CN1109431C - Asynchronous transfer mode turn-on device for public network - Google Patents
Asynchronous transfer mode turn-on device for public network Download PDFInfo
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- CN1109431C CN1109431C CN 99105503 CN99105503A CN1109431C CN 1109431 C CN1109431 C CN 1109431C CN 99105503 CN99105503 CN 99105503 CN 99105503 A CN99105503 A CN 99105503A CN 1109431 C CN1109431 C CN 1109431C
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Abstract
The present invention relates to an access device in an asynchronous transfer mode for a public network. A backboard is arranged at the back of the body frame of the access device, a plurality of rows of slots are arranged on the backboard, an exchange bus and a control bus are arranged on the backboard, and power boards, clock boards, control boards, interface boards facing to different businesses at a user side, and line interface boards facing to ATM switching networks are inserted into the slots. The device uses different insertion boards with modularized structure and a switching mode of inner buses for realizing cell switching and processing and can provide flexible and convenient business access. Moreover, the device supports various kinds of business access with the different requirements of flow characteristics and service quality, has the advantages of reliable work, flexible arrangement and convenient maintenance and is an important supporting device for a broadband integrated service digital network.
Description
Affiliated field
The present invention relates to a kind of important support equipment of broadband integrated services digital network, exactly, relate to a kind of asynchronous transfer mode ATM access device of common network.
Background technology
Traditional communication network is that for example transporting speech has telephone network to net of each service construction basically, and the transmission data then have Packet Based Network or the like.Because improving constantly of the human society level of informatization, the communication service kind is on the increase, and traffic carrying capacity also increases rapidly, and legacy network more and more can not adapt to the demand that communication increases.So, along with microelectric technique, the develop rapidly of computer technology and optical communication technique and extensive use, broad band Integrated service digital communication network as contemporary world telecommunication technology developing direction (is called for short: the expectation that exceeds people soon of development process B-ISDN), and asynchronous transfer mode (being ATM:Asynchronous Transfer Mode) is the key support technology of following B-ISDN, it can realize that multiple business is (as speech, data, image etc.) function of all in single net, transmitting and exchanging, so, how people realize as early as possible that in research legacy network is to the B-ISDN transition based on atm technology, build the ATM backbone network, to satisfy ever-increasing communication requirement.Asynchronous transfer mode ATM access device is a considerable component devices in the atm network, and its major function is user service flow to be carried out multiplexing, and finishes corresponding access control and maintenance management.Fig. 1 has showed the application example of ATM access device 1 ' in network, this equipment 1 ' can insert atm network 4 ' with 2Mb/s and 25Mb/s speed respectively with the speech of telephone set 2 ', the business information such as data of computer 3 ', and the speed of the output link of this network 4 ' is at least 155Mb/s.Occurred the elementary ATM access device that some can only be applicable to local area network (LAN) or private network environment in the market, the general adaptive atm device that has that really goes under the public environment also still is the scientific research task that a lot of in the world telecommunications companies are studying and attempting to capture.
Summary of the invention
The asynchronous transfer mode access device that the purpose of this invention is to provide a kind of common network, this device can provide flexibly for the user, service access easily, support the service access that multiple discharge characteristic is different with operation quality requirement, and reliable operation, flexible configuration, be convenient to safeguard.
The object of the present invention is achieved like this: a kind of asynchronous transfer mode access device of common network, its main body are the machine frames of cuboid, and the machine frame rear portion is a backboard, is provided with the multiple row slot on this backboard, and every row slot can correspondence be inserted with a plate; Described plate includes: power panel, clock board and control board, the interface board of the different business of user oriented side: cable voice port plate, data interface board, image interface plate and towards the line interface base of ATM switching network; It is characterized in that: this equipment also be provided with slot in each plate switching bus of carrying out cell switching and processing, described plate is to adopt modular construction.
Each plate in described and the slot realizes that the switching bus of cell switching includes data/address bus, control bus and clock line, and this switching bus is arranged on the backboard.
The signal that transmits on the described switching bus adopts the GTL level, promptly high level be 0,86v, low level is 0,66v, peak-to-peak value voltage has only the GTL level of 200mv.
The interface board of described different business links to each other with subscriber equipment by different physical interfaces; And line interface base links to each other with the ATM switching network by fibre circuit.
