Multi-Subscription Connection Break Notification
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Solution Overview
Problem
Dual SIM devices with a single radio front end and baseband chain introduce gaps in active connections when switching between networks, leading to communication disruptions, network misinterpretation, and inefficiencies, affecting both the device and other mobile terminals connected to the same cell.
Innovation Solution
A method and apparatus that inform the network of impending or actual connection breaks initiated by a device with multiple subscriptions, allowing for controlled management of these breaks to minimize disruptions and optimize network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a DSDS device interrupts an active connection to read paging information from another network, then multi-subscription operation is enabled, but gaps are introduced into the active connection causing communication disruptions
Solution Approach 1:
The network is informed in advance about the impending connection break before it occurs. This allows the network to prepare and account for the interruption, reducing the negative impact on the active connection while enabling the device to switch networks for multi-subscription operations.
Solution Approach 2:
The device provides feedback to the network about its multi-subscription activities and resulting connection breaks. This feedback mechanism enables the network to adapt its behavior and optimize resource allocation, balancing multi-subscription functionality with connection stability.
2Reliability
If a DSDS device interrupts an active connection to perform tracking area updates or cell search procedures, then network registration is maintained, but gaps prevent network adaptation from functioning properly
Solution Approach 1:
The network is notified beforehand about connection breaks needed for tracking area updates or cell search procedures. This preliminary notification allows the network to maintain proper registration state while minimizing disruption to adaptation processes by scheduling resources appropriately around the known interruptions.
3Adaptability or versatility
If gaps are introduced into reception from the first network, then the device can read paging information from another network, but missed paging may cause the network to page the mobile terminal within a larger area increasing paging load
Solution Approach 1:
By notifying the network in advance about the connection break and the intended network switching, the device enables the network to proactively manage paging operations. The network can page the terminal in the appropriate cell before the switch occurs, avoiding the need for wide-area paging and reducing overall paging load.
Solution Approach 2:
The device provides feedback about its subscription status and network switching intentions, allowing the network to optimize paging strategies. This feedback enables the network to concentrate paging efforts in specific cells rather than broadcasting across larger areas, reducing paging load.
4Reliability
If a DSDS device uses multiple standalone cellular radios, then connection breaks are reduced, but device complexity increases
Solution Approach 1:
The network acts as an intermediary that coordinates the device's network switching activities. By informing the network about intended connection breaks, the device enables the network to manage the complexity of multi-radio coordination, allowing the device to maintain simpler hardware while achieving improved connection continuity through network-assisted switching.
Data Source
AI summary
A method, apparatus and computer program product are provided in which the network is informed of a connection break with a device having multiple SIMs. In this regard, from the perspective of the device, information regarding a connection break with the device is provided to a network entity associated with a first network, the device communicating with the first network via a first subscription. The method may also cause the connection break to be initiated and causing another connection to be established with the device via a second subscription. From the perspective of the network, a method, apparatus and computer program product are provided in which the network receives information regarding the connection break and, based on the information, performs one or more network optimization actions.