CN104022829A - Ethernet optical transmission link with single Ethernet port converged outputting at center end - Google Patents
Ethernet optical transmission link with single Ethernet port converged outputting at center end Download PDFInfo
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- CN104022829A CN104022829A CN201410268020.7A CN201410268020A CN104022829A CN 104022829 A CN104022829 A CN 104022829A CN 201410268020 A CN201410268020 A CN 201410268020A CN 104022829 A CN104022829 A CN 104022829A
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Abstract
The invention discloses an Ethernet optical transmission link with single Ethernet port converged outputting at a center end, relates to the field of communication, and aims at providing an Ethernet optical transmission link with low cost and small size. The Ethernet optical transmission link is characterized by comprising a farthest end node, a link intermediate node and the center end, the farthest end node is used for packaging monitoring images output by a local surveillance camera into an Ethernet data package and outputting the Ethernet data package to an optical fiber to be transmitted, the link intermediate node is used for receiving Ethernet data output by the last far end node and the monitoring images output by the local surveillance camera and combining two paths of data into one path of Ethernet data which are output to the optical fiber to be transmitted, the center end is used for receiving and de-multiplexing the Ethernet data transmitted from nodes on the optical fiber so that Ethernet data packages of all the nodes can be obtained and multiplexing the Ethernet data packages of all the nodes to obtain one path of Ethernet data, and the path of Ethernet data obtained through multiplexing are output to the same port of a center end Ethernet exchanging chip.
Description
Technical field
The present invention relates to optical communication field.
Background technology
Current, high Qinghua trend of accompanying image, network high-definition camera becomes the IMAQ mode of main flow, correspondingly just need to build the Ethernet optical fiber transmission network that spreads all over each corner, city with by these unattended outdoor camera image transmittings to Surveillance center.In the time isolating 100M ethernet channel with separate physical in multinode (up to a hundred nodes) Optical Fiber Transmission business, center-side output needs up to a hundred independently physically-isolated 100M Ethernet tandems outputs.Shown in Fig. 1 is exactly the Ethernet optical transmission chain of multinode access in prior art.
All nodes (such as corresponding 100 distant-end nodes) PHY mouth or MII mouth are accessed enough large exchanger chip by original technical scheme, in center-side exchange chip, complete buffer memory and exchange, finally converge to the Ethernet interface output of a 100M or 1000M.
The shortcoming of which is, needs the Ethernet switching chip of tens of and even switching ports up to a hundred in pool side, and not only technical sophistication degree is high, and with high costs, and equipment volume is larger.
Summary of the invention
Technical problem to be solved by this invention is: for the problem of above-mentioned existence, provide a kind of center-side list ethernet port to converge the Ethernet optical transmission chain structure of output.
The technical solution used in the present invention is as follows: comprise distal-most end node, link intermediate node and center-side; Described distal-most end node, link intermediate node and center-side are linked in sequence by optical fiber;
Described distal-most end node is for being packaged into Ethernet data bag by the monitoring image of local monitor video camera output, and described Ethernet data bag is exported on optical fiber and transmitted by the Ethernet switching chip of this node;
Described link intermediate node is for receiving the Ethernet data of a distant-end node output and the monitoring image of local monitor video camera output, two paths of data is multiplexed into a road Ethernet data, and the Ethernet data that is multiplexed into a road is input to a port of this node Ethernet switching chip and is outputed on optical fiber and transmitted by other ports of this node Ethernet switching chip;
Described center-side is for receiving the Ethernet data that on optical fiber, node transmits, by its demultiplexing, obtain the Ethernet data bag of each node, the Ethernet data bag of each node is carried out to the multiplexing road Ethernet data that obtains, the described multiplexing Yi of obtaining road Ethernet data is exported to the same port with center-side Ethernet switching chip again.
Further, described distal-most end node comprises CCTV camera, data processing unit and Ethernet switching chip, described CCTV camera is connected with the input of described data processing unit, and the output of data processing unit is connected with a port of Ethernet switching chip; Described data processing unit is for being packaged into Ethernet data bag by the monitoring image of CCTV camera output; Described Ethernet switching chip is transmitted for exporting the picture control information Ethernet data bag of this node to optical fiber from other port.
