Ethernet PHY Signaling for Extended Range at Lower Data Rates
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Solution Overview
Problem
Existing network standards, such as IEEE 802.3ch and IEEE 802.3bp, limit data transmission range and rates for automotive applications, necessitating the development of network devices that can extend these capabilities beyond specified limits.
Innovation Solution
Network layer devices are designed with echo cancellation and equalization functional components to support lower data rates and extended transmission ranges by incorporating additional signal generation components, enabling communication at alternative data rates not defined by the standard, such as using PAM3 modulation for 1 Gbps and PAM4 modulation for 10 Gbps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If network devices are designed to support higher data rates according to network standards, then data transmission speed is improved, but transmission range is limited to specified maximum distances
Solution Approach 1:
The network device dynamically adjusts operational parameters including data rate and transmission power based on channel conditions and distance requirements. The device can switch between different modulation schemes (PAM3, PAM4) and data rates (1 Gbps, 10 Gbps) to optimize performance for varying transmission distances, enabling extended range beyond standard specifications.
Solution Approach 2:
The invention changes physical and operational parameters of the transmission system including signal amplitude levels, modulation depth, and equalization settings. By adjusting these parameters, the device can maintain signal integrity over extended distances at lower data rates while preserving high-speed capability when needed.
2Speed
If network devices use standard functional components to meet nominal data rate requirements, then data rate performance is ensured, but transmission range cannot exceed standard specifications
Solution Approach 1:
The network device incorporates universal functional components that can operate across multiple data rates and transmission ranges. The echo cancellation and equalization components are designed to function effectively whether transmitting at 1 Gbps over 100 meters or 10 Gbps over 15 meters, providing multi-functionality that exceeds standard specifications.
Solution Approach 2:
The device dynamically adapts its operational mode based on communication requirements, switching between standard and extended range modes. This dynamic capability allows the same hardware to serve multiple functions across different IEEE 802.3 standards and beyond.
3Length of stationary object
If network devices incorporate additional signal generation components for lower data rates, then transmission range is extended, but device complexity increases
Solution Approach 1:
The invention merges multiple signal generation capabilities into integrated functional blocks. The echo canceller and equalizer are combined with signal generation components to create a unified signal processing chain that handles multiple data rates without requiring separate dedicated hardware for each function.
Solution Approach 2:
Additional components are designed with multi-functionality to justify their inclusion. The same echo cancellation and equalization components that support high-speed operation also enhance lower data rate transmission, providing benefits across multiple operational modes rather than adding dedicated components for each function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables longer transmission ranges and flexibility in data rates, allowing devices to communicate at lower rates effectively over extended distances, such as 100 meters at 1 Gbps using IEEE 802.3ch cables.
Implementation Method 1
an echo cancellation functional component (e.g., echo canceller) configured to cancel echo signals
Implementation Method 2
an equalization functional component (e.g., equalizer) configured to equalize signal levels
Implementation Method 3
signal modulation scheme (e.g., by a signal modulator) that enables generation of a transmit data signal carrying data frames at the lower data rate
Data Source
AI summary
Various embodiments provide for a network layer device, such as a physical layer network device based on an IEEE 802.x network standard, with extended transmission range. In particular, some embodiments enable a network layer device, that is designed to support network data communication in accordance with a known network standard and that comprises an echo cancellation functional component and an equalization functional component designed to support a nominal data rate defined by the known network standard, to communicate data at an alternative data rate that is lower than the nominal data rate and which may or may not be defined by the known network standard.