CN1148897C - Optical branching board for SDH device of access network - Google Patents
Optical branching board for SDH device of access network Download PDFInfo
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- CN1148897C CN1148897C CNB991199332A CN99119933A CN1148897C CN 1148897 C CN1148897 C CN 1148897C CN B991199332 A CNB991199332 A CN B991199332A CN 99119933 A CN99119933 A CN 99119933A CN 1148897 C CN1148897 C CN 1148897C
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Abstract
The present invention provides an optical branching board for an SDH device of access networks, which has the advantages of strong network combining flexibility, strong network managing capability and low cost. The present invention comprises an input and output interface module of telecommunication bus, a branch processor, an overhead processor, a serial-parallel/parallel-serial converter, a device of clock recovery and synthesis, an photoelectric/electro-optical converter, a veneer controller and a processor of public service bytes and data communication channels, wherein a sending and receiving processing module is composed of the branch processor, the overhead processor, the serial-parallel/parallel-serial converter, the device of clock recovery and synthesis and the photoelectric/electro-optical converter, the sending and receiving processing module is connected with the input and output interface module of telecommunication bus and is switched in fiber channels through the photoelectric/electro-optical converter.
Description
Technical field
The present invention relates to a kind of optical branching board that is used for transmission equipment, relate in particular to a kind of optical branching board that is used for SDH (synchronous digital hierarchy) transmission equipment of Access Network.
Background technology
For the node for Access Network in communication system provides subfunction to strengthen the flexibility of networking, normally used method has: 1 uses SDXC (interconnection synchronously) equipment; 2 use the TM (terminating multiplexer) that contains ADM (add-drop multiplexer) equipment of SDXC or contain the SDXC function; 3 use ADM or TM equipment back-to-back; 4 use the optical branching board of PDH.These methods exist such as the cost height in actual use, capacity is low, optical interface is nonstandard and problem such as webmaster ability.For example the PDH optical branching board that uses at present because PDH technology itself is intrinsic, make that its optical branching board capacity is lower, and the webmaster ability is relatively poor.In addition, because regulating with respect to the PDH transmission, the SDH transmission system has very big advantage, so the range of application of SDH (synchronous digital hierarchy) transmission equipment in telecommunications network enlarged to Access Network by backbone network gradually in recent years.
Summary of the invention
The objective of the invention is to overcome above-mentioned shortcoming, a kind of optical branching board of the SDH of being used for Access Network transmission equipment is provided, it directly hangs on the telecom bus, has avoided coming the continued access branch road by the E1 interface.It has stronger networking flexibility, stronger webmaster ability, has lower cost again.
Optical branching board of the present invention comprises: telecom bus is sent into output interface module, is used for being used to provide the buffering of bus and the routing function of tributary unit at input direction, and the driving and the digital shaping feature of bus is provided at outbound course; Finger processor is used to finish the adjustment function of multi-frame and frame, and the assignment function of ascending time slot, and overhead processor is used for finishing in the uplink and downlink direction respectively the generation and the termination function of section overhead and high-order road expense; The string also/parallel to serial converter, be used for signal being carried out the conversion of serial-to-parallel form at up direction, signal is carried out the conversion of parallel-to-serial form at down direction; Clock Extraction and synthesizer are used at the signal extraction line clock of up direction to receiving from branched network, are that the signal that mails to branched network produces line clock at down direction simultaneously; Photoelectricity/electrical optical converter is used at up direction the light signal that receives from branched network being converted to the signal of telecommunication, is the electrical signal conversion that will send light signal at down direction simultaneously, and sends into optical fiber and transmit; Public affair byte and data communication channel processor, be used for extracting public affair byte and data communication channel content, the public affair byte and the data communication channel content that will mail to branched network added to position correct in the section overhead at down direction at the section overhead that up direction receives from branched network; The veneer controller, be used for being responsible for initialization, the operation relevant information of plate configuration, runnability detection and with the communicating by letter of SDH master board; One end of a wherein said finger processor is connected to an end of a described overhead processor; Described string also/two ends of parallel to serial converter are connected respectively to the other end of described overhead processor and an end of described Clock Extraction and synthesizer; The other end of described Clock Extraction and synthesizer is connected to an end of described photoelectricity/electrical optical converter, and they have constituted a cover transmitting-receiving processing module P; Described transmitting-receiving processing module P is connected with the telecom bus input/output interface module by finger processor, and by photoelectricity/electrical optical converter incoming fiber optic passage; Described public affair byte and data communication channel processor respectively with transmitting-receiving processing module P in overhead processor is connected and the connection of veneer controller, also have the interface that is connected with external circuit; Described veneer controller links to each other with overhead processor, telecom bus input/output interface module with finger processor respectively, and the interface that is connected with external circuit is arranged.
