CN1953354A - Transmission management system for traffic information by passive optical network of linear topology - Google Patents
Transmission management system for traffic information by passive optical network of linear topology Download PDFInfo
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- CN1953354A CN1953354A CNA2006100866762A CN200610086676A CN1953354A CN 1953354 A CN1953354 A CN 1953354A CN A2006100866762 A CNA2006100866762 A CN A2006100866762A CN 200610086676 A CN200610086676 A CN 200610086676A CN 1953354 A CN1953354 A CN 1953354A
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Abstract
The invention relates to an information transmission network used in traffic information system. Wherein, it uses the cable along road, uses inactive optical network technique, accesses into real-time traffic informant on road, and supplies relative Qos assurance; based on the topology character of road, changing the optical distribution network into point-to-multipoint bus structure, building traffic information transmission network; the network in inactive optical network, at each OLT/ONU, it has initial network manage ability; the traffic information collected by OLT can be accessed into traffic information special network, at the junction of system, to be managed and processed.
Description
Technical field
The present invention relates to communication, computer network, photoelectron, integrated circuit and software engineering, be applicable to highway communication network along the line (being highway, highway, viaduct and bridge traffic communication network along the line) field.Refer in particular to the transmission management system for traffic information that adopts EPON to insert.
Background technology
Transportation industry is the support department of national economy, is the infrastructural industries that are related to national economy.Along with the rapid growth of economy, the restrictive function of traffic appears day by day in recent years.The hysteresis of transport informationization makes in the handling problem of highway accident, can't monitor in real time timely and macro adjustments and controls.
Complete transmission management system for traffic information is made up of three parts, i.e. the hardware system of transport information transmission, the software systems and the traffic information management mechanism/management agreement of traffic information management.The hardware transmission system is responsible for the data acquisition and the transmission of transport information, and the real-time of data message, reliability are the most important condition that whole transmission management system for traffic information runs well; The effect of software systems is to analyze the original traffic information gathered, and integrates the data of separate sources, and with suitable, these information are expressed or issued timely to mode intuitively; Traffic information management mechanism or management agreement are the bases of transport information software and hardware system, guarantee the intact and operate as normal of software and hardware system, keep the normal operation of whole traffic information system.
Collecting method in the traffic system has multiple mode, comprise different traffic flow checkout equipments, come from the voice messaging of warning system, from relevant information of the video information of video monitoring system, policeman's police car location and information interaction system or the like, will comprise accident, weather, construction information in addition and handle after transport information or the like.Source, the precision, ageing of different information, all inequality.Guaranteeing the correctness of various information, ageing and consistency, and integrate the transport information of different features, is the prerequisite basic function of transmission management system for traffic information.
In traditional transport information transmission system, part adopts the mode of copper wire access.Copper wire access is because himself transmission medium has limited the expansion of message transmission bandwidth.The video acquisition of comprehensive road monitoring information, inevitable a large amount of demands that promote transport information transmission system bandwidth.Variation along with traffic information collection development of technology and acquisition means, traffic information system will receive the transport information of different media formats, as image, figure, voice and numeral etc., as a unified transmission management system for traffic information, the transport information that can support different media formats is crucial.And the mode of copper wire access can only simply be handled common voice and data service, can not comprehensively guarantee the reliability that multimedia service inserts.
In the present transport information transmission system, in highway a large amount of laying along the line optical fiber.The optical fiber access technology can be a transmission medium with optical fiber with the business datum that collects on the information gathering point, the transparent information management architecture that is sent to local side.Optical fiber inserts characteristics such as have that bandwidth is big, long transmission distance, reliability are high, and optical fiber to insert be the best way of implementing " few level, an institute of few office, overall situation institute " access network construction principle.But we have to be pointed out that, the point-to-point service access way of generally using not only needs a large amount of optical fiber, but also takies bigger space, consumes more electric power because of numerous light mouths at central machine room/local side place now.Such mode, the cost of investment that makes the transport information transmission system be used for aspects such as equipment, circuit increases greatly, is unfavorable for further development.
