摘要:
A system and method for implementing fairness in the powering of computing devices in a power over Ethernet (PoE) application. Power supplies in a power sourcing equipment are often oversubscribed. This oversubscription can lead to starvation of certain computing devices that have power requests that are not granted relative to competing requests. A fairness consideration can be implemented to ensure that starvation conditions are avoided.
摘要:
Communications over a wired data telecommunications network between and among power sourcing equipment (PSE), powered devices (PDs), and the like, take place over the wired medium by modulating an inline power signal. Any suitable communications protocol may be used and any suitable modulation scheme can be used. Examples of information to be communicated include: changing power requirements or capabilities (higher or lower) and acknowledgements thereof (permitting finer power class gradation than available under existing standards); sensor data; wireless data converted to wired data; status signaling, and the like. Such communications may be used for a number of purposes including supporting redundant provision of services over a network.
摘要:
An energy efficiency control policy library. Network devices can access the energy efficiency control policy library to download library control policies that are compatible with the network device. Such library control policies can be identified based on configuration information that is provided to the energy efficiency control policy library. In this control policy provider framework, the energy efficiency control policy library can be designed to monitor and analyze configuration and performance information that is uploaded from the network devices. Such continual monitoring and analysis would enable the energy efficiency control policy library to identify continual optimizations to the control policy in the network device.
摘要:
A system and method for using a link energy signal in physical layer devices (PHYs) having a silent channel/interface in energy efficient Ethernet (EEE). LPI modes in EEE suffer deficiencies in cable unplug detection due to the latency in refresh cycles. LPI modes in EEE also suffer from potential frequency drift, which leads to high bit error rate (BER) when coming out of LPI mode. A link energy signal transmitted during LPI modes enables real-time detection of cable unplug and the frequency lock to be maintained.
摘要:
A system and method for dynamic energy efficient Ethernet (EEE) control policy based on user or device profiles and usage parameters. The analysis by an EEE control policy can consider user or device related EEE profile information that is either network propagated or retrieved from a network database. This EEE profile information can be used in combination with static settings established by an IT manager and the properties of the traffic on the link itself.
摘要:
In an Ethernet network comprising link partners coupled via an Ethernet link, an energy efficient Ethernet network communication control policy may specify a power level mode. Power level control data may be communicated between a PHY and a MAC via an MII, MDIO or a bus that is not specified by 802.3. A device above a MAC layer device may comprise hardware, software and/or firmware that may communicate the control policy to the PHY layer device and/or MAC layer device. Control data may be inserted within an inter-packet gap, a data packet preamble and/or a Q ordered set and/or may be sent via an out-of-band signal. A response to the control data may be sent via an in band path and/or out of band path. Link partners may enter and/or exit a power mode, for example, a low power idle and/or a sub-rate mode based on the communicated control data.
摘要:
Signals may be communicated with A/V Bridging services between an upstream link partner and a down stream link partner, each comprising an asymmetric multi-rate Ethernet physical layer (PHY). High bandwidth A/V signals may be transmitted from the upstream link partner and low bandwidth signals may be transmitted from the downstream link partner. One or more of a time stamp, a traffic class and/or a destination address may be utilized in generating PDUs as well as data rate request and a resource reservation messages via the asymmetric Ethernet PHY. The receiving link partner may register for deliver of the PDUs. An aggregate communication rate may be distributed evenly or unevenly among one or more links for transmission and aggregated upon reception via asymmetric multi-rate Ethernet PHY operations. Compressed, uncompressed, encrypted and/or unencrypted signals may be handled. Signal processing may comprise echo cancellation, cross talk cancellation, forward error checking and equalization.
摘要:
A system and method for enabling power applications over a single communication wire pair. In one embodiment, a data transformer is provided that has three separate windings. Two of the windings are tied to each other via high frequency pass DC-blocking capacitors, or another suitable element that creates an AC path while providing a DC block, such that the voltage forms on either ends of the DC-blocking capacitors and the signal is sent on the outer legs of each winding. A circuit measures the current draw (I) and injects a current proportional to, but smaller than, I into a third bias cancellation winding.
摘要:
A system and method for enabling portable diagnostics in a configurable device. Physical layer device technology can be implemented into a configurable device (e.g., handheld device) to perform diagnostics. The configurable device can be enabled for diagnostics through an authentication module that performs an authentication and/or licensing function. Diagnostic information (e.g., channel characteristics, data analysis, traffic analysis, packet analysis, bit analysis, etc.) can be displayed on a display of the configurable device to assist field personnel.
摘要:
A method and system are provided in which a broadband gateway may enable a guest or visitor to access content available to the broadband gateway. The content may be received by the broadband gateway through one or more of a plurality of network access service providers that may provide separate physical layer access to the broadband gateway. After a visitor's device is connected to the broadband gateway, the broadband gateway may classify the device. Based on the classification, the device may be authorized to access a portion of the content received. Once the authorization process is complete, the appropriate content may be made available and transferred to the device. The authorization process may include the authentication of a device identifier and/or a user identifier. The authorized access may be time-limited, but may be renewed or enabled when a request is received within a determined period of time.