CN102802094A - Improvement method used for shortening multicasting traffic stream issued retardation in EPON (ethernet passive optical network) system - Google Patents
Improvement method used for shortening multicasting traffic stream issued retardation in EPON (ethernet passive optical network) system Download PDFInfo
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- CN102802094A CN102802094A CN2012103347804A CN201210334780A CN102802094A CN 102802094 A CN102802094 A CN 102802094A CN 2012103347804 A CN2012103347804 A CN 2012103347804A CN 201210334780 A CN201210334780 A CN 201210334780A CN 102802094 A CN102802094 A CN 102802094A
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Abstract
The invention discloses an improvement method used for shortening multicasting traffic stream issued retardation in an EPON (ethernet passive optical network) system. The improvement method comprises the following steps of: setting OLT (optical line terminal) as a multicast group member, wherein the OLT sends a join request on an upstream multicast server in the status of the multicast group member; configurating a multicasting pre-join group on a multicast router, enabling the OLT to periodically send a join message to the multicast router in the status of the multicasting group member so as to guiding the multicast traffic stream to the OLT in advance; performing a client end PC broadcast request, actively sending the join message to the OLT, and sending a multicast group joint request to the multicasting group; and establishing the corresponding multicasting translation table when the OLT receives the request, and sending the multicasting data stream to the client end PC directly from the OLT through an ONU (optical network unit). The improvement method provided by the invention effectively reduces the message convergency transmissive time, and improves the user taste.
Description
Technical field
The present invention relates to the access technology in the communication network, relate in particular to and shorten group business stream in a kind of EPON system and issue improving one's methods of time-delay.
Background technology
In recent years; Fast development along with information technology; Network application rolls up, and makes original volume of transmitted data that existed, huge be doubled and redoubled, and can satisfy the needs that volume of transmitted data increases and optimize bandwidth; The IP multicasting technology then is an important means of optimizing bandwidth, and it is applicable to that multiple spot is to multiple spot or some data transmission service to multiple spot.
The IP multicasting technology is as the key technology in EPON (ethernet passive optical network) system; Can effectively reduce offered load, conserve network bandwidth; Realized the efficient data transmission of P2MP (putting multiple spot) in the network, general utilization has all been arranged at aspects such as multimedia conferencing, IPTV, long-distance education, real time data transmission.The basic principle of multicasting technology is that multicast source only sends a group business stream, and Business Stream is purpose IP address with the multicast group address, and multicast router duplicates data and sends the terminal use who needs data to, accomplishes forwarding of data work.When the user wants the receiving group source; Need upstream to send to join message; This joins message and can be given upper reaches multicast router by the EPON device forwards; By the time after multicast router is received and is joined request, forwarding multicasting Business Stream downstream, this Business Stream could arrive user side (PC) through OLT (optical line terminal), ONU (optical network unit).Fig. 1 shows traditional multicast pattern on the existing EPON equipment, and is as shown in the figure, at first by the client rs PC program request; Send out the OLT that joins message in the active, OLT intercepts and captures this and joins message, and in OLT, generates simultaneously and transmits; Multicast group generates, and upstream sends out on the multicast server to join message again, and this moment, multicast server just issued multicast traffic stream; Arrive client rs PC behind process OLT, the ONU, so the user can clearly experience significantly time-delay of reception existence of multicast service.
In actual application; The group business stream that multicast source sends will pass ability incoming terminal equipment after complicated network environment (various routers, switch) and the very long distance; Therefore; Begin upstream to send to join request from the user and can produce time-delay during requested Business Stream arrives the user, greatly reduce user experience.
Summary of the invention
The objective of the invention is to propose to shorten in a kind of EPON system group business stream and issue improving one's methods of time-delay,, issue time-delay, reach the effect of promptly promptly broadcasting to shorten Business Stream through in advance group business stream being guided to OLT.
The objective of the invention is to realize through following technical proposals:
Shorten group business stream in a kind of EPON system and issue improving one's methods of time-delay; Said EPON system comprises the OLT of innings side, the ONU and the Optical Distribution Network between OLT and ONU of user side; Also comprise multicast router and multicast server, wherein, comprise the following steps:
To be multicast member: OLT with the identity of multicast member upstream send out on the multicast server setting OLT joins request, and indicates to add multicast group;
A multicast of configuration adding group in advance on OLT, after multicast adding group in advance generated, OLT periodically upward sent out with the identity of multicast member and joins message to multicast router, realizes in advance group business stream being guided to OLT;
The client rs PC program request is sent out in the active and is joined message to OLT, sends the request that adds this multicast group to multicast group;
OLT receives the corresponding multicast forward table of request back establishment, and multicast traffic stream directly is issued to client rs PC from OLT through ONU.
