Multi-SIM Paging Capability Signaling for Service Switching
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Solution Overview
Problem
Conventional communication systems with multiple subscriber identity modules (SIMs) can only support one SIM at a time, affecting the services of other SIMs.
Innovation Solution
A network device transmits a capability parameter to a terminal indicating multi-card capabilities, allowing the terminal to manage communication services across multiple SIMs, including adding service information to paging messages, switching between SIMs, transmitting data, and determining paging messages based on service lists.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal supports multiple SIMs but only performs communication service for one SIM at a time, then the terminal can maintain simple communication management, but communication services of other SIMs are affected
Solution Approach 1:
The patent segments communication services by introducing separate service information elements for different SIMs within paging messages. Each SIM's service information is independently managed and transmitted, allowing the terminal to selectively activate different SIMs without affecting others. This segmentation enables multi-SIM support while maintaining efficient single-SIM communication at any given time.
Solution Approach 2:
The patent implements preliminary action by pre-configuring service information for multiple SIMs in the network device before actual communication occurs. The network device stores service information for multiple SIMs and can quickly switch between them when needed, allowing the terminal to have multiple SIMs ready without immediately activating all of them, thus avoiding service interference.
2Productivity
If service information is added to paging messages to support multiple SIMs, then communication service availability improves, but data overheads increase
Solution Approach 1:
The patent applies local quality by adding service information only to paging messages when needed, rather than continuously transmitting all SIM information. The service information element is selectively included in paging messages based on the current communication state and active SIM, reducing unnecessary data transmission while maintaining the ability to switch between SIMs when required.
Solution Approach 2:
The patent implements partial action by including only the necessary service information for the currently active SIM in paging messages, rather than transmitting complete information for all SIMs. This partial inclusion of service information reduces data overheads while still enabling the terminal to switch between SIMs when needed, balancing service availability with data efficiency.
3Reliability
If the terminal manages multiple SIMs independently, then communication accuracy improves, but device complexity increases
Solution Approach 1:
The patent applies universality by implementing a unified service information element structure that can handle multiple SIMs through a standardized framework. The same paging message format and service information mechanism work for all SIMs, allowing the terminal to manage multiple SIMs independently while using consistent procedures, thus reducing the actual complexity increase despite supporting multiple SIMs.
Data Source
AI summary
Methods for information transmission, a network device, and a terminal are provided in the disclosure. The disclosure relates to the field of mobile communication. The method includes transmitting a capability parameter to a terminal, where the capability parameter is used to indicate a multi-card capability supported and/or allowed by a network device. The terminal can negotiate with the network device according to the multi-card capability supported and/or allowed by the network device, and adjust communication of multiple UMTS subscriber identity modules (USIMs) in the terminal.