CN1980106A - Multi-business multiplexing method and optical transmitting system - Google Patents
Multi-business multiplexing method and optical transmitting system Download PDFInfo
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- CN1980106A CN1980106A CN 200510125858 CN200510125858A CN1980106A CN 1980106 A CN1980106 A CN 1980106A CN 200510125858 CN200510125858 CN 200510125858 CN 200510125858 A CN200510125858 A CN 200510125858A CN 1980106 A CN1980106 A CN 1980106A
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Abstract
Based on characteristic of service, the invention designs synchronous channels with different capacities. Each channel is able to diplex one route or multiple routes for service signal in same type. Except necessary adaptation in speed, service signal does not need additional process. Being framed and coded through synchronization channel, service signal can be transferred through optical path. The invention is able to diplex services in different granularities in high performance in order to guarantee transmission quality of each service. Features are: simple multiplexing procedure, single chip feasible, good economical efficiency, and high reliability.
Description
Technical field the present invention relates to a kind of optical transmission multiplexing method and system that supports that multi-service inserts.Belonging to light inserts and transmission technique field.
Background technology at present on the SDH network practices well of data services be that (link access protocol-SDH), GFP (Generic Framing Procedure), PPP tunnelings such as (peer-peer protocols) are mapped to data service in the SDH virtual container by LAPS.Multiservice transport platform MSTP is exactly a kind of platform that data service function is provided on SDH equipment by technology such as GFP, VC Virtual Concatenations.
The problem of MSTP existence at present is: 1. existing MSTP realizes the multi-service transmission based on SDH, and the block frame of SDH is made up of vertical 9 row and horizontal 270 row bytes.Placed section overhead and Administrative Unit Pointer in preceding 9 bytes of every row, its frame overhead just accounts for more than 3% of its total capacity, and a lot of expense does not have practical use.2. traditional SDH system adopts the fixing virtual container (VC) of bit capacity, and the signal that every kind of virtual container carries certain fixed rate comes transmit traffic data, has the not high problem of bandwidth availability ratio when data services.For example, when utilizing the ethernet signal of VC4 channel transfer 100Mb/s, bandwidth availability ratio has only 67%, and other 33% bandwidth is not utilized.3. the data service of existing MSTP will finally be converted into a plurality of VC4 or VC12 particle that SDH can handle according to complicated mapping, the location and multiplexing of regulation process of SDH, could transmit in the SDH network.This mode step is many, process is complicated, and mapping process need take expense.4. the VC particle that each FPDP is distributed among the existing MSTP is fixed, and can't dynamically adjust according to the actual flow of network.The minimal service interface capacity is 2M, can not directly support for low speed business more, and need add adaptation function, has therefore increased complexity, has strengthened cost.5. above-mentioned this Technology Need that 3., 4. determined selects for use a plurality of integrated circuit (IC) chip to realize different functions.From the basic composition of system, its design and realization cost are all higher, are difficult to popularize in the access network that economy is had relatively high expectations.
Summary of the invention the objective of the invention is to the above-mentioned shortcoming at prior art, provide a kind of economy, efficient, support the multiplexing method that multi-service inserts, and realize a kind of optical transmission system based on the method.
Basic principle of the present invention is to insert and the type of service of transmission and the needs of capacity, the speed of designed channel and quantity according to multi-service.Channel rate=service rate+redundant speed, redundancy section provide rate adapted and keep each passage synchronous.Rate adapted adopts the positive justification mode, and each passage forms integral multiple speed relation, and channel rate is as far as possible near service rate, and promptly redundant speed is as far as possible little.In addition, consider and further raise the efficiency and reduce the realization difficulty that each business is divided into groups according to its rate feature, and business on the same group is fitted in the same passage, to reduce the type of passage.The quantity of passage then can satisfy the type of service of required access and transmission and the needs of capacity.
The present invention is directed to business characteristic and design the synchronizing channel of a plurality of different capabilities, because each passage is a synchronized relation, therefore framing synchronously, formation is the frame structure of unit with the byte.Consider to simplify frame synchronization process, frame alignment signal and other system expense adopt a passage.
