CN104065493A - Multicast switching protection method, device and system - Google Patents
Multicast switching protection method, device and system Download PDFInfo
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- CN104065493A CN104065493A CN201310088567.4A CN201310088567A CN104065493A CN 104065493 A CN104065493 A CN 104065493A CN 201310088567 A CN201310088567 A CN 201310088567A CN 104065493 A CN104065493 A CN 104065493A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/64—Hybrid switching systems
- H04L12/6418—Hybrid transport
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Abstract
The invention provides a multicast switching protection method, device and system, and relates to the field of optical networks. The multicast switching protection method comprises that an ONU optical network distribution unit sends an adding packet to an IP network control end via a main use OLT optical line terminal; the ONU receives multicast protocol data responding the adding packet from the IP network control end via the main use OLT; and the ONU sends the multicast protocol data to the OLT. In the invention, the ONU sends the multicast protocol data to a standby OLT. In the subsequent process, a multicast service can be rapidly switched to the standby OLT under the situation of abnormity of the main use OLT.
Description
Technical field
The present invention relates to field of optical networks, refer to especially a kind of method of protecting multicast to switch, device and system.
Background technology
XPON(a new generation optical fiber access technology) be the passive optical network technique in the emerging high broadband of support.In reality, increasing application is all that the application of these particular demographic comprises multimedia conferencing, video request program etc. based on a particular demographic.In this case, if clean culture, the broadcast technology before using all do not meet practical situations, they can increase the data traffic of network redundancy greatly.Best mode is exactly, according to actual conditions, the member of application is divided into Yi Ge group the inside, and the distribution of data only limits to group inside, so just can realize group application with the least possible data flow.Multicasting technology is a kind of network service of the corresponding a plurality of recipients of single sender, in multicasting technology, by transmitting the mode of single information flow to a plurality of recipients, can reducing, there are a plurality of recipients and listen to simultaneously or check the network traffic under same asset.Like this, realize point-to-multipoint efficient data and transmitted, can save in a large number the network bandwidth, reduce offered load, some new value-added services can be provided easily, comprised the information services such as live, Web TV, long-distance education, tele-medicine online.
Fig. 1 is in actual existing network application, the flow process of multicast service and the realization explanation of protecting networking across the Type B of OLT.Working hole is OLT(optical line terminal, optical line terminal) certain PON(Passive Optical Network of 1, passive optical-fiber network) mouthful 1, protection mouthful is certain the PON mouth 2 above OLT2.These two network elements of OLT1 and OLT2 are completely independently for the processing of multicast.In Fig. 1, represent ONU STB program request multicast, sent IGMP multicast and added bag request, by ONU, ODN etc., deliver to network element OLT1; After by multicast resume module, deliver to network side, on-demand multicasting data flow, by solid arrow, multicast traffic stream is sent to OLT1, be then forwarded to PON mouth, notify all ONU, and be forwarded to STB from the ONU of this program request, so just can normally watch multicast.
Before switching, whole multicast traffic stream gets off by OLT1, when OLT1 produces extremely, owing to having configured protection, so can be switched to OLT2.But, after switching, because adding bag accordingly, OLT2 do not add, so just do not have corresponding multicast data flow to send to ONU by network element OLT2, now, multicast service is certain to interrupt.In this case, only have ONU to resend and add bag, multicast traffic stream can send to OLT2, and multicast service can recover.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method of protecting multicast to switch, device and system; ONU sends to spare OLT by multicast protocol data; in subsequent process, can, in the situation that primary OLT occurs extremely, multicast service be switched to standby OLT rapidly.
For solving the problems of the technologies described above, embodiments of the invention provide technical scheme as follows:
On the one hand, provide a kind of method of protecting multicast to switch, comprising:
ONU optical-fiber network allocation units are sent and add bag to IP network control end by primary OLT optical line terminal;
Described ONU is by described primary OLT, from adding the multicast protocol data of bag described in described IP network control end reception response;
Described ONU sends to spare OLT by described multicast protocol data.
The method that described protection multicast is switched, also comprises:
Described IP network control end is monitored the operating state of primary OLT;
When the operating state of described primary OLT is when having fault, described IP network control end starts the PON mouth of spare OLT;
Described IP network control end, by the PON mouth of described spare OLT, sends multicast traffic stream according to described multicast protocol data to ONU.
The method that described protection multicast is switched, is characterized in that, also comprises:
Described ONU sends to Set Top Box by described multicast traffic stream.
