CN1053306C - Mixed style comprehensive business connecting net work equipment and method for forming the net work - Google Patents

Abstract

The present invention relates to a mixed type condensing service access network device and a networking method thereof. The device comprises an optical fiber line terminal (101), an optical network unit (103) and an access network management system (104). The device can utilize various media such as ready-made optical fiber, metal wires, etc., to conveniently select combined service access networks with the topology structures, such as ring shape, and/or star shape, chain shape, tree shape, etc., according to the requirements of users. Compared with the existing FTTC networking mode, the networking mode of the present invention is flexible. The present invention simultaneously realizes the three-network integration of telephones, data and images, and obviously reduces the line cost and the routine maintenance management expenses.

Description

A kind of multi-service access node and network-building method thereof

The application is be entitled as " the optical user annular comprehensive network " of the applicant in submission on July 13 nineteen ninety-five, application number is the subsequent application of 95108384 Chinese patent application, enjoy the priority of last application, so the application comprises this full content in first to file.

The present invention relates to the access network technology of field of telecommunications, more particularly, the present invention relates to have concurrently the Access Network and the network-building method thereof of integrated services such as phone, data and image.

The high speed development of telecommunications industry has proposed new demand and problem to networking.The topmost problem that has two aspects to cause on the one hand is that the expansion of the network capacity extension and covering space brings pipeline congested, constructional difficulties, and the number of having is wireless etc., and the user makes track investment very big to switch average line length, and the cable line maintenance cost is huge.On the other hand, the expansion of telecommunication service is broadband to communication network, synthesization proposes more and more higher requirement, traditional copper network is difficult to satisfy the highway development, needs a kind of optoelectronic integration telecommunications networking plan and telecommunication system that the integrated network service is provided.

At present, Access Network is still based on copper cable, the wireless access that certain scale is arranged, and begun to use Fiber To The Curb FTTC and Hybrid Fiber and Coax Network HFC HFC optical fiber technology, with regard to FTTC and HFC, though can overcome the many disadvantages that the above copper cable inserts, but with regard to technical performance, the characteristics that have following problem: HFC are that digital signal is modulated on the channel of cable TV CATV, number of users that each optical node is with is more to reach 500～2000, have insoluble noise funneling effect at optical node in the coax network of network interface unit NIU, speech quality is bad, and simply can not adapt to complicated topological structure because of network configuration.

Though FTTC can overcome these shortcomings of HFC preferably, optical node can less (64～500) from the nearlyer ring topology of realizing of user, the fatal shortcoming of FTTC is the transmission that can not realize simulating CATV.

Therefore, the objective of the invention is to above-mentioned shortcoming at prior art, provide a kind of more flexible than existing FTTC networking mode, business such as phone, data, image can be provided simultaneously, implement the "Three-in-One Network" and also can significantly reduce a kind of multi-service access node and the network-building method thereof of circuit fee usefulness, regular maintenance administrative expenses.

For achieving the above object, multi-service access node of the present invention mainly comprises: optical line terminal OLT, optical network unit master ONU, the ONU of optical network unit branch, also comprise Access Network-Network Management System N-NMS, described optical line terminal is by its corresponding interface and switch, numerical data DDN net, the CATV signal source, service provision points such as the professional MPEG of moving image link to each other, also can link to each other with described Access Network-Network Management System AN-NMS or link to each other by the centralized network management interface with other network management system, described optical line terminal OLT is by optical fiber and optical network unit master ONU, the ONU of branch links to each other, can form annular, tree-like, star, architecture of a telecommunication networks such as chain, described optical line terminal OLT comprises the business interface unit, time gas exchange net and the end fiber optic service unit OSU that the other end is connected with described master and the ONU of branch by optical fiber with described time gas exchange net is continuous, and the CATV optical sender that is used for video input signals (VI) is transformed into CATV light signal (OS), described business interface unit will be from described business interface (E1, T1, V5.x) signal of Laiing carries out a yard type exchange, described time gas exchange net receives from the output signal of described business interface unit and the time gas exchange that will remove same master and the ONU of branch to one group of 2M port, all the 2M handshaking that will remove same fiber optic service unit OSU simultaneously to 2M port that this fiber optic service unit OSU links to each other on.Described fiber optic service unit OSU is made up of two identical parts, they receive the same signal from the time gas exchange net, each part comprises the justification cell S AU that is used for adaptation rate, be connected with this justification cell S AU and be used for the transmission Multi-connection unit MUL of synchronous multiplexing from the SAU signal, be used to receive the output signal that sends Multi-connection unit MUL and it is become light signal and send to the electro-optical conversion unit of optical fiber and have photoelectric conversion units with above-mentioned each unit negative function, receive tap unit and sign indicating number quick-recovery unit, and the triple gate of the described two parts same signal that interconnects is to export it on described time gas exchange net.