Further, described link intermediate node comprises CCTV camera, far-end Ethernet data input port, the first buffer area, the second buffer area, data processing unit, data-reusing unit and Ethernet switching chip; Far-end Ethernet data input port is for connecting optical fiber to receive the Ethernet data of a upper distant-end node output; Described CCTV camera is connected with described data processing unit, and data processing unit is for being packaged into Ethernet data bag by the monitoring image of CCTV camera output; The data that described the first buffer area receives for buffer memory far-end Ethernet data input port; Described the second buffer area is for the data of data cached processing unit output; Described data-reusing circuit, for by the data-reusing Cheng Yi road of the first buffer area and the second buffer area, transmits it to a port of this node Ethernet switching chip; Described Ethernet switching chip is transmitted for exporting multiplexing Hou mono-road Ethernet data to optical fiber from its other ports.
Further, described center-side comprises Ethernet data input port, package recovery module, data-reusing module and Ethernet switching chip; Described Ethernet data input port is used for the Ethernet data that receiving node transmits from optical fiber; Package recovery module obtains the Ethernet data bag of each node for the Ethernet data demultiplexing that node is transmitted; Data-reusing module has and is connected with package recovery module, for the Ethernet data bag of each node being carried out to the multiplexing road Ethernet data output that obtains; The output of described data-reusing module is connected with the same MII mouth of center-side Ethernet switching chip.
In sum, owing to having adopted technique scheme, the invention has the beneficial effects as follows:
1. in the system that reaches up to a hundred nodes, even if access the Ethernet of up to a hundred separate physical isolation, also without export up to a hundred independently Ethernet interfaces in center-side, or need to design framework and reach the switch unit of up to a hundred ports, greatly simplify the design of center-side Ethernet-Aggregation part, reduced system cost.
2, the present invention has brought the lifting of security of system.In the fibre system accessing at the Ethernet of multiple nodes, because switch or exchange chip have such forwarding feature: can not forward at the port for the packet entering from port of exchange chip, therefore in the present invention, between each node, cannot mutually access, even if certain node is invaded, invader can not directly obtain the image information of other node, Ethernet interface between all nodes is relatively independent, can not form mutually communication.
Brief description of the drawings
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is the high-definition network camera local area network structure figure of prior art.
Fig. 2 is node and center-side information exchange principle schematic in the present invention.
Fig. 3 is the functional block diagram of distal-most end node in the present invention.
Fig. 4 is the functional block diagram of intermediate node in the present invention.
Fig. 5 be in Fig. 4 data-reusing module change a specific embodiment.
Fig. 6 is the functional block diagram of center-side of the present invention.
Embodiment
Disclosed all features in this specification, or step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Disclosed arbitrary feature in this specification, unless narration especially all can be replaced by other equivalences or the alternative features with similar object.,, unless narration especially, each feature is an example in a series of equivalences or similar characteristics.
As Fig. 2, one embodiment of the present of invention are to be applied in the high-definition network camera network of chain multinode access.This network comprises some nodes, after each node serial connection, is connected with center-side, describes for the ease of clear, and node is divided into distance center end node and intermediate node farthest.Distance center end node farthest is only responsible for picture control communication that this node CCTV camera is photographed to the nearer node of next distal end, and it is not as the transmission channel of other node image monitor messages.Intermediate node, except the picture control information that this node CCTV camera need to be collected is exported to the nearer node of next distal end, also will be served as the transmission channel of a distant-end node picture control information on it.
The present invention, by each node and center-side internal structure are improved, makes the access unit of node can effectively prevent the unauthorized access at a certain Nodes, and specific practice of the present invention is such:
As Fig. 3, in a specific embodiment, described distal-most end node comprises CCTV camera, data processing unit and Ethernet switching chip, described CCTV camera is connected with the input of described data processing unit, and the output of data processing unit is connected with a port of Ethernet switching chip; Described data processing unit is for being packaged into Ethernet data bag by the monitoring image of CCTV camera output; Described Ethernet switching chip is transmitted for exporting the picture control information Ethernet data bag of this node to optical fiber from other port.