Described ONU sends to the step of spare OLT to be specially described multicast protocol data:
Described ONU extracts address information from described multicast protocol data, and described address information is sent to spare OLT, makes described spare OLT according to described address information, and reduction generates described multicast protocol data.
Described address information is carried the ID of source PON mouth, object PON mouth and GEM multicast group.
On the other hand, provide a kind of device of protecting multicast to switch, comprising:
The first transmitting element, is sent and adds bag to IP network control end by primary OLT optical line terminal;
Receiving element, from adding the multicast protocol data of bag described in described IP network control end reception response;
The second transmitting element, sends to spare OLT by described multicast protocol data.
Described the second transmitting element comprises:
Extract subelement, from described multicast protocol data, extract address information;
Send subelement, described address information is sent to spare OLT, make described spare OLT according to described address information, reduction generates described multicast protocol data.
On the other hand, provide a kind of device of protecting multicast to switch, comprising:
Monitoring means, monitors the operating state of primary OLT;
Start unit, when the operating state of described primary OLT is when having fault, starts the PON mouth of spare OLT;
Transmitting element, by the PON mouth of described spare OLT, sends multicast traffic stream according to described multicast protocol data to ONU.
On the other hand, provide a kind of system of protecting multicast to switch, comprising: IP network control end, primary OLT, spare OLT, ONU;
Described ONU is used for, and by primary OLT optical line terminal, to IP network control end, is sent and adds bag; By described primary OLT, from adding the multicast protocol data of bag described in described IP network control end reception response; Described multicast protocol data are sent to spare OLT.
Described IP network control end is used for, and monitors the operating state of primary OLT; When the operating state of described primary OLT is when having fault, start the PON mouth of spare OLT; By the PON mouth of described spare OLT, according to described multicast protocol data, to ONU, send multicast traffic stream.
Embodiments of the invention have following beneficial effect:
In such scheme, ONU sends to spare OLT by multicast protocol data, in subsequent process, in the situation that primary OLT occurs is abnormal, multicast service can be switched to standby OLT rapidly, make user have smooth viewing effect, thereby be unlikely to make the video breaks of watching to wait for the long time.
Accompanying drawing explanation
Fig. 1 is the basic operational process of multicast service in prior art and the schematic diagram of protecting networking across the Type B of OLT;
Fig. 2 is a kind of schematic flow sheet of protecting an embodiment of the method that multicast switches of the present invention;
Fig. 3 is a kind of schematic flow sheet of protecting another embodiment of the method that multicast switches of the present invention;
Fig. 4 is for adopting this method to realize the schematic diagram of the application scenarios of switching fast;
Fig. 5 is the structural representation of an embodiment of the device switched of protection multicast of the present invention;
Fig. 6 is the structural representation of another embodiment of the device switched of protection multicast of the present invention;
Fig. 7 is the structural representation of the protection multicast of the present invention system of switching.
Embodiment
For technical problem, technical scheme and advantage that embodiments of the invention will be solved are clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
Fig. 2 is an a kind of embodiment who protects the method that multicast switches of the present invention, comprising:
Step 11, ONU optical-fiber network allocation units are sent and add bag to IP network control end by primary OLT optical line terminal; This step is specially: Set Top Box sends IP Information On Demand to described primary OLT, and described ONU is sent and adds bag to described primary OLT by splitter, and described primary OLT sends and adds bag to described IP network control end.
Step 12, described ONU is by described primary OLT, from adding the multicast protocol data of bag described in described IP network control end reception response; This step is specially: described IP network control end, to the multicast protocol data that add bag described in described primary OLT transmission response, adds the multicast protocol data of bag described in described primary OLT responds to described ONU transmission by splitter.
Step 13, described ONU sends to spare OLT by described multicast protocol data.This step is specially: described ONU sends to spare OLT by splitter by described multicast protocol data.
Step 14, IP network control end is monitored the operating state of primary OLT optical line terminal;
Step 15, when the operating state of described primary OLT is when having fault, IP network control end starts the PON mouth of spare OLT;
Step 16, described IP network control end, by the PON mouth of described spare OLT, sends multicast traffic stream to ONU optical-fiber network allocation units.This step is specially: described IP network control end sends multicast traffic stream by splitter to described spare OLT, makes described spare OLT by described PON mouth, to ONU, send described multicast traffic stream according to multicast protocol data.Described multicast protocol data are carried address information, and described address information is carried the ID of source PON mouth, object PON mouth and GEM multicast group.
