Multi-SIM Paging Coordination for Lower Idle Power
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Solution Overview
Problem
Multi-SIM wireless communication devices experience significant power consumption when operating in idle mode due to the need to monitor paging signals from multiple networks, which is inefficient and drains battery life.
Innovation Solution
The solution involves coordinating paging occasions in the time domain by determining a timing offset between paging occasions of different networks and requesting network alignment, allowing the device to monitor for paging signals more efficiently and reduce the frequency of transitioning between inactive and active states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the multi-SIM UE monitors paging signals from multiple networks at separate paging occasions, then the device can receive paging messages from all networks, but the power consumption increases significantly
Solution Approach 1:
The patent combines multiple separate paging occasions into a single coordinated paging occasion where the UE can monitor paging signals from multiple networks simultaneously. By aligning the paging occasions of different networks in time, the UE transitions to and from active state only once, thereby reducing power consumption while maintaining the ability to receive paging messages from all networks.
2Use of energy by moving object
If the multi-SIM UE operates in idle mode to reduce power consumption, then energy usage decreases, but the device must frequently transition to active state to monitor paging signals
Solution Approach 1:
The patent applies preliminary action by having the UE request and obtain coordinated paging occasion timing in advance from the networks. This pre-coordination ensures that paging occasions are aligned before the UE enters idle mode, allowing the device to minimize state transitions while monitoring paging signals from multiple networks efficiently.
3Reliability
If the multi-SIM UE monitors paging signals from multiple networks independently, then all paging messages can be received, but the monitoring time periods increase
Solution Approach 1:
The patent merges the monitoring of paging signals from multiple networks into a single coordinated time period. By aligning paging occasions of different networks, the UE monitors all paging signals simultaneously during one monitoring window instead of separately during multiple extended periods, thereby reducing the total duration while maintaining comprehensive monitoring coverage.
Data Source
AI summary
A method of operating a wireless communication device comprising a wireless interface having a capability to use a first identity and a second identity, the method comprising: determining a timing offset between a first timing of first paging occasions of a first network associated with the first identity and a second timing of second paging occasions of a second network associated with the second identity; and based on the timing offset, transmitting at least one request control message to at least one of the first network or the second network, to request a timing coordination of paging from the first network and paging from the second network.