CN101854563A - Processing method of discovery process in EPON (Ethernet Passive Optical Network) - Google Patents
Processing method of discovery process in EPON (Ethernet Passive Optical Network) Download PDFInfo
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- CN101854563A CN101854563A CN200910057012A CN200910057012A CN101854563A CN 101854563 A CN101854563 A CN 101854563A CN 200910057012 A CN200910057012 A CN 200910057012A CN 200910057012 A CN200910057012 A CN 200910057012A CN 101854563 A CN101854563 A CN 101854563A
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Abstract
The invention discloses a realization method of a discovery process in an EPON (Ethernet Passive Optical Network), which comprises the following steps of: 1. broadcasting a discovery authorization message to an unregistered ONU (Optical Network Unit) by a hardware interface module of an OLT (Optical Line Terminal) in a variable cycle; 2. sending a registration request message to the OLT by the unregistered ONU in an appointed discovery window; 3. authenticating the registration request message by the CPU (Central Processing Unit) of the OLT, registering the ONU allowing to be registered and assigning an LLID (Logical Link Identifier); generating a registration message by the CPU of the OLT, and sending to a newly registered ONU by the hardware interface module; 4. sending a registration confirmation message to the OLT by the newly registered ONU in an assigned uplink time slot; and 5. receiving the registration confirmation message by the CPU of the OLT. Through the invention, the discovery process can be processed by the OLT in a software mode, so that the processing method is more flexible, and more complicated functions can be realized.
Description
Technical field
The present invention relates to the EPON network field, particularly relate to the processing method of the process of finding in a kind of EPON network.
Background technology
EPON (Ethernet Passive Optical Network, Ethernet passive optical network) in the network, OLT (optical line terminal, optical line terminal) adopts TDM (time divisionmultiplex, time division multiplexing) a plurality of ONU of mode control and management (optical network unit, optical network unit) are to the uplink communication of OLT.OLT is the ONU distribution ascending time slot of each registration by standard authorization messages (normal GATEmessage), and ONU can only send upstream data in the ascending time slot of appointment.
The discovery process of EPON network (discovery process) is meant the process of ONU new access or off-line to OLT registration, adding EPON network.The discovery process generally includes following steps by OLT control, sees also Fig. 1:
In the 1st step, the hardware interface module of OLT is found authorization messages (discovery GATE message), the time started and the length of having specified discovery window (discovery window) in this discovery authorization messages with the fixed cycle to unregistered ONU broadcasting.
In the 2nd step, unregistered ONU sends login request message (REGISTER_REQ message) to OLT after receiving and finding authorization messages in the discovery window of its appointment.
In the 3rd step, after the hardware interface module of OLT is received login request message, be these ONU registrations and distribution LLID (logical link identification, LLID).
The hardware interface module of OLT sends registration message (REGISTER message) and standard authorization messages to the ONU of new registration, and this standard authorization messages has distributed ascending time slot for the ONU of these new registrations.
In the 4th step, after the ONU of new registration receives registration message and standard authorization messages, in the ascending time slot that the standard authorization messages is distributed, send registration confirmation message (REGISTER_ACKmessage) to OLT.
In the 5th step, after the hardware interface module of OLT was received registration confirmation message, the discovery process of EPON network was finished.
In the discovery process of EPON network, OLT sends and receives various message and realizes that by hardware interface module its advantage is that response speed is fast, operational efficiency is high at present, and flexibility is relatively poor, the simple shortcoming of function but also bring.
Summary of the invention
Technical problem to be solved by this invention provides the implementation method of the process of finding in a kind of EPON network, and this method both can guarantee response speed and higher running efficiency faster, and complicated function can be provided again.
For solving the problems of the technologies described above, find in the EPON network of the present invention that the implementation method of process comprises the steps:
In the 1st step, the hardware interface module of OLT is found authorization messages with the variable cycle to unregistered ONU broadcasting, comprises time started and the length of finding window in this discovery authorization messages;
The described variable cycle is by the CPU decision of OLT;
In the 2nd step, after unregistered ONU receives and finds authorization messages, in finding the specified discovery window of authorization messages, this sends login request message to OLT;
The 3rd step after the hardware interface module of OLT is received login request message, was forwarded to the CPU of OLT with this login request message, and the CPU of OLT carries out authentication to this login request message, and for the ONU registration that allows registration and distribute LLID;
The CPU of OLT produces registration message, and is sent by the ONU of hardware interface module to new registration;
The DBA hardware module of OLT is that the ONU of new registration distributes ascending time slot, and sends the standard authorization messages by hardware interface module to the ONU of new registration, and this standard authorization messages is the ascending time slot information that comprises the ONU that distributes to new registration;
In the 4th step, after the ONU of new registration receives registration message and standard authorization messages, in the ascending time slot that the standard authorization messages is distributed, send registration confirmation message to OLT;
In the 5th step, after the hardware interface module of OLT is received registration confirmation message, this registration confirmation message is forwarded to the CPU of OLT.
