RAT Selection via Throughput Comparison
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Solution Overview
Problem
Current wireless communication systems lack an efficient method to automatically select the optimal radio access technology (RAT) for providing optimal communications services, leading to suboptimal data transfer throughputs.
Innovation Solution
A communication apparatus equipped with a processor and memory device that camps on multiple cells associated with different RATs, measures and compares data transfer throughputs, and switches to the RAT with higher theoretical throughput for improved data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple RATs are supported in one mobile station, then communication service coverage and flexibility are improved, but the complexity of selecting the optimal RAT increases
Solution Approach 1:
The mobile station automatically performs RAT selection by comparing measured throughput with theoretical throughput values stored in the SIM card, without requiring manual intervention or complex external control systems. The device serves itself by autonomously determining the optimal RAT based on predefined criteria and stored information.
Solution Approach 2:
Theoretical throughput values for different RATs are pre-stored in the SIM card before the mobile station operates. This preliminary preparation allows the device to quickly compare and select the optimal RAT without performing complex real-time calculations, thereby reducing selection complexity while maintaining adaptability.
2Productivity
If automatic RAT selection is implemented, then data transfer throughput is improved, but the complexity of the selection mechanism increases
Solution Approach 1:
The mobile station autonomously measures actual throughput, retrieves theoretical throughput values from the SIM card, compares them, and automatically switches to the optimal RAT without requiring complex external control or manual configuration. This self-service approach improves productivity while keeping the mechanism relatively simple.
Solution Approach 2:
The system continuously measures actual data transfer throughput and uses this feedback to determine whether to switch RATs. By comparing measured throughput with theoretical values and automatically adjusting the selected RAT, the system creates a feedback loop that optimizes productivity without requiring overly complex mechanisms.
3Measurement precision
If throughput measurement and comparison is performed, then optimal RAT selection accuracy is improved, but the time required for RAT selection increases
Solution Approach 1:
Theoretical throughput values for multiple RATs are pre-stored in the SIM card during manufacturing or provisioning. This preliminary action eliminates the need for complex real-time calculations, allowing the mobile station to quickly compare measured throughput with pre-computed theoretical values, thereby maintaining measurement precision while minimizing selection time.
4Measurement precision
If theoretical throughput data is stored in SIM card, then RAT selection accuracy is improved, but the memory requirement increases
Solution Approach 1:
The patent extracts only the essential theoretical throughput data needed for RAT selection and stores it in the SIM card, separating this selection-critical information from other SIM card functions. This extraction approach provides sufficient accuracy for RAT selection while minimizing the memory burden on the SIM card by storing only the most relevant parameters.
Data Source
AI summary
A communication apparatus is provided. A processor camps on a first cell, which is associated with a first radio access technology (RAT) and belongs to a first wireless network, via a radio transceiver module, and further camps on a second cell, which is associated with a second RAT and belongs to a second wireless network, via the radio transceiver module. The processor constructs a first packet switch connection with the first wireless network via the first cell to perform data transfer in the first wireless network, measures a first data transfer throughput of the first wireless network when performing the data transfer via the cell, and determines to perform the data transfer in the second wireless network via the second cell when a theoretical data transfer throughput corresponding to the second RAT is higher than the first data transfer throughput.