As Fig. 4, an embodiment of described link intermediate node is such: comprise CCTV camera, far-end Ethernet data input port, the first buffer area, the second buffer area, data processing unit, data-reusing unit and Ethernet switching chip.Far-end Ethernet data input port is for connecting optical fiber to receive the Ethernet data of a upper distant-end node output; Described CCTV camera is connected with described data processing unit, and data processing unit is for being packaged into Ethernet data bag by the monitoring image of CCTV camera output; The data that described the first buffer area receives for buffer memory far-end Ethernet data input port; Described the second buffer area is for the data of data cached processing unit output; Described data-reusing circuit, for by the data-reusing Cheng Yi road of the first buffer area and the second buffer area, transmits it to a port of this node Ethernet switching chip; Described Ethernet switching chip is transmitted for exporting multiplexing Hou mono-road Ethernet data to optical fiber from its other ports.
Shown in Fig. 5 is an embodiment of data-reusing unit in intermediate node.Data-reusing unit reads the data of the first buffer area and the second buffer area in turn, puts successively the buffer area of inside, data-reusing unit into, finally by the data serial output in its inner buffer district.It is this that the execution mode of data-reusing module is not limited to Fig. 4, and intermediate node can also adopt code division multiplexing or self-defining multiplex mode by synthetic the data in a two buffer areas road Ethernet data in other embodiments.
As Fig. 6, described center-side comprises Ethernet data input port, package recovery module, data-reusing module and Ethernet switching chip.
Described Ethernet data input port is used for the Ethernet data that receiving node transmits from optical fiber; Package recovery module obtains the Ethernet data bag of each node according to the upper node of node and the local ethernet packet Ethernet data demultiplexing that the agreement of package transmits node again.
Data-reusing module has and is connected with package recovery module, for the Ethernet data bag of each node being carried out to the multiplexing road Ethernet data output that obtains; The output of described data-reusing module is connected with the same MII mouth of center-side Ethernet switching chip.Data-reusing mode herein can be time division multiplexing, code division multiplexing etc.
In conjunction with Fig. 2, operation principle of the present invention and technique effect are described again below.
Ethernet switching chip has such forwarding feature: for from a port, as a MII mouth, the packet entering can not forward at the port, but at other port, as other MII mouth or PHY mouth, forwards.As shown in Figure 4: RTU-1, RTU-2, tri-Ethernet switching chip of RTU-3 lay respectively in the node of three series connection, connect the Ethernet data of RTU-1, RTU-2, RTU-3 Ethernet switching chip MII mouth, after forwarding step by step, all enter the port one (port one is MII mouth) of the Ethernet switching chip of center-side, because the Ethernet data of 3 RTU has all entered the same port of local side exchange chip, so the ethernet port communication mutually between RTU-1, RTU-2, tri-Ethernet switching chip of RTU-3.And other ports of center-side Ethernet switching chip can carry out communication with the Ethernet interface of the Ethernet switching chip of any one node.Visible the present invention has not only saved the port of center-side Ethernet switching chip, can also effectively prevent the unauthorized access of Nodes.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination disclosing in this manual, and the arbitrary new method disclosing or step or any new combination of process.
Claims (4)
1. center-side list ethernet port converges an Ethernet optical transmission chain for output, it is characterized in that, comprises distal-most end node, link intermediate node and center-side; Described distal-most end node, link intermediate node and center-side are linked in sequence by optical fiber;
Described distal-most end node is for being packaged into Ethernet data bag by the monitoring image of local monitor video camera output, and described Ethernet data bag is exported on optical fiber and transmitted by the Ethernet switching chip of this node;
Described link intermediate node is for receiving the Ethernet data of a distant-end node output and the monitoring image of local monitor video camera output, two paths of data is multiplexed into a road Ethernet data, and the Ethernet data that is multiplexed into a road is input to a port of this node Ethernet switching chip and is outputed on optical fiber and transmitted by other ports of this node Ethernet switching chip;
Described center-side is for receiving the Ethernet data that on optical fiber, node transmits, by its demultiplexing, obtain the Ethernet data bag of each node, the Ethernet data bag of each node is carried out to the multiplexing road Ethernet data that obtains, the described multiplexing Yi of obtaining road Ethernet data is exported to the same port with center-side Ethernet switching chip again.
2. center-side list ethernet port according to claim 1 converges the Ethernet optical transmission chain of output, it is characterized in that, described distal-most end node comprises CCTV camera, data processing unit and Ethernet switching chip, described CCTV camera is connected with the input of described data processing unit, and the output of data processing unit is connected with a port of Ethernet switching chip; Described data processing unit is for being packaged into Ethernet data bag by the monitoring image of CCTV camera output; Described Ethernet switching chip exports the picture control information Ethernet data bag of this node to optical fiber from other port and transmits.