Described optical network unit master ONU comprises the trunk UFIU UMSC Fiber Interface Unit MIU that handles the both direction light signal simultaneously, the branched optical cable interface unit BIU that is used for multiple connection and transforms electrical signals, be used for time slot allocation and to user port control and with the subscriber unit of subscriber line interface, built-in test macro in order to the intelligence test subscribers feeder, the built-in supervisory control system of monitoring internal electric equipment and ambient condition, finish protocol communication and agreement and explain and carry out the protocol processing unit of function, the optical splitter that reception is connected to this CATV receiving element from the CATV receiving element and an end of the CATV light signal (OS) of optical line terminal OLT.The difference of described optical network unit ONU of branch and main ONU is that it only comprises branched optical cable interface unit BIU (402) and does not comprise trunk UFIU UMSC Fiber Interface Unit MIU (401).

The user can be according to different business demands, the optical fiber that the utilization laying maybe will be laid and the different connected modes of other transmission mediums, by to trunk UFIU UMSC Fiber Interface Unit MIU among the optical network unit master ONU in the above-mentioned multi-service access node or branched optical cable interface unit BIU, the various combination of branched optical cable interface BIU among the ONU of branch uses, and can form annular, star, chain, different networking structures such as tree-like.

When selecting ring network structure for use, the trunk UFIU UMSC Fiber Interface Unit MIU among the optical network unit master ONU is connected, as only trunk UFIU UMSC Fiber Interface Unit MIU being connected, can form ring of light net with self-healing ability; When selecting the chain structure for use, trunk UFIU UMSC Fiber Interface Unit MIU connected but articulating not, promptly the trunk UFIU UMSC Fiber Interface Unit MIU among the optical network unit master ONU on the end points of chain has two optical interfaces not connect optical fiber; When selecting branched structure for use, the branched optical cable interface unit BIU among the ONU of optical network unit branch connected get final product.

In loop configuration and chain structure, re-use branch's topological structure, just can constitute the loop configuration and the tree structure of band branch.When in an optical line terminal OLT, using a plurality of fiber optic service unit OSU simultaneously, each fiber optic service unit OSU can connect the topological structure that uses above-mentioned distinct methods to form, and can be formed in the network configuration of comprehensive several topologys of while in the Access Network.

Therefore, the advantage of multi-service access node of the present invention and network-building method is: the advantage that not only combines HFC and FTTC, promptly on performance and cost, all (see table 1 for details than the present copper network that still accounts for maximum ratio of China is far better, table 2), and overcome the weak point of HFC and FTTC, can realize phone, in the time of integrated services such as data and simulation CATV image, can select optimal topological structure according to the different demands of user, have than existing FTTC net networking capability more flexibly, in addition, the present invention is by providing V5 interface function in optical network unit master and the ONU of branch, just can link to each other with wireless local loop system through the V5 interface, it is quick for installation thereby bring into play, flexibly, the incomparable advantage of wired system such as with low cost especially is fit to mountains and rivers, the river, the access of particular surroundingss such as outer suburbs.

