Multi-SIM RF Path Allocation via Time Division Multiplexing
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Solution Overview
Problem
Conventional dual SIM dual active (DSDA) devices require additional hardware and software resources, increasing costs and power consumption, while dual SIM dual standby (DSDS) devices suffer from reduced communication performance due to shared RF resources.
Innovation Solution
Implementing a method and device that uses fewer RF transmission paths than conventional DSDA schemes, employing time division multiplexing to allocate RF paths between SIMs, allowing for improved communication performance compared to DSDS devices while reducing costs and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dual SIM dual active (DSDA) scheme is used with multiple RF transmission paths, then communication performance is improved, but hardware cost and power consumption increase
Solution Approach 1:
The patent implements dynamic RF transmission path allocation where the system can switch between DSDA mode (with multiple RF paths) and DSDS mode (with shared RF path) based on real-time communication requirements. This dynamic adjustment allows the device to optimize between communication performance and power consumption by using full RF resources only when necessary
Solution Approach 2:
The system employs periodic time division multiplexing for RF resource sharing between SIM cards, where RF transmission paths are allocated in time slots rather than continuously. This periodic allocation enables both SIMs to access RF resources efficiently, reducing hardware requirements while maintaining acceptable communication performance for both subscriptions
2Reliability
If dual SIM dual active (DSDA) scheme is used with multiple RF transmission paths, then communication performance is improved, but power consumption increases
Solution Approach 1:
The system dynamically adjusts RF resource allocation based on communication activity. When only one SIM is actively communicating, the system switches to a lower-power mode using a single RF path. When both SIMs require simultaneous communication, the system activates multiple RF paths temporarily, thereby reducing overall power consumption while maintaining communication performance when needed
Solution Approach 2:
The patent changes the operational parameters of RF transmission paths by controlling their activation state. RF paths can be switched between active and inactive states based on communication requirements, allowing the system to reduce power consumption by deactivating unused RF paths while maintaining the capability to activate them when communication performance requires full functionality
3Device complexity
If dual SIM dual standby (DSDS) scheme is used with shared RF resources, then hardware cost is reduced, but communication performance decreases
Solution Approach 1:
The system enhances the conventional DSDS approach by introducing dynamic RF resource sharing with time division multiplexing. While hardware resources remain reduced, the system can dynamically allocate RF paths to different SIMs based on communication priority and activity, thereby improving communication performance compared to static RF sharing without requiring additional hardware
Data Source
AI summary
An operating method of a user equipment supporting dual subscriber identity module (SIM) dual active (DSDA), the method including performing a first communication with a first base station through a first network via radio frequency (RF) transmission paths allocated to a first SIM, the transmission paths being included in a set of RF transmission paths of the user equipment, determining whether the set of RF transmission paths includes more than the RF transmission paths in response to a resource allocation request from a second SIM, the resource allocation request corresponding to a second communication with a second base station through a second network, and allocating at least one of the RF transmission paths to each of the first SIM and the second SIM based on a time division multiplexing (TDM) scheme in response to determining the set of RF transmission paths does not include more than the RF transmission paths.