3. center-side list ethernet port according to claim 2 converges the Ethernet optical transmission chain of output, it is characterized in that, described link intermediate node comprises CCTV camera, far-end Ethernet data input port, the first buffer area, the second buffer area, data processing unit, data-reusing unit and Ethernet switching chip; Far-end Ethernet data input port is for connecting optical fiber to receive the Ethernet data of a upper distant-end node output; Described CCTV camera is connected with described data processing unit, and data processing unit is for being packaged into Ethernet data bag by the monitoring image of CCTV camera output; The data that described the first buffer area receives for buffer memory far-end Ethernet data input port; Described the second buffer area is for the data of data cached processing unit output; Described data-reusing circuit, for by the data-reusing Cheng Yi road of the first buffer area and the second buffer area, transmits it to a port of this node Ethernet switching chip; Described Ethernet switching chip is transmitted for exporting multiplexing Hou mono-road Ethernet data to optical fiber from its other ports.
4. center-side list ethernet port according to claim 3 converges the Ethernet optical transmission chain of output, it is characterized in that, described center-side comprises Ethernet data input port, package recovery module, data-reusing module and Ethernet switching chip; Described Ethernet data input port is used for the Ethernet data that receiving node transmits from optical fiber; Package recovery module is used for the Ethernet data demultiplexing that node is transmitted, and obtains the Ethernet data bag of each node; Data-reusing module has and is connected with package recovery module, for the Ethernet data bag of each node being carried out to the multiplexing road Ethernet data output that obtains; The output of described data-reusing module is connected with the same MII mouth of center-side Ethernet switching chip.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106773986A (en) * | 2016-12-30 | 2017-05-31 | 广州澳视互动传媒有限公司 | Digital Transmission case and fault diagnosis system |
| CN114531606A (en) * | 2022-02-22 | 2022-05-24 | 重庆紫光华山智安科技有限公司 | Method, system and equipment for generating packaged video data to be transmitted and transmitting video |
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| US7043541B1 (en) * | 2000-09-21 | 2006-05-09 | Cisco Technology, Inc. | Method and system for providing operations, administration, and maintenance capabilities in packet over optics networks |
| CN102097001A (en) * | 2010-12-22 | 2011-06-15 | 深圳市诺龙实业有限公司 | Video monitor data transmission system |
| CN102665152A (en) * | 2012-05-11 | 2012-09-12 | 武汉邮电科学研究院 | Novel wide-area coverage hybrid wavelength-time division multiplexing passive optical network system |
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| US7043541B1 (en) * | 2000-09-21 | 2006-05-09 | Cisco Technology, Inc. | Method and system for providing operations, administration, and maintenance capabilities in packet over optics networks |
| CN102097001A (en) * | 2010-12-22 | 2011-06-15 | 深圳市诺龙实业有限公司 | Video monitor data transmission system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106773986A (en) * | 2016-12-30 | 2017-05-31 | 广州澳视互动传媒有限公司 | Digital Transmission case and fault diagnosis system |
| CN106773986B (en) * | 2016-12-30 | 2019-03-19 | 广州傲视物联网信息技术有限公司 | Digital Transmission case and fault diagnosis system |
| CN114531606A (en) * | 2022-02-22 | 2022-05-24 | 重庆紫光华山智安科技有限公司 | Method, system and equipment for generating packaged video data to be transmitted and transmitting video |
| CN114531606B (en) * | 2022-02-22 | 2023-04-11 | 重庆紫光华山智安科技有限公司 | Method, system and equipment for generating packaged video data to be transmitted and transmitting video |
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Effective date of registration: 20180504 Address after: 610041 No. 3, 1 building, 11 Gaoxin Avenue, Chengdu high tech Zone, Sichuan A Patentee after: Candice Sichuan Micro Control Technology Co Ltd Address before: 610041 3 building, A block, science and Technology Industrial Park, hi tech Zone, No. 11, Gaoxin Avenue, Chengdu High-tech Zone, Sichuan Patentee before: Sichuan Wei Di telecom technology co., ltd |
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