Step 17, described ONU sends to Set Top Box by described multicast traffic stream.
Fig. 3 is a kind of another embodiment that protects the method that multicast switches of the present invention, comprising:
Step 21, ONU optical-fiber network allocation units are sent and add bag to IP network control end by primary OLT optical line terminal; This step is specially: Set Top Box sends IP Information On Demand to described primary OLT, and described ONU is sent and adds bag to described primary OLT by splitter, and described primary OLT sends and adds bag to described IP network control end.
Step 22, described ONU is by described primary OLT, and from adding the multicast protocol data of bag described in described IP network control end reception response, described multicast protocol data are carried address information; Described address information is carried the ID of source PON mouth, object PON mouth and GEM multicast group.
Step 23, described ONU extracts described address information from multicast protocol data, and described address information is sent to described spare OLT, makes described spare OLT according to described address information, and reduction generates described multicast protocol data; In this step, will add the information in bag to refine, extract key message and carry out simultaneous operation, rather than whole message is carried out synchronously, having reduced data volume and the lock in time of synchrodata; After synchronization message arrives the PON mouth of spare OLT, synchronizing information is directly reverted to IGMP protocol massages.
Step 24, IP network control end is monitored the operating state of primary OLT optical line terminal;
Step 25, when the operating state of described primary OLT is when having fault, IP network control end starts the PON mouth of spare OLT;
Step 26, described IP network control end, by the PON mouth of described spare OLT, sends multicast traffic stream to ONU optical-fiber network allocation units.This step is specially: described IP network control end sends multicast traffic stream to described spare OLT, makes described spare OLT by described PON mouth, to ONU, send described multicast traffic stream according to multicast protocol data.
Step 27, described ONU sends to Set Top Box by described multicast traffic stream.
Application scenarios of the present invention is below described.As shown in Figure 4, a kind of method of switching fast across OLT protection multicast that realizes, the method that employing is carried out transfer by ONU realizes the dynamic synchronization of multicast packet, that is to say, when primary OLT1 normally works, in protection mouthful, upwards send and add bag, on the spare OLT 2 at protection mouthful place, multicast data flow is added, in advance multicast traffic stream is sent to protection mouthful, and in advance always toward the PON mouth forwarding data of OLT2, the PON mouth of standby OLT2 is closed, and therefore standby OLT2 can not be forwarded to ONU by multicast data flow; When primary OLT1 is during due to abnormal disconnection, be switched to standby OLT2, the PON mouth of standby OLT2 is opened, and the ONU in protection mouthful can receive multicast traffic stream fast, and then multicast service is not interrupted, and realizes quick protective switch.Specifically comprise the following steps:
The first step: multicast service normally arrives user by OLT1;
Second step: in order to reduce synchronous data volume, ONU extracts key message (being mainly address information) from add bag, to carry out simultaneous operation.
The 3rd step: ONU carries out data relay, namely by path shown in dotted lines in Figure 4, multicast protocol data is carried out synchronously, makes OLT1 and OLT2 in protection group can both receive synchronizing information.After synchronization message arrives the PON mouth of spare OLT 2, OLT2 reverts to IGMP protocol massages by synchronizing information.Can adopt the mode of OMCI to carry out synchronously, which support hardware is realized, and the data volume which once transmits is many, meets synchronous requirement.In this step, do not need whole message to carry out simultaneous operation, reduced complexity and the lock in time of synchrodata.
The 4th step: after switching, because standby mouth has multicast traffic stream, by OLT2, multicast data flow is sent to ONU, and then reach the object of the fast quick-recovery of business.
Adopt the method to realize across OLT protection multicast and switch fast, be not limited to network, do not have synchronous limited problem, do not rely on upper layer network, only at ONU, go wrong or optical fiber link occurs when abnormal that ONU can not carry out synchronously; Multicast is under normal circumstances processed and can not exerted an influence, and bottom only provides the passage of transparent transmission, by OMCC(ONT, manages and control channel) passage is mutual; And each ONU adopts OMCC passage separately synchronously to process, and can not exert an influence each other.
