Priority Inversion for Latency-Sensitive Bulk Interface Traffic
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Solution Overview
Problem
Latency-sensitive data traffic, particularly from high-resolution peripherals like webcams, often experiences delays due to being transmitted over non-isochronous channels, which are de-prioritized, leading to poor user experience.
Innovation Solution
The method involves identifying peripherals connected to an information handling system, determining their interface type and data traffic priority, and re-classifying priority-inversed data traffic to be transmitted over an isochronous channel with lower latency, thereby updating an index and placing it in a higher-priority queue.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If latency-sensitive data traffic is transmitted over non-isochronous channels, then device compatibility and interface flexibility are improved, but transmission latency and user experience deteriorate
Solution Approach 1:
The patent inverts the traditional priority assignment by detecting when bulk interface traffic actually contains latency-sensitive data (through heuristic analysis of device parameters and traffic patterns) and re-prioritizing it to match or exceed isochronous traffic priority, thereby resolving the contradiction between interface flexibility and transmission latency
Solution Approach 2:
The system dynamically changes the priority parameter of data traffic based on detected characteristics. By analyzing device parameters (resolution, frame rate, encoding type) and traffic patterns, the system adjusts priority levels in real-time, allowing bulk interface traffic to receive higher priority when latency sensitivity is detected
2Loss of time
If isochronous channels are used for all latency-sensitive traffic, then transmission latency is reduced, but channel requirements and system complexity increase
Solution Approach 1:
The patent introduces an intermediary priority-reversal mechanism between the bulk interface and the transmission channel. This intermediary layer analyzes traffic characteristics and dynamically adjusts priority without requiring physical channel changes, thereby reducing latency for sensitive traffic while maintaining interface simplicity and avoiding isochronous channel requirements
Solution Approach 2:
The system performs self-service by automatically detecting latency-sensitive traffic patterns and re-prioritizing them without external intervention. The heuristic analysis of device parameters and traffic characteristics enables the system to autonomously optimize transmission priority, reducing latency while maintaining bulk interface simplicity
Data Source
AI summary
Priority reversing data traffic for latency sensitive peripherals, including receiving a connection notification and parameters of a peripheral; identifying, from the parameters, that an interface type associated with the peripheral is a bulk interface, the bulk interface associated with a first communication channel between the IHS and the peripheral and having a first latency; determining, based on the bulk interface type and a data traffic priority associated with the peripheral, that the data traffic associated with the peripheral is priority-inversed; in response to a communication request by an application executing on the IHS for communication with the peripheral, determining that the data traffic associated with the peripheral is priority-inversed, and in response, placing the data traffic in a queue associated with a second communication channel defined between the IHS and the peripheral, the second communication channel having a second latency, wherein the first latency is greater than the second latency.