CN102739443B - OLT (optical line terminal) communication module in PON (passive optical network) system and OLT communication implementation method - Google Patents
OLT (optical line terminal) communication module in PON (passive optical network) system and OLT communication implementation method Download PDFInfo
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Abstract
The invention provides an OLT (optical line terminal) communication module in a PON (passive optical network) system and an OLT communication implementation method. A configuration management submodule is responsible for maintaining the corresponding relationship between a mark and an Internet protocol (IP) of an opposite terminal OLT configured by a user; a main task package transceiving module comprises a package transmitting cache and a package receiving cache which are respectively connected with a package transmitting interface and a package receiving interface; the package transmitting interface and the package receiving interface respectively communicate with other OLTs through a package transmitting socket and a package receiving socket; a watchdog timer is used for transmitting heartbeat package requests to the main task package transceiving module at regular time through a channel and informing the main task package transceiving module of transmitting heartbeat packages; and a judging timer used for judging whether responses of the opposite terminal OLT are received or not after the heartbeat packages are sent. By adopting the OLT communication module and the OLT communication implementation method, real-time communication channels can be established among the OLTs; and due to the establishment of the channels, the configuration of a master disc and a spare disc is synchronized and the usability of the PON equipment is improved.
Description
Technical field
The present invention relates to PON (Passive Optical Network, passive optical-fiber network) connecting system field, specifically be Realization Method of Communication between (Optical Line Terminal, the optical line terminal) communication module of OLT in a kind of PON system and OLT.
Background technology
Main-apparatus protection is that OLT device provides service reliability aspect important technological means always, and in main-apparatus protection, of paramount importance sport technique segment is exactly, and namely the configuration information in real-time synchronization master wanted by standby dish.
At present; engineering there is the application scenarios of the PON protection between a kind of OLT; namely a spare OLT can protect other OLT of multiple stage simultaneously; the more traditional protected mode of this application adds the mechanism that some configuration synchronization communicate with active and standby OLT; therefore require the passage set up between two OLT for OLT communication, realize the synchronous of the PON relaying configuration between OLT.The realization of configuration synchronization function needs a set of perfect host-standby communication mechanism of design and communication protocol.But traditional main-apparatus protection, all carries out between the inner master and backup discs of same one end OLT; this communication port is based upon between the master and backup discs in same one end OLT; the end points setting up communication is relatively single, has significant limitation, therefore can not meet the configuration interactive between above-mentioned two OLT.In addition, along with a large amount of engineer applied of PON equipment and the diversity of application scenarios, this simple and single communication port can not meet the demand of engineer applied, significantly limit the business development of PON equipment.
Summary of the invention
For the defect existed in prior art, to the object of the present invention is to provide in a kind of PON system Realization Method of Communication between OLT communication module and OLT, give out a contract for a project buffer memory and packet receiving buffer memory is set up in OLT communication module, can for the passage setting up real time communication between any OLT, the foundation of this passage makes the configuration synchronization of master and backup discs, improves the availability of PON equipment.
For reaching above object, the invention provides OLT communication module in a kind of PON connecting system, comprising: configuration management submodule, for the opposite end mark of maintenance customer's configuration and the corresponding relation of IP; Main task transmitting-receiving bag module, for giving out a contract for a project and packet receiving, comprise give out a contract for a project buffer memory and packet receiving buffer memory, the two is connected with packet receiving interface with interface of giving out a contract for a project respectively; WatchDog Timer, by the request of pipeline timed sending heartbeat packet to main task transmitting-receiving bag module; Sentence dead timer, after judging that heartbeat packet sends, whether receive opposite end and respond.
On the basis of technique scheme, described in interface of giving out a contract for a project communicate with other OLT with packet receiving socket respectively by socket of giving out a contract for a project with packet receiving interface.
