Optical Transmission Device Data Compression for FEC Payload Allocation
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Solution Overview
Problem
As optical transport networks (OTNs) transition from beyond-100G to 400G and beyond, they face increased channel noise due to growing transmission rates over the same distances, leading to poor service transmission performance.
Innovation Solution
A data processing method that compresses data streams to reserve a portion of the payload area for forward error correction (FEC) codes within the data frame, dynamically determining the size of this area based on compression ratios, and performing rate adaptation to reduce transmission noise and improve performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the OTN interface rate is increased to support higher service traffic capacity, then the transmission capacity is improved, but the channel noise increases and service transmission performance deteriorates
Solution Approach 1:
The patent applies forward error correction (FEC) codes to the service data before transmission. This preliminary action allows the receiver to correct errors that occur during transmission, thereby maintaining service transmission performance even when channel noise increases due to higher transmission rates
Solution Approach 2:
The patent changes the data representation parameters by compressing service data to reduce its bit width. This parameter change allows the same transmission capacity to be achieved with fewer bits, reducing the impact of channel noise and improving transmission performance
2Reliability
If data compression is applied to reserve payload area for FEC codes, then service transmission performance is improved, but data processing complexity increases
Solution Approach 1:
The patent performs data compression and FEC code insertion in advance at the transmitting end. This preliminary action simplifies the receiving end operations, as it only needs to perform decompression and FEC decoding without needing to dynamically allocate payload areas, thereby balancing the overall system complexity
Solution Approach 2:
The patent creates a compressed copy of the service data with embedded FEC codes in the payload area. This copying approach allows the original data structure to be preserved in logic while using an optimized compressed format for actual transmission, reducing processing complexity
Data Source
AI summary
Embodiments of this application disclose a data processing method, an optical transmission device, and a digital processing chip, for improving service transmission performance. In the data processing method, an optical transmission device compresses a to-be-transmitted data stream to obtain a compressed data stream. The optical transmission device then obtains a size of a first payload area corresponding to the compressed data stream and maps the compressed data stream to a data frame, where the data frame includes an overhead area and a payload area. The payload area includes the first payload area and a second payload area. The second payload area carries the compressed data stream, and the first payload area carries a forward error correction (FEC) code. The data frame is then transmitted by the optical transmission device.