CN203734686U - System for broadcasting IP multicast signal through SDH network - Google Patents
System for broadcasting IP multicast signal through SDH network Download PDFInfo
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- CN203734686U CN203734686U CN201420083353.8U CN201420083353U CN203734686U CN 203734686 U CN203734686 U CN 203734686U CN 201420083353 U CN201420083353 U CN 201420083353U CN 203734686 U CN203734686 U CN 203734686U
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- 230000008054 signal transmission Effects 0.000 description 3
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Abstract
The utility model relates to a system for broadcasting an IP multicast signal through a SDH network. The system comprises a central multicast source switchboard, SDH devices, a lower-level service switchboard and a terminal device. The central multicast source switchboard is erected at the central node of the broadcasting system. The SDH devices comprise a central node SDH device and sub-site SDH devices. A SFP module of the central multicast source switchboard is connected with the central node SDH device through a IP multicast signal output single fiber. The central node SDH device is connected with the sub-site SDH devices through a SDH transmission network. The OUT ports of sub-site SDH device SFP modules are in butt-joint with the IN port of the lower-level service switchboard SFP module. The terminal device is in butt-joint with the lower-level service switchboard. According to the utility model, the network transmission safety, stability and reliability can be ensured, the network utilization rate can be improved to the maximum extent, the device cost can be reduced, and the failure troubleshooting process is simple, so the operation and maintenance burden can be reduced significantly.
Description
Technical field
The utility model relates to the broadcast system that utilizes One-to-All Broadcast to realize bidirectional data transfers pattern, specifically a kind of system of utilizing SDH Web broadcast IP multicast signal.
Background technology
Flourish along with video, data service, the complicated first generation digital TV platform of DS3 signal+each cities and counties of a large amount of 45M of the upper transmission of former cause SDH adapter in heaps, QAM modulator composition is obsolescence along with the popularization of the new-generation digital TV platform equipment such as IPQAM equipment, under the new model of Digital Television development trend in Digital Television IPization, along with the integrated level raising of terminal equipment and the proposition of IPQAM technology, a kind of system of good IP multicast signal transmission is badly in need of in operator.
Transmission based on IP signal generally all needs to rely on bilateral network carrying, and for SDH transmission network, if each website be two-way come configuration service, just mean on this SDH transmission network loop and have how many websites just need take how many channel resources, relative cost is very high.Simultaneously, the development of business, be accompanied by the increase of two-way website quantity, also increased the destabilizing factor in business transmission, if adopt the two-way IP bearer network of the whole network, total platform and other all point platform are all intercommunications on network, and the interactivity of network may cause data traffic constantly to change, the problems such as data packet loss, time delay, also may exist from any one networked devices in more or less a hundred machine room and go wrong and all can affect the hidden danger of other equipment cisco unity malfunctions that are connected.O&M pressure is large, and investigation fault difficulty.
And for television network broadcast system, become the important tool that important news media and the people obtain knowledge entertainment, one of national information infrastructure that family's rate into family is the highest, its characteristics determined, self Internet Transmission must have fail safe and protection, and operation maintenance must possess its particularity and sensitiveness.
Some traditional businesses of Broadcast and TV system, as Digital Television, information broadcasting, stock etc., is characterized in that the content transmitting with the period in network is basic identical, and downlink business flow is huge, and uplink service flow is zero substantially.The character of these business has determined that unidirectional transmission form can meet the transmission requirement of such business.
Utility model content
Technical problem to be solved in the utility model is, ensureing Internet Transmission fail safe, stability, reliability and considering to save under the prerequisite of equipment cost and channel resource, a kind of system of the SDH of utilization Web broadcast IP multicast signal is provided, is not suitable for the defect of Broadcast and TV system partial service to overcome SDH transmission network transmitted in both directions function.
The utility model solves the problems of the technologies described above taked technical scheme: a kind of system of the SDH of utilization Web broadcast IP multicast signal, comprise center multicast source switch, SDH equipment, subordinate's service switch and terminal equipment, center multicast source switch frame is located at the Centroid of broadcast system, SDH equipment comprises the SDH equipment of Centroid and the SDH equipment of branch website, the SFP module of center multicast source switch is by the SDH equipment connection of an IP multicast signal output single fiber and Centroid, the SDH equipment of Centroid is by the SDH equipment connection of SDH transmission network and branch website, the OUT mouth of the SDH equipment SFP module of branch website docks with the IN mouth of the service switch SFP of subordinate module, terminal equipment docks with subordinate service switch.
The SDH equipment of described branch website comprises SDH equipment, the SDH equipment of the second branch website and the SDH equipment of the 3rd branch website of the first branch website, the SDH equipment of Centroid is by SDH transmission network and the SDH equipment of the first branch website and the SDH equipment connection of the 3rd branch website, the SDH equipment of the second branch website is by SDH transmission network and the SDH equipment of the first branch website and the SDH equipment connection of the 3rd branch website, and the SDH equipment of the SDH equipment of Centroid, the SDH equipment of the first branch website, the second branch website and the SDH equipment connection of the 3rd branch website form broadcast loop.