The present invention also provides Realization Method of Communication between a kind of OLT based on described OLT communication module, S1. to configuration management submodule configuration management IP, packet receiving socket is set up and socket of giving out a contract for a project in configuration management submodule, create the pipeline that is carried out receiving and dispatching the communication of bag main task simultaneously, initialization is given out a contract for a project buffer memory and packet receiving buffer memory, open WatchDog Timer, timing sends heartbeat packet request by pipeline; S2., after WatchDog Timer sends and asked for three times, the state sentencing all opposite end OLT of dead timer poll is started; Meanwhile, the judgement of configuration management submodule is packet receiving or gives out a contract for a project, if packet receiving, is then online by opposite end OLT status modifier, bag is collected packet receiving buffer memory, after processing, enters next circulation according to packet receiving type; If give out a contract for a project, give out a contract for a project to the opposite end OLT of corresponding IP according to difference type of giving out a contract for a project, after release sends space, enter next circulation.
On the basis of technique scheme, in described S1, user is by Element management system or Command Line Interface, and configuration needs the managing I P carrying out the OLT communicated to configuration management submodule.
On the basis of technique scheme, in described S1, be tied to by packet receiving socket on described managing I P and User Datagram Protoco (UDP) port, described pipeline is used for upper level applications and sees that doorway timer communicates with the transmitting-receiving bag main task of this OLT communication module respectively.
On the basis of technique scheme, the fixed time interval that described WatchDog Timer adopts regulates according to equipment and application scenarios.
On the basis of technique scheme, described WatchDog Timer sent three heartbeat packet requests every 30 seconds continuously by pipeline, and notice main task sends heartbeat packet, was detection state by opposite end OLT status modifier simultaneously, after having asked for three times, start and sentence dead timer.
On the basis of technique scheme, the described state sentencing dead timer all opposite end OLT of poll after 5 seconds, if state is not online, represents the heartbeat respond packet not receiving opposite end OLT, then by opposite end OLT status modifier for going offline, simultaneously to Element management system report and alarm.
On the basis of technique scheme, in described S2, if packet receiving, if receive for communications packet, then the process Hook Function registered at configuration management submodule before finding according to the type of this bag, processes one by one; If what receive is heartbeat packet, the IP of opposite end OLT is written in this heartbeat packet, calls the good heartbeat response function process of registered in advance simultaneously and send heartbeat respond packet; If what receive is heartbeat respond packet, is online by opposite end OLT status modifier.
On the basis of technique scheme, in described S2, if give out a contract for a project, if transmission is communications packet, finding the IP address of opposite end OLT, by sending socket, communications packet being sent to corresponding opposite end OLT; If what send is heartbeat packet, according to pre-designed format organization's heartbeat packet, searches the IP of all opposite end OLT recorded in configuration management submodule simultaneously, heartbeat is sent to the opposite end OLT of all records; If transmission is heartbeat respond packet, according to the IP receiving opposite end OLT transmission heartbeat packet, send heartbeat respond packet to opposite end OLT.
Beneficial effect of the present invention is: Realization Method of Communication between OLT communication module and OLT in a kind of PON system of the present invention, set up based on UDP (User DataGram Protocol by network management IP between different OLT, User Datagram Protoco (UDP)) the socket socket of agreement provides passage, realizes configuration synchronization between different OLT.
Accompanying drawing explanation
Fig. 1 is the general frame of OLT communication module in embodiment of the present invention PON system;
Fig. 2 is embodiment of the present invention OLT communication module initialization flowchart;
Fig. 3 is embodiment of the present invention main task transmitting-receiving bag flow chart;
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As shown in Figure 1, OLT communication module in PON system of the present invention, it comprises configuration management submodule, main task transmitting-receiving bag module, WatchDog Timer and sentences dead timer, wherein configuration management submodule is responsible for the opposite end OLT mark of maintenance customer's configuration and the corresponding relation of IP, inquires about when giving out a contract for a project for main task transmitting-receiving bag module.Main task transmitting-receiving bag module comprises give out a contract for a project buffer memory and packet receiving buffer memory, give out a contract for a project buffer memory for depositing bag to be sent, packet receiving buffer memory is for depositing the bag received, the two is connected with packet receiving interface with interface of giving out a contract for a project respectively, interface of giving out a contract for a project refers to interface function of giving out a contract for a project, this function reads bag to be sent from buffer memory of giving out a contract for a project, and calls sendto function simultaneously, by the socket that gives out a contract for a project (socket), bag is sent to corresponding opposite end.Described packet receiving interface refers to packet receiving interface function, and this function call recvfrom collects by packet receiving socket bag that opposite end sends over and inserts packet receiving buffer memory.Described interface of giving out a contract for a project communicates with other OLT with packet receiving socket respectively by the socket that gives out a contract for a project with packet receiving interface.Described WatchDog Timer and main task are received and dispatched between bag module has pipeline, and WatchDog Timer is by the request of pipeline timed sending heartbeat packet to main task transmitting-receiving bag module, and notice main task transmitting-receiving bag module sends heartbeat packet.Describedly sentence dead timer, after judging that heartbeat packet sends, whether receive opposite end OLT and respond.