Whole multiplex process of the present invention has only rate adapted and synchronous two processes of framing, all are professional through the adaptive synchronizing channel that promptly enters into of first time rate, therefore complexity reduces greatly, can in monolithic integrated circuit chip, realize multi-business multiplexing, and the economy and the reliability that can the raising system realize.
Passage of the present invention is in case formation promptly comprises one or one group of business.Each passage is separate, and the service signal in the passage is also separate, is not subjected to the influence of other professional forms, speed, can guarantee professional conveying function and fail safe.
The present invention is owing to be adjusted at service signal various, different rates in its corresponding synchronous passage, and framing does not bring new expense except adding necessary frame alignment signal, and efficient all is improved during for realization variable grain degree service integration.
Description of drawings is below in conjunction with the drawings and specific embodiments, and the present invention is described in further detail.
Fig. 1 is an optical transmission system structural representation of the present invention;
Fig. 2 is multi-business multiplexing platform 150Mbit/s systematic functional structrue figure of the present invention.
Embodiment Fig. 1 is an optical transmission system schematic diagram of the present invention.Be divided into business interface module (101), multi-business multiplexing module (102), optical transceiver module (103) and physical link optical fiber from function.Interface module realizes the access of miscellaneous service, Multiplexing module carries out miscellaneous service multiplexing, by optical transceiver module the electrical signal conversion after multiplexing is become light signal, sends to then on the fibre circuit, do opposite conversion after arriving the other end, demultiplexing goes out miscellaneous service.
Multi-business multiplexing method of the present invention is based on multichannel technology, and the speed of every kind of business and data mode can have nothing in common with each other, and total transfer rate then can be selected based on the needs of volume of business.Actual design also should be considered device cost, should select general-purpose device.Here provided a kind of design and realization based on the 150Mbit/s system.
Fig. 2 is the functional structure chart of 150Mbit/s system.In the design, arrange 101Mbit/s (48 * 2112kbit/s), 25Mbit/s (12 * 2112kbit/s), three kinds of synchronizing channels of 2112kbit/s.The 100M Ethernet service enters Ethernet interface (label 201), through adaptive (label 206) admission passage 1 (101Mbit/s); 25M video information flow enters atm interface (label 202), through adaptive (label 207) admission passage 2 (25Mbit/s); The 2M data service enters E1 interface (label 203), through adaptive (label 208) admission passage 3 (2112kbit/s); N * 64 data services enter N * 64 interfaces (label 204), and the asynchronous serial data signal enters serial ports (label 205), can (label 209) admission passage 4 that both are together adaptive (2112kbit/s); Frame overhead (label 210) adopts a 2112kbit/s passage, comprises frame alignment signal and error monitoring, and this 2112kbit/s frame overhead passage also is responsible for transmitting monitoring, webmaster, switch and signal such as public affair.Make up these passages and insert frame overhead formation 150Mbit/s signal (label 211), adopt the scrambler mode during coding, can not cause that like this sign indicating number speed increases.
The frame overhead passage accounts for below 2% of total capacity (2.112 ÷ 150 * 100%=1.4%)
The efficient of each service integration of passage is as follows:
The expense of 100M Ethernet service=(2.112 * 48-100) ÷, 100 * 100%=1.376% ≈ 1.4%
÷ 2.048 * 100%=3.125% the ≈ 3.1% of the expense of 2M data service=(2.112-2.048)
Service integration efficient=(1-2.112/150) * 100%=98.6%
So, suppose that Ethernet service accounts for 2/3,2M service accounts for 1/3, so
Multiplexing efficient=(2/3 * 98.6%+1/3 * 96.9%) * 98.6% ≈ 96.7% that system is total
Even and traditional SDH all transmits E1 TDM business, professional transmission efficiency at most also can only reach 84%, if carry out that multi-service transmits then efficient is lower.
For the 600Mbit/s system, adopt said method can arrange 5 101Mbit/s passages and the following bandwidth channel of a plurality of 101Mbit/s, combining form can be various.