After adopting method of the present invention, ONU is not being had under the situation of special requirement and restriction, making that OLT authentication to ONU in the discovery process is more flexible, complicated, can realize more flexible and complicated LLID allocation strategy simultaneously.
Description of drawings
The present invention is further detailed explanation below in conjunction with drawings and Examples.
Fig. 1 be find process in the existing EPON network respectively go on foot schematic diagram;
Fig. 2 be find process in the EPON network of the present invention respectively go on foot schematic diagram.
Embodiment
The processing method of finding process in the EPON network of the present invention comprises the steps, sees also Fig. 2:
In the 1st step, the hardware interface module of OLT is found authorization messages with the variable cycle to unregistered ONU broadcasting, comprises time started and the length of finding window in this discovery authorization messages.
The described variable cycle is by the CPU decision of OLT.When the CPU of OLT finds that registered ONU number hour, just adopts short variable cycle length, thereby can accelerate the discovery process.When the CPU of OLT finds that registered ONU number is big, just adopt long variable cycle length, thereby can improve the upstream bandwidth utilance.In other words, get two moment arbitrarily, the variable cycle length in the moment that registered ONU number is many is more than or equal to the registered ONU number variable cycle length in the little moment.
In the 2nd step, after unregistered ONU receives and finds authorization messages, in finding the specified discovery window of authorization messages, this sends login request message to OLT.
The 3rd step after the hardware interface module of OLT is received login request message, was buffered in this login request message earlier in a FIFO (first in first out, the first in first out) buffer, was forwarded to the CPU of OLT again.
The purpose of setting up the FIFO buffer is a situation of receiving a large amount of login request message in order to tackle in same discovery window.The login request message received of buffer memory OLT hardware interface module not only in the FIFO buffer is gone back the RTT (Round Trip Time, loop time) of each login request message of buffer memory.
The CPU of OLT carries out authentication to the ONU that sends login request message, i.e. whether decision allows these ONU that sends login request message registrations, and is to allow the ONU registration of registration and distribute LLID.
The CPU of OLT produces registration message, and is sent by the ONU of hardware interface module to new registration.Produce the registration message content in the configuration registry message more neatly by the CPU of OLT, for example flags (sign) can be made as nack or reregister etc.
DBA among the cpu command OLT of OLT (Dynamic Bandwidth Allocation, Dynamic Bandwidth Allocation) hardware module is the ONU distribution ascending time slot of new registration, the hardware of OLT generates the standard authorization messages then, this standard authorization messages comprises the ascending time slot information that the DBA module assignment of OLT is given the ONU of new registration, and then the hardware interface module by OLT sends this standard authorization messages to the ONU of new registration.
In the 4th step, after the ONU of new registration receives registration message and standard authorization messages, in the ascending time slot that the standard authorization messages is distributed, send registration confirmation message to OLT;
In the 5th step, after the hardware interface module of OLT is received registration confirmation message, this registration confirmation message is forwarded to the CPU of OLT.Receive a large amount of registration confirmation message in order to be supported in the same discovery window equally, the OLT hardware interface module is buffered in the registration confirmation message of receiving earlier in the one FIFO buffer, is transmitted to CPU again and handles.
Adopt the processing method of the process of finding in the EPON network of the present invention, the final login state table of OLT in the discovery process of IEEE 802.3 normalized definitions (Discovery processing OLT FinalRegistration State Diagram) can be realized by the CPU employing software approach of OLT fully.
