Network Device Power Distribution via PoE and PTP
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Solution Overview
Problem
Existing network devices face challenges in reliably supplying power to multiple units while preventing overload and ensuring continuous data connection, particularly in real-time audio and image transmission applications.
Innovation Solution
A network device configuration where multiple devices are connected in series, using a single power supply unit that compares total power requirements against output capacity, utilizing the PoE protocol and precision time protocol, and includes a switchgear assembly to manage power distribution and display status via LEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If multiple network devices are connected in series to a single power supply unit, then the complexity of power distribution is reduced, but the risk of power overload increases
Solution Approach 1:
The network device performs preliminary calculations of total power requirements before activating power delivery to downstream devices. The equipment determines the sum of power inputs for itself and connected devices, compares this with available power output, and only then addresses the switchgear assembly to enable power supply if sufficient capacity exists.
Solution Approach 2:
The system implements feedback through continuous monitoring of power consumption and availability. The network device receives information about power input requirements from connected devices, calculates total demand, compares with available power output, and adjusts power distribution accordingly through the switchgear assembly.
2Ease of manufacture
If power is supplied to multiple network devices through a single cable, then the ease of installation is improved, but the precision of power management deteriorates
Solution Approach 1:
The network device acts as an intermediary between the power supply unit and downstream devices. It receives power through a single cable, calculates total power requirements including its own consumption and that of connected devices, and intelligently manages power distribution through switchgear assembly based on available capacity.
Solution Approach 2:
The network device performs multiple functions: it processes data signals, manages power reception from the single cable, calculates total power requirements, compares with available output, and controls power distribution to multiple downstream devices through the switchgear assembly.
3Reliability
If the network device calculates and compares total power requirements, then the reliability of power distribution is improved, but the device complexity increases
Solution Approach 1:
The power management functions are merged with the data processing functions in the network device. The equipment that already processes data signals also performs power requirement calculations, comparisons, and control decisions, eliminating the need for separate power management hardware.
Solution Approach 2:
The network device performs self-service by autonomously calculating its own power requirements, receiving power input information, determining total power demands including downstream devices, comparing with available power output, and making independent decisions about power distribution through the switchgear assembly.
Data Source
AI summary
The invention relates, inter alia, to a network device (10) which can be connected via electrical lines (15, 16) to other subscribers (18a, 18b, 12, 13) of a network (42), in particular a real-time intercom network (42), for transmitting audio and/or image information, wherein the network device (10) comprises at least one input-side terminal (22a) for connection to a power supply source (11) and at least one output-side terminal (22b) for connection to at least one second network device (12), wherein signals and operating voltage (PoE) can be transmitted via the terminals, using at least the following four layers (32, 33, 34, 35):a) PTP layer (precision time protocol),b) ethernet layer,c) data and/or information layer,d) PoE (power over ethernet) layer.