Multi-SIM Data Transmission via Base Station Mapping
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Solution Overview
Problem
Current data transmission methods for SIM cards in multi-SIM terminals often result in high delay and inefficiency, particularly when sending data to a specific SIM card, as they require paging all base stations in the tracking area, which is not suitable for low-delay requirements.
Innovation Solution
A data transmission method that determines the presence of a second SIM card on a terminal and sends target indication information to the base station accessed by that SIM card, allowing the data to be sent directly to the first SIM card through that base station, reducing the need to page all base stations and conserving resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is sent to a SIM card by paging all base stations in the tracking area, then the data transmission can reach the target SIM card, but the transmission delay increases and system resources are wasted
Solution Approach 1:
The patent introduces a terminal identifier and SIM card identifier as intermediary information that enables the base station to directly identify and send data to the target SIM card without paging all base stations. The core network sends the terminal identifier and SIM card identifier to the base station, which uses these identifiers to locate the specific SIM card on the terminal, thus reducing transmission delay while maintaining reliability.
Solution Approach 2:
The patent performs preliminary action by pre-establishing the association between terminal identifier, SIM card identifier, and base station information in the core network before data transmission is needed. When data needs to be sent, the core network can immediately query the appropriate base station using the stored mapping relationships, avoiding the time-consuming paging process and enabling direct data delivery.
2Reliability
If data is sent to a SIM card by paging all base stations, then the data can be delivered to the target, but system resources and energy are consumed inefficiently
Solution Approach 1:
The patent extracts the essential identifying information (terminal identifier and SIM card identifier) from the complex paging process. Instead of broadcasting paging messages to all base stations in the tracking area, the system uses these extracted identifiers to directly address the specific base station and SIM card, significantly reducing system resource consumption and energy waste while ensuring reliable data delivery.
Solution Approach 2:
The patent changes the parameter of data transmission from broadcast-based paging to address-specific direct transmission. By changing the transmission mode from sending data to multiple base stations to sending data only to the specific base station identified through the identifier mapping, the system reduces resource consumption and energy usage while maintaining delivery reliability.
3Adaptability or versatility
If the system supports multiple SIM cards on a terminal, then user versatility is improved, but data routing complexity increases
Solution Approach 1:
The patent segments the data routing process into distinct identification stages: first identifying the terminal using the terminal identifier, then identifying the specific SIM card using the SIM card identifier. This segmentation of the routing process into hierarchical identification steps simplifies the overall complexity by breaking down the multi-SIM routing problem into manageable, sequential decision points rather than requiring complex simultaneous routing logic.
Data Source
AI summary
A data transmission method including: when target data is required to be sent to a first SIM card on a terminal which supports a plurality of subscriber identity module (SIM) cards, determining whether there is a second SIM card on the terminal; and when there is a second SIM card, sending target indication information to a base station which the second SIM card accesses.