Adaptive Output Level Control for Mobile Terminal Reception Sensitivity Testing
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Solution Overview
Problem
Current mobile terminal testing devices require a long time to perform reception sensitivity tests on multiple Component Carriers (CCs) due to linear output level changes, which prolongs the testing process, especially when using Carrier Aggregation technology for high-speed communication.
Innovation Solution
A mobile terminal testing device and method that includes a signal generator, throughput measurement means, determination means, and integrated determination result calculation means to set non-linear output levels for each CC, ending throughput measurement when a measurement end condition is reached, and continuing the test until all CCs meet the condition, thereby reducing overall testing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If linear output level change method is used for reception sensitivity test, then measurement precision is maintained, but testing time is significantly prolonged
Solution Approach 1:
The patent applies dynamics by transitioning from a static linear output level change method to a dynamic adaptive output level change method. The system continuously monitors throughput values and adjusts the output level change amount accordingly - increasing the change amount when throughput is high and decreasing it when throughput is low, thereby optimizing the testing process in real-time to reduce overall testing time while maintaining measurement precision
Solution Approach 2:
The patent changes the parameter of output level adjustment from a fixed linear increment to a variable increment based on throughput measurements. By introducing a throughput-dependent adjustment mechanism, the system can adaptively modify the output level change amount, allowing faster convergence when conditions permit and more careful measurement when needed, thus resolving the contradiction between speed and precision
2Reliability
If throughput measurement is continuously performed for all CCs until all reach end condition, then complete test coverage is achieved, but testing time is further extended
Solution Approach 1:
The patent applies partial action by allowing the reception sensitivity test to proceed and be determined based on results from a subset of CCs. When any one CC reaches its throughput end condition, the system can determine the overall reception sensitivity without requiring all CCs to complete their measurements, thus achieving sufficient test coverage while significantly reducing testing time
Solution Approach 2:
The system performs preliminary throughput measurements for multiple CCs in parallel and determines when sufficient data has been collected to make a reliable reception sensitivity determination. This allows the test to conclude as soon as adequate information is obtained rather than waiting for all CCs to complete, maintaining reliability while reducing time
Data Source
AI summary
In the measurement device 1, a reception sensitivity test control unit 18 ends throughput measurement of a CC using a throughput measurement unit 18b in a case where an end determination unit 18c1 determines that any of a plurality of CCs has reached a measurement end condition, and calculates a total status obtained by integrating a determination result for each CC using a total status calculation unit 18c2 by performing each “PASS” or “FAIL” determination for a remaining CC. Since an output level variable setting unit 18d performs a process of setting a next output level for the CC that has not reached the measurement end condition based on the total status, a control is performed to continue a reception sensitivity test until all CCs reach a measurement end condition.