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A management method and system for an optical network unit in a passive optical network
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A passive optical network and management method technology, applied in the field of optical network unit management, can solve problems such as unmanageable and unable to shut down ONU, and achieve reliable operation
Active Publication Date: 2011-12-21
产学研共同体(山东)科技成果转化有限公司
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Problems solved by technology
Therefore, the OLT has been unable to manage the ONU operation and maintenance management (OAM) messages through the unicast channel, and cannot shut down the faulty ONU.
Method used
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Embodiment 1
[0061] Embodiment one: in EPON, the present invention realizes the management method of a kind of optical network unit in the passive optical network, as Figure 4 As shown, the method includes the following steps:
[0062] Step 401: When the OLT detects that the EPON port receives abnormal light, it sends an OAM notification to all ONUs to turn off the light through the broadcast channel according to the OAM format agreed with the ONU;
[0063] The agreed OAM format may be an OAM frame format defined by IEEE802.3-2005 for manufacturer-defined extensions, such as Figure 5 As shown, it includes the following fields: destination address (Destination Address), source address (Source Address), length / type (Length / Type), subtype (Subtype), status bits (Flags), code (Code=0xff), valid Payload / Pad field, check sequence (FCS).
[0064] The OAM extension agreed with the ONU is as follows: in the Payload / Pad field, the first 3 bytes are OUI, which is an organization unique identifier...
Embodiment 2
[0080] Embodiment two: in GPON, the present invention realizes a kind of management method of the optical network unit in the passive optical network, such as Figure 6 As shown, the method includes the following steps:
[0081] Step 501: When the OLT detects that the GPON port receives abnormal light, according to the OMCI message format agreed with the ONU, it sends an OMCI message notifying all ONUs to turn off the light through the broadcast channel;
[0082] Described OMCI is the management control message in GPON, can agree in the extension of OMCI, the parameters such as SN, action of the ONU of control are placed in the field of OMCI extension; Described action comprises closing light-emitting and opening light-emitting;
[0083] Step 502: After each ONU receives the OMCI on the broadcast channel, it parses according to the agreed OMCI format, and after parsing out that the action is to turn off the light, turn off the optical module;
[0084] Step 503: The OLT contin...
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Abstract
The invention discloses a management method for optical network units in a passive optical network. When an optical line terminal (OLT) detects abnormal light reception at a passive optical network (PON) port, it sends a control message through a broadcast channel to control each The action of the ONU; the ONU performs the corresponding action according to the received control message; the OLT detects the faulty ONU according to the light receiving state of the PON port corresponding to the action of each ONU; the invention also discloses a passive optical network in the optical network Unit management system; through the solution of the present invention, the OLT controls the ONUs, can detect and isolate faulty ONUs, and only open normal ONUs, avoiding the impact of faulty ONUs on all ONUs on the PON port, ensuring PON Stable and reliable operation.
Description
technical field [0001] The invention relates to passive optical network technology, in particular to a management method and system for optical network units in a passive optical network. Background technique [0002] With the rapid development of communication technology, Passive Optical Network (PON, Passive Optical Network), as a last-milebroadbandaccess technology, has many advantages in terms of cost, network engineering implementation and maintenance, security, and multi-service support. , have advantages over other broadband access technologies. [0003] The basic structure of PON is as follows figure 1 As shown, it mainly includes: central office equipment - optical line terminal (OLT, Optical Line Terminal), equipment near the user side - optical network unit (ONU, Optical Network Unit), passive optical splitter and optical fiber lines, etc. [0004] The transmission direction from the OLT to the ONU is called the downstream direction, and the transmission direc...
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