Method for detecting long luminance ONU in passive optical network

A passive optical network and long-emitting technology, applied in the field of communication, can solve problems such as increased equipment cost, failure to locate faults, and no alarm indication, etc., to achieve the effects of improving reliability, eliminating long-lasting faults, and improving satisfaction

Inactive Publication Date: 2010-09-01
FENGHUO COMM SCI & TECH CO LTD
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Problems solved by technology

[0004] First: In this solution, the serializer/deserializer (SerDes) and the media access controller (MAC) are separated in order to detect the clock lock signal, which greatly increases the cost of the device and is unnecessary
[0005] Second: Another shortcoming of this solution is that it cannot overcome the long-term lighti

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  • Method for detecting long luminance ONU in passive optical network
  • Method for detecting long luminance ONU in passive optical network
  • Method for detecting long luminance ONU in passive optical network

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[0054] The present invention will be further described in detail below in conjunction with the drawings.

[0055] image 3 It is the principle diagram of the detection device of the long-light ONU provided in the present invention. The optical module outputs the level signal TX_RSSI according to whether the light-emitting tube is light-emitting. Usually, a high level means "lighting" and a low level means "no light". The reverse is also possible. image 3 The long-light ONU detection device shown includes: an optical module TRX1 installed at the ONU end, for example, an optical module of RTXM169-504 can be selected; GPON media access controller (GPON MAC) IC1, for example, an optical module can be selected It is the GPON media access controller of BL2340R; flash chip IC2, for example, you can choose the flash chip of model S29GL128P11TF1V1; PMOS transistor T1. The above-mentioned optical module TRX1, GPON media access controller IC1, and flash chip IC2 can be configured by using ...

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Abstract

The invention discloses a method for detecting long luminance ONU in a passive optical network, which comprises that: a signal TX_RSSI transmitted by an optical module is detected after an ONU is normally powered up, and the signal TX_RSSI indicates that whether an optical signal is transmitted in the optical module; when the signal TX_RSSI indicates that the optical signal is output, the ONU judges whether high-level retention time of the signal TX_RSSI exceeds the minimum polling cycle of the passive optical network; and if the high-level retention time of the signal TX_RSSI exceeds the minimum polling cycle of the passive optical network, a GPON media access controller of the ONU transmits an ID number and a long luminance alarm to an OLT through an OMCI channel, and the ONU cuts off the transmission of the optical module by cutting off a transmitting power supply VCC_Tx of the optical module. The method for detecting the long luminance ONU in the passive optical network directly monitors light path signals, eliminates long luminance faults to the full extent, and can cut off the long luminance ONU and accurately report the alarm information, and improves the reliability of thedevice.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for detecting a long-emitting ONU (Optical Networks Unit) in a passive optical network (Passive Optical Networks, PON). Background technique [0002] In the GPON (Gigabit Passive Optical Networks) system, the optical line terminal OLT (Optical Line Terminal) connects multiple optical network units ONU (Optical Networks Unit) through the optical distribution network ODN (Optical Distribution Network). The uplink from the ONU to the OLT adopts the TDMA method, and all uplink data transmissions are controlled by the OLT. The OLT only allows one ONU to send upstream data at the same time. In order to avoid conflicts between ONUs, the OLT allocates different time slots to each ONU according to the bandwidth requirements of the ONUs. The ONU can only send upstream data in its own time slots, such as figure 1 As shown, the time slots of ONU1, ONU2, ONU3...ONUn are respec...

Claims

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Application Information

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IPC IPC(8): H04Q11/00H04B10/08H04B10/12H04B10/07H04B10/075
Inventor 李灵王阳
Owner FENGHUO COMM SCI & TECH CO LTD
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