Realization Method of Communication between the OLT that the present invention is based on OLT communication module in PON system, it comprises the steps:
S1. to configuration management submodule configuration management IP, packet receiving socket is set up and socket of giving out a contract for a project in configuration management submodule, create the pipeline that is carried out receiving and dispatching the communication of bag main task simultaneously, open up give out a contract for a project buffer memory and packet receiving buffer memory, open WatchDog Timer, timing sends heartbeat packet request by pipeline, and this process is OLT communication module initialization procedure.
As shown in Figure 2, be embodiment of the present invention OLT communication module initialization flowchart, its concrete steps are:
S11. user needs the managing I P carrying out the OLT communicated to configuration management submodule by EMS (Element Manage System, Element management system) or CLI (Command Line Interface, Command Line Interface) configuration.Configuration management submodule is responsible for IP and the corresponding table of opposite end OLT mark that maintenance customer configures opposite end OLT, and described correspondence shows the corresponding relation of the IP of mainly reflection opposite end OLT and opposite end OLT, for task of giving out a contract for a project afterwards provides retrieval foundation.
S12. on local terminal OLT main control unit, two are set up based on UDP (User DataGram Protocol, User Datagram Protoco (UDP)) socket, be respectively used to packet receiving and give out a contract for a project, namely set up packet receiving socket and to give out a contract for a project socket, and on the managing I P that packet receiving socket is tied to oneself and pre-designed udp port.Simultaneously create one for upper level applications with see the pipeline that doorway timer carries out communicating with the transmitting-receiving bag main task of this OLT communication module respectively.
S13. in configuration management submodule, initialization is given out a contract for a project buffer memory and packet receiving buffer memory.
S14. the transmitting-receiving bag main task of configuration management submodule is started.
S15. WatchDog Timer is started, timing sends heartbeat packet request notice main task by pipeline and sends heartbeat packet, the fixed time interval that described WatchDog Timer adopts regulates according to concrete equipment and application scenarios, and in the present embodiment, the fixed time interval of employing is 30 seconds.
S2., after WatchDog Timer sends and asked for three times, the state sentencing all opposite end OLT of dead timer poll is started.In the present embodiment, WatchDog Timer sent a heartbeat packet request by pipeline every 30 seconds, continuous asked for three times after, start sentence dead timer, this timer after 5 seconds, poll all opposite ends OLT state, if the state of opposite end OLT is not online (online), representing and do not receive the heartbeat respond packet of opposite end OLT, is then offline (going offline) by opposite end OLT status modifier, simultaneously to EMS report and alarm.
Meanwhile, the judgement of configuration management submodule is packet receiving or gives out a contract for a project, if packet receiving, is then online by opposite end OLT status modifier, bag is collected packet receiving buffer memory, after processing, enters next circulation according to packet receiving type; If give out a contract for a project, give out a contract for a project to the opposite end OLT of corresponding IP according to difference type of giving out a contract for a project, after release sends space, enter next circulation.
As shown in Figure 3, be embodiment of the present invention main task transmitting-receiving bag flow chart, its step is as follows for idiographic flow:
S200. the transmitting-receiving bag main task of configuration management submodule is operated by select, poll packet receiving socket and pipeline, if judge that packet receiving socket has the bag from Correspondent Node OLT, i.e. packet receiving, enters S210; If judge there is request of giving out a contract for a project, namely give out a contract for a project, enter S220.