The utility model is by setting up center multicast source switch at Centroid, configuration multicast source address, the form of the IP data-signal IP multicast data flow that receives higher level is sent out, Validation Counter's multicast source switch sends a mouth of the SFP of multicast, makes the light signal input SDH transmission network Centroid access port of its IP multicast form; With the form of broadcast, center IP multicast signal is sent to each branch website in ring by SDH transmission network; The business OUT light mouth corresponding to SDH equipment of branch website docks with the service switch SFP of subordinate module I N, realizes center and branch website switch ports themselves and consults; The igmp querying device that generates the alternative center of igmp querying device multicast source switch with subordinate's service switch self, is broadcast to center multicast source exchange data on subordinate's service switch.Terminal equipment is by the IP multicast signal source information at subordinate's service switch access center.The utility model possesses following advantage:
(1) from front end to terminal, be all IP device, can dock with IP device, meet the demand of system integration, IPization;
(2) meeting under business demand prerequisite, very improve the occupancy of SDH transmission network wavelength-division passage, signal receives with the form transmission of One-to-All Broadcast, no matter opens how many website business and only take the resource of a passage for a loop, at utmost increases network utilization;
(3) broadcast characteristic does not affect self MSP defencive function of SDH transmission network, and loopful still can complete breakpoint self-healing function, and networking possesses stability and reliability:
(4) be unidirectional IP traffic through SDH transmission network signal transmission, realize the signal network of centring system and substation system and isolate, and the isolation of signal between substation system, guarantee network security;
(5), with the transmission form signal transmission of IP multicast, receiving equipment possesses must add signaling ability accesses network, possesses confidentiality for content;
(6) can avoid the data influence of undernet superior network or peer network, whether O&M department only need to monitor the data of playing from transmitting terminal normal, influence each other between subordinate's business without considering to come, malfunction elimination is succinct, has greatly alleviated O&M burden.
Brief description of the drawings
Fig. 1 is the utility model signal flow graph.
Fig. 2 is the utility model port activation figure.
Fig. 3 is the utility model port isolation figure.
Embodiment
Below in conjunction with accompanying drawing, the technical solution of the utility model is described further.
As shown in Figure 1, a kind of system of utilizing SDH Web broadcast IP multicast signal, set up Yi Tai center multicast source switch at Centroid, only export a single fiber IP multicast signal from SFP module, the SDH device A of access Centroid, the SDH device A of Centroid realizes the cross scheduling function by SDH transmission network business and is transferred to by the SDH device A of Centroid the SDH equipment B of the first branch website, signal arrives after the SDH equipment B of the first branch website, the SDH equipment B of the first branch website is divided into two-way by cross scheduling by signal, one circuit-switched data is landed and is connect subordinate's service switch 3, another road intersection break-through is to the SDH equipment C of the second branch website simultaneously, continue to repeat the bifurcated scheduling in the SDH of the first branch website equipment B at the SDH of the second branch website equipment C, a circuit-switched data is landed and connect subordinate's service switch 2, another road is crossed to the SDH equipment D of the 3rd branch website, SDH equipment D in the 3rd branch website is landed data to connect subordinate's service switch 1 by cross scheduling ability.Thereby finishing service is by the One-to-All Broadcast transmission mode of the SDH equipment D of SDH equipment C → three branch website of SDH equipment B → the second branch website of SDH device A → the first branch website of Centroid.
In the time of disconnected fibre, the website before disconnected fibre can be enabled protection Switch mode, service loop is transmitted to the enterprising industry business of reciprocal protection channel by cross scheduling ability at this website.When the SDH equipment C of SDH equipment B → the second branch website of the first branch website breaks fibre, the SDH equipment B point of the first branch website can be enabled wrap protection, the business of the SDH equipment D of SDH equipment C → three branch website of SDH device A → the second branch website of Centroid is looped back in reciprocal protection channel by cross scheduling ability in the SDH of the first branch website equipment B, thereby realize the protection transmission mode of business by the SDH equipment C of SDH equipment D → the second branch website of SDH device A → three branch website of the SDH equipment B → Centroid of SDH device A → the first branch website of Centroid.The IN mouth of the service switch SFP of subordinate docks with the SFP module OUT mouth of the corresponding business of SDH equipment of branch website, make the OUT mouth of the service switch SFP INKou Yu of subordinate center multicast source switch SFP complete interface negotiation, center multicast source exchange data is broadcast on subordinate's service switch.
In conjunction with Fig. 1, Fig. 2 and Fig. 3, concrete transmitting-receiving flow process of the present utility model is as follows:
(1) Centroid sets up center multicast source switch, and configuration multicast source address, sends out the form of the IP data source information IP multicast data flow that receives higher level; According to network characteristic and multicast source characteristic, when configuration multicast source address, adopt Source-Specific Multicast model Source-Specific Multicast; The Source-Specific Multicast static multicast group address that configure user can be used on the multicast source switch of center; The transmission of IP multicast data flow adopts IGMPv3 mechanism, and for multicast sources different in network, receiving terminal sends IGMPv3 report, the data that reception sources specifies the first multicast group to send; Or receiving terminal transmission IGMPv3 report, exit other multicast group of specifying except the first multicast group, make only to have the multicast information from the first multicast group just can be delivered to receiving terminal.