Shorten group business stream in the above-mentioned EPON system and issue improving one's methods of time-delay, wherein, said OLT periodically goes up to send out through the IGMP agreement and joins message to said multicast router.
Shorten group business stream in the above-mentioned EPON system and issue improving one's methods of time-delay, wherein, said OLT goes up periodically that sending out joins message went up at a distance from two minutes once for every to said multicast router.
Shorten group business stream in the above-mentioned EPON system and issue improving one's methods of time-delay, wherein, said Optical Distribution Network mainly is made up of optical branching device, with the distribution of completion optical signal power.
Compared with present technology, beneficial effect of the present invention is:
The present invention has omitted OLT and has transmitted to multicast router and join message and the multicast router issuing service flows to these two processes of OLT, thereby has effectively reduced the time of message interaction transmission, has promoted user experience.
Description of drawings
Fig. 1 be in the prior art on the EPON equipment system of traditional multicast pattern form and flow process is moved towards sketch map;
Fig. 2 is according to specific embodiment of the present invention, shortens in a kind of EPON system that the system that improves one's methods that group business stream issues time-delay forms and flow process is moved towards sketch map;
Fig. 3 is according to specific embodiment of the present invention, shortens the process step sketch map of improving one's methods that group business stream issues time-delay in a kind of EPON system.
Embodiment
Below in conjunction with schematic diagram and concrete operations embodiment the present invention is described further.
Referring to illustrated in fig. 2; Shortening group business stream in a kind of EPON of the present invention system issues in the improving one's methods of time-delay; The EPON system comprises the OLT of innings side, the ONU and the Optical Distribution Network between OLT and ONU of user side, also comprises multicast router and multicast server.OLT is that Optical Access Network provides the interface between network side and other networks and communicates by letter with ONU through one or more ODN; The relation of OLT and ONU is the master-slave communication relation; ODN provides light transmitting means between OLT and the ONU; In the specific embodiment of the invention, ODN mainly is made up of optical branching device, and its major function is to accomplish the distribution of optical signal power.
In the embodiment of the invention, through introduce multicast in advance adding organize this design and come in advance group business stream to be introduced OLT, be equivalent to multicast source is transferred to OLT.In advance the adding group is based on the IGMP agreement, message follow multicast protocol alternately fully.
As shown in Figure 3, simultaneously referring to Fig. 2, embodiment of the invention method comprises the following steps:
To be multicast member: OLT with the identity of multicast member upstream send out on the multicast server setting OLT joins request, and indicates to add multicast group;
A multicast of configuration adding group in advance on OLT, after the adding group generated in advance, OLT periodically upward sent out with the identity of multicast member and joins message to multicast router, realizes in advance group business stream being guided to OLT;
The client rs PC program request is sent out in the active and is joined message to OLT, sends to multicast group to add the multicast group request;
OLT receives the corresponding multicast forward table of request back establishment, and multicast traffic stream directly is issued to client rs PC from OLT through ONU.
Specifically, in advance during the adding group, imaginary OLT is the client rs PC that is used for program request, belongs to multicast member, and this moment, OLT can join request to send out on the identity of multicast member, indicated to add multicast group.After having disposed a preparatory adding group; Multicast adding group in advance generates; OLT periodically (cycle was generally 2 minutes) last sending out joins message to multicast router, and this moment, OLT served as the role of a main frame, and it is responsible for multicast video streams is introduced from multicast router.In case the client rs PC program request should be organized (add and should organize); Client rs PC can go up to send out and join message to OLT, sends to this group to add the multicast group request, after OLT receives; Can create corresponding multicast forward table; OLT carries out the forwarding of video data stream according to this multicast forward table, and the data flow that is pre-stored in advance on the OLT directly is issued to client rs PC behind OLT process optical branching device and ONU, and client rs PC can be watched program immediately.
