Multi-Subscription UE Tune-Away Configuration for Lower Latency
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Solution Overview
Problem
Multi-subscription user equipment (UE) devices face challenges in managing concurrent network connections, leading to increased latency, missed messages, and inefficient resource utilization due to the inability to handle multiple subscriptions simultaneously.
Innovation Solution
A tune away configuration is implemented, allowing UE devices with multiple subscriptions to coordinate network connections by tuning away from one subscription to monitor or perform procedures associated with another, using parameters like time periods and paging occasions, and coordinating with base stations to conserve resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE device manages concurrent network connections for multiple subscriptions simultaneously, then communication coverage and service availability are improved, but latency increases and messages may be missed due to resource conflicts
Solution Approach 1:
The patent segments the network connection management by introducing a primary subscription and secondary subscription distinction. The UE divides its operation into different modes: connected mode for the primary subscription and idle mode for secondary subscriptions. This segmentation allows the device to handle multiple subscriptions without simultaneous active connections, thereby reducing latency while maintaining multi-subscription capability.
Solution Approach 2:
The patent implements preliminary action by establishing the primary subscription connection first and using it to receive and process tune away indications before switching to secondary subscriptions. The UE proactively monitors paging messages on the primary subscription to anticipate needed transitions to secondary subscriptions, allowing smoother handovers and reduced latency when switching between subscriptions.
2Productivity
If a UE device switches between different network connections for multiple subscriptions, then resource utilization is improved, but messages may be missed during transition periods
Solution Approach 1:
The patent implements feedback mechanisms where the network sends tune away indications via paging messages on the primary subscription, informing the UE when to switch to secondary subscriptions. The UE acknowledges and executes these indications, creating a closed-loop feedback system that ensures reliable message delivery during transitions. The network can monitor and adjust switching behavior based on UE responses, improving both resource utilization and message reliability.
Solution Approach 2:
The primary subscription acts as an intermediary between the network and secondary subscriptions. The UE uses the primary subscription's connected mode to receive coordination instructions (tune away indications) that mediate transitions to secondary subscriptions. This intermediary role ensures that switching between subscriptions is coordinated and controlled, preventing message loss while optimizing resource utilization across multiple subscriptions.
3Adaptability or versatility
If a UE device maintains active connections for multiple subscriptions, then service availability is improved, but network and device resources are wasted due to simultaneous connection management overhead
Solution Approach 1:
The patent implements periodic action by having the UE alternate between connected mode for the primary subscription and idle mode for secondary subscriptions based on tune away indications. Instead of maintaining continuous active connections for all subscriptions, the UE periodically switches between them, keeping only one subscription in connected mode at a time. This periodic switching reduces energy consumption and network resource usage while maintaining service availability across multiple subscriptions.
Solution Approach 2:
The patent applies discarding and recovering by temporarily discarding active connections for secondary subscriptions when the primary subscription is in use, and recovering them when needed through tune away transitions. The UE can discard the primary subscription's connected mode temporarily to access secondary subscriptions, then recover it when the tune away period ends. This approach reduces simultaneous connection management overhead while ensuring service availability when needed.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may transmit, in association with a first subscription of the UE, a tune away configuration that indicates one or more tune away parameters associated with a second subscription of the UE; tune away from a network connection associated with the first subscription according to the tune away configuration; and perform a communication procedure associated with the second subscription based at least in part on tuning away from the network connection associated with the first subscription. Numerous other aspects are provided.