S210. be online by opposite end OLT status modifier, call recvfrom function simultaneously, bag is collected in packet receiving buffer memory.
S211. process according to Packet type, if receive for communications packet, enter S212; If what receive is heartbeat packet, enter S213; If what receive is heartbeat respond packet, enter S214.
S212. the process Hook Function registered at configuration management submodule before finding according to the type of this communications packet, process one by one, the buffering area releasing memory space processed, enters S215.
S213. the IP of opposite end OLT is written in this heartbeat packet, this is done to the IP that can determine opposite end OLT when sending heartbeat respond packet, call the good heartbeat response function process of registered in advance and the IP specified in heartbeat packet transmission heartbeat respond packet simultaneously, enter S215.
S214. owing to being online by opposite end OLT status modifier, then do not do other process herein, enter S215.
S215. enter next circulation, return beginning.
S220. travel through buffer memory of giving out a contract for a project, judge to give out a contract for a project type, if transmission is communications packet, enter S221; If what send is heartbeat packet, enter S222; If what send is heartbeat respond packet, enter S223.
S221. read opposite end OLT in this communications packet to identify, identify and IP correspondence table by searching the opposite end OLT safeguarded in configuration management submodule, find the IP address of opposite end OLT, call sendto function, by sending socket, communications packet is sent to corresponding opposite end OLT, release sends space, enters S215.
S222. heartbeat packet request herein, derive from the heartbeat request message of above-mentioned WatchDog Timer timed sending, according to pre-designed format organization's heartbeat packet, (heartbeat packet only has Packet type, there is no payload), search the IP of all opposite end OLT recorded in configuration management submodule simultaneously, heartbeat is sent to the opposite end OLT of all records, release sends space, enters S215.
S223. according to the IP receiving opposite end OLT transmission heartbeat packet, send heartbeat respond packet to opposite end OLT, release sends space, enters S215.
The present invention is not limited to above-mentioned execution mode, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as within protection scope of the present invention.The content be not described in detail in this specification belongs to the known prior art of professional and technical personnel in the field.
Claims (10)
1. an OLT communication module in PON connecting system, is characterized in that, comprising:
Configuration management submodule, is packet receiving for the opposite end mark of maintenance customer's configuration and the corresponding relation of IP and judgement or gives out a contract for a project;
Main task transmitting-receiving bag module, for giving out a contract for a project and packet receiving, comprise give out a contract for a project buffer memory and packet receiving buffer memory, the two is connected with packet receiving interface with interface of giving out a contract for a project respectively;
WatchDog Timer, by the request of pipeline timed sending heartbeat packet to main task transmitting-receiving bag module, and the fixed time interval adopted regulates according to concrete equipment and application scenarios;
Sentence dead timer, after judging that heartbeat packet sends, whether receive opposite end to respond, by the opposite end OLT state that poll is all, if the state of opposite end OLT is not online, represent and do not receive the heartbeat respond packet of opposite end OLT, then by opposite end OLT status modifier for going offline, simultaneously to Element management system report and alarm.
2. OLT communication module in PON connecting system as claimed in claim 1, is characterized in that: described in interface of giving out a contract for a project communicate with other OLT with packet receiving socket respectively by socket of giving out a contract for a project with packet receiving interface.
3. based on OLT communication module in claim 1 OLT between a Realization Method of Communication, it is characterized in that, comprise step:
S1. to configuration management submodule configuration management IP, packet receiving socket is set up and socket of giving out a contract for a project in configuration management submodule, create the pipeline that is carried out receiving and dispatching the communication of bag main task simultaneously, initialization is given out a contract for a project buffer memory and packet receiving buffer memory, open WatchDog Timer, timing sends heartbeat packet request by pipeline;
S2., after WatchDog Timer sends and asked for three times, the state sentencing all opposite end OLT of dead timer poll is started;
Meanwhile, the judgement of configuration management submodule is packet receiving or gives out a contract for a project, if packet receiving, is then online by opposite end OLT status modifier, bag is collected packet receiving buffer memory, after processing, enters next circulation according to packet receiving type; If give out a contract for a project, give out a contract for a project to the opposite end OLT of corresponding IP according to difference type of giving out a contract for a project, after release sends space, enter next circulation.