The structure of SDH optical branching board of the present invention has that networking flexibility is strong, the webmaster ability strong and advantage such as cost is lower.
Below with reference to accompanying drawings, by embodiment the present invention is described in further detail.
Description of drawings
Fig. 1 is the block diagram of SDH optical branching board according to an embodiment of the invention;
Fig. 2 is the block diagram of SDH optical branching board according to another embodiment of the invention;
Fig. 3 is the block diagram of SDH optical branching board according to still a further embodiment.
Embodiment
As shown in Figure 1, SDH optical branching board according to an embodiment of the invention comprises: telecom bus input/output interface module 1, finger processor 2, overhead processor 3, string also/parallel to serial converter 4, Clock Extraction and synthesizer 5, photoelectricity/electrical optical converter 6, public affair byte and data communication channel processor 7, veneer controller 8, wherein an end of finger processor 2 is connected to an end of overhead processor 3; String also/two ends of parallel to serial converter 4 are connected respectively to the other end of overhead processor 3 and an end of Clock Extraction and synthesizer 5; The other end of Clock Extraction and synthesizer 5 is connected to an end of photoelectricity/electrical optical converter 6, described finger processor 2, overhead processor 3, string also/parallel to serial converter 4, Clock Extraction and synthesizer 5, photoelectricity/electrical optical converter 6 constituted a cover transmitting-receiving processing module P; Transmitting-receiving processing module P is connected with telecom bus input/output interface module 1 by finger processor 2, and by photoelectricity/electrical optical converter 6 incoming fiber optic passages; Public affair byte and data communication channel processor 7 link to each other with overhead processor 3 among the transmitting-receiving processing module P, and are connected with veneer controller 8; Veneer controller 8 links to each other with overhead processor 3, telecom bus input/output interface module 1 with finger processor 2 respectively, and the interface that is connected with external circuit is arranged.
Telecom bus input/output interface module 1 is used for providing the buffering of bus and the routing function of tributary unit at input direction, the driving and the data shaping ability of bus are provided at outbound course, and 3 clock cycle of constant time lag of the timing ratio input signal of assurance output signal, to satisfy the requirement of telecom bus.
The string also/parallel-to-serial converter 4, carry out the conversion of serial-to-parallel form for the signal that receives from branched network, carry out the conversion of parallel-to-serial form for the signal that mails to branch.
Clock Extraction and synthesizer 5 are for the signal extraction line clock that receives from branched network; Produce line clock for the signal that mails to branched network simultaneously.
Photoelectricity/electrical optical converter 6 is converted to the signal of telecommunication to the light signal of receiving from branched network, simultaneously the serial electric signal that will send is changed into light signal, and sends into optical fiber and transmit.
Public affair byte and Data Communications Channel processor 7 extract public affair byte and data communication channel content from the section overhead that branched network receives, simultaneously the public affair byte and the data communication channel content that will mail to branched network are added to position correct in the section overhead.
The explained later signal is by the process of this SDH optical branching board.
The down direction that transmits to the branch subnet by major network at signal, the parallel input of signal of telecommunication telecom bus input/output interface module 1, through input overhead processor 3 after buffering and the Route Selection, form complete S DH frame format with section overhead and high-order overhead that 3 pairs of these signals of overhead processor produce, then input string also/parallel to serial converter 4.String also/parallel to serial converter 4 utilizes by Clock Extraction and synthesizer 5 high-frequency clock with the synthetic 155.520MHz of the low-speed clock of 19.44MHz, the serial data output that is 155M of the parallel SDH conversion of signals of overhead processor 3 outputs; At last data-signal is imported photoelectricity/electrical optical converter 6, be converted to light signal, be input in the optical fiber.