Optical network unit master and the ONU of branch in the multi-service access node of the present invention have designed outdoor type ONU simultaneously, can place by roadside or the building, have saved the computer room construction investment.In a word, China is populous, the post and telecommunications develop rapidly, annual new clothes number of users is huge, the optical fiber amount of laying is big, seepage velocity fast, developed regions and under-developed area difference, thereby easily expand to advantages such as broadband services and the present invention has that cost is low, adaptability is strong and can develop into all optical network in the future, adapted to the present situation and the future development needs of China's post and telecommunications preferably from narrow band service.Table 1

Project	The traditional copper gauze	Multi-service access node of the present invention
			The scope of business and expansion	Be difficult to provide the broadband services business to be difficult to expansion	Can provide broadband services can make things convenient for expansion as required
Maintainable	Difference	Good
			Reliability	Difference	High
Confidentiality	Difference	Good
			Information quality	Generally	High
Useful life	Limited	For a long time
			Cost	High	Low
Professional dilatation and expansion are impacted net	Greatly	Little

Table 2

The items of cost	Copper wire access	Multi-service access node of the present invention
			Copper cash and mounting cost	0.6￥/m×2km×2048× 5＝12,288k￥	0.6￥/m×0.5km×2048× 5＝3,072k￥
Optical cable and mounting cost	3￥/m×4×20km＝240k￥	3￥/m×4×40km＝480k￥
			Switching equipment expense transmission cost house and air-conditioning expense	1k￥/ch×2048ch× 5＝10,240k￥ 100k￥×8＝800k￥ X	1k￥/ch×512ch+1.2k￥/ch ×9728ch＝12,186k￥ 100k￥×23＝2300k￥
Amount to	23,568k￥+X	18,038k￥
			Conclusion	With the copper wire access cost is radix	The annual reduction of every line Wei Huguanlifei $50 then can Jie Sheng $1000 hundred million in 20 years 100000000 subscribers feeders

Now be described with reference to the accompanying drawings the embodiment of multi-service access node of the present invention.

Fig. 1 is the basic composition calcspar of an embodiment of multi-service access node of the present invention; Fig. 2 is the schematic diagram of optical line terminal OLT among Fig. 1; Fig. 3 is the composition calcspar of the unit OSU of fiber optic service shown in Fig. 2;

Fig. 4 is the schematic diagram of the optical network unit master ONU among Fig. 1;

Fig. 5 is the composition calcspar of the trunk UFIU UMSC Fiber Interface Unit MIU among Fig. 4;

Fig. 6 represents to constitute with multi-service access node of the present invention an example of the Fiber subscriber ring network that does not have branched structure;

Fig. 7 represents to constitute with multi-service access node of the present invention an example of recurrent network;

Fig. 8 is an example that constitutes branch's topological structure with multi-service access node of the present invention.

Referring to Fig. 1, this illustrates the basic composition of an embodiment of multi-service access node of the present invention, as seen from the figure, this Access Network mainly comprises the AN-NMS104 of local network management system of optical line terminal OLT101, optical network unit master ONU103, optical fiber link 102 and this Access Network, the ring of light net that is linked to be a band branched structure, wherein optical line terminal OLT101 links to each other with switch S1 with the V5 interface, and this interface both can be the V5.1 interface, also V5.2 interface.The E1 interface that will meet the G.703 standard of overseas call telegram consultative committee (CCITT) definition links to each other with DDN net S2.Simultaneously, receive the video input signals VI from CATV signal source S3, signal VI can be the analog or digital vision signal.Optical line terminal OLT101 draws two management interfaces: a RS232 interface connects local network management system 104; A Q3 interface is connected to Upper NM Station center TMN.Optical line terminal OLT101 links to each other with optical network unit master ONU103 by optical fiber link 102 and carries out networking, can form ring network by the trunk optical interface MIU among the optical network unit master ONU103 is connected, can also go up the band branched structure by the ring that is connected simultaneously the branched optical cable interface BIU among the optical network unit master ONU103.At each optical network unit master ONU103 place, the telephone set by in the twisted-pair feeder L1 connection user family also connects user's computer or other data terminal by twisted-pair feeder L1, connects user's television set simultaneously by coaxial cable L2.When being provided with the V5.X interface, optical network unit master ONU103 place can insert wireless local loop system WLL.The AN-NMS104 of local network management system links to each other with optical line terminal OLT101 by the RS232 interface, and whole Fiber subscriber ring network is carried out maintenance and management.To illustrate herein,, in fact, also can utilize other network management systems to finish maintenance and management function whole Access Network though be provided with the local network management system in this example.

