Isochronous BLE Packet Error Rate Measurement Test Device
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Solution Overview
Problem
There is a lack of standardized procedures for measuring packet error rates (PER) on Bluetooth Low Energy (BLE) channels, particularly on isochronous channels, which are crucial for assessing link quality in BLE implementations.
Innovation Solution
A method and test device are provided to establish an isochronous BLE connection between a test device and an implementation under test, transmitting test data packets and receiving response packets to calculate the PER based on the ratio of successfully received responses to total test data packets transmitted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a standardized procedure for PER measurement on BLE isochronous channels is implemented, then measurement precision is improved, but device complexity increases due to the need for specialized test equipment and protocols
Solution Approach 1:
The test device functionality is segmented into two separate components: a test host that generates test packets and a test device that measures PER. This segmentation allows the complex measurement functionality to be distributed, with the test host handling packet generation and the test device focusing on measurement, thereby reducing the complexity burden on a single device while maintaining measurement precision.
Solution Approach 2:
A standardized test protocol acts as an intermediary between the test host and test device, defining clear interfaces for packet generation, transmission, and measurement. This intermediary layer simplifies the interaction between components and enables precise PER measurement without requiring complex integrated systems.
2Device complexity
If PER measurement on BLE isochronous channels is performed using existing non-standardized methods, then device complexity is reduced, but measurement precision deteriorates due to lack of standardized procedures
Solution Approach 1:
The test device is designed with universal functionality that can measure PER on various BLE channel types including isochronous channels. By creating a multi-functional test device that adheres to standardized protocols, the solution achieves both simplicity (through standardized interfaces) and precision (through proper measurement capabilities) simultaneously.
3Reliability
If comprehensive test procedures are implemented to ensure compliance with BLE requirements, then reliability is improved, but loss of time increases due to extensive testing during development and production
Solution Approach 1:
The test procedures are designed to perform preliminary compliance checks during the development phase using standardized protocols. By conducting comprehensive PER measurements and compliance tests early in the development process rather than during final production testing, the solution ensures reliability while minimizing time loss during critical production periods.
Data Source
AI summary
The invention provides an analysis of a Bluetooth Low Energy implementation by measuring a packet error rate (PER) on a communication channel between the BLE implementation and a test device.