The up direction that transmits to major network by branched network at signal, the light signal of serial of 155Mb/s by input enters the photoelectricity/electrical optical converter 6 of transmitting-receiving processing module respectively, photoelectricity/electrical optical converter 6 is converted to the signal of telecommunication to the light signal of branch's subnet transmission, input clock extracts and synthesizer 5, Clock Extraction and synthesizer 5 extract the clock signal of circuit from the data-signal of input, and serial data stream carried out shaping, and the clock signal that extracts and the data-signal after the shaping all be transferred to string also/parallel to serial converter 4, string also/clock that parallel to serial converter 4 is extracted according to Clock Extraction and synthesizer 5, carry out the search frame locating information at data-signal, after the frame phase place of tracking lock signal the 155M serial signal is transformed to the parallel signal of 19.44Mb/s, output to overhead processor 3, overhead processor 3 extracts the expense in the data-signal, the signal and the timing signal that obtain are together imported finger processor 2, finger processor 2 will compare from the timing signal of overhead processor 3 inputs and the circuit timing signal of telecom bus, the data-signal of overhead processor being sent here according to result relatively carries out the pointer adjustment, make the frame phase place of the signal frame phase place of finger processor 2 output and multi-frame phase place and telecom bus and multi-frame phase alignment (wherein, by inner specific register is set, the time slot that can the assignment upstream data takies, for 63 branch road assignments arbitrarily), then the signal that obtains is sent into telecom bus input/output interface module 1, finish bus driver and data shaping function, and 3 clock cycle of constant time lag of the timing ratio downstream signal of assurance upward signal, make the requirement that meets telecom bus through the signal of up bus interface output.
In an alternative embodiment of the invention as shown in Figure 2, optical branching board also comprises debugging interface 9, is used for using for the debug system operation function, and it links to each other with veneer controller 8, and has the debug serial port that links to each other with external circuit.
In another embodiment of the present invention as shown in Figure 3; optical branching board also comprises another transmitting-receiving processing module Q; its structure and annexation are identical with transmitting-receiving processing module P in the optical branching board shown in Figure 1; and by photoelectricity/electrical optical converter 12 another optical-fibre channels of access, to realize the self-healed protection ring of branched network.In addition, in another embodiment of the present invention, transmitting-receiving processing module P also can insert another optical-fibre channel by photoelectricity/electrical optical converter 6, realizes multiple branches.
In addition, polylith circuit board of the present invention can be used simultaneously, so that a plurality of branches to be provided in same SDH equipment.
Claims (4)
1. optical branching board that is used for SDH device of access network is characterized in that comprising:
Telecom bus is sent into output interface module (1), is used for being used to provide the buffering of bus and the routing function of tributary unit at input direction, and the driving and the digital shaping feature of bus is provided at outbound course;
Finger processor (2) is used to finish the adjustment function of multi-frame and frame, and the assignment function of ascending branch channel time slot.
Overhead processor (3) is used for finishing in the uplink and downlink direction respectively the generation and the termination function of section overhead and high-order road expense;
The string also/parallel to serial converter (4), be used for signal being carried out the conversion of serial-to-parallel form at up direction, signal is carried out the conversion of parallel-to-serial form at down direction;
Clock Extraction and synthesizer (5) are used at the signal extraction line clock of up direction to receiving from branched network, are that the signal that mails to branched network produces line clock at down direction simultaneously;
Photoelectricity/electrical optical converter (6) is used at up direction the light signal that receives from branched network being converted to the signal of telecommunication, is the electrical signal conversion that will send light signal at down direction simultaneously, and sends into optical fiber and transmit;
Public affair byte and data communication channel processor (7); Be used for extracting public affair byte and data communication channel content, the public affair byte and the data communication channel content that will mail to branched network added to position correct in the section overhead at down direction at the section overhead that up direction receives from branched network;
Veneer controller (8), be used for being responsible for initialization, the operation relevant information of plate configuration, runnability detection and with the communicating by letter of SDH master board; Wherein
One end of described finger processor (2) is connected to an end of a described overhead processor (3); Described string also/two ends of parallel to serial converter (4) are connected respectively to the other end of described overhead processor (3) and an end of described Clock Extraction and synthesizer (5); The other end of described Clock Extraction and synthesizer (5) is connected to an end of described photoelectricity/electrical optical converter (6), finger processor (2), overhead processor (3), string also/parallel to serial converter (4), Clock Extraction and synthesizer (5) and photoelectricity/electrical optical converter (6) constituted a cover and received and dispatched processing module P; Described transmitting-receiving processing module P is connected with telecom bus input/output interface module (1) by finger processor (2), and by photoelectricity/electrical optical converter (6) incoming fiber optic passage; Described public affair byte and data communication channel processor (7) respectively with transmitting-receiving processing module P in overhead processor (3) is connected and veneer controller (8) connection; Described veneer controller (8) links to each other with overhead processor (3), telecom bus input/output interface module (1) with finger processor (2) respectively.
