Multi-USIM Network Switching With Timed Leave Acceptance
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Solution Overview
Problem
Mobile devices supporting multiple simultaneous cellular network subscriptions face challenges in optimizing resource sharing and efficiently switching between active network connections, particularly when idle or inactive connections are present, leading to inefficient use of hardware resources and increased signaling.
Innovation Solution
Implementing a default time period (MUSIMLeaveTime) for terminal devices to consider a request for leaving an active network connection as accepted if no response is received within that period, with the option to override this period based on network conditions, allowing seamless switching to another network without additional signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal device supports multiple simultaneous network subscriptions, then the device can maintain connectivity to multiple networks, but the hardware resources become inefficiently utilized and switching between connections becomes complex
Solution Approach 1:
The patent segments the network connection management by introducing a default time period (MUSIMLeaveTime) that divides the switching process into distinct phases: a waiting period for network response and an override period for immediate switching. This temporal segmentation simplifies resource management by providing clear boundaries for when resources should be held and when they can be reallocated.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the default time period (MUSIMLeaveTime) and override condition parameters before switching is needed. The network can pre-configure these parameters in the terminal device, so when switching is required, the device already has the rules in place to determine whether to wait for network response or immediately override and switch connections, eliminating the need for complex real-time decisions.
2Reliability
If the terminal device waits for network response before switching connections, then network coordination is improved, but switching delay increases
Solution Approach 1:
The patent introduces dynamics by making the waiting time flexible rather than fixed. The system uses a default time period (MUSIMLeaveTime) that can be dynamically adjusted through override conditions. If the network responds within the default period, coordination is maintained; if not, the override condition allows immediate switching, eliminating unnecessary delays. This dynamic approach adapts to actual network conditions rather than adhering to a rigid timeline.
Solution Approach 2:
The default time period (MUSIMLeaveTime) acts as an intermediary between network coordination requirements and switching speed requirements. It provides a buffer period that allows the network to respond while preventing indefinite waiting. The override condition serves as another intermediary that mediates between maintaining the connection and switching away, allowing the system to balance coordination and speed based on actual needs.
3Speed
If the terminal device immediately switches network connections without waiting, then switching speed improves, but network coordination deteriorates
Solution Approach 1:
The patent implements feedback by having the terminal device send a switching request to the network and wait for a response within the default time period (MUSIMLeaveTime). The network's response (or lack thereof) provides feedback that determines whether to proceed with switching. If the network responds negatively or within the time period, the device coordinates with the network before switching, maintaining reliability while still enabling relatively fast switching compared to traditional methods.
4Measurement precision
If additional signaling is used for network coordination during switching, then coordination accuracy improves, but signaling overhead increases
Solution Approach 1:
The patent applies partial action by using a default time period (MUSIMLeaveTime) that is sufficient for most coordination scenarios but not excessive. The override condition provides an additional mechanism that activates only when needed, avoiding unnecessary signaling in cases where the default period suffices. This partial approach uses minimal signaling (just the switching request and optional response) while maintaining coordination accuracy when required, rather than using extensive signaling in all cases.
Data Source
AI summary
A method comprising transmitting a configuration of a default time period, wherein the default time period is for allowing a terminal device to consider a request for leaving an active network connection to a first network as accepted by the first network if the first network does not send a response within that the default period, to the terminal device, receiving a first message, from the terminal device, indicating a request to leave the active network connection, determining an overriding condition that overrides the default time period for leaving the active network condition and transmitting, to the terminal device, a second message comprising the overriding condition.