摘要:
A method and an apparatus for self-calibration of an ONU receiver in a multi-wavelength PON system, said method including the initial physical layer scan of the receiver tuning range, distributed estimation of the down-stream wavelength channel drift with respect to the nominal standard-based wavelengths, and reporting the estimated downstream wavelength channel drift in the downstream Channel_Map message.
摘要:
A method and an apparatus for processing upstream data abnormity are provided. The method includes: an Optical Line Terminal (OLT) detecting that upstream data is abnormal, the OLT instructing one or more Optical Network Units (ONUs) to stop transmitting the upstream data and/or instructing one or more ONUs to change a physical channel. By means of stopping ONUs from transmitting upstream data and/or changing the physical channels of ONUs, the present invention solves the problem of the upstream data abnormity in the related art, thereby can avoid the impact on normal service transmission of ONUs, and ensure the quality of the network service.
摘要:
A method of Noisy Window and associated management messages to support set splitting if activating ONUs with uncalibrated transmitter, offering a power grant for unmodulated upstream transmission, measuring the average received optical power in all upstream wavelength channels and providing downstream indication of the upstream activation in the optical communication network wavelength channel with abnormally high average received power.
摘要:
Provided is a network equipment and an authentication and key management method for the same. The network equipment generates a Network Key (NK); the network equipment performs authentication protocol interaction with opposite communication equipment, and calculates a Basic Session Key (BSK) according to parameters for the authentication protocol interaction and the NK; and the network equipment calculates link Encryption Keys (EKs) used respectively for Media Access Control (MAC) and Physical (PHY) layers using various access technologies according to the BSK, and provides the EKs for respective MAC and PHY layer function modules. With the disclosure, the legality of the equipment is verified by performing an authentication process on the heterogeneous network equipments in one pass, and keys in various MAC layer technologies are managed in a unified way.
摘要:
The invention discloses are an optical line terminal, an optical network unit, a passive optical network system, an upstream bandwidth allocation method and a rate adaptation method. The OLT comprises: an optical module, a clock and data recovery module, a media access control chip and a control module, wherein, the optical module is configured to receive upstream data sent by ONUs having different transmission rates; the clock and data recovery module is configured to receive the upstream data, recover a clock signal according to the upstream data, and send the upstream data and the clock signal corresponding to the upstream data to the media access control chip; the media access control chip is configured to save the upstream data and the clock signal corresponding to the upstream data; the control module is configured to, according to the clock signal corresponding to the upstream data, acquire an upstream rate of the upstream data, and allocate an upstream bandwidth to the ONU according to the upstream rate.
摘要:
Provided are a method and device for configuring an OTDR test parameter set. The above-mentioned method comprises: an FMS acquiring related information about an ODN according to a test result fed back by an OTDR; and the FMS configuring a test parameter set required for one or more subsequent OTDR tests according to the related information. According to the technical solution provided in the present invention, the test parameter set required for initiating an OTDR test can be accurately acquired.