Referring to Fig. 2 as can be known, optical line terminal 101 comprises business interface unit 201, time gas exchange net 204, CATV optical sender 202, optical splitter 203, fiber optic service unit OSU205 and network management unit (NMU) 206.

Wherein, CATV video input signals VI becomes light signal OS through CATV optical sender 202, is divided into four the tunnel through optical splitter 203 again.Wherein one the road link other each road of CATV receiver (Fig. 4) and can meet next stage optical network unit master ONU103.E1 signal from the V5 interface is dealt into time gas exchange net 204 to the non-return-to-reference coding that High Density Bipolar 3 HDB3 signal becomes 2048KHZ through the E1 interface unit; Also become the NRZ signal from the E1 signal of DDN interface and be dealt into time gas exchange net 204 through business interface unit 201; In time gas exchange net 204 the time gas exchange of removing same optical network unit master ONU103 to one group of 2M signal, simultaneously all 2M handshaking of removing same fiber optic service unit OSU205 to 2M port that this fiber optic service unit OSU205 links to each other on; An optical line terminal OLT101 can comprise four fiber optic service unit OSU205, a fiber optic service unit OSU205 draws two pairs of optical fiber, be connected to form a subnet with several optical network units master ONU103, the ONU105 of branch, this subnet can be any in ring network, tree type network, the chain net.Both can also can on same optical fiber, transmit from the light signal of optical splitter 203 outputs and the light signal of fiber optic service unit OSU205 output respectively with different Optical Fiber Transmission by wavelength division multiplexing.In optical line terminal OLT101, also has a network management unit NMU206, NMU links to each other with CATV transmitter 202, fiber optic service unit OSU205, it is implemented monitoring and control, NMU provides two management interfaces simultaneously: a RS232 interface connects the AN-NMS104 of local network management system, and a Q3 interface is connected to Upper NM Station center TMN.

Fig. 3 illustrates the concrete composition of fiber optic service unit OSU205 among Fig. 2.It is made up of identical two parts, these two parts receive identical 2048Kbps signal from time gas exchange net 204 simultaneously, each 2048Kbps signal through a justification cell S AU301 rate adapted to 2112Kbps, be connected to then and send on the Multi-connection unit MUL302, in sending Multi-connection unit MUL302, from 28 2112Kbps signals of justification cell S AU301 according to the given form synchronous multiplexing of the present invention to the 67.584Mbps signal, this 67.584Mbps signal is linked on the electro-optical conversion unit E/O303 again, the signal of telecommunication is become light signal send on the optical fiber.On receive direction, light signal on the optical fiber changes the signal of telecommunication into through photoelectric conversion units O/E304, be sent to and receive tap cells D EMUL305, in DEMUL305, pick out 28 2112Kbps signals, each 2112Kbps signal through a sign indicating number quick-recovery unit (SRU) 306 from 67.584Mbps signal branch, signal rate is reduced to 2048Kbps from 2112Kbps, the 2048Kbps signal of two parts reception is interconnected through three-state then, outputs to time gas exchange net 204.

Ternary interlocking control signal wherein produces by receiving tap cells D EMUL305, receives that normal that part of to output to time gas exchange to the 2048Kbps signal that receives online, the self-healing function when realizing annular networking thus to guarantee that synchronization has only.