Because the condition of the outwork that the transport information transmission system is specific, it is outdoor inevitably to need access network equipment to be installed in, and operational environment is very abominable.Traditional light access way as SDH/MSTP looped network/gauze or multilevel hierarchy optical Ethernet, to local side, needs photoelectricity/electric light conversion, perhaps other the active equipment through intermediate node from professional collection point.The energy resource supply of these equipment, and all suitable complexity of operation maintenance make that the O﹠M cost of system is high.
In addition, on transport information transmission hardware system, the development of information management software platform lags behind equally.The separate storage and the processing of various transport information cause in time making things convenient for the various relevant informations of directly dispatching needs also to be integrated.Such mode can not guarantee the processing promptly and accurately to actual traffic information, and has influenced the ability of the macro adjustments and controls of management organization to a great extent.
In a word, the development of transmission management system for traffic information now lags behind the needs of the transportation industry and even the whole national economic development.Big capacity, low cost is easy to management and enforcement, and has the construction of the transmission management system for traffic information of high reliability, is a problem demanding prompt solution.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of satisfy high reliability, fast Large Volume Data transmission, transmission management system for traffic information with lower cost and good capacity expansion and upgrading ability, the transmission management system for traffic information that promptly adopts EPON to insert.The bus-organization of the point-to-points electricity of the transmission system that makes up, the physically linear characteristics of the highway communication of having coincide have improved the utilance of lightguide cable link.It has solved the access of highway transport information along the line and the problem that Fiber To The Curb simultaneously, and can realize the unified processing and the management of transport information on this basis.
The present invention adopts the technology of EPON, not only can guarantee the enormous bandwidth demand of transport information video monitoring system, and can satisfy the QoS requirement of different brackets of the transport information of various media formats, all transport information are guaranteed with reliability.System is with the bus type topological structure of point-to-multipoint, and the employing of inactive component cheaply, has improved the utilance of optical cable, has reduced the Installed capital cost of transmission network.Between passive optical network local side apparatus and a plurality of ustomer premises access equipment, the light distributed network (ODN) by compositions such as passive optical cable, light branch/mixers connects into network, and these characteristics have been brought the convenience of operation maintenance and the declining to a great extent of cost of PON network.
The present invention realizes by following technical scheme:
The transmission management system for traffic information that adopts EPON to insert makes up PON by the form based on the bus-type topology of point-to-multipoint.Optical-fiber network user/terminal that highway is along the line, the collection and the access of multiple business such as support voice, video, image, data, the light distributed network of forming by passive light branch/close road, the business information of all kinds of diverse locations is converged to optical line terminal, constitute the access network of transport information transmission system.
The present invention is the characteristics of linear distribution according to traffic highway, with the PON network of traditional tree, transforms and is the bus type topological structure that a little arrives multiple spot, has planned optical distributed network (ODN) again, as shown in Figure 1.By passive light branch/close the use of pipeline equipment, well adapted to the linear characteristics of highway physical topology, can all traffic informations be inserted various monitor terminals at highway dense distribution ONU along the line simultaneously.By adopting the optical branching device of different splitting ratios, in the adjustment/distribute power of following road optical fiber, make the luminous power mean allocation give each access device, reach better laser propagation effect.In the PON system, each OLT can be according to the needs of actual road section length and erection unit restriction, realize the branch of various ratios/close the road and the transmission range about 10/20km.PON support big along separate routes than situation under transmission range also greater than 20km.
Network construction form is so flexibly given full play to the characteristic of the high-speed and high-efficiency of EPON.The data message that all need be managed is collected at the ONU place by system, comprises the data such as current road conditions, charge or alarm that all terminal equipments are gathered in monitoring, charge, the communication system.Upload among the OLT by passive splitter, OLT further converges the data of each ONU, is uploaded to central office (Central Office), converges management to what the integral body of network was unified.