Three kinds of different business interface boards of described employing modular construction, except user interface and ATM protocol adaptation partly had nothing in common with each other, the circuit structure of other parts was identical.
Described power panel, clock board and control board all adopt the double copies mode to work.
The contact pin of described each plate has three kinds of different lengths, and the contact pin of ground connection is the longest, and the contact pin of holding wire takes second place, and the contact pin that connects power supply is the shortest.
The present invention has stronger application flexibility as the ATM access device of common network, can be applied in various occasions easily, supports the access of the business that multiple discharge characteristic is different with operation quality requirement.Maximum characteristics of the present invention are that the switching bus and the control bus that adopt each modular plate to share are realized inner cell switching.Switching bus and the control bus that should share are arranged on the backboard of machine frame rear side.General structure high opening of the present invention can provide flexibly and service access easily for the user; Insert easyly, flexible, the kind of access service can comprise such as speech, data and graphic service, speed from tens of Kb/s to Mb/s up to a hundred; Can be according to requirements of different users, configuration corresponding interface module and modular various plate are realized multiple services comprehensively, are easy to function and expand and device upgrade.Extensive use of the present invention can be quickened the construction of atm network and B-ISDN.
Project organization of the present invention is succinct, clear, function is strong, and expansion is very easy to; Because crucial plate has been made double copies, the functional reliability height, system can non-stop run; Simultaneously, can realize the requirement that user multi-service inserts, and can dispose flexibly according to user's requirement.
Description of drawings
Fig. 1 is the application example schematic diagram of ATM access device in network;
Fig. 2 is a contour structures schematic diagram of the present invention;
Fig. 3 is a functional-block diagram of the present invention;
Fig. 4 is the schematic diagram that the present invention realizes inner exchanging;
Fig. 5 is a service interface board functional-block diagram of the present invention.
Embodiment
Referring to Fig. 2, the present invention adopts closed-in construction, its main body is the machine frame 1 of cuboid, the rear portion of machine frame 1 is a backboard (not shown), on this backboard, be provided with the multiple row slot, every row slot can correspondence be inserted with a plate 2, plate 2 in the slot is except including power panel 21 (PWR), clock board 22 (CLK) and control board 23 (CPP) are in addition, also include: the interface board at different business of user oriented side: cable voice port plate 24 (EVI), data interface board 25 (AOI) and image interface plate 26 (HDI), and towards the line interface base 27 (ALI) of ATM switching network.Above-mentioned service interface board 24,25,26 links to each other with subscriber equipment by different physical interfaces; Line interface base 27 then links to each other with the ATM switching network by fibre circuit.
Referring to functional structure block diagram of the present invention shown in Figure 3, the control processor on the control board 23 communicates by control bus 31 and each interface board, implements control and management.And image interface plate 26, cable voice port plate 25 and data interface board 24 user oriented side all inserts user's different business.The Business Stream that inserts becomes atm cell stream through the ATM protocol adaptation on each service interface board, is multiplexed into line interface base 27 by switching bus 32 again.Line interface base 27 is delivered to the ATM switching network by 155Mb/s single mode/multimode fiber and is exchanged connection towards the ATM switching network.In addition, clock board 22 can provide accurate system clock, and 21 of power panels provide stable 5V power supply.
The present invention adopts double copies to power panel 21, clock board 22 and control board 23, referring to Fig. 2 in order to guarantee the reliable and stable of equipment work.Also can look its significance level for service interface board 24,25,26 and select whether to carry out double copies.In addition, the contact pin of every block of plate of the present invention has been made particular design: the contact pin of ground connection is the longest, and the contact pin of holding wire takes second place, and the contact pin that connects power supply is the shortest.Can guarantee that like this when plug, contact ground wire, and then activation signal line earlier is power line at last.Situation when pulling out plate is just in time opposite, thereby guarantees the reliability of hot plug, and can not influence the operate as normal of other parts in the system.
Exchanged form of the present invention is to adopt the exchange of ATM bus type.Bus is arranged on the backboard, the about 500mm of length, and the line number signal of ATM switching bus has 37, comprises 32 data lines, 2 control lines and 3 clock lines.Holding wire speed reaches as high as 32Mb/s, and the exchange capacity of bus can reach 1Gb/s.In order to adapt to two-forty exchange, bus signals of the present invention adopts the GTL level, promptly the voltage high level be 0,86v, low level is 0,66v, the peak-to-peak value change in voltage has only 200mv.
