Dual RF Device Controller for Dual Active Subscriber Identity Support
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dual-card cellular phones with a single RF device can only allow one subscriber identity to occupy the RF device for transmission/reception operations at a time, leading to missed calls when a call request is received for another subscriber number while an active call is ongoing on the first subscriber number.
Innovation Solution
Implementing EN-DC/NE-DC/NGEN-DC technology to enable dual connectivity with a 5G and 4G network for a single subscriber identity, allowing simultaneous single connectivity with a 5G network for one subscriber identity and single connectivity with a 4G network for another subscriber identity, enabling dual active support on dual-card cellular phones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single RF device is shared by two subscriber identities, then cost is reduced, but call reliability deteriorates because only one subscriber identity can occupy the RF device at a time
Solution Approach 1:
The patent divides the single RF device into two separate RF devices (first RF device and second RF device), allowing each subscriber identity to have dedicated RF resources. This segmentation resolves the conflict by enabling simultaneous operation of both subscriber identities without sharing conflicts, thereby maintaining call reliability while still controlling overall device complexity through integrated design.
2Reliability
If dual connectivity with 5G and 4G networks is implemented, then simultaneous calls on both subscriber identities are enabled, but device complexity increases
Solution Approach 1:
The patent implements dual connectivity functionality where the mobile communication device can simultaneously connect to both 5G and 4G networks. The controller manages multiple subscriber identities across different RATs (Radio Access Technologies), allowing the device to perform multiple functions (5G connectivity, 4G connectivity, dual active calls) within a single integrated platform, thereby achieving reliability enhancement without proportionally increasing overall device complexity.
Data Source
AI summary
A mobile communication device including a first RF device, a second RF device, and a controller is provided. The first RF device performs wireless transmission and reception utilizing a first RAT. The second RF device performs wireless transmission and reception utilizing a second RAT. The controller uses a first subscriber identity to make a first call or conduct a first data session via the first RF device, determines whether a dual connectivity on the first RAT and the second RAT is supported in response to a request for using a second subscriber identity to start a second call or a second data session via the second RF device, and allows the second call or the second data session to start during the first call or the first data session in response to the dual connectivity on the first RAT and the second RAT being supported.