According to the highway construction situation of physical planning, can be connected to the roadside of each section highway flexibly with optical line terminal, as shown in Figure 2, set up the transport information transmission network.The traffic information of each section highway and related data are collected by the actual various terminal equipments that are arranged on the roadside, are linked in the optical network terminal.Normal conditions are to be equipped with optical cable along the line at highway, locate fiber optic tap in road down at intervals, connect an optical line terminal, form the subnet with PON of bus topolopy.Such mode can make full use of the optical cable that comprises multifiber.Simultaneously, we can in the mode of wavelength division multiplexing, improve the utilance of lightguide cable link greatly according to the development of WDM technology.
ONU provides the optical interface towards OLT, is used for realizing concrete monitoring, charge and the communication system of highway, the access of each terminal equipment.In order to adapt to the fast development of Modern Communication System, realize the reliable and flexibility that inserts, the equipment that we can omnibearing consideration ONU place can insert with and develop.The situation of various concrete equipment access ONU as shown in Figure 3.
Under the condition of the access facility that satisfies traditional road telecommunication system, we can also provide the access of wireless signal when the E1 of traditional form, Ethernet and video interface are provided.Wireless signal is with the form access network of WLAN, is getting in touch of traffic police's on-the-spot on duty and central office, and the use of wireless systems such as GPS, and great convenience is provided.In order to adapt to the development of electronic communication equipment with rapid changepl. never-ending changes and improvements, but our USB interface of integrated universal also, for the communication system of highway provides more fully service.Simultaneously, consider the needs of video capture device now, can also provide optical fiber interface in end side.According to actual road conditions demand, we can also insert novel electron equipment such as road sign and traffic information indicator panel.
According to real road surface situation, wagon detector, video monitor can be set in the roadside, and charging terminal, use the Ethernet delivery form, data centralization is converged to the central office, the unified processing.And can control the QoS of service needed by DBA, and provide huge bandwidth, transmission when guaranteeing the mass data of a plurality of video acquisition devices.The central office can be stored all data, and according to the actual needs selective reception, and send control command.By the management system of CO far-end, cradle head device that can control of video equipment is realized the video tracking in a certain vehicle or highway section is regulated, and realizes the complete monitoring in the whole highway section of highway.
OLT provides the second line of a couplet that links to each other with ONU optical interface, and provides a Network interface at least in the network terminal of optical access network (OAN), and it is positioned at Local Exchange or far-end, for the required business of ONU provides necessary load mode.The last connecting port of OLT can have multiple, professional classification not of the same race by different interfaces and transmission form, can be uploaded in core net or the transport information dedicated network.The corn module of OLT comprises that digital crossover connects, transmits multiplexing and ONU interface function.
In the practice of construction, we can be placed in fixed locations such as tollbooth on the way with optical line terminal, optical branching device and optical network terminal.Consider the structure of PON, do not need power supply in the transmission way, do not have the characteristics of electronic unit, when the equipment of optical branching device and Optical Network Terminal was installed, very easy laying need not be safeguarded substantially, saves long-term operation cost and management cost.Simultaneously, consider the highway present situation that has been equipped with optical cable usually along the line, also very simple for the transformation of former road network communication system.The PON system to the local side resource occupation seldom, degree of modularity height, system's initial stage drops into low, the planning and the process of building according to road network, extended network scale easily.
In road telecommunication system, the central office is set, concrete realization realizes the management to whole transport information platform to the control and the information interaction function of each terminal equipment.Each OLT uploads all end messages to the central office, and store or the deal with data content as required the central office, and is associated with the system resource database, comprehensively analyzes whole road traffic problem.By the traffic management information system of central office, storage and uniform is also managed all data, by the analysis to overall data, realizes macro adjustments and controls and decision-making.Highway management information system has been integrated whole information resource managements, finishes the function such as access, storage, processing, exchange, distribution of multi-source heterogeneous data by certain standard criterion.Simultaneously, accordingly decision information is sent to corresponding PON access subsystem, and then realizes remote management and control the roadside terminal equipment.By the assurance ability of PON system, can carry out real-time monitoring and handle as required different information QoS.