It below is the frame structure that 28 2112Kbps signal multiplexings use to the 67.584Mbps signal.B1 B2 B3 B4 B5 B6 B7 HB8 B9 B10 B11 B12 B13 B14 C1B15 B16 B17 B18 B19 B20 B21 UB22 B23 B24 B25 B26 B27 B28 C2

Wherein B1-B28 is 28 2112Kbps signals, and C1, C2 are the Error detection signals, and U signal keeps to using in the future.H is the compound frame synchronizing signal, it is constructed as follows: F1 GW F2 SP1 F3 SP2 F4 SP3 wherein F1F2F3F4 is frame alignment word (1001), GW, SP1, SP2, SP3 are the signal of 264Kbps, GW is used for transmission network management information, SP1, SP2, SP3 can be used for general data communication usefulness, do not use temporarily in native system.

By above frame structure as can be seen, each 2112Kbps signal has clear and definite position in frame structure, search frame synchronizing signal after, can position each 2112Kbps signal at an easy rate, carry out up and down road and interconnection and handle.

Specific implementation such as Fig. 4 of optical network unit master ONU103, by this figure as seen, optical network unit master ONU103 mainly comprises following components: trunk optical interface 401, branched optical cable interface BIU402, protocol processing unit (PPU) 403, subscriber unit 404, test cell 405, monitoring unit 406, distributing frame 407, optical splitter 203, CATV receiving element 409 and the CATV transmitter unit 410 that optionally is used for the CATV relaying.Trunk optical interface MIU is the optical fiber interface that is used for trunk (for branch), it can handle the signal on four optical fiber of both direction simultaneously, its inner realization: link to each other with frame synchronization control unit 502 after the light signal process photoelectricity of both direction, electrical optical converter 501 conversion as Fig. 5, in frame synchronization control unit 502, the frame synchronization process that sends and receive, generation is used to control cross-coupled timing and control signal SC.One group of register 503 is arranged in trunk UFIU UMSC Fiber Interface Unit MIU, and CPU element 504 is write road control data up and down in this register, control cross-coupled 2M signal about.Link to each other with the protocol processing unit PPU403 of optical network unit master ONU103 by one or two 2M signal in the 2M signal of cross-connection unit 505 outputs, be used for phone and the data communication of this optical network unit master ONU103.Remaining 2M signal links to each other with each branched optical cable interface BIU, in branched optical cable interface BIU corresponding 2M signal multiplexing is got up, and becomes light signal again and exports on the optical fiber, links to each other with corresponding optical network unit master ONU103.Protocol processing unit PPU403 one end links to each other with trunk UFIU UMSC Fiber Interface Unit MIU, and the other end links to each other with subscriber unit 404, test cell 405, monitoring unit 406, finishes the explanation and execution function of protocol communication, agreement.Subscriber unit finish the control of time slot allocation, user port and with the function of subscriber line interface, subscriber unit links to each other with distributing frame by telephone wire, Security Unit, safeguard function such as anti-lightning strike is arranged, test cell 405 realization subscriber line test functions in the distributing frame.

The optical fiber that enters the transmission CATV signal of optical network unit master ONU103 is at first linked optical splitter 203, is divided into several as required, wherein one the road links CATV receiving element 409, and remaining connects to next stage optical network unit master ONU103, the ONU105 of branch; By CATV receiving element 409 light signal is become the signal of telecommunication, through coaxial cable CL output CATV signal; In optical network unit master ONU103, the ONU105 of branch, when the CATV signal power is not enough, can between optical splitter 203 and CATV receiving element 409, set up a CATV transmitter unit, relay function is provided; Monitoring unit 406 links to each other with trunk UFIU UMSC Fiber Interface Unit MIU, branched optical cable interface BIU, CATV unit etc., realizes monitoring and management function to various device among optical network unit master ONU103, the ONU105 of branch.

