Multi-SIM Wireless Device Collision Avoidance via RAT Reselection
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Solution Overview
Problem
Multi-SIM wireless communication devices experience persistent collisions between subscriptions due to overlapping cyclic activities of different Radio Access Technologies (RATs), leading to reception or transmission failures, low data throughput, and degraded user experience.
Innovation Solution
The wireless communication device reselects from one RAT to another with a different periodicity to avoid collisions, using a method that determines collision overlap and initiates a timer to manage RF resource allocation between subscriptions, ensuring continuous communication without persistent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the wireless communication device uses the same RAT for both subscriptions, then the device complexity is reduced, but persistent collisions occur between cyclic activities of the two subscriptions
Solution Approach 1:
The patent changes the periodicity parameter of the RAT by reselecting from a first RAT with a first periodicity to a second RAT with a second periodicity. This parameter change allows the cyclic activities of the two subscriptions to occur at different intervals, preventing persistent collisions while maintaining single RF resource usage.
2Measurement precision
If the wireless communication device monitors both subscriptions continuously, then the collision detection accuracy is improved, but the energy consumption increases
Solution Approach 1:
The patent implements periodic monitoring of cyclic activities instead of continuous monitoring. By checking for collisions at specific intervals corresponding to the periodic nature of RAT activities, the system achieves sufficient collision detection accuracy while significantly reducing energy consumption compared to continuous monitoring.
Solution Approach 2:
The system performs preliminary determination of whether cyclic activities will collide before actually attempting communication. This advance detection allows the device to proactively switch RATs or adjust timing, preventing collision-related energy waste and ensuring reliable communication without requiring exhaustive continuous monitoring.
3Reliability
If the wireless communication device switches RAT frequently to avoid collisions, then the collision avoidance effectiveness is improved, but the device complexity increases
Solution Approach 1:
The patent utilizes changes in RAT periodicity parameters to achieve collision avoidance. By selecting a second RAT with a different periodicity from the first RAT, the system can avoid persistent collisions through natural timing differences rather than frequent active switching, thereby reducing the complexity of collision avoidance mechanisms.
Data Source
AI summary
Examples described herein relate to managing communications for a first subscription and a second subscription of a wireless communication device, including, but not limited to, determining collision between activities of the first subscription over a first RAT and activities of the second subscription over a second RAT and reselecting from the second RAT to a third RAT for the second subscription.