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1. (WO2018157300) LEGALITY DETECTION METHOD FOR POWER OVER ETHERNET DEVICE, AND POWER SOURCING EQUIPMENT AND SYSTEM

Pub. No.:    WO/2018/157300    International Application No.:    PCT/CN2017/075247
Publication Date: Sat Sep 08 01:59:59 CEST 2018 International Filing Date: Wed Mar 01 00:59:59 CET 2017
IPC: H04L 12/10
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: WANG, Haifei
王海飞
Title: LEGALITY DETECTION METHOD FOR POWER OVER ETHERNET DEVICE, AND POWER SOURCING EQUIPMENT AND SYSTEM
Abstract:
A legality detection method for an power over Ethernet device, and a power sourcing equipment (PSE) and system, relating to the field of communications, for use in resolving the problem of a recognition error occurring in legality detection of a PD (12) caused by common mode noise existing in a voltage output by a PSE (11) during a legality detection process of a power over Ethernet device. When detecting the access of the PD (12), the PSE (11) continuously outputs a first measuring current within a first period of time by means of an Ethernet port, detects a first measuring voltage of the Ethernet port when outputting the first measuring current, determines a measured impedance of the Ethernet port according to the first measuring current and the first measuring voltage, and determines, according to the measured impedance of the Ethernet port, whether the PD (12) accessing the PSE (11) is a legal PD.