In the multi-service access node of unification of three nets of the present invention, what realized is access function, promptly business is provided by switch, CATV center, video service centre, DDN net, and Access Network links to each other with them at access point, and the business that is provided by them is extended to from the very near place of user.The access process of phone shown in Figure 1, data and three kinds of business of video is described respectively below with reference to all accompanying drawings.

Telephone service: at optical line terminal OLT101 place, the E1 interface unit 201 of 2M signal through optical line terminal OLT101 from switch becomes the 2M signal of Transistor-Transistor Logic level, enter time gas exchange net 204, be switched in the pairing 2M output of corresponding fiber optic service unit OSU205, in fiber optic service unit OSU205 through after the justification by synchronous multiplexing to the 67.584M high speed signal, become light signal through electro-optical conversion unit E/O303 again, can pass through wavelength division multiplexing, also can be without wavelength division multiplexing, link on the optical network unit master ONU103 by optical fiber then, this signal is branched optical interface BIU again and is transformed to the 2M signal of telecommunication and links protocol processing unit 403 on optical network unit master ONU103, in protocol processing unit 403, this 2M signal is analyzed, handle, according to the protocol information that wherein carries, send control commands corresponding to subscriber unit, in subscriber unit, the user of appointment is linked on institute's distributed time slot, so far set up one from the user to optical network unit master ONU103 again to optical line terminal OLT101, arrive the access information path of switch at last, finish the access function of telephone service.

Data service: data service is divided into the professional and DDN business of ISDN, and the mode of the access of ISDN business is identical with telephone service.The access of DDN business is in some difference of processing at optical line terminal OLT101 place, in Access Network of the present invention, optical line terminal OLT101 links to each other with the DDN net with the 2M signal that meets the G703 standard, net next 2M signal after the conversion of E1 interface from DDN, after entering the time gas exchange net, wherein each passage (being time slot) is switched in the pairing 2M output of corresponding fiber optic service unit OSU205, and later processing procedure is identical with the access processing procedure of telephone service.

Video business (containing the CATV business): at optical line terminal OLT101 place, various video program source are linked on the input interface of the CATV transmitter 202 among the optical line terminal OLT101 by coaxial cable, by CATV transmitter 202 it is become light signal OS, be divided into several through optical splitter 203, perhaps the light earth signal through wavelength division multiplexing and telephone service transmits on an optical fiber, perhaps use an Optical Fiber Transmission separately, in a word, link on the optical network unit master ONU103 by optical fiber, on optical network unit master ONU103, be divided into several through optical splitter, wherein one the road link on the CATV receiver of this optical network unit master ONU103, become the signal of telecommunication by its light signal, output on the coaxial cable interface of optical network unit master ONU103, the optical network unit master ONU103 that all the other several roads are transferred to other again goes.In optical network unit master ONU103, when the CATV signal power is not enough, can after CATV receiver 409, increase a CATV transmitter unit 410, relay function is provided.Video signal by optical network unit master ONU103 output is linked in the user family through a CATV coax network.

Fig. 6 to Fig. 8 is the example that Access Network of the present invention is applied to three kinds of topological structures.Promptly as shown in Figure 6, when using trunk optical interface MIU401 to connect, each optical network unit master ONU103 just can constitute ring of light net; As shown in Figure 7, each optical network unit master ONU103 uses trunk optical interface MIU401 to connect, and the trunk UFIU UMSC Fiber Interface Unit MIU401 among the optical network unit master ONU103 on the auspicious point of link has two optical interfaces not connect optical fiber at this moment, just can constitute chain figure; As shown in Figure 8, each optical network unit master ONU103 uses branched optical cable interface BIU402 to connect, and just can constitute the net of branch's topological structure.

Above-mentioned three kinds of structures are made up, just can be constituted the loop configuration and the tree-structured network of band branch.When use a plurality of fiber optic service unit OSU205 simultaneously in an optical line terminal OLT, each fiber optic service unit OSU205 can use different topological structures again, can constitute the multi-service access node of comprehensive several topology network architectures of while.

