MSIM UE Paging Collision Avoidance via Alternative Occasions
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Solution Overview
Problem
In wireless communication systems, there is a collision between the time domain durations for receiving downlink data and paging occasions for receiving paging messages in multi-subscriber identity module user equipment, leading to loss of paging messages and degraded user experiences.
Innovation Solution
The user equipment detects collisions between time domain durations for dedicated data subscriptions and paging occasions for non-dedicated data subscriptions and switches to alternative paging occasions to avoid collisions, using signal strength indicators to select the best beam for receiving paging messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors paging occasions for non-DDS subscriptions at configured time slots, then paging messages can be received for n-DDS subscriptions, but collisions occur with downlink data reception for DDS subscriptions causing message loss
Solution Approach 1:
The UE performs preliminary detection of collision between paging occasions and downlink data durations before monitoring paging messages. By detecting the time domain collision in advance, the UE can proactively switch to alternative paging occasions, preventing paging message loss before it occurs.
Solution Approach 2:
The UE dynamically adjusts paging occasion monitoring by switching between different paging occasions based on detected collisions. Instead of statically monitoring fixed paging occasions, the UE adapts its monitoring behavior by selecting alternative paging occasions when collisions with downlink data are detected, making the system flexible and responsive to real-time conditions.
2Device complexity
If the UE uses a single receiver to handle both DDS and n-DDS subscriptions, then device complexity is reduced, but collision between downlink data and paging occasions cannot be avoided
Solution Approach 1:
The UE segments the reception of downlink data and paging messages into separate time domain intervals. By detecting collisions and switching to alternative paging occasions, the UE creates non-overlapping time slots for data reception and paging message reception, allowing a single receiver to handle both functions reliably without simultaneous operation requirements.
3Reliability
If the UE switches to alternative paging occasions to avoid collisions, then paging message reception is ensured, but time delay increases due to remonitoring
Solution Approach 1:
The UE performs preliminary detection of collision between paging occasions and downlink data durations before the actual paging message transmission. By identifying potential collisions in advance and proactively switching to alternative paging occasions, the UE avoids paging message loss without significant time delay, as the switch is made before the paging occasion occurs rather than after missing a message.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) detects a collision between a duration in time domain configured to receive downlink data for a dedicated data subscription (DDS) subscription of the MSIM UE and a first paging occasion configured to receive a paging message for a non-DDS (n-DDS) subscription of the MSIM UE. The UE may then monitor a second paging occasion different from the first paging occasion for the paging message, the second paging occasion configured to avoid collision with the duration in time domain.