A NEMA edge gateway is provided, which can be connected to a mobile communication network and can be used with a NEMA Luminaire of an existing streetlight to receive electrical energy from circuitry of the streetlight. The NEMA edge gateway can provide networking and power for a serial device and an IP device respectively, making both of them operate smoothly and able to be networked, and thereby expanding IoT applications. This is also to resolve difficulty in finding locations for placing gateways in order to greatly increase the number of gateways built in urban areas and fulfill increasing local communication service requirements.

A system that maintains power consumption of a network to a predefined limit. A plurality of elements such as components, nodes and modules may be connected in a daisy chain configuration. Power may be inserted to one or more of the elements which may proceed down the chain to be consumed by the one or more elements. However, there a limit as to the total amount of energy that may be consumed at the same time. Thus, power to the elements may be scheduled so that the limit is not exceeded by at any one time. At the same time, communications may proceed through that chain from element to element. An example of the present system may be a power over a network (PoE).

Embodiments of a device and method are disclosed. In an embodiment, a method of communications involves at a communications device, receiving a request for changing a network parameter of the communications device and at the communications device, granting or denying the request based on link status information that is stored in the communications device, where the link status information specifies a link failure status of a communications link within a wired communications network that involves the communication device.

In one embodiment, a method includes receiving at a thermal modeling module, data from a Power Sourcing Equipment device (PSE) for cables extending from the PSE to Powered Devices (PDs), the cables configured to transmit power and data from the PSE to the PDs, calculating at the thermal modeling module, thermal characteristics for the cables based on the data, and identifying a thermal rise above a specified threshold at one of the cables. The data comprises real-time electrical data for the cables. An apparatus and logic are also disclosed herein.

Intelligent illumination device are disclosed that use components in an LED light to perform one or more of a wide variety of desirable lighting functions for very low cost. The LEDs that produce light can be periodically turned off momentarily, for example, for a duration that the human eye cannot perceive, in order for the light to receive commands optically. The optically transmitted commands can be sent to the light, for example, using a remove control device. The illumination device can use the LEDs that are currently off to receive the data and then configure the light accordingly, or to measure light. Such light can be ambient light for a photosensor function, or light from other LEDs in the illumination device to adjust the color mix.

A PoE system includes a plurality of PoE devices and a hub that are coupled in a ring configuration through a plurality of network cables. The hub is coupled to two of the network cables, and provides electric power to at least one of the network cables that is coupled to the hub. Each of the PoE devices is coupled to two of the network cables, receives electric power from one of the two network cables, and supplies electric power to the other one of the two network cables. As a consequence, each of the PoE devices can be directly or indirectly powered by the hub.

In one embodiment, a method includes applying Forward Error Correction (FEC) to data at power sourcing equipment, transmitting the data and pulse power over a wire pair to a powered device, identifying data transmitted during power transitions between a pulse power on time and a pulse power off time in the pulse power at the powered device, and applying FEC decoding to at least a portion of the data based on said identified power transitions.

The present invention provides a power supply system and power supply method thereof for Power over Ethernet. The power supply system is configured to: calculate a static allocation remaining power and a dynamic allocation remaining power of power sourcing equipment; and determine whether a consuming power of powered device is greater than the static allocation remaining power and the dynamic allocation remaining power. When the consuming power is less than or equal to the static allocation remaining power and is less than or equal to the dynamic allocation remaining power, the powering system is configured to perform a static powering procedure. When the consuming power is greater than the static allocation remaining power and is less than or equal to the dynamic allocation remaining power, the powering system is configured to perform a dynamic powering procedure.

Power over Ethernet system having multiple power source devices comprising a control device that controls power distribution to a plurality of communication ports. In the control device, a master controller provides a power supply to power consumption look-up-table to a plurality of control circuits in various manners via a series bus. When one power source device shuts down, each control circuit can rapidly shut off selected port switches connected thereto.

The present invention provides an OBD interface bus type detection method and apparatus. The method includes: determining a first bus feature of a connection cable associated with a selected pin in an on-board diagnostics OBD interface; matching the first bus feature with an OBD interface bus library and determining a bus type of the connection cable associated with the selected pin; determining, according to the bus type of the connection cable associated with the selected pin, a second bus feature of the connection cable associated with the selected pin; and sending the second bus feature to a vehicle diagnostic instrument, to enable the vehicle diagnostic instrument to perform communications protocol scanning on the selected pin in the OBD interface according to the second bus feature. According to the present invention, a communications protocol meeting the second bus feature may be directly used by the vehicle diagnostic instrument to perform diagnostic scanning on the selected pin, thereby reducing scanning interference for different bus types.