Single-RF Dual-SIM Operation for Simultaneous Rx/Tx
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Solution Overview
Problem
Dual-SIM mobile devices with a single RF device cannot simultaneously perform reception and transmission operations with two separate subscriber numbers due to network configuration limitations, leading to interruptions in data services when a call is received.
Innovation Solution
The UE reports a reduced aggregated bandwidth or number of Component Carriers (CCs) or Multiple-Input-Multiple-Output (MIMO) layers for one subscriber number to the network when a trigger condition is met, allowing simultaneous reception and transmission with both subscriber numbers by adjusting network configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single RF device is shared by two subscriber numbers, then device complexity and manufacturing cost are reduced, but simultaneous reception and transmission operations cannot be performed for both subscriber numbers
Solution Approach 1:
The patent implements dynamic switching of RF device allocation between two subscriber numbers based on operational mode. The system transitions between single-RF shared mode (for cost efficiency) and dual-RF mode (for simultaneous reception and transmission), allowing the hardware configuration to adapt dynamically to different operational requirements through mode switching mechanisms
Solution Approach 2:
The single RF device is designed to perform multiple functions by switching between different operational modes. The same physical RF device can serve both subscriber numbers sequentially and can be configured to support either reception or transmission primarily, with the capability to switch roles based on which subscriber number needs to operate, thereby achieving multi-functionality without requiring separate dedicated hardware for each function
2Reliability
If network configuration is optimized for one subscriber number, then communication performance for that subscriber number is improved, but the other subscriber number cannot access sufficient RF resources
Solution Approach 1:
The network configuration parameters such as aggregated bandwidth, number of Component Carriers, and MIMO layers are dynamically adjusted based on the operational mode and which subscriber number requires service. The system can switch between configurations optimized for single-subscriber high performance and configurations that allocate resources to support dual-subscriber simultaneous operations, ensuring appropriate resource allocation flexibility
3Reliability
If a call request for one SIM is received during ongoing data service for another SIM, then call functionality is ensured, but the ongoing data service must be interrupted
Solution Approach 1:
The system dynamically switches operational modes to support simultaneous voice and data services for different subscriber numbers. When a call request arrives for one SIM during data service on another SIM, the system transitions to a mode where the first RF device handles the voice call while the second RF device maintains the data service, ensuring both services continue without interruption through dynamic mode switching
Solution Approach 2:
The controller acts as an intermediary that manages RF device allocation and mode switching between the two subscriber numbers. It coordinates the switching between single-RF and dual-RF modes, ensuring that when one subscriber number needs voice service and another needs data service, the appropriate RF device is allocated to each function without service interruption
Data Source
AI summary
A method for simultaneous Reception (Rx) or Transmission (Tx) associated with dual subscriber numbers using a single RF device in a User Equipment (UE) is provided. The UE determines whether a trigger condition for enabling simultaneous Rx or Tx operation associated with two separate subscriber numbers is met. In response to the trigger condition being met, the UE reports a first value representing an aggregated bandwidth or a number of CCs or MIMO layers for one of the two separate subscriber numbers to a mobile communication network via the single RF device, so as to enable simultaneous Rx or Tx operation associated with the two separate subscriber numbers. In particular, the first value is less than a second value representing a maximum aggregated bandwidth or a maximum number of CCs or MIMO layers supported by the UE's capability.