4. Realization Method of Communication between OLT as claimed in claim 3, is characterized in that: in described S1, and user is by Element management system or Command Line Interface, and configuration needs the managing I P carrying out the OLT communicated to configuration management submodule.
5. Realization Method of Communication between OLT as claimed in claim 3, it is characterized in that: in described S1, be tied to by packet receiving socket on described managing I P and User Datagram Protoco (UDP) port, described pipeline is used for upper level applications and sees that doorway timer communicates with the transmitting-receiving bag main task of this OLT communication module respectively.
6. Realization Method of Communication between OLT as claimed in claim 3, is characterized in that: the fixed time interval that described WatchDog Timer adopts regulates according to equipment and application scenarios.
7. Realization Method of Communication between OLT as claimed in claim 6, it is characterized in that: described WatchDog Timer sent three heartbeat packet requests every 30 seconds continuously by pipeline, notice main task transmitting-receiving bag module sends heartbeat packet, it is detection state by opposite end OLT status modifier simultaneously, after having asked for three times, start and sentence dead timer.
8. Realization Method of Communication between OLT as claimed in claim 7, it is characterized in that: described in sentence the state of dead timer all opposite end OLT of poll after 5 seconds, if state is not online, represent the heartbeat respond packet not receiving opposite end OLT, then by opposite end OLT status modifier for going offline, simultaneously to Element management system report and alarm.
9. Realization Method of Communication between OLT as claimed in claim 3, it is characterized in that: in described S2, if packet receiving, if receive for communications packet, the process Hook Function registered at configuration management submodule before then finding according to the type of this communications packet, processes one by one; If what receive is heartbeat packet, the IP of opposite end OLT is written in this heartbeat packet, calls the good heartbeat response function process of registered in advance simultaneously and send heartbeat respond packet; If what receive is heartbeat respond packet, is online by opposite end OLT status modifier.
10. Realization Method of Communication between OLT as claimed in claim 3, is characterized in that: in described S2, if give out a contract for a project, if transmission is communications packet, finds the IP address of opposite end OLT, by sending socket, communications packet is sent to corresponding opposite end OLT; If what send is heartbeat packet, according to pre-designed format organization's heartbeat packet, searches the IP of all opposite end OLT recorded in configuration management submodule simultaneously, heartbeat packet is sent to the opposite end OLT of all records; If transmission is heartbeat respond packet, according to the IP receiving opposite end OLT transmission heartbeat packet, send heartbeat respond packet to opposite end OLT.
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| CN105007187B (en) * | 2015-07-23 | 2018-07-24 | 上海斐讯数据通信技术有限公司 | A kind of distribution OLT system command line management method |
| CN108737159B (en) * | 2018-04-13 | 2021-05-14 | 烽火通信科技股份有限公司 | Method and system for processing configuration information in optical transport network and optical transport network |
| CN111586040B (en) * | 2020-05-06 | 2021-02-09 | 北京中科海讯数字科技股份有限公司 | High-performance network data receiving method and system |
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| CN101150367A (en) * | 2007-11-08 | 2008-03-26 | 杭州华三通信技术有限公司 | Backup method and device for passive optical network OLT equipment |
| CN101466052A (en) * | 2007-12-21 | 2009-06-24 | 日立通讯技术株式会社 | Network system, optical network unit and optical line terminal |
| US7646722B1 (en) * | 1999-06-29 | 2010-01-12 | Cisco Technology, Inc. | Generation of synchronous transport signal data used for network protection operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7646722B1 (en) * | 1999-06-29 | 2010-01-12 | Cisco Technology, Inc. | Generation of synchronous transport signal data used for network protection operation |
| CN101150367A (en) * | 2007-11-08 | 2008-03-26 | 杭州华三通信技术有限公司 | Backup method and device for passive optical network OLT equipment |
| CN101466052A (en) * | 2007-12-21 | 2009-06-24 | 日立通讯技术株式会社 | Network system, optical network unit and optical line terminal |
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