Dual-SIM UE Narrow-Bandwidth Access for Lower Power Monitoring
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Solution Overview
Problem
User equipment (UE) with dual SIMs consumes excessive power due to wide-bandwidth cell monitoring when accessing multiple cellular networks for Internet data communication.
Innovation Solution
The UE determines a subscriber identity module for Internet data communication and configures a narrow bandwidth for the unused SIM stack, performing connection processes through the wireless communication circuit using appropriate identification information and transmitting UE capability information to support the narrow bandwidth for the second cellular network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a user terminal is equipped with multiple subscriber identity modules for different networks, then the ability to access multiple networks and services is improved, but the power consumption increases due to multiple receivers being activated simultaneously
Solution Approach 1:
The system pre-determines whether to activate the first or second receiver based on uplink scheduling information received from the network before actual data transmission occurs. This preliminary decision prevents unnecessary activation of the second receiver when only the first network has uplink resources allocated, thereby reducing power consumption while maintaining multi-network access capability.
Solution Approach 2:
The receiver activation state is dynamically adjusted based on real-time uplink scheduling conditions. The system transitions between different receiver activation states (first receiver only, second receiver only, or both receivers) according to the network's uplink resource allocation, optimizing power consumption adaptively rather than maintaining a fixed activation state.
2Adaptability or versatility
If uplink data is transmitted through a second receiver in a dual-receiver terminal, then network communication capability is improved, but receiving service in the first network may be suspended due to single-radio operation constraints
Solution Approach 1:
The system uses uplink scheduling information as an intermediary indicator to coordinate receiver activation. By checking the uplink scheduling information from the first network before activating the second receiver for uplink transmission, the system ensures that first network reception can be properly suspended and resumed, preventing service suspension while enabling second network uplink transmission.
Solution Approach 2:
The system continuously monitors uplink scheduling information from the network as feedback to determine appropriate receiver activation timing. This feedback mechanism ensures that second receiver activation for uplink transmission occurs only when it will not interfere with first network reception, thereby maintaining service continuity across both networks.
Data Source
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AI summary
A user equipment (UE) according to various embodiments may include a first subscriber identity module configured to correspond to a first cellular network, a second subscriber identity module configured to correspond to a second cellular network, a wireless communication circuit, and a processor configured to be operatively connected to the first subscriber identity module, the second subscriber identity module, and the wireless communication circuit, wherein the processor may be configured to determine a subscriber identity module to be used for Internet data communication among the first subscriber identity module and the second subscriber identity module as the first subscriber identity module, to perform a connection process for Internet data communication and IP multimedia subsystem (IMS) communication for a voice call with the first cellular network through the wireless communication circuit using first identification information about the first subscriber identity module, and to perform a connection process for the IMS communication with the second cellular network through the wireless communication circuit using second identification information about the second subscriber identity module, the processor being configured to configure a parameter for the UE to support a narrow bandwidth for the second cellular network in UE capability information and to transmit the UE capability information to the second cellular network.