MSIM Hotspot RAT Switching for Low-Latency Link Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly those utilizing Multi-Subscriber-Identification-Module (MSIM) devices as personal hotspots, face limitations in efficiently switching between different subscriptions, especially when operating as a personal hotspot device, leading to suboptimal performance and latency issues.
Innovation Solution
Implement methods and procedures for improved radio access technology (RAT) management in MSIM low latency hotspot devices, including determining link quality and evaluating cellular links to switch between Wi-Fi and cellular connections based on performance requirements, utilizing a location database for parameters, and supporting dedicated bearers to optimize link selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MSIM devices are used as personal hotspots with multiple cellular subscriptions, then connectivity options and adaptability are improved, but switching between subscriptions becomes extremely limited and latency increases
Solution Approach 1:
The patent implements dynamic switching between different cellular subscriptions and radio access technologies (Wi-Fi, cellular) based on real-time link quality evaluation. The system continuously monitors link characteristics and automatically transitions between available connections to optimize performance, enabling adaptive connectivity management in MSIM hotspot devices.
Solution Approach 2:
The patent employs link quality evaluation mechanisms that continuously assess the performance of available cellular links and Wi-Fi connections. Based on this feedback, the system makes informed decisions about which connection to use for application sessions, improving switching efficiency and reducing latency by selecting optimal connections in real-time.
2Productivity
If dynamic switching between Wi-Fi and cellular links is implemented, then link selection efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service RAT selection where the device automatically evaluates link qualities and makes switching decisions without requiring complex manual configuration or external network control. The system autonomously manages connection selection based on predefined evaluation criteria, simplifying the management overhead while maintaining high link selection efficiency.
3Adaptability or versatility
If multiple cellular links are evaluated for switching, then adaptability to different networks is improved, but measurement and evaluation complexity increases
Solution Approach 1:
The patent utilizes link quality parameters such as reference signal received power (RSRP), signal-to-interference-plus-noise ratio (SINR), and other standard wireless measurement metrics to evaluate and compare different cellular links. By transforming complex network conditions into measurable parameters, the system achieves network adaptability while keeping evaluation manageable through standardized metrics.
Data Source
AI summary
A device executing a low-latency application that uses a Wi-Fi link may switch from the Wi-Fi link to using a second link to a multi-subscriber (MSIM) PHS device. The device may access, via the second link, any one of multiple cellular links, each cellular link corresponding to a different respective cellular subscription of multiple subscriptions used by the PHS device. The application executing on the device may thus use a preferred cellular link from among the multiple cellular links. The preferred cellular link may be determined based on parameters corresponding to the plurality of cellular links for each respective cellular subscription. The parameters may be obtained from a location database. The preferred cellular link (which may presently correspond to a primary subscription) on the PHS device may be switched to be a different cellular link (which may correspond to a non-primary subscription) during execution of the application on the device.