In the scope of the present invention that claims limited, apparent this area professional can make various changes.

Claims (19)

1, a kind of multi-service access node, this Access Network comprises: optical line terminal OLT (101), optical fiber link (102), optical network unit ONU (103,105), it is characterized in that: described optical line terminal OLT (101) can pass through its corresponding service interface and miscellaneous service node (S1, S2, S3) link to each other, the interface that is connected to local network management system (104) and Upper NM Station center (TMN) also is provided, described optical network unit ONU (103,105) divide main ONU (103) and the ONU of branch (105), they can pass through user interface (v5), Radio Access Network (WLL) and different transmission medium (L1, L2, L3) with all kinds of service terminal (T1, T2, T3, T4) link to each other.

2, multi-service access node as claimed in claim 1 is characterized in that: described service node is switch (S1), DDN net (S2), video signal source (S3); Described transmission medium is twisted-pair feeder (L1), coaxial cable (L2), wireless (L3); Described service terminal is phone (T1), data terminal (T2), television set (T3) and wireless phone (T4).

3, multi-service access node as claimed in claim 1, it is characterized in that: described optical line terminal OLT (101) comprises business interface unit (201), time gas exchange net (204) link to each other with described time gas exchange net (204) with an end and the other end by optical fiber link (102) and described ONU (103,105) the fiber optic service unit OSU (205) of Lian Jieing, and the CATV optical sender (202) that is used for video input signals (VI) is transformed into CATV light signal (OS), described business interface unit (201) will be from described business interface (E1, T1, V5.x) signal of Laiing carries out code conversion, described time gas exchange net (204) receives from the signal of described business interface unit (201) and the time gas exchange that will remove same ONU to one group of pulse-code modulation (2M) signal, all the 2M handshaking that will remove same fiber optic service unit OSU (205) simultaneously to 2M port that this OSU (205) links to each other on.

4, multi-service access node as claimed in claim 1, it is characterized in that: described optical network unit master ONU (103) comprises the trunk UFIU UMSC Fiber Interface Unit MIU (401) that handles the both direction signal simultaneously, the branched optical cable interface unit BIU (402) that is used for multiple connection and transforms electrical signals, to time slot distribute and to user port control and with the subscriber unit (404) of subscribers feeder interfaces, built-in test cell (405) in order to test subscriber's line, monitor the built-in monitoring unit (406) of its internal electric equipment and ambient condition, finish protocol communication and agreement and explain and carry out the protocol processing unit (403) of function, be used to receive the CATV receiving element (409) from the CATV light signal (OS) of described OLT, an end is connected to the optical splitter (203) of this CATV receiving element.

5, multi-service access node as claimed in claim 1, it is characterized in that: the described optical network unit ONU of branch (105) compares with optical network unit master ONU (103), and difference is that the ONU of branch (105) only comprises branched optical cable interface unit BIU (402) and do not comprise trunk UFIU UMSC Fiber Interface Unit MIU (401).

6, multi-service access node as claimed in claim 3, it is characterized in that: described fiber optic service unit OSU (205) is by forming from two same sections of described time gas exchange net (204) reception same signal simultaneously, each part comprises the justification cell S AU (301) that is used for adaptation rate, be connected with SAU (301) and be used for the transmission Multi-connection unit MUL (302) of synchronous multiplexing from the signal of SAU (301), be used to receive the output signal of MUL (302) and it is become light signal and send to the electro-optical conversion unit E/O (303) of optical fiber and have photoelectric conversion units O/E (304) with above-mentioned each unit negative function, receive tap cells D EMUL (305) and yard quick-recovery cell S RU (306), and the described two parts same signal and export it triple gate of described time gas exchange net (204) to of interconnecting.

