MSIM Assistance Information for Wireless Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, Multiple Subscriber Identity Module (MSIM) capable User Equipment (UE) experiences throughput degradation and self-interference due to missed communications on one subscription while monitoring for activity on another, leading to inefficient resource usage and potential network misinterpretation of UE coverage.
Innovation Solution
The UE transmits MSIM assistance information to the network, enabling it to determine periodic gaps for monitoring and obtain scheduling information from the secondary subscription, thereby improving scheduling efficiency and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the UE monitors for activity on a second subscription while operating in connected mode on a first subscription, then the UE can maintain communication capabilities on multiple subscriptions, but the UE experiences throughput degradation and missed communications on the first subscription due to tuning away for activity on the second subscription
Solution Approach 1:
The UE performs measurements and identifies scheduling information for the second subscription in advance, before needing to tune away. By having this information prepared beforehand, the UE can quickly switch to monitoring the second subscription and return to the first subscription with minimal disruption to throughput.
Solution Approach 2:
The UE dynamically adjusts its monitoring behavior by utilizing periodic gaps in the scheduled communications of the first subscription to check for activity on the second subscription. This dynamic approach allows the UE to adapt to varying communication needs on both subscriptions without permanently degrading performance on either.
2Reliability
If the UE tunes away from the first subscription to monitor the second subscription, then the UE can detect communication opportunities on the second subscription, but the network may misinterpret the UE's absence as poor coverage or loss of connection
Solution Approach 1:
The UE provides feedback to the network by transmitting uplink signals during scheduled time slots and using periodic gaps to indicate its presence. This feedback mechanism allows the network to understand that the UE is intentionally tuning away to monitor the second subscription rather than experiencing connection loss or poor coverage.
Solution Approach 2:
The UE prepares measurement information and scheduling details for the second subscription in advance, allowing it to quickly return to the first subscription and resume normal communication patterns, thereby maintaining network synchronization and preventing misinterpretation of its status.
3Adaptability or versatility
If the UE operates in idle mode on the second subscription while connected on the first subscription, then the UE can monitor for paging and communication opportunities, but self-interference occurs between the two subscriptions
Solution Approach 1:
The UE segments its operation by utilizing periodic gaps in the connected mode subscription to perform idle mode monitoring on the second subscription. This temporal segmentation separates the two operations, reducing self-interference by ensuring they occur at different times rather than simultaneously.
Solution Approach 2:
The UE employs periodic gaps in its scheduled communications on the first subscription to periodically monitor the second subscription. This periodic action allows the UE to maintain both subscriptions with controlled interference, as the intermittent nature of the monitoring reduces continuous self-interference between the two modes.
Data Source
AI summary
A MSIM capable UE may operate in a connected mode on a first subscription with a first network and operates on a second subscription in an idle mode or an active mode. The UE may miss communication on the first subscription by tuning away for activity on the second subscription. As presented herein, the may UE transmit, to the first network, MSIM assistance information regarding the second subscription. The MSIM assistance information may enable the network to determine periodic gaps needed by the UE to monitor a second subscription in an idle mode. The MSIM assistance information may enable the network to identify a network for the second subscription and to obtain scheduling information directly from that network.