Multi-Endpoint Sideband Adapter for PCIe Connector
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Solution Overview
Problem
The existing PCIe Card ElectroMechanical (CEM) specification provides only a single set of sideband links per connector, which is insufficient for many emerging use cases involving multiple endpoint devices accessible via the PCIe connector, limiting the efficiency and versatility of sideband communications in information handling systems.
Innovation Solution
An Information Handling System (IHS) is designed with a first set of adapter sideband connections connecting to a board sideband communication subsystem, and respective second sets of adapter sideband connections connecting to endpoint devices, along with an adapter sideband communication processing system that provides an adapter sideband communication engine to manage and route sideband communications based on predefined policies, enabling efficient communication with multiple endpoint devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single set of sideband links per PCIe connector is used, then the device complexity is reduced and ease of manufacture is improved, but the adaptability and versatility for multiple endpoint devices deteriorates
Solution Approach 1:
The patent segments the sideband communication capability by providing multiple independent sideband link sets (first set, second set, third set) instead of a single unified link. Each sideband link set can be independently configured and routed to different endpoint devices, enabling multi-endpoint communication while maintaining manageable complexity through modular architecture
Solution Approach 2:
The adapter device provides universal sideband communication capability by implementing multiple sideband link sets that can serve different endpoint devices interchangeably. The sideband communication engine can dynamically route communications to any connected endpoint device, making the system adaptable to various configurations without requiring dedicated hardware for each endpoint
2Adaptability or versatility
If multiple sideband link sets are provided for multiple endpoint devices, then the adaptability and versatility are improved, but the device complexity increases
Solution Approach 1:
The patent introduces a sideband communication engine as an intermediary component that manages communications across multiple sideband link sets. This engine abstracts the complexity of routing and protocol management, allowing multiple endpoint devices to be connected through standardized interfaces while the engine handles the complex task of directing communications to the appropriate endpoints based on device identifiers and communication policies
3Productivity
If multiple adapter sideband connections are implemented, then the productivity and communication efficiency are improved, but the ease of operation and configuration becomes more difficult
Solution Approach 1:
The sideband communication engine implements self-service capabilities by automatically discovering connected endpoint devices, negotiating communication parameters, and configuring routing paths without requiring manual intervention. The engine can autonomously manage the multiple sideband connections, allocating resources and optimizing communication paths based on real-time system state, thereby maintaining ease of operation while supporting high productivity
Data Source
AI summary
A multi-endpoint device sideband communication system includes a board including a board sideband communication subsystem coupled to a connector on the board. A multi-endpoint adapter device is connected to the board via the connector, and includes an adapter sideband communication subsystem connected to the connector via a first set of adapter sideband connections, and to each of a plurality of endpoint devices included on the multi-endpoint adapter device via respective second sets of adapter sideband communication connections. The adapter sideband communication subsystem receives a first sideband communication from the board sideband communication subsystem via the connector and, based on a first sideband communication policy stored in the adapter sideband communication subsystem, provides the first sideband communication to at least one of the plurality of endpoint devices via each respective second set of adapter sideband communication connections connected to that endpoint device.