Reconciliation Sub-Layer for 1000BASE-T Data Transmission
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Solution Overview
Problem
Existing data communication systems face challenges in integrating data streams from different sources with varying speeds and transmission requirements into a single, seamless network, particularly when these buses operate at different data rates and need to share a common transmission medium like UTP wiring using modern 1000BASE-T standards.
Innovation Solution
A method and architecture that append a data type identification (DTID) to each byte of the data stream to create a technology-independent stream, matching the bit rate to a second communications standard, and use FIFO buffers to ensure seamless transmission over a 1000BASE-T physical layer, allowing data from IEEE 1394b, USB, or other buses to be transmitted up to 100 meters on UTP wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data streams from different communication buses with varying speeds are integrated into a single transmission medium, then the versatility and adaptability of the network is improved, but the complexity of the transmission system increases due to the need to precisely match disparate data rates
Solution Approach 1:
The patent introduces a reconciliation sub-layer as an intermediary between different communication buses and the physical transmission medium. This sub-layer receives data streams from various sources (IEEE 1394b, USB, etc.), standardizes them into a unified format with consistent bit rates, and then transmits them over the common 1000BASE-T physical medium. The reconciliation sub-layer acts as a mediator that handles the complexity of rate matching internally, allowing higher-level protocols to focus on data transmission without worrying about physical layer compatibility issues.
Solution Approach 2:
The patent changes the bit rate parameter of incoming data streams to match the requirements of the 1000BASE-T physical medium. The reconciliation sub-layer adjusts the data rate from various input formats (e.g., 800 Mbps IEEE 1394b, 12 Mbps USB) to a standardized 1000 Mbps output format. This parameter transformation enables different data sources to operate at their native speeds while maintaining compatibility with the target transmission medium.
2Speed
If faster transmission technology like 1000BASE-T is used to transmit data from slower buses, then the transmission speed and distance are improved, but the complexity of the interface circuitry increases
Solution Approach 1:
The patent segments the transmission system into distinct functional layers: source buses (IEEE 1394b, USB), a reconciliation sub-layer for rate matching and standardization, and the 1000BASE-T physical medium. This segmentation allows each component to be optimized independently - the source buses maintain their native speeds and protocols, the reconciliation layer handles the complex rate matching, and the physical layer provides high-speed transmission. The interface circuitry is divided into manageable functional blocks within the reconciliation sub-layer.
Solution Approach 2:
The reconciliation sub-layer is designed as a universal interface that can accept multiple input formats from different communication buses and convert them to a single standardized output format for 1000BASE-T transmission. This multi-functional design allows the same circuitry to handle various data sources (IEEE 1394b, USB 1.0, USB 2.0, etc.) without requiring separate dedicated interfaces for each protocol, thereby managing complexity through generalization.
3Adaptability or versatility
If data from multiple communication buses are transmitted over a common UTP wiring using 1000BASE-T standards, then the network infrastructure is simplified and unified, but the difficulty of detecting and measuring different data rates increases
Solution Approach 1:
The reconciliation sub-layer serves as an intermediary that translates and standardizes data from various communication buses before transmission over the unified 1000BASE-T medium. By converting all incoming data streams to a standardized format with consistent bit rates and protocols, the sub-layer eliminates the complexity of detecting and measuring different data rates at the physical layer. The unified medium receives only standardized data, simplifying detection and measurement while maintaining support for multiple original formats.
Data Source
AI summary
Methods and Systems for transmitting data originating according to a first communications standard over a physical layer using a second communications standard are provided. A data stream is received from a physical transmission medium that uses particular first communications standard. Next, a data type identification (DTID) is appended to each byte in the data stream, thereby creating a technology independent data stream having a particular bit rate. This bit rate is then matched to a different bit rate that corresponds to a second communications standard. The technology independent data stream is then transmitted over a physical transmission medium that uses the second communications standard.