DSDA User Equipment Collision Mitigation Through Priority Time Windows

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Solution Overview

Problem

Dual SIM dual active (DSDA) user equipment (UE) experiences communication degradation due to limitations that prevent concurrent activity on both subscriptions, leading to dropped communications and increased latency in transmit sharing mode.

Innovation Solution

The UE generates and transmits communications in specific time windows with prioritized traffic using a time domain division pattern, and modifies periodic intervals to mitigate collisions, ensuring prioritized transmission of critical communications.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the UE transmits communications for both subscriptions concurrently in DSDA mode, then the productivity and communication capability are improved, but communication collisions and latency increase due to shared transmit resources

Engineering Contradiction:

Improvecommunication capabilityVSAvoidlatency

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The transmit time is segmented into priority-based time windows (first time window for high priority traffic, second time window for low priority traffic). The UE determines which time window to use based on the priority of the communication, thereby avoiding collisions while maintaining structured transmission for both subscriptions

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The UE dynamically adjusts the transmission timing by selecting different time windows based on communication priority. High priority communications are transmitted in the first time window while low priority communications are transmitted in the second time window, allowing adaptive resource allocation that reduces latency for critical traffic

Inventive Principle:

Principle #15Dynamics

2Loss of time

If the UE prioritizes transmission in the first time window for high priority traffic, then the latency for critical communications is reduced, but the second time window for low priority traffic may experience increased loss

Engineering Contradiction:

Improvelatency for critical communicationsVSAvoidcommunication delivery

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

The UE determines whether to transmit a communication in the first or second time window based on the priority of the communication. This feedback mechanism ensures that high priority communications receive immediate transmission opportunities while low priority communications are scheduled in the second time window, balancing latency reduction with reliable delivery

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12376152B2Collision mitigation for a dual subscriber identity module (SIM) dual active (DSDA) user equipment

Publication Date: 2025.07.29 QUALCOMM INC

AI summary

This disclosure provides systems, methods and apparatuses for enabling collision mitigation for a user equipment (UE) operating in a dual active mode. In some aspects, the UE may generate a communication for a first subscription in a first time window associated with a first priority for a time domain division pattern with a second subscription. The UE may transmit, using the first subscription, the communication in a second time window associated with a second priority for the time domain division pattern. For example, the second time window associated with the second priority may be a time window in which traffic for the first subscription is prioritized. In some aspects, the UE may select modified periodic intervals for transmissions of a communication to mitigate collisions associated with the time domain division pattern. For example, a transmission time of the periodic communication may be varied (or randomized) over time.