Adopt the advantage of bus switch to be: one, access is very flexible, is convenient to realize that bus resource is shared.Because the major function of ATM access device is to carry out converging of Business Stream, adopts bus mode with regard to having realized very simply ATM cell to be carried out multiplexing function.Two, the function division is clear, is convenient to upgrading, transforms.One side of bus is line interface base, links to each other with the ATM switching network by fibre circuit: the another side of bus is a plurality of service interface boards, links to each other with subscriber equipment by different physical interfaces.This bus type exchanged form realize multiplexing method make to each interface board change or transform all needn't system for varying structure, can structurally not exert an influence to other plate yet, make the transformation of system and upgrading become very easy.Three, can carry out flexible configuration, so that satisfy user's demand to greatest extent.For example, user's main business is a speech, and the present invention can not adorn or adorn less data interface board and image interface plate, and polygamy is put several cable voice port plates.Four, can utilize commercial ATM exchange chip and reduce development difficulty and the shortening lead time.Just adopted the CUBIT exchange chip of U.S. Transwitch company among the present invention.
The present invention can also directly carry out inner exchanging except can be multiplexing.Referring to Fig. 4, two telephone subscriber A, B can directly communicate and needn't pass through the ATM switching network again by the present invention.Detailed process is: when telephone subscriber A will with another user B conversation, the party A-subscriber sends the request that connects to the present invention.Whether the present invention inquires about party A-subscriber's callee in this locality, if the called subscriber is connected on the local access device, just can be directly connect for user A and B, and the process that needn't connect to the atm network application again, thereby shorten connection setup time greatly, alleviate the load of ATM switching network, guaranteed professional service quality better.
Control bus of the present invention is the important component part that realizes machine system control, and control board is controlled each interface board by control bus.Control bus of the present invention runs through whole back plate, has 40 holding wires, and wherein data wire is 16,4 of 20 of address wires and other control signal wires, and the speed of holding wire is 8Mb/s.The characteristics of control bus of the present invention are simple, are easy to realize, can guarantee effectively to communicate by letter reliably between control board and other interface board.
The present invention is respectively equipped with cable voice port plate 24, data interface board 25 and image interface plate 26 according to the kind difference of business.Their circuit structure is basic identical, all forms (referring to shown in Figure 5) by processor, ATM protocol adaptation, memory, control bus interface, switching bus interface and several parts of user interface.Between each interface board, except user interface and ATM protocol adaptation partly had nothing in common with each other, the circuit structure of remainder was identical.The wherein work of system in processor control and the Conforming Elements for Plate Bending Problems, processor communicates by control bus interface and control board, and information flow receives and sends by user interface.The ATM protocol adaptation is finished the adaptation processing to information flow, information is assembled in the ATM cell goes, and the cell that assembles exchanges by switching bus.Really, if when user itself is exactly an ATM terminal, the ATM protocol adaptation part on the interface board then of the present invention just can have been omitted.Because it is adaptive that user service flow has been carried out in end side, task of the present invention just just realizes the access of atm cell flow and multiplexing, and does like this whole system or the present invention all without any influence.
Wherein, the user interface of cable voice port plate is the E1 of standard (2Mb/s), and ATM protocol adaptation subdialogue message breath carries out the protocol processes of AAL1.The user interface of data interface board can be the 10M Ethernet interface, and ATM protocol adaptation part is carried out the AAL5 adaptation processing to data message, uses the SARA chip of U.S. Transwitch company as the protocol adaptation control chip among the embodiment.The user interface of image interface plate can be the ATM-25M interface.Line interface base adopts the PMC5345 model integrated circuit of U.S. PMC company as the protocol adaptation control chip among the embodiment.
The present invention has trial-produceed some in model machine successfully, through online test, has realized the demand that user multi-service inserts, and can carry out flexible configuration according to customer requirements, and reliable operation can hot plug and non-stop run.