(2) force Validation Counter's multicast source switch to send a mouth of the SFP of multicast, make the light signal of its IP multicast form input the SDH device A access port IN of SDH transmission network Centroid; In the time that center multicast source switch does not receive passback IP light signal, utilize other switching equipment or transmission equipment to send the light signal of IP frame structure to the IN mouth of center multicast source switch SFP module, the OUT mouth of Validation Counter's multicast source switch by force, make center multicast source switch by IP data source information by this OUT mouth unidirectional the sending of mode with IP multicast data flow.
(3) the IP multicast signal of the SDH device A of Centroid is sent to the form of broadcast by SDH transmission network on the corresponding light mouth of SDH equipment D of SDH equipment C, the 3rd branch website of SDH equipment B, second branch website of the first branch website in ring, it is the cross scheduling ability powerful by SDH that SDH network transmits actual with the form of broadcast, when this broadcasting service arrives receiving station by SDH looped network, biography business down can be divided into two-way through SDH cross scheduling, when land on one tunnel, another road intersects break-through to next website, simultaneously, we utilize one way traffic not need the feature of back pass, original data feedback channel is used instead in protection channel, carry out counterclockwise and clockwise two mechanism of sending out in the program source business of naming a person for a particular job, carried out the looped network protection mechanism of MSP at receiving station, this one way traffic is carried out to the protection of loop, in transmission channel, no matter there is a how many website to pass down business and also only take a fixing channel resource.
(4) multicast source switch in center sends to all informations about multicast source in subordinate's service switch, subordinate's service switch can self generate igmp querying device and substitute center multicast source switch igmp querying device, terminal equipment is without center multicast source switch, and direct and subordinate's service switch is set up access.
(5) with the igmp querying device of the alternative center of subordinate's service switch self generation igmp querying device multicast source switch, center multicast source exchange data is broadcast on subordinate's service switch.On end host, enable IGMPv3 agreement, with the exchange interface of end host in the same network segment on enable IGMPv3 agreement.Whether requestor, to sharing the message that in the network segment, specific multicast group membership sends, is ready to receive for inquiring about this group membership the data that particular source sends.Multicast group field is the multicast group IP address being queried, and Number of Sources field is the multicast source quantity comprising in message, and Source Address field is the source address that sends multicast message to this group.The destination address field (DAF) that encapsulates the IP heading of this message is the IP address of the multicast group that is queried, and the switch multicast information in local network segment can be identified and receive to terminal.
(6) terminal equipment is by the IP multicast signal source information at subordinate's service switch access center.
Claims (2)
1. one kind is utilized the system of SDH Web broadcast IP multicast signal, it is characterized in that, comprise center multicast source switch, SDH equipment, subordinate's service switch and terminal equipment, center multicast source switch frame is located at the Centroid of broadcast system, SDH equipment comprises the SDH equipment of Centroid and the SDH equipment of branch website, the SFP module of center multicast source switch is by the SDH equipment connection of an IP multicast signal output single fiber and Centroid, the SDH equipment of Centroid is by the SDH equipment connection of SDH transmission network and branch website, the OUT mouth of the SDH equipment SFP module of branch website docks with the IN mouth of the service switch SFP of subordinate module, terminal equipment docks with subordinate service switch.
2. the system of utilizing SDH Web broadcast IP multicast signal according to claim 1, it is characterized in that, the SDH equipment of described branch website comprises the SDH equipment of the first branch website, the SDH equipment of the SDH equipment of the second branch website and the 3rd branch website, the SDH equipment of Centroid is by SDH transmission network and the SDH equipment of the first branch website and the SDH equipment connection of the 3rd branch website, the SDH equipment of the second branch website is by SDH transmission network and the SDH equipment of the first branch website and the SDH equipment connection of the 3rd branch website, the SDH equipment of Centroid, the SDH equipment of the first branch website, the SDH equipment connection of the SDH equipment of the second branch website and the 3rd branch website forms broadcast loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420083353.8U CN203734686U (en) | 2014-02-26 | 2014-02-26 | System for broadcasting IP multicast signal through SDH network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420083353.8U CN203734686U (en) | 2014-02-26 | 2014-02-26 | System for broadcasting IP multicast signal through SDH network |
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| CN203734686U true CN203734686U (en) | 2014-07-23 |
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| CN201420083353.8U Expired - Fee Related CN203734686U (en) | 2014-02-26 | 2014-02-26 | System for broadcasting IP multicast signal through SDH network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115412783A (en) * | 2022-08-25 | 2022-11-29 | 云南电网有限责任公司玉溪供电局 | SDH optical transmission network planning system and method |
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2014
- 2014-02-26 CN CN201420083353.8U patent/CN203734686U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115412783A (en) * | 2022-08-25 | 2022-11-29 | 云南电网有限责任公司玉溪供电局 | SDH optical transmission network planning system and method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 |
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| CF01 | Termination of patent right due to non-payment of annual fee |