More high power capacity can be selected 1.25Gbit/s system or 2.5Gbit/s system, can provide the 1000Mbit/s passage to support G bit Ethernet service.
Claims (6)
1, a kind of multiplexing method of supporting that multi-service inserts is characterized in that designing at business characteristic the synchronizing channel of a plurality of different capabilities can efficiently carrying out the multiplexing of variable grain degree business.
2, the multiplexing method that said support multi-service inserts as claim 1, it is once adaptive to it is characterized in that every kind of business only needs, and can carry out synchronous multiplexing, and service signal does not need more multiprocessing except the interface rate of necessity is adaptive.
3, the multiplexing method that inserts as the said support multi-service of claim 1 is characterized in that the service signal that each passage can multiplexing one or more same-type.
4, the multiplexing method that said support multi-service inserts as claim 1 is characterized in that supporting simultaneously the access and the transmission of E1, asynchronous serial data and Ethernet service.
5, the multiplexing method that said support multi-service inserts as claim 1 is characterized in that realizing the multi-business multiplexing function in monolithic integrated circuit chip.
6, adopt as the optical transmission system of the multiplexing method realization that the said support multi-service of claim 1 inserts, it is characterized in that realizing the multi-business multiplexing and the optical transmission of multichannel E1, asynchronous serial data, linear speed 100M Ethernet.
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| CN 200510125858 CN1980106A (en) | 2005-12-02 | 2005-12-02 | Multi-business multiplexing method and optical transmitting system |
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| CN 200510125858 CN1980106A (en) | 2005-12-02 | 2005-12-02 | Multi-business multiplexing method and optical transmitting system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795274A (en) * | 2010-01-28 | 2010-08-04 | 中国电子科技集团公司第五十四研究所 | Routing device supporting safe multi-service multifunctional access |
| CN102916910A (en) * | 2012-11-01 | 2013-02-06 | 中国电子科技集团公司第五十四研究所 | Synchronous multiplexing method on basis of asynchronous system |
| US8462656B2 (en) | 2008-08-26 | 2013-06-11 | Huawei Technologies Co., Ltd. | Method and apparatus for multi-service adaptation and carriage |
| CN111628841A (en) * | 2020-05-20 | 2020-09-04 | 武汉东湖学院 | Method and system for realizing multi-service transmission clock synchronization |
| US11665087B2 (en) | 2021-09-15 | 2023-05-30 | International Business Machines Corporation | Transparent service-aware multi-path networking with a feature of multiplexing |
-
2005
- 2005-12-02 CN CN 200510125858 patent/CN1980106A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8462656B2 (en) | 2008-08-26 | 2013-06-11 | Huawei Technologies Co., Ltd. | Method and apparatus for multi-service adaptation and carriage |
| CN101795274A (en) * | 2010-01-28 | 2010-08-04 | 中国电子科技集团公司第五十四研究所 | Routing device supporting safe multi-service multifunctional access |
| CN101795274B (en) * | 2010-01-28 | 2016-03-30 | 中国电子科技集团公司第五十四研究所 | A kind ofly support safe multi-service multifunctional access routing apparatus |
| CN102916910A (en) * | 2012-11-01 | 2013-02-06 | 中国电子科技集团公司第五十四研究所 | Synchronous multiplexing method on basis of asynchronous system |
| CN102916910B (en) * | 2012-11-01 | 2015-04-15 | 中国电子科技集团公司第五十四研究所 | Synchronous multiplexing method on basis of asynchronous system |
| CN111628841A (en) * | 2020-05-20 | 2020-09-04 | 武汉东湖学院 | Method and system for realizing multi-service transmission clock synchronization |
| CN111628841B (en) * | 2020-05-20 | 2021-06-29 | 武汉东湖学院 | Method and system for realizing multi-service transmission clock synchronization |
| US11665087B2 (en) | 2021-09-15 | 2023-05-30 | International Business Machines Corporation | Transparent service-aware multi-path networking with a feature of multiplexing |
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Open date: 20070613 |