The present invention has following technical advantage and beneficial effect:
1) adopts the access way of PON, realized the transport information transmission system that Fiber To The Curb, improved the transmission speed and the transmission capacity of road telecommunication system greatly.
2) adopted bus type topological structure, the structure light distributed network has met highway communication and has been linear physical characteristics, has made full use of the highway lightguide cable link of laying along the line, has improved the optical cable utilance, has reduced the networking cost of investment.
3) topological structure of point-to-multipoint has reduced the quantity of local side optical transceiver to a great extent, has saved space and equipment use amount, has reduced the networking cost of investment.
4) transport information access network part takes passive optical device to build, and is simple in structure, is convenient to lay and safeguard, and can adapts to outdoor bad working environment substantially, reduced the network O﹠M cost.
5) the multiple business harvester is set, has satisfied the diversified demand of transport information.ONU is provided with multiple different business interface, inserts transmission when allowing voice, image, video, data message.
6) dynamic band width distributing ability that had of PON network makes that the Qos of various different business is guaranteed.
7) at central office place, the storage and uniform information data that regulates the traffic has improved the dynamics of traffic control center macro adjustments and controls.
Description of drawings:
By the description of carrying out below in conjunction with accompanying drawing to embodiment, above-mentioned and/or other purposes of the present invention and advantage will become apparent, wherein:
Fig. 1 illustrates point constructed according to the invention PON network structure to the bus-type topology of multiple spot
Fig. 2 illustrates the transport information transmission network schematic diagram that Fiber To The Curb
Fig. 3 illustrates the schematic diagram that ONU provides multiple transport information equipment access way
Fig. 4 illustrates the network structure of the transport information transmission system that the EPON mode builds.
Fig. 5 illustrates the bus-network structure chart of an EPON subsystem
The local side apparatus OLT of system is shown Fig. 6 and ustomer premises access equipment ONU forms structure
Embodiment
By with reference to following detailed description for exemplary non-limiting examples and figures, advantages and features of the invention and realize that method of the present invention can be easier to understand.Yet the present invention can implement with multiple different form, and the embodiment that should not be construed as limited in this explaination.In addition, thereby being provided, these embodiment the disclosure will be completely and completely, and will intactly design of the present invention be conveyed to those skilled in the art that the present invention will only be defined by claims.In specification, identical label is indicated identical parts all the time.
Adopt the form of EPON, set up transport information transfer management network.Optical cable is drawn in central office by traffic information management, and it is along the line to be laid on highway.Every about 20km,, settle an optical line terminal, shown in 4 figure by drawing a fiber optic tap in the optical cable.
The network configuration of each EPON subsystem all adopts the bus type structure that a little arrives multiple spot, and version as shown in Figure 5.EPON subsystem transmission range 20km has 16 ONU to insert, and considers ideal situation, and the distance between each ONU can be evenly distributed, so spacing is
。Need the mean allocation luminous power in the EPON system, if the luminous power total amount of OLT emission is made as 1, then each ONU divide luminous power be
At first, ONU is numbered, the ONU nearest apart from OLT is numbered ONU
1, along with the increase of distance, sequence number increases progressively successively, is ONU
2, ONU
3..., ONU
16Then can optical branching device numbering, the sequence number and the ONU of the optical branching device that directly links to each other with each ONU
nSubscript numbering identical.In addition, last optical branching device separates two ways of optical signals, is transferred to ONU respectively
15And ONU
16In, this optical branching device is numbered the subscript numbering of nearest ONU, is 15.Like this, just can determine the splitting ratio of each optical branching device, be numbered the optical branching device of n, splitting ratio is 1: (16+1-n).
Said system mainly is made up of local side apparatus OLT and ustomer premises access equipment ONU.Simplified topology of networks, specific analysis OLT and ONU equipment wherein, as shown in Figure 6.
OLT provides the optical interface that links to each other with ONU, provides a Network interface at least in the network terminal of optical access network (OAN), and it is positioned at Local Exchange or far-end, for the required business of ONU provides necessary load mode.