The multicast of below describing this method is switched the Another Application scene of flow process fast.In this application scene, when watching multicast service, at primary OLT1, occur under abnormal conditions, multicast service is issued to user by OLT2 fast.Concrete methods of realizing is as follows:
Steps A, line card receive IGMP(Internet Group Management Protocol, Internet igmpinternet) protocol massages;
After the multicast resume module of step B, OLT1, be forwarded to the main control module of OLT1, arrange the bottom layer driving module that is issued to OLT1 after refining simultaneously;
The bottom layer driving module of step C, OLT1 encapsulates after receiving, then by OMCC passage, is issued to ONU;
Step D, ONU do not carry out data processing after receiving this message, send to respectively OLT1 and OLT2 in protection group;
After step e, working hole OLT1 receive this response, for confirming that ONU forwards; Represent that spare OLT 2 received data synchronization information simultaneously; Otherwise after certain hour, the bottom layer driving module of OLT1 need to re-start transmission;
Step F, in OLT2 side, monitor this OMCI message, after receiving message, carry out message extraction, according to the form of the multicast module agreement with OLT2, report the multicast protocol module of OLT2;
The multicast module of step G, OLT2 is carried out Message Processing after receiving synchrodata message, is forwarded to the main control module of OLT2, upwards sends and adds or leave message, notifies other modules to process accordingly;
Step H, OLT2 are according to the vlan query protocol VLAN message of the data respective handling upper layer network after synchronous;
Step I, consider the robustness of system, in the time of for the message real-time synchronization of ONU, carry out periodically synchronous;
Step J, after ONU goes offline, cannot carry out data synchronous, now the bottom layer driving of OLT2 is obtained ONU in off-line state, the multicast service under this ONU of multicast module of notice OLT2 needs all to disconnect.
As shown in Figure 5, be a kind of device of protecting multicast to switch of the present invention, comprising:
The first transmitting element 51, is sent and adds bag to IP network control end by primary OLT optical line terminal;
Receiving element 52, from adding the multicast protocol data of bag described in described IP network control end reception response;
The second transmitting element 53, sends to spare OLT by described multicast protocol data.
Described the second transmitting element comprises:
Extract subelement, from described multicast protocol data, extract address information;
Send subelement, described address information is sent to spare OLT, make described spare OLT according to described address information, reduction generates described multicast protocol data.
As shown in Figure 6, be a kind of device of protecting multicast to switch of the present invention, comprising:
Monitoring means 61, monitors the operating state of primary OLT;
Start unit 62, when the operating state of described primary OLT is when having fault, starts the PON mouth of spare OLT;
Transmitting element 63, by the PON mouth of described spare OLT, sends multicast traffic stream according to described multicast protocol data to ONU.
As shown in Figure 7, be a kind of system of protecting multicast to switch of the present invention, comprising: IP network control end 71, primary OLT72, spare OLT 73, ONU74;
Described ONU is used for, and by primary OLT optical line terminal, to IP network control end, is sent and adds bag; By described primary OLT, from adding the multicast protocol data of bag described in described IP network control end reception response; Described multicast protocol data are sent to spare OLT.
Described IP network control end is used for, and monitors the operating state of primary OLT; When the operating state of described primary OLT is when having fault, start the PON mouth of spare OLT; By the PON mouth of described spare OLT, according to described multicast protocol data, to ONU, send multicast traffic stream.
The present invention can be applied to comprise the passive optical network (XPON) of GPON, XGPON.
One of ordinary skill in the art will appreciate that, the all or part of step realizing in above-described embodiment method is to come the hardware that instruction is relevant to complete by program, described program can be stored in a computer read/write memory medium, this program is when carrying out, comprise the step as above-mentioned embodiment of the method, described storage medium, as: magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
In each embodiment of the method for the present invention; the sequence number of described each step can not be for limiting the sequencing of each step; for those of ordinary skills, do not paying under the prerequisite of creative work, the priority of each step is changed also within protection scope of the present invention.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a method of protecting multicast to switch, is characterized in that, comprising:
ONU optical-fiber network allocation units are sent and add bag to IP network control end by primary OLT optical line terminal;
Described ONU is by described primary OLT, from adding the multicast protocol data of bag described in described IP network control end reception response;
Described ONU sends to spare OLT by described multicast protocol data.
2. the method that protection multicast according to claim 1 is switched, is characterized in that, also comprises:
Described IP network control end is monitored the operating state of primary OLT;
When the operating state of described primary OLT is when having fault, described IP network control end starts the PON mouth of spare OLT;
Described IP network control end, by the PON mouth of described spare OLT, sends multicast traffic stream according to described multicast protocol data to ONU.
3. the method that protection multicast according to claim 2 is switched, is characterized in that, also comprises:
Described ONU sends to Set Top Box by described multicast traffic stream.
