Self-Describing Link Parameter Determination via Sideband Retrieval
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Solution Overview
Problem
Determining parameters of a communications link in information handling systems, such as link quality and maximum supported communications speeds, is complex due to variations in hardware and software components, making it difficult to ensure configuration flexibility and optimal performance.
Innovation Solution
An information handling system that includes a processor, a device communicatively coupled via a cable assembly, and a management controller using a sideband interface to retrieve and combine self-describing signal integrity critical parameters from non-transitory computer-readable media integral to the device and cable assembly, allowing for aggregate parameter determination and actions relevant to the communications link.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If configuration flexibility is increased through multiple backplanes, risers, and internal cables, then adaptability is improved, but device complexity increases
Solution Approach 1:
The system enables self-service by having components automatically provide their own electrical characteristic data through self-describing parameters stored in memory. Each component (cable assembly, backplane, riser, device) contains and communicates its own electrical characteristics without requiring external measurement or manual configuration, allowing the system to self-determine optimal link parameters.
Solution Approach 2:
The patent applies preliminary action by pre-storing electrical characteristic data in memory within each component before assembly. The self-describing parameters are prepared in advance in a standardized format, so that when components are connected, the management controller can immediately retrieve and process this pre-prepared information to determine link parameters without requiring real-time measurement or complex analysis.
2Measurement precision
If manual determination of link parameters is performed, then measurement precision can be maintained, but productivity decreases
Solution Approach 1:
The patent replaces manual or mechanical measurement systems with an electronic information retrieval system. Instead of physically measuring electrical characteristics with test equipment, the system electronically retrieves pre-stored self-describing parameters from memory in each component. This substitution maintains measurement precision by using accurate manufacturer-specified data while dramatically increasing productivity through automated electronic communication.
Solution Approach 2:
The management controller acts as an intermediary that automatically retrieves, combines, and processes electrical characteristic data from multiple components. This intermediary function eliminates the need for manual parameter determination while ensuring accurate link parameter selection by systematically processing information from all relevant components in the signal path.
3Adaptability or versatility
If component variations are accommodated, then adaptability is improved, but difficulty of detecting and measuring increases
Solution Approach 1:
The patent addresses component variations by changing the parameter representation format to standardized self-describing parameters. Instead of dealing with diverse, proprietary parameter formats from different manufacturers, all components use a common standardized format that includes electrical characteristics such as impedance, signal loss, and bandwidth. This standardization makes it easy to detect and measure link parameters regardless of component variations.
Solution Approach 2:
The management controller provides a universal function by being able to retrieve and process self-describing parameters from any component type (cable assemblies, backplanes, risers, devices) regardless of manufacturer or specific model. This universal interface and standardized parameter format enable the system to accommodate various component variations while simplifying the detection and measurement process through a single unified approach.
Data Source
AI summary
An information handling system may include a processor, a device communicatively coupled to a processor via a communications link including a cable assembly, and a management controller communicatively coupled to the processor and communicatively coupled to the device and the cable assembly via a sideband interface, and configured to: retrieve, via the sideband interface, self-describing signal integrity critical parameters from non-transitory computer-readable media integral to the device; retrieve, via the sideband interface, self-describing signal integrity critical parameters from non-transitory computer-readable media integral to the cable assembly; combine the self-describing signal integrity critical parameters from non-transitory computer-readable media integral to the device and the self-describing signal integrity critical parameters from non-transitory computer-readable media integral to the cable assembly into aggregate signal integrity critical parameters; and perform an action relevant to the communications link based on the aggregate signal integrity critical parameters.