Optical USB-Thunderbolt Transceiver With Adaptive Channel Switching
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Solution Overview
Problem
Existing copper wire-based communication systems for USB and Thunderbolt protocols face challenges in maintaining high-quality data transfer at increased data rates, particularly above 20 Gbps, due to bit error rate requirements and long-distance transmission issues, and current optical solutions have limitations in integration, power consumption, and complexity.
Innovation Solution
A mode-adaptive optical fiber transmission system that detects USB sideband signals and low-frequency periodic signaling to determine communication modes, enabling single-channel or dual-channel transmission over optical links with adaptive amplitude modulation and power modulation, reducing complexity and power consumption while maintaining compatibility with USB and Thunderbolt protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If copper wire is used for USB/Thunderbolt communication, then compatibility with existing protocols is maintained, but bit error rate increases and transmission quality deteriorates at data rates above 20 Gbps
Solution Approach 1:
The patent replaces copper wire-based electrical signal transmission with optical fiber-based optical signal transmission. The electro-optical interface converts electrical USB/Thunderbolt signals to optical signals for transmission, and the opto-electrical interface converts received optical signals back to electrical signals. This substitution eliminates the signal degradation and bit error issues inherent in copper wire transmission at high data rates above 20 Gbps, while maintaining protocol compatibility through signal conversion.
2Speed
If optical modules with clock recovery circuits are used to achieve 20 Gbps or higher data transfer rates, then data transfer speed is improved, but the optical module operating range is exceeded and manufacturing complexity increases
Solution Approach 1:
The patent changes the data transfer rate parameter from fixed optical module rates (10.3125 Gbps, 24.33 Gbps, 25.78125 Gbps, 28.05 Gbps) to a continuous range achievable through electro-optical conversion. By using USB/Thunderbolt protocol signal conversion rather than dedicated optical module rates, the system achieves 20 Gbps or higher data transfer rates without exceeding optical module operating ranges or requiring complex clock recovery circuits.
3Adaptability or versatility
If USB sideband signals are transmitted over copper wire, then USB communication mode can be detected, but signal quality and reliability deteriorate at high data rates
Solution Approach 1:
The patent substitutes copper wire transmission with optical fiber transmission for USB sideband signals. The electro-optical interface converts electrical sideband signals to optical signals, transmits them over optical fiber, and the opto-electrical interface converts them back to electrical signals for detection. This substitution maintains signal quality and reliability during communication mode detection, enabling accurate detection of USB communication modes without the signal degradation inherent in copper wire transmission at high data rates.
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 system achieves efficient, high-speed, and low-power optical fiber transmission compatible with USB3, USB4, and Thunderbolt protocols, addressing the limitations of copper wire systems and previous optical solutions by enabling flexible channel configuration and reduced power usage.
Implementation Method 1
Some embodiments include an electro-optical interface configured to receive a first set of one or more USB or Thunderbolt electrical signals from a USB system
Implementation Method 2
transmit these converted optical signals via one or more optical communication channels to another electro-optical interface
Implementation Method 3
an opto-electrical interface configured to receive a second set of one or more USB or Thunderbolt optical signals from the optical communication channel and convert the second set of one or more optical signals to a corresponding second set of one or more USB or Thunderbolt electrical signals
Data Source
AI summary
Systems and methods to implement a USB and Thunderbolt optical signal transceiver are described. One method includes detecting presence of a USB sideband signal received over an optical communication channel and associated with a USB communication request. Responsive to the detecting, the method may determine that the USB communication request corresponds to a USB communication mode and perform a sideband negotiation. The USB communication mode may be enabled. A specified number of channels associated with the USB communication request may be determined. USB communication may be performed using the specified number of channels over the optical communication channel in the USB communication mode.