4. the method that protection multicast according to claim 1 is switched, is characterized in that, described ONU sends to the step of spare OLT to be specially described multicast protocol data:
Described ONU extracts address information from described multicast protocol data, and described address information is sent to spare OLT, makes described spare OLT according to described address information, and reduction generates described multicast protocol data.
5. the method that protection multicast according to claim 4 is switched, is characterized in that, described address information is carried the ID of source PON mouth, object PON mouth and GEM multicast group.
6. a device of protecting multicast to switch, is characterized in that, comprising:
The first transmitting element, is sent and adds bag to IP network control end by primary OLT optical line terminal;
Receiving element, from adding the multicast protocol data of bag described in described IP network control end reception response;
The second transmitting element, sends to spare OLT by described multicast protocol data.
7. ONU optical-fiber network allocation units according to claim 6, is characterized in that, described the second transmitting element comprises:
Extract subelement, from described multicast protocol data, extract address information;
Send subelement, described address information is sent to spare OLT, make described spare OLT according to described address information, reduction generates described multicast protocol data.
8. a device of protecting multicast to switch, is characterized in that, comprising:
Monitoring means, monitors the operating state of primary OLT;
Start unit, when the operating state of described primary OLT is when having fault, starts the PON mouth of spare OLT;
Transmitting element, by the PON mouth of described spare OLT, sends multicast traffic stream according to described multicast protocol data to ONU.
9. a system of protecting multicast to switch, is characterized in that, comprising: IP network control end, primary OLT, spare OLT, ONU;
Described ONU is used for, and by primary OLT optical line terminal, to IP network control end, is sent and adds bag; By described primary OLT, from adding the multicast protocol data of bag described in described IP network control end reception response; Described multicast protocol data are sent to spare OLT.
10. the system that protection multicast according to claim 9 is switched, is characterized in that,
Described IP network control end is used for, and monitors the operating state of primary OLT; When the operating state of described primary OLT is when having fault, start the PON mouth of spare OLT; By the PON mouth of described spare OLT, according to described multicast protocol data, to ONU, send multicast traffic stream.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310088567.4A CN104065493A (en) | 2013-03-19 | 2013-03-19 | Multicast switching protection method, device and system |
| PCT/CN2013/082009 WO2014146395A1 (en) | 2013-03-19 | 2013-08-21 | Method, apparatus and system for protecting multicast switchover |
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| CN201310088567.4A CN104065493A (en) | 2013-03-19 | 2013-03-19 | Multicast switching protection method, device and system |
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| CN104506972A (en) * | 2015-01-07 | 2015-04-08 | 烽火通信科技股份有限公司 | Quick ranging method for XG-passive optical network (XGPON) system protection switching |
| CN107612826A (en) * | 2017-09-28 | 2018-01-19 | 烽火通信科技股份有限公司 | One kind realizes PTN 1:1 and OTN 1+1 superposition guard method |
| CN109104343A (en) * | 2018-09-30 | 2018-12-28 | 四川长虹电器股份有限公司 | The optimization method that PON pattern of fusion gateway STB appliance services are established |
| CN111684428A (en) * | 2018-02-12 | 2020-09-18 | 华为技术有限公司 | Superscale clouded N-route protection |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104506972A (en) * | 2015-01-07 | 2015-04-08 | 烽火通信科技股份有限公司 | Quick ranging method for XG-passive optical network (XGPON) system protection switching |
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| CN107612826A (en) * | 2017-09-28 | 2018-01-19 | 烽火通信科技股份有限公司 | One kind realizes PTN 1:1 and OTN 1+1 superposition guard method |
| CN107612826B (en) * | 2017-09-28 | 2020-01-07 | 烽火通信科技股份有限公司 | Method for realizing superposition protection of PTN1:1 and OTN1+1 |
| CN111684428A (en) * | 2018-02-12 | 2020-09-18 | 华为技术有限公司 | Superscale clouded N-route protection |
| CN111684428B (en) * | 2018-02-12 | 2023-09-12 | 华为技术有限公司 | Super-scale clouding N-route protection |
| CN109104343A (en) * | 2018-09-30 | 2018-12-28 | 四川长虹电器股份有限公司 | The optimization method that PON pattern of fusion gateway STB appliance services are established |
| CN109104343B (en) * | 2018-09-30 | 2021-01-26 | 四川长虹电器股份有限公司 | Optimization method for PON fusion type gateway STB (set top box) equipment service establishment |
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| WO2014146395A1 (en) | 2014-09-25 |
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Application publication date: 20140924 |