Telemetry Processor Bandwidth Optimization via Sync Word Extraction
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Solution Overview
Problem
Current telemetry systems face challenges in efficiently aggregating and transmitting data from multiple pulse code modulation channels, particularly in remote or hazardous environments, due to limitations in data synchronization and bandwidth utilization.
Innovation Solution
A telemetry processor is designed with multiple communications interfaces to buffer and encapsulate sensor data into CCSDS-standard compliant data packets, using pairs of RS-422 interfaces for simultaneous transmission of even and odd bits, thereby increasing bandwidth and reducing the need for sync words in data synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple pulse code modulation channels are aggregated into a time division multiplexing stream, then data transmission bandwidth is improved, but data synchronization complexity increases
Solution Approach 1:
The patent extracts and eliminates the need for sync words from the data transmission system. By using a start delimiter and end delimiter approach instead of traditional sync words, the system reduces synchronization complexity while maintaining bandwidth efficiency. The sync word extraction principle is applied by removing redundant synchronization markers and replacing them with simpler delimiter-based synchronization.
2Reliability
If sync words are used for data synchronization, then data transmission reliability is improved, but bandwidth utilization decreases
Solution Approach 1:
The patent removes sync words from the transmission stream and replaces them with start and end delimiters. This extraction of redundant synchronization elements maintains reliability through alternative means (delimiter-based synchronization) while significantly improving bandwidth utilization by eliminating the overhead of sync word transmission.
Solution Approach 2:
The patent changes the synchronization parameter from sync words to delimiter pairs. This parameter change allows the system to maintain synchronization reliability through a different mechanism that is more bandwidth-efficient. The transition from sync word-based to delimiter-based synchronization represents a fundamental parameter change in the synchronization approach.
3Speed
If real-time data transmission is implemented with stringent constraints, then response time is improved, but data buffering requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-defining the structure of time division multiplexing frames and pre-establishing delimiter-based synchronization mechanisms. This allows the system to handle real-time data transmission requirements without needing large buffers, as the frame structure and synchronization delimiters are prepared in advance, enabling efficient real-time processing with minimal buffering requirements.
Data Source
AI summary
Methods and apparatus are provided for telemetry processing using a telemetry processor. The telemetry processor can include a plurality of communications interfaces, a computer processor, and data storage. The telemetry processor can buffer sensor data by: receiving a frame of sensor data using a first communications interface and clock data using a second communications interface, receiving an end of frame signal using a third communications interface, and storing the received frame of sensor data in the data storage. After buffering the sensor data, the telemetry processor can generate an encapsulated data packet including a single encapsulated data packet header, the buffered sensor data, and identifiers identifying telemetry devices that provided the sensor data. A format of the encapsulated data packet can comply with a Consultative Committee for Space Data Systems (CCSDS) standard. The telemetry processor can send the encapsulated data packet using a fourth and a fifth communications interfaces.