PCIe Upstream Port Lane Margining Controller for Signal Quality
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Solution Overview
Problem
Current PCIe systems lack the ability to control lane margining operations in upstream ports, which limits the optimization of signal settings and link performance, particularly at high data speeds and in environments with varying physical layer characteristics.
Innovation Solution
Incorporating a lane margining controller and port setting controller in PCIe devices to manage lane margining operations, enabling the transmission of margin commands and determining settings based on margin status information, thereby controlling the upstream port to optimize transmitter and receiver settings in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional PCIe systems are used without lane margining control, then device complexity is reduced, but link performance and signal quality deteriorate at high data speeds
Solution Approach 1:
The patent introduces a lane margining controller as an intermediary component between the upstream port and external devices. This controller mediates the margining operations by generating margin commands, receiving margin status information, and coordinating with the port setting controller to adjust transmitter and receiver settings, thereby improving link performance without requiring complete system redesign
Solution Approach 2:
The patent implements dynamic adjustment of physical layer parameters including voltage levels, equalization settings, and timing parameters through the port setting controller. By changing these parameters based on margin status information, the system optimizes signal quality and link performance for different physical layer characteristics and transmission distances
2Manufacturing precision
If lane margining control is implemented in upstream ports, then signal quality is improved, but device complexity increases
Solution Approach 1:
The patent merges the lane margining control functionality with the existing upstream port structure. The lane margining controller and port setting controller are integrated into the PCIe device architecture, sharing resources and coordination mechanisms with other port components, which reduces the incremental complexity compared to implementing margining as a completely separate system
Solution Approach 2:
The upstream port performs self-diagnosis and self-optimization through automated margining operations. The lane margining controller automatically generates margin commands and the port setting controller autonomously adjusts settings based on received margin status information, reducing the need for external intervention and manual calibration while maintaining high signal quality
3Adaptability or versatility
If real-time margining operations are performed, then adaptability to different environments is improved, but loss of time increases due to additional control operations
Solution Approach 1:
The patent performs lane margining operations during link training and initialization phases before normal data transmission begins. By completing the time-consuming margining and setting adjustment operations in advance, the system achieves adaptability to different physical layer characteristics without causing time loss during actual data communication
Solution Approach 2:
The system implements periodic margining operations at scheduled intervals rather than continuously. The lane margining controller can be configured to perform margining checks at specific times or under specific conditions, balancing the need for environmental adaptability with the constraint of minimizing time loss during normal operations
Data Source
AI summary
Devices for performing communications are disclosed. In some implementations, a device includes: an upstream port for receiving data from or transmitting data to one or more external devices located on an upstream path through a link including a plurality of lanes; a lane margining controller coupled to the upstream port and for transmitting, via the upstream port, to the one or more external devices, a margin command for requesting a lane margining operation to acquire margin status information to indicate a margin of each of the plurality of lanes, and controlling the upstream port to receive the margin status information from the external devices; and a port setting controller coupled to be in communication with the upstream port to receive the margin status information and for determining a setting of the upstream port based on the margin status information.