Aligning Paging Occasions for Multi-USIM Power Reduction
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Solution Overview
Problem
Multi-USIM devices with dual receive capabilities face high power consumption due to the need to monitor separate paging occasions for each subscription, leading to increased wake-up times and resource usage.
Innovation Solution
The alignment of paging occasions across multiple USIMs is achieved through full, sequential, or partial alignment strategies, where the UE requests and the network reallocates paging occasions to minimize power consumption by sharing receiver resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate paging occasions are monitored for each USIM subscription, then reliable paging reception for multiple subscriptions is ensured, but power consumption increases and receiver resources are overused
Solution Approach 1:
The patent merges the paging monitoring operations of multiple USIMs by aligning their paging occasions to occur at the same time. This allows the device to monitor multiple subscriptions simultaneously using shared receiver resources, rather than sequentially activating receivers for each USIM, thereby reducing power consumption while maintaining reliable paging reception for all subscriptions
Solution Approach 2:
The patent makes the receiver chains universal by enabling them to serve multiple USIM subscriptions simultaneously through aligned paging occasions. The same receiver resources are used for monitoring paging of multiple identities at the same time, increasing resource utilization efficiency and reducing the need for dedicated receivers per subscription
2Reliability
If separate paging occasions are monitored for each USIM subscription, then complete paging coverage for all subscriptions is achieved, but device complexity and resource management become more complex
Solution Approach 1:
The patent combines the paging monitoring schedules of multiple USIMs into aligned paging occasions, simplifying the resource management architecture. Instead of managing separate monitoring schedules and receiver activations for each USIM, the system manages a unified set of aligned occasions, reducing the complexity of scheduling and resource allocation while ensuring complete paging coverage
3Ease of operation
If receiver chains are ramped up and down frequently for each USIM, then individual subscription monitoring is optimized, but power consumption increases due to frequent activation cycles
Solution Approach 1:
The patent maintains continuous receiver operation during aligned paging occasions by eliminating the need to ramp down and back up receivers between consecutive USIM monitoring. The receivers remain active continuously to monitor multiple aligned paging occasions, converting the discontinuous activation pattern into a continuous operation mode that reduces power consumption while maintaining monitoring efficiency for all subscriptions
Data Source
AI summary
There is provided reduced power consumption in devices that use at least two identities for communications. A method comprises aligning (1302) a plurality of paging occasions across at least two identities of a communication device. The aligning is performed via requesting and receiving (1306) from a communication network a paging occasion for the communication device with at least two identities using at least one of the identities.