Dual-SIM Communication Configuration for Antenna Resource Management
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Solution Overview
Problem
In dual-card single-pass smartphones, the limited antenna resources cause interference between SIM cards, particularly when one card is engaged in high-realtime data services like online gaming, leading to freezes and poor user experience.
Innovation Solution
The method involves configuring the second SIM card to communicate with a SIP server using either UDP or TCP transmission modes, and after completing SIP requests and responses, interrupting the established TCP socket to avoid antenna resource preemption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the second SIM card uses TCP transmission mode for IMS service, then communication reliability is improved, but antenna resource preemption occurs causing freezes in high-realtime applications
Solution Approach 1:
The patent dynamically switches the transmission mode of the second SIM card from TCP to UDP based on the operational state of the first SIM card. When the first SIM card is engaged in high-realtime applications, the system automatically configures the second SIM card to use UDP mode, avoiding antenna resource conflicts. This dynamic adaptation resolves the contradiction by allowing reliable communication when needed while preventing freezes during critical operations.
Solution Approach 2:
The patent changes the transmission protocol parameter from TCP to UDP for the second SIM card under specific conditions. By modifying this key parameter, the system eliminates the harmful effect of antenna resource preemption while maintaining the ability to communicate with IMS servers. This parameter change enables the system to prioritize low-delay performance over connection reliability when necessary.
2Reliability
If the second SIM card maintains continuous TCP socket connection, then service availability is improved, but antenna resource preemption causes freezes during high-realtime data communication
Solution Approach 1:
The system dynamically adjusts the socket connection strategy based on real-time conditions. When the first SIM card performs high-realtime operations, the system closes the TCP socket of the second SIM card, preventing antenna resource preemption. This dynamic decision-making eliminates time loss while maintaining service availability through rapid socket re-establishment when needed.
Solution Approach 2:
The patent takes preliminary action by closing the TCP socket of the second SIM card before it can cause antenna resource preemption and freezes. By detecting the operational state of the first SIM card in advance and proactively managing the second SIM card's socket connection, the system prevents harmful effects before they occur, ensuring smooth data transmission during high-realtime applications.
3Device complexity
If both SIM cards use the same antenna resource, then device simplicity is maintained, but interference between cards degrades user experience
Solution Approach 1:
The patent implements dynamic resource allocation by switching the second SIM card to UDP mode when the first SIM card is engaged in high-realtime operations. This dynamic configuration allows both SIM cards to coexist on the same antenna without causing harmful interference, as UDP traffic does not block TCP connections. The system maintains simplicity by keeping a single antenna while eliminating interference through protocol-level management.
Data Source
AI summary
A communication configuration method and apparatus are provided. The method is applied to an electronic device, the electronic device includes at least two Subscriber Identity Module (SIM) cards, where the first SIM card of the electronic device is used to provide mobile data service communication, and the second SIM card is registered with an IP Multimedia Subsystem (IMS) service. The method includes: in a case that the electronic device is used as a Session Initiation Protocol (SIP) client, configuring that the second SIM card communicates with a SIP server by using a User Datagram Protocol (UDP) transmission mode, or configuring that the second SIM card communicates with the SIP server by using a Transmission Control Protocol (TCP) transmission mode, and after determining that the second SIM card has completed sending of a SIP request and receiving of a SIP response, interrupting an established TCP socket.