Cascading Port Multiplier for Storage Scalability
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Solution Overview
Problem
Conventional port multipliers are limited to a single level of connecting devices, preventing cascading and thus limiting the advanced features and benefits they can provide in networked media systems.
Innovation Solution
An enhanced port multiplier mechanism that allows cascading by treating a standard 1:2 port multiplier as an enhanced 1:15 port multiplier, enabling it to connect multiple levels of devices and port multipliers through a novel enhancement protocol, which maintains standard communication signals while recognizing the port multiplier as having additional ports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a standard 1:2 port multiplier is used with conventional mechanisms, then the device complexity is kept simple, but the number of connected devices is limited to a single level
Solution Approach 1:
The patent implements cascading port multipliers where one port multiplier can connect to multiple other port multipliers in a nested chain structure. Each port multiplier in the cascade can further connect to additional devices or port multipliers, creating a nested hierarchy that exponentially increases the number of connected devices without requiring each individual component to be complex
Solution Approach 2:
The invention transitions from a single-level flat connection structure to a multi-level hierarchical cascade structure by adding a new dimensional aspect to the connection topology. This allows the system to scale from 2 devices to 15+ devices by utilizing cascading levels rather than simply adding parallel connections
2Quantity of substance
If port multiplier cascading is enabled, then the number of connected devices increases, but the communication protocol complexity increases
Solution Approach 1:
The enhanced port multiplier is designed to perform multiple functions: it can connect to host devices, connect to other port multipliers in cascade, and manage multiple device connections simultaneously. The same basic port multiplier hardware and standard communication signals are made multi-functional through software/firmware enhancement, avoiding the need for complex new protocols
Solution Approach 2:
The patent changes the operational parameters of the port multiplier through firmware or software enhancement, transforming a standard 1:2 port multiplier into an enhanced 1:15 port multiplier. This parameter change is achieved by modifying the device's identification and connection management capabilities rather than changing the physical communication signals
3Quantity of substance
If additional controllers are added to support more devices, then the number of connected devices increases, but the cost and device complexity increase
Solution Approach 1:
The enhanced port multiplier enables devices to self-configure and self-manage their connections in the cascade without requiring additional controllers. The port multiplier itself handles the complexity of managing multiple device connections, addressing, and communication protocols through its enhanced firmware, eliminating the need for separate controller hardware
Solution Approach 2:
The invention merges the functions of multiple controllers into a single enhanced port multiplier by utilizing the cascade structure. Instead of having separate controllers for each device or group of devices, the cascading port multipliers share the control and management functions throughout the hierarchy, reducing overall system complexity and cost
Data Source
AI summary
A method, apparatus and system for employing an enhanced port multiplier are provided. In one embodiment, a network host is configured to be coupled with a port multiplier in a network. The port multiplier is configured into being cascaded into being coupled with a plurality of port multipliers and a plurality of network devices.