Adopt the program request of the method for multicasting of the embodiment of the invention more to save time sowing time, promptly saved video flowing and be issued to OLT during this period of time, reach the effect of promptly promptly broadcasting from multicast server than general point.The present invention adds group mode in advance and compares traditional group sowing time; Group business stream among the present invention is in advance down in the OLT equipment of EPON system; The joining message of user is forwarded to OLT from terminal PC ends, and afterwards, group business stream directly is issued to the user from OLT; It has omitted OLT and has transmitted to multicast router and join message and the multicast router issuing service flows to these two processes of OLT, has also promptly reduced the time of message interaction transmission.
Scheme in the embodiment of the invention can be used for the OLT equipment of multiple model EPON, is convenient to enforcement of the present invention.
More than specific embodiment of the present invention is described in detail, but the present invention is not restricted to the specific embodiment of above description, it is just as example.To those skilled in the art, any equivalent modifications and alternative also all among category of the present invention.Therefore, not breaking away from impartial conversion and the modification of having done under the spirit and scope of the present invention, all should contain within the scope of the invention.
Claims (4)
1. shorten group business stream in the EPON system and issue improving one's methods of time-delay; Said EPON system comprises the OLT of innings side, the ONU and the Optical Distribution Network between OLT and ONU of user side; Also comprise multicast router and multicast server, it is characterized in that, comprise the following steps:
To be multicast member: OLT with the identity of multicast member upstream send out on the multicast server setting OLT joins request, and indicates to add multicast group;
A multicast of configuration adding group in advance on OLT, after multicast adding group in advance generated, OLT periodically upward sent out with the identity of multicast member and joins message to multicast router, realizes in advance group business stream being guided to OLT;
The client rs PC program request is sent out in the active and is joined message to OLT, sends to multicast group to add the multicast group request;
OLT receives the corresponding multicast forward table of request back establishment, and multicast traffic stream directly is issued to client rs PC from OLT through ONU.
2. issue improving one's methods of time-delay according to shortening group business stream in the said EPON of claim 1 system, it is characterized in that, said OLT periodically goes up to send out through the IGMP agreement and joins message to said multicast router.
3. issue improving one's methods of time-delay according to shortening group business stream in the said EPON of claim 2 system, it is characterized in that, said OLT periodically goes up to send out and joins message to said multicast router to whenever upward sending out once at a distance from two minutes.
4. issue improving one's methods of time-delay according to shortening group business stream in the said EPON of claim 3 system, it is characterized in that said Optical Distribution Network mainly is made up of optical branching device, to accomplish the distribution of optical signal power.
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| CN103200470A (en) * | 2013-04-07 | 2013-07-10 | 潍坊学院 | Issuing device and method of Gb passive optical network system multicasting service |
| CN103269318A (en) * | 2013-04-18 | 2013-08-28 | 广西广播电视信息网络股份有限公司 | IP (Internet Protocol) multicasting signal method of OTN (Optical Transport Network) broadcast |
| CN103269275A (en) * | 2013-04-18 | 2013-08-28 | 广西广播电视信息网络股份有限公司 | Method for broadcasting IP multicast signal by using optical splitter |
| CN104853259A (en) * | 2015-06-03 | 2015-08-19 | 上海斐讯数据通信技术有限公司 | Method and system for processing message based on IGMP (Internet Group Management Protocol) |
| WO2018001063A1 (en) * | 2016-06-30 | 2018-01-04 | 中兴通讯股份有限公司 | Method, device and system for transmitting file |
| CN112770198A (en) * | 2021-01-05 | 2021-05-07 | 烽火通信科技股份有限公司 | Channel access method, device, equipment and storage medium for cross-OLT slicing |
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| CN103200470A (en) * | 2013-04-07 | 2013-07-10 | 潍坊学院 | Issuing device and method of Gb passive optical network system multicasting service |
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| CN104853259B (en) * | 2015-06-03 | 2017-10-13 | 上海斐讯数据通信技术有限公司 | A kind of message processing method and system based on IGMP |
| WO2018001063A1 (en) * | 2016-06-30 | 2018-01-04 | 中兴通讯股份有限公司 | Method, device and system for transmitting file |
| CN107566321A (en) * | 2016-06-30 | 2018-01-09 | 南京中兴新软件有限责任公司 | The sending method of file, apparatus and system |
| CN107566321B (en) * | 2016-06-30 | 2021-06-15 | 中兴通讯股份有限公司 | File sending method, device and system |
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| CN112770198B (en) * | 2021-01-05 | 2022-05-20 | 烽火通信科技股份有限公司 | Channel access method, device, equipment and storage medium for cross-OLT slicing |
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Application publication date: 20121128 |