there has been a system information (SI) update since a last paging occasion for a UE in sleep or idle mode with an extending paging cycle. System information updates are transmitted by the eNB during a system information modification period that is shorter than a period the extending paging cycle. The optional field may indicate whether or not the UE is to acquire the latest SI update during the current paging occasion.