Dual-SIM Paging Collision Remediation via Priority Arbitration
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Solution Overview
Problem
In dual-SIM dual-standby devices with a single receive-transmit chain, contention for shared signal processing resources leads to performance degradation of secondary subscriptions, as they often lose access to RF resources, resulting in poor user experience and call performance.
Innovation Solution
Implementing a remedial action policy and using historical information to arbitrate access to signal processing resources, with hysteresis to preserve paging performance of primary subscriptions, and retransmission remedial actions to improve page blocking rates by increasing the priority of blocked subscriptions during retransmission intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single receive-transmit chain is used in dual-SIM dual-standby devices, then device complexity and bill of materials are reduced, but subscription performance becomes unequal due to resource contention
Solution Approach 1:
The patent implements dynamic resource allocation where the system continuously monitors subscription performance metrics and adjusts resource granting decisions in real-time. The controller dynamically switches between subscriptions based on current performance needs, transforming the static single-Rx-Tx chain into a dynamically shared resource that adapts to changing conditions.
Solution Approach 2:
The system changes operational parameters by adjusting the priority and resource allocation weights for different subscriptions based on historical performance data. When one subscription shows degradation, the system modifies parameters such as resource granting probability and performance threshold values to rebalance the allocation and improve overall fairness.
2Reliability
If historical information and remedial action policy are implemented, then subscription performance fairness is improved, but control complexity increases
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously monitors resource access outcomes and performance metrics for each subscription. This feedback loop enables the system to detect performance degradation and automatically trigger remedial actions, creating a self-regulating control system that maintains fairness without requiring complex external management.
Solution Approach 2:
The system performs self-diagnosis and self-correction by automatically detecting when a subscription is underperforming and initiating remedial actions without external intervention. The controller monitors its own resource allocation decisions and adjusts future granting behavior based on observed outcomes, making the system self-managing rather than requiring complex external control.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves the performance of dual-subscription devices by ensuring more equitable access to shared resources, reducing page blocking, and maintaining acceptable paging performance for higher priority subscriptions.
Implementation Method 1
When access to the signal processing resource is granted to the second subscription during the second time period, hysteresis may be used to determine whether to grant access to the signal processing resource to the first subscription during a third time period that is after the second time period
Data Source
AI summary
The various embodiments include methods for managing how a MSMS communication device that is accessing an arbitrary combination of multiple telephony networks processes paging collisions. The embodiment methods promote improving a subscription's page blocking rate by causing a MSMS communication device to implement a retransmission remedial action for a blocked subscription. In the various embodiments, the MSMS communication device may implement the retransmission remedial action by increasing a blocked subscription's priority during a subsequent retransmission interval to increase the likelihood that the blocked subscription will receive a repeated page message from its mobile network during this retransmission interval. In some embodiments, the blocked subscription's current priority may be based on the number of retransmission intervals that are presently occurring.