ONU provides the optical interface towards OLT, is used to realize that the user of OAN inserts.The user side of ONU provides alarm telephone, video monitoring equipment, trail guide screen, Ethernet and wireless various interface according to the needs of actual road conditions.
The invention is not restricted to the foregoing description, without departing from the present invention, can carry out various changes and modifications.
Claims (4)
1, the transmission management system for traffic information that adopts EPON to insert is characterized in that using the ODN of the bus-organization of point-to-multipoint, sets up roadside transport information access network.
2, the transmission management system for traffic information that inserts of employing EPON according to claim 1 is characterized in that utilizing the highway optical cable of laying along the line, at needs the position of OLT is set, and draws optical fiber from optical cable, inserts OLT.
3, the transmission management system for traffic information of employing EPON access according to claim 1, it is characterized in that adopting passive optical splitter to construct bus-structured ODN, according to the number that inserts ONU, adjust the splitting ratio of optical branching device, make each ONU have essentially identical power.
4, the transmission management system for traffic information of employing EPON access according to claim 1, it is characterized in that the OLT first line of a couplet has multiple interfaces, can receive the signal of the transport information dedicated network that particular operator provides, and the unlike signal (as broadband signal, telephone signal etc.) of common user's net, OLT second line of a couplet PON interface, ONU first line of a couplet PON interface, the ONU second line of a couplet has the multiple interfaces corresponding with OLT.
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| CNA2006100866762A CN1953354A (en) | 2006-06-28 | 2006-06-28 | Transmission management system for traffic information by passive optical network of linear topology |
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| CNA2006100866762A CN1953354A (en) | 2006-06-28 | 2006-06-28 | Transmission management system for traffic information by passive optical network of linear topology |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348668A (en) * | 2014-11-26 | 2015-02-11 | 国家电网公司 | Double-tree reliable passive optical network (PON) planning method based on fast approximate non-iteration |
| CN104794786A (en) * | 2015-04-15 | 2015-07-22 | 深圳前海芝麻开门网络通讯有限公司 | PON based access control system |
| CN108933631A (en) * | 2017-05-27 | 2018-12-04 | 中国电信股份有限公司 | Light power control method, device and the optical network system of optical network unit |
| CN111030896A (en) * | 2019-12-04 | 2020-04-17 | 中国联合网络通信集团有限公司 | Multi-service intelligent traffic network transmission system and method |
| WO2022227863A1 (en) * | 2021-04-26 | 2022-11-03 | 华为技术有限公司 | Optical communication system, optical signal transmission method, and related device |
| WO2024012197A1 (en) * | 2022-07-12 | 2024-01-18 | 华为技术有限公司 | Protection switching apparatus and open-circuit protection method |
-
2006
- 2006-06-28 CN CNA2006100866762A patent/CN1953354A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104348668A (en) * | 2014-11-26 | 2015-02-11 | 国家电网公司 | Double-tree reliable passive optical network (PON) planning method based on fast approximate non-iteration |
| CN104348668B (en) * | 2014-11-26 | 2018-05-04 | 国家电网公司 | One kind is based on quick nearly non-iterative double tree-like reliable PON planing methods |
| CN104794786A (en) * | 2015-04-15 | 2015-07-22 | 深圳前海芝麻开门网络通讯有限公司 | PON based access control system |
| CN108933631A (en) * | 2017-05-27 | 2018-12-04 | 中国电信股份有限公司 | Light power control method, device and the optical network system of optical network unit |
| CN111030896A (en) * | 2019-12-04 | 2020-04-17 | 中国联合网络通信集团有限公司 | Multi-service intelligent traffic network transmission system and method |
| CN111030896B (en) * | 2019-12-04 | 2022-02-15 | 中国联合网络通信集团有限公司 | Multi-service intelligent traffic network transmission system and method |
| WO2022227863A1 (en) * | 2021-04-26 | 2022-11-03 | 华为技术有限公司 | Optical communication system, optical signal transmission method, and related device |
| WO2024012197A1 (en) * | 2022-07-12 | 2024-01-18 | 华为技术有限公司 | Protection switching apparatus and open-circuit protection method |
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