Dual-SIM DSDA Carrier Aggregation Through Dynamic Band Allocation
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Solution Overview
Problem
The fixed division of carrier aggregation capabilities for dual SIM cards in a DSDA mode restricts the available bands and data transmission speed of terminal devices, limiting user experience.
Innovation Solution
A terminal device coordinates carrier aggregation capabilities by reporting serving cell information or band combination lists to an access network device using a secondary user identity, allowing dynamic adjustment of available bands for both SIM cards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed division is used to specify bands for each SIM card, then device complexity is reduced and ease of operation is improved, but carrier aggregation capability is restricted and data transmission speed deteriorates
Solution Approach 1:
The patent implements dynamic band allocation where the network device adjusts the available band list for each SIM card based on real-time carrier aggregation status. When carrier aggregation is activated, the network device dynamically modifies which bands are available to each SIM card, allowing flexible coordination of band resources between SIM1 and SIM2 to maximize data transmission speed while avoiding fixed division limitations.
2Device complexity
If fixed division is used to specify bands for each SIM card, then device complexity is reduced, but carrier aggregation capability is restricted and data transmission speed deteriorates
Solution Approach 1:
The network device dynamically adjusts the available band list for each SIM card based on carrier aggregation status, enabling flexible band coordination between SIM1 and SIM2. This dynamic approach allows the system to achieve high data transmission speeds through carrier aggregation without requiring complex manual configuration, as the network device automatically manages band allocation.
Solution Approach 2:
The terminal device feeds back its carrier aggregation capability and band usage status to the network device. Based on this feedback, the network device adjusts the available band list for each SIM card, creating a closed-loop control system that optimizes data transmission speed while managing device complexity automatically.
3Productivity
If dynamic adjustment of available bands is implemented, then data transmission speed is improved, but device complexity and coordination requirements increase
Solution Approach 1:
The network device serves as an intermediary that manages band allocation between SIM1 and SIM2. Instead of requiring complex coordination between the two SIM cards themselves, the network device receives feedback from the terminal about carrier aggregation status and automatically adjusts the available band list for each SIM card, simplifying the overall system architecture while enabling dynamic band coordination for high data transmission speeds.
Data Source
AI summary
A terminal device obtains first information or second information, where the terminal device supports a first user identity and a second user identity, the first information includes information about a serving cell of the first user identity, and the second information includes a band combination list or a band list supported by the second user identity; and the terminal device sends the first information or the second information to a first access network device by using the second user identity, where the first access network device is an access network device accessed by the terminal device by using the second user identity.