Multi-SIM UE Tune-Away Signaling for Paging Coordination
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Solution Overview
Problem
Existing wireless communication systems for multi-SIM devices face challenges in delivering paging to a first SIM while the device is actively communicating with another SIM, leading to inefficiencies and potential loss of important notifications.
Innovation Solution
Implementing apparatuses and methods that prioritize and manage paging delivery to a first SIM of a multi-SIM user equipment (UE) by using priority-based ranking and scheduling mechanisms, ensuring efficient communication with both SIMs without interrupting active sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device monitors paging for multiple SIMs simultaneously, then paging delivery capability is improved, but power consumption increases
Solution Approach 1:
The patent segments the paging monitoring task by SIM, allowing the device to monitor paging for each SIM separately based on its state. When a SIM is in connected state, paging monitoring is suspended; when in idle state, paging monitoring is activated. This segmentation enables selective energy consumption based on actual need.
Solution Approach 2:
The patent implements dynamic paging monitoring where the monitoring behavior changes based on the operational state of each SIM. The system transitions between monitoring and non-monitoring states dynamically, adjusting power consumption according to the current communication state rather than maintaining constant monitoring.
2Reliability
If the device switches between SIMs to receive paging, then paging delivery is improved, but active communication sessions are interrupted
Solution Approach 1:
The patent segments the radio resource access by SIM, allowing independent paging reception for each SIM without requiring switches that would interrupt active sessions. Each SIM can be monitored independently through the shared antenna system without affecting ongoing communications.
Solution Approach 2:
The patent introduces a mediator mechanism where the base station assists in delivering paging messages to specific SIMs without requiring the UE to switch active sessions. The network coordinates paging delivery to minimize interruptions to ongoing communications.
3Device complexity
If the device uses a shared antenna for multiple SIMs, then device complexity is reduced, but paging collision occurs
Solution Approach 1:
The patent applies preliminary action by having the UE indicate its paging reception needs to the base station before paging collisions occur. The base station then schedules paging transmissions at times when the UE is most available, preventing collisions proactively rather than reacting to them.
Solution Approach 2:
The patent implements feedback mechanisms where the UE provides information about its state and paging needs to the base station. This feedback loop enables the network to adjust paging scheduling dynamically, avoiding collisions and ensuring reliable delivery despite the shared antenna configuration.
Data Source
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AI summary
Apparatuses, systems, and methods for a user equipment device (UE) to perform methods for enhancement of multi-SIM devices, such as UE 106. A network may increase paging retries for known MU-SIM devices, e.g., based on an indication of capabilities from a MU-SIM device. The indication may be via a NAS registration request, an RRC capability procedure, and/or an RRC UE assistance procedure. Additionally, a network may include an indication of a paging priority to the UE. The UE may then determine a response to the page based, at least in part, on the indicated priority. Further, the UE may indicate a tune-away to the network. The indication of the tune-away may include a cause and/or duration for the tune-away and may be provided at an RRC level or a network access stratum (NAS) level.