2. optical branching board as claimed in claim 1 is characterized in that also comprising debug communications interface (9), and described debug communications interface (9) links to each other with veneer controller (8), and has debug serial port and link to each other with external circuit.
3. optical branching board as claimed in claim 1 or 2 is characterized in that also comprising a cover and the structure and all identical transmitting-receiving processing module Q of connected mode that receive and dispatch processing module P.
4. optical branching board as claimed in claim 1 or 2, it is identical with transmitting-receiving processing module P to it is characterized in that also comprising a nested structure, but inserts optical-fibre channel another optical-fibre channel inequality that is inserted with transmitting-receiving processing module P by photoelectricity/electrical optical converter (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991199332A CN1148897C (en) | 1999-10-29 | 1999-10-29 | Optical branching board for SDH device of access network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991199332A CN1148897C (en) | 1999-10-29 | 1999-10-29 | Optical branching board for SDH device of access network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1303185A CN1303185A (en) | 2001-07-11 |
| CN1148897C true CN1148897C (en) | 2004-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991199332A Expired - Lifetime CN1148897C (en) | 1999-10-29 | 1999-10-29 | Optical branching board for SDH device of access network |
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| Country | Link |
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| CN (1) | CN1148897C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1323497C (en) * | 2002-07-30 | 2007-06-27 | 中兴通讯股份有限公司 | Manual business arrangement of connection oriented in optical transmission network |
| CN100336340C (en) * | 2003-06-24 | 2007-09-05 | 中兴通讯股份有限公司 | Multi-channel network management apparatus and method for transmission equipment |
| CN1328861C (en) * | 2003-12-31 | 2007-07-25 | 中兴通讯股份有限公司 | Digital interface circuit in light synchronous digit transmission system and its data demultiplexing method |
| CN100589352C (en) | 2004-02-04 | 2010-02-10 | 华为技术有限公司 | Method and apparatus for treating system expenses |
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1999
- 1999-10-29 CN CNB991199332A patent/CN1148897C/en not_active Expired - Lifetime
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| CN1303185A (en) | 2001-07-11 |
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Owner name: SHANGHAI ALCATEL-LUCENT CO., LTD. Free format text: FORMER NAME: BEIER AERKATE CO., LTD., SHANGHAI Owner name: BEIER AERKATE CO., LTD., SHANGHAI Free format text: FORMER NAME: BELL CO.,LTD., SHANGHAI |
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Address after: 201206, Nanjing Road, Jinqiao, Shanghai, Pudong, Nanjing Road, 388 degrees Patentee after: ALCATEL-LUCENT SHANGHAI BELL Co.,Ltd. Address before: 201206, Nanjing Road, Jinqiao, Shanghai, Pudong, Nanjing Road, 388 degrees Patentee before: Shanghai Bell Alcatel Co.,Ltd. Address after: 201206, Nanjing Road, Jinqiao, Shanghai, Pudong, Nanjing Road, 388 degrees Patentee after: Shanghai Bell Alcatel Co.,Ltd. Address before: 201206, Nanjing Road, Jinqiao, Shanghai, Pudong, Nanjing Road, 388 degrees Patentee before: Shanghai Bell Co.,Ltd. |
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Address after: 201206 No. 388 Nanjing Road, Jinqiao Development Zone, Shanghai, Pudong Patentee after: NOKIA SHANGHAI BELL Co.,Ltd. Address before: 201206, Nanjing Road, Jinqiao, Shanghai, Pudong, Nanjing Road, 388 degrees Patentee before: ALCATEL-LUCENT SHANGHAI BELL Co.,Ltd. |
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Granted publication date: 20040505 |
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