Wired Interface Signal Detection for Presence and Signaling Type
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Solution Overview
Problem
Existing communications networks often fail to detect both the presence of a signal and its signaling type on a communications link, which is necessary for devices to wake up from idle states and function correctly.
Innovation Solution
A device with a processor and physical interface is configured to detect signal presence and type on a wired communication link by analyzing signal properties such as voltage and periodicity, using components like common-mode detectors, analog comparators, and synchronizers to determine if a signal is present and whether it is single-ended or differential.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional communications networks are used, then device simplicity is maintained, but signal presence and signaling type detection capability is insufficient
Solution Approach 1:
The detection system is divided into separate functional modules: a signal presence detector that determines whether any signal is present on the communication link, and a signaling type detector that identifies the specific type of signaling (e.g., differential, single-ended). This segmentation allows each module to specialize in one detection task, improving overall measurement precision while keeping individual modules relatively simple.
Solution Approach 2:
The physical interface is designed with multi-functional detection capabilities that can identify multiple signaling types through a unified detection mechanism. The signaling type detector can recognize various signaling standards (such as USB 2.0, USB 3.0, and other differential or single-ended signaling) using the same hardware infrastructure, reducing overall device complexity while enhancing detection capability.
2Use of energy by moving object
If devices remain in low-power states, then energy consumption is reduced, but network responsiveness deteriorates
Solution Approach 1:
The signal presence detector continuously monitors the communication link for signal presence even when the device is in a low-power state. This preliminary detection action allows the device to quickly transition from idle to active state when signaling is detected, reducing the effective response time and improving network responsiveness without requiring continuous full-power operation.
Solution Approach 2:
The detection system employs periodic sampling of the communication link at configured intervals during low-power states. This periodic monitoring maintains energy efficiency by not continuously consuming full power, while still enabling timely detection of signaling events that require device activation, thus balancing power consumption with network responsiveness.
Data Source
AI summary
A device may include a processor and a physical interface communicatively coupled to the processor and configured to communicatively couple to a second device via a wired communication link having a communications protocol comprising a plurality of signaling types, and further configured to detect a presence or absence of signaling on the wired communication link based on one or more signal properties of a signal on the wired communication link, and detect a signaling type, from the plurality of signaling types, of signaling on the wired communication link based on one or more signal properties of the signal on the wired communication link.