7, multi-service access node as claimed in claim 3 is characterized in that: the code conversion that described business interface unit (201) carries out is the two-way changing between HDB3 sign indicating number and the NRZ signal.

8, as claim 4 or 5 described multi-service access nodes, it is characterized in that: also comprise a CATV transmitter unit (410), to adapt to the higher-wattage demand as relaying.

9, multi-service access node as claimed in claim 6, it is characterized in that: described reception tap cells D EMUL (305) produces the control signal of triple gate, that part ofly can output to described time gas exchange net (204) to the signal that receives normally to guarantee that synchronization has only to receive.

10, multi-service access node as claimed in claim 6, it is characterized in that: the speed of described same signal is 2048Kbps, described justification cell S AU (301), be to 2112Kbps with the 2048Kbps rate adapted, described transmission Multi-connection unit MUL (302) becomes the signal of 67.584Mbps with the signal of a plurality of 2112Kbps by the certain format synchronous multiplexing, and described sign indicating number quick-recovery cell S RU (306) and described reception tap cells D EMUL (305) are respectively the inverse process of said process.

11, multi-service access node as claimed in claim 10, it is characterized in that: described transmission Multi-connection unit MUL (302) is multiplexed to 67.584Mbps by following frame structure: B1 B2 B3 B4 B5 B6 B7 HB8 B9 B10 B11 B12 B13 B14 C1B15 B16 B17 B18 B19 B20 B21 UB22 B23 B24 B25 B26 B27 B28 C2 wherein B1-B28 is 28 2112Kbps signals, C1, C2 is the Error detection signal, U signal keeps to using in the future, H is the compound frame synchronizing signal, described compound frame synchronizing signal is made of following: F1 GW F2 SP1 F3 SP2 F4 SP3 wherein F1F2F3F4 is frame alignment word (1001), GW is used for transmission network management information, SP1, SP2, SP3 can be used for general data communication.

12, a kind of method of above-mentioned multi-service access node being carried out networking, it is characterized in that:, can form annular, chain, branch shape, tree-like and mix the net of shape by the various combination of the branched optical cable interface unit BIU (402) among the trunk UFIU UMSC Fiber Interface Unit MIU (401) among the main ONU (103), branched optical cable interface unit BIU (402) and the ONU of branch (105) is connected.

13, network-building method as claimed in claim 12 is characterized in that: when needs are formed the loop configuration net, only adopt main ONU (103), only wherein trunk UFIU UMSC Fiber Interface Unit MIU (401) is connected, form ring of light net.

14, network-building method as claimed in claim 12, it is characterized in that: when needs are formed chain structure net, also only adopt main ONU (103), wherein trunk UFIU UMSC Fiber Interface Unit MIU (401) is connected, and the key light interface unit MIU (401) among the main ONU (103) on this moment link end points has two interfaces not connect optical fiber.

15, network-building method as claimed in claim 12 is characterized in that: when needs are formed the branched structure net, the branched optical cable interface unit BIU (402) among the main ONU (103) is connected with the interface unit BIU of branch (402) among the ONU of branch (105).

16, network-building method as claimed in claim 13 is characterized in that: described ring of light net adopts the looped network of at least two optical fiber, forms the ring of light net with self-healing function.

17, network-building method as claimed in claim 13 is characterized in that: the branched optical cable interface unit BIU (402) among the main ONU (103) is connected with the interface unit BIU of branch (402) among the ONU of branch (105), constitutes the ring of light net of band branched structure.

18, network-building method as claimed in claim 14 is characterized in that: the branched optical cable interface unit BIU (402) among the main ONU (103) is connected with the interface unit BIU of branch (402) among the ONU of branch (105), constitutes the net of tree topology.

19, as the described network-building method of claim 12 to 18, it is characterized in that: can use a plurality of fiber optic service unit OSU (205) simultaneously among the OLT in multi-service access node (101), each OSU (205) can be independently and described ONU (103,105) connect, thereby form the mixed style net.

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