Claims (4)
1. find the implementation method of process in the EPON network, it is characterized in that described method comprises the steps:
In the 1st step, the hardware interface module of OLT is found authorization messages with the variable cycle to unregistered ONU broadcasting, comprises time started and the length of finding window in this discovery authorization messages;
The described variable cycle is by the CPU decision of OLT;
In the 2nd step, after unregistered ONU receives and finds authorization messages, in finding the specified discovery window of authorization messages, this sends login request message to OLT;
The 3rd step after the hardware interface module of OLT is received login request message, was forwarded to the CPU of OLT with this login request message, and the CPU of OLT carries out authentication to this login request message, and for the ONU registration that allows registration and distribute LLID;
The CPU of OLT produces registration message, and is sent by the ONU of hardware interface module to new registration;
The DBA hardware module of OLT is that the ONU of new registration distributes ascending time slot, and sends the standard authorization messages by hardware interface module to the ONU of new registration, and this standard authorization messages is the ascending time slot information that comprises the ONU that distributes to new registration;
In the 4th step, after the ONU of new registration receives registration message and standard authorization messages, in the ascending time slot that the standard authorization messages is distributed, send registration confirmation message to OLT;
In the 5th step, after the hardware interface module of OLT is received registration confirmation message, this registration confirmation message is forwarded to the CPU of OLT.
2. find the implementation method of process in the EPON network according to claim 1, it is characterized in that, in the 1st step of described method, in any two moment, the variable cycle length in the moment that registered ONU number is many is more than or equal to the registered ONU number variable cycle length in the little moment.
3. find the implementation method of process in the EPON network according to claim 1, it is characterized in that, in the 3rd step of described method, after the hardware interface module of OLT is received login request message, with in this login request message and RTT buffer memory to the FIFO buffer, be forwarded to the CPU of OLT more earlier;
In the 5th step of described method, after the hardware interface module of OLT is received registration confirmation message, with in this registration confirmation message buffer memory to FIFO buffer, be forwarded to the CPU of OLT more earlier.
4. find the implementation method of process in the EPON network according to claim 1, it is characterized in that, in the 3rd step of described method, DBA hardware module among the cpu command OLT of OLT is that the ONU of new registration distributes ascending time slot, OLT generates the standard authorization messages then, this standard authorization messages comprises the ascending time slot information that the DBA module assignment of OLT is given the ONU of new registration, and then the hardware interface module by OLT sends this standard authorization messages to the ONU of new registration.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012167577A1 (en) * | 2011-11-29 | 2012-12-13 | 华为技术有限公司 | Method and system for discovering optical network unit |
| WO2014047844A1 (en) * | 2012-09-27 | 2014-04-03 | 华为技术有限公司 | Logical link identifier (llid) registration method, device and system |
| WO2014094643A1 (en) * | 2012-12-21 | 2014-06-26 | Huawei Technologies Co., Ltd. | Round trip time aware dynamic bandwidth allocation for ethernet passive optical network over coaxial network |
| WO2017049460A1 (en) * | 2015-09-22 | 2017-03-30 | 华为技术有限公司 | Optical network unit registration method, device and system |
| WO2017101438A1 (en) * | 2015-12-14 | 2017-06-22 | 中兴通讯股份有限公司 | Bandwidth scheduling method, onu registration method, device and olt |
-
2009
- 2009-03-31 CN CN200910057012A patent/CN101854563A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 吕春燕, 高仲合, 柳颖: "Epon 系统ONU 自动发现与注册技术的研究", 《电脑知识与技术(学术交流)》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012167577A1 (en) * | 2011-11-29 | 2012-12-13 | 华为技术有限公司 | Method and system for discovering optical network unit |
| WO2014047844A1 (en) * | 2012-09-27 | 2014-04-03 | 华为技术有限公司 | Logical link identifier (llid) registration method, device and system |
| US9210029B2 (en) | 2012-09-27 | 2015-12-08 | Huawei Technologies Co., Ltd. | Logical link identifier registration method, device, and system |
| WO2014094643A1 (en) * | 2012-12-21 | 2014-06-26 | Huawei Technologies Co., Ltd. | Round trip time aware dynamic bandwidth allocation for ethernet passive optical network over coaxial network |
| US9331812B2 (en) | 2012-12-21 | 2016-05-03 | Futurewei Technologies, Inc. | Round trip time aware dynamic bandwidth allocation for ethernet passive optical network over coaxial network |
| WO2017049460A1 (en) * | 2015-09-22 | 2017-03-30 | 华为技术有限公司 | Optical network unit registration method, device and system |
| CN108028972A (en) * | 2015-09-22 | 2018-05-11 | 华为技术有限公司 | The method, apparatus and system of a kind of optical network unit (ONU) registration |
| WO2017101438A1 (en) * | 2015-12-14 | 2017-06-22 | 中兴通讯股份有限公司 | Bandwidth scheduling method, onu registration method, device and olt |
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