Claims (7)
1, a kind of asynchronous transfer mode access device of common network, its main body is the machine frame of cuboid, and the machine frame rear portion is a backboard, is provided with the multiple row slot on this backboard, and every row slot can correspondence be inserted with a plate; Described plate includes: power panel, clock board, control board, the interface board of the different business of user oriented side: cable voice port plate, data interface board, image interface plate and towards the line interface base of ATM switching network; It is characterized in that: this equipment also be provided with slot in each plate switching bus of carrying out cell switching and processing, described plate is to adopt modular construction.
2, the asynchronous transfer mode access device of common network as claimed in claim 1, it is characterized in that: each plate in described and the slot realizes that the switching bus of cell switching includes data/address bus, control bus and clock line, and this switching bus is arranged on the backboard.
3, the asynchronous transfer mode access device of common network as claimed in claim 1 or 2, it is characterized in that: the signal that transmits on the described switching bus adopts the GTL level, be that high level is 0,86v, low level is 0,66v, and peak-to-peak value voltage has only the GTL level of 200mv.
4, the asynchronous transfer mode access device of common network as claimed in claim 1 is characterized in that: the interface board of described different business links to each other with subscriber equipment by different physical interfaces; And line interface base links to each other with the ATM switching network by fibre circuit.
5, as the asynchronous transfer mode access device of claim 1 or 4 described common networks, it is characterized in that: three kinds of different business interface boards of described employing modular construction, except user interface and ATM protocol adaptation partly had nothing in common with each other, the circuit structure of other parts was identical.
6, as the asynchronous transfer mode access device of claim 1 or 4 described common networks, it is characterized in that: described power panel, clock board and control board all adopt the double copies mode to work.
7, as the asynchronous transfer mode access device of claim 1 or 4 described common networks, it is characterized in that: the contact pin of described each plate has three kinds of different lengths, and the contact pin of ground connection is the longest, and the contact pin of holding wire takes second place, and the contact pin that connects power supply is the shortest.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99105503 CN1109431C (en) | 1998-07-17 | 1999-04-09 | Asynchronous transfer mode turn-on device for public network |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98206989.8 | 1998-07-17 | ||
| CN98206989 | 1998-07-17 | ||
| CN 99105503 CN1109431C (en) | 1998-07-17 | 1999-04-09 | Asynchronous transfer mode turn-on device for public network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1236256A CN1236256A (en) | 1999-11-24 |
| CN1109431C true CN1109431C (en) | 2003-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 99105503 Expired - Fee Related CN1109431C (en) | 1998-07-17 | 1999-04-09 | Asynchronous transfer mode turn-on device for public network |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103605410A (en) * | 2013-12-09 | 2014-02-26 | 山东华辰泰尔信息科技股份有限公司 | Backplane system capable of being configured to multiple architectures and application thereof |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1108043C (en) * | 1999-12-31 | 2003-05-07 | 西安交通大学 | Narrow-band and broad-band overall led-in equipment |
| CN100420217C (en) * | 2005-06-28 | 2008-09-17 | 华为技术有限公司 | Interframe interconnection communication system and data exchanging method thereof |
| CN101447885A (en) * | 2007-11-27 | 2009-06-03 | 华为技术有限公司 | Communication single-board, machine frame, communication single-board insert-pull detection system and communication system |
| US8285090B2 (en) * | 2010-03-19 | 2012-10-09 | Rockwell Automation Technologies, Inc. | Serial optical data transmission system with displaceable optical pathway |
| CN101895790A (en) * | 2010-07-22 | 2010-11-24 | 中兴通讯股份有限公司 | Method and device for laying out slot positions of SDH (synchronous digital hierarchy) apparatus |
| CN103200038B (en) * | 2013-04-26 | 2016-08-31 | 上海博达数据通信有限公司 | A kind of open multiple service platform |
| CN109257223A (en) * | 2018-09-29 | 2019-01-22 | 南京泰通科技股份有限公司 | High reliability real-time synchronization data processing equipment |
-
1999
- 1999-04-09 CN CN 99105503 patent/CN1109431C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103605410A (en) * | 2013-12-09 | 2014-02-26 | 山东华辰泰尔信息科技股份有限公司 | Backplane system capable of being configured to multiple architectures and application thereof |
| CN103605410B (en) * | 2013-12-09 | 2017-05-10 | 山东华辰泰尔信息科技股份有限公司 | Backplane system capable of being configured to multiple architectures and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1236256A (en) | 1999-11-24 |
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