Mobile Terminal Test System Bandwidth Bottleneck
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Solution Overview
Problem
The existing mobile terminal test systems face challenges in handling large data amounts due to insufficient physical bandwidth, making it difficult to perform tests on devices with advanced communication standards like LTE, which require higher throughput.
Innovation Solution
A mobile terminal test system comprising two test apparatuses connected via a cable, with data generation, compression, encryption, and restoration units, controlled by a PC, to efficiently transmit and restore test signals, allowing for increased throughput testing without overwhelming physical bandwidth limitations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single mobile terminal test apparatus is used, then the device complexity is low, but the data transmission capacity is insufficient for high throughput testing
Solution Approach 1:
The test system is divided into multiple independent test apparatuses (first mobile terminal test apparatus and second mobile terminal test apparatus), each capable of generating and processing test signals separately. This segmentation allows the system to achieve higher aggregate data transmission capacity while maintaining manageable complexity through modular design.
Solution Approach 2:
A control PC is introduced as an intermediary to coordinate and manage multiple test apparatuses. The control PC handles the complexity of managing multiple devices, allowing individual test apparatuses to remain relatively simple while achieving high overall data transmission capacity through centralized control.
2Quantity of substance
If multiple test apparatuses are connected via cable, then the data transmission capacity increases, but the physical bandwidth of the cable becomes insufficient
Solution Approach 1:
The patent extracts only the essential test signal data and transmits it through the cable connection between test apparatuses. By taking out and transmitting only necessary data elements rather than complete test signal streams, the system overcomes cable bandwidth limitations while maintaining the ability to perform high throughput testing.
Solution Approach 2:
Test signals are pre-generated and prepared in the first mobile terminal test apparatus before transmission. The compression and selective transmission of pre-prepared test data allow the system to maximize cable utilization while achieving high overall data transmission capacity through efficient data preparation beforehand.
3Productivity
If the throughput requirement is increased for LTE testing, then the test capability improves, but the hardware performance becomes insufficient
Solution Approach 1:
Multiple test apparatuses are merged to work together on a single testing task, combining their individual processing capabilities to achieve high throughput testing. The first and second mobile terminal test apparatuses collectively provide the hardware performance needed for LTE throughput testing by distributing the processing load across multiple devices.
Solution Approach 2:
The system dynamically distributes test signal generation and processing tasks across multiple test apparatuses based on their capabilities and current workload. This dynamic allocation allows the system to scale test capability to meet high throughput requirements while efficiently utilizing the available hardware resources of each individual apparatus.
Data Source
AI summary
In response to a command from the control PC 4, the first mobile terminal test apparatus 2 compresses data of test signals including a first test signal and a second test signal which are generated and encrypted, and adds a restoration parameter to a header of the compressed data. The second mobile terminal test apparatus 3 acquires the restoration parameter-added compressed data at the second port 3a via the cable 5 from the first port 2a, and restores and encrypts the data of test signals before encryption, based on the restoration parameters. Under the control of the control PC 4, the first mobile terminal test apparatus 2 outputs the data of the first test signal to the device under test W, and the second mobile terminal test apparatus 3 outputs the data of the second test signal to the device under test W.