CN1141546A - Mixed style comprehensive business connecting net work equipment and method for forming the net work - Google Patents

Abstract

This equipment includes optical-fiber circuit terminals, optical-fiber network unit and insertion net management system. According to the requirements of user, said equipment can use several media of ready-made optical fiber and metal wire, etc. to easily and selectively form the integrated service insertion net with topological structures of ring and/or star structure, chain and tree structure, etc.. As compared with existent FTTC net-forming mode, its net-forming mode is more flexible, and at the same time it implements three nets of telephone, data and image into one, and obviously reduces cost of circuit and running cost for maintenance repair management.

Description

The multi-service access node device of mixed style and network-building method thereof

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

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

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, and traditional copper network is difficult to satisfy business development requirements such as high-speed data communication, image.For adapting to ISDN and developing to information superhighway, need a kind of optoelectronic integration telecommunications networking plan and telecommunication system that the integrated network service is provided from existing telecommunications network.

At present, Access Network is still based on copper cable, the wireless access that certain scale is arranged, and FTTC and HFC optical fiber technology have been begun to use, 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 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 provides a kind of more flexible than existing FTTC networking mode at the above-mentioned shortcoming of prior art, business such as phone, data, image can be provided simultaneously, implement the "Three-in-One Network" and also can significantly reduce circuit fee usefulness, can significantly reduce the multi-service access node device and the network-building method thereof of the mixed style of regular maintenance administrative expenses.

For achieving the above object, mixed style multi-service access node device of the present invention mainly comprises: optical line terminal OLT, optical network unit ONU, also can comprise Access Network-Network Management System AN-NMS, described optical line terminal is by its corresponding interface and switch, the DDN net, simulation and/or digital CATV signal source, service provision points such as MPEG 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 OLT links to each other with optical network unit ONU by described optical fiber, can form annular, tree-like, star, architecture of a telecommunication networks such as chain.Described 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 ONU 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 light signal (OS), described business interface unit will be from described business interface (E1, T1, V5.x) signal of Laiing carries out code conversion, described time gas exchange net receives from the output signal of described business interface unit and the time gas exchange that will remove same ONU to one group of 2M signal, all the 2M handshaking that will remove same OSU simultaneously to 2M port that this OSU links to each other on.Described fiber optic service unit OSU is by forming from two same sections of described time gas exchange net reception same signal simultaneously, each part comprises the justification cell S AU that is used for adaptation rate, be connected with this justification unit and be used for the transmission Multi-connection unit MUL of synchronous multiplexing from the signal of SAU, be used to receive the output signal of described transmission Multi-connection unit 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 ONU comprises the trunk UFIU UMSC Fiber Interface Unit MIU that handles the both direction light signal simultaneously, and/or be used for the branched optical cable interface unit BIU of multiple connection and transforms electrical signals, be used for time slot allocation, user port control and with the subscriber unit of function such as subscriber line interface, built-in test and supervisory control system in order to intelligence test subscribers feeder and its internal electric equipment of monitoring and ambient condition, and finish protocol communication, agreement is explained and the protocol processing unit of carrying out function, be used to receive the CATV receiving element from the CATV light signal (OS) of described OLT, an end is connected to the optical splitter of this CATV receiving element.

The user can be according to business demand, utilize above-mentioned access network equipment of the present invention and the different connected modes of laying the optical fiber that maybe will lay and other transmission mediums, be constructed as follows the multi-service access node of different topology structure mixed style easily: the optical ring access net that does not contain the ONU of branch of trunk optical interface MIU, the optical ring access net of the band ONU of branch, the chain structure of tree network or the band ONU of branch, chain net; The tree-like composite web of encircling with the band ONU of branch.

Wherein, use the trunk ONU of band trunk optical interface MIU just can constitute to make equipment on the looped network to have self-healing ability not with the ring of light net of ONU branch.

Just can constitute the chain structure during complete with trunk ONU but not articulating, the MIU among the ONU on the end points of chain has two optical interfaces not connect optical fiber at this moment.

Adopt trunk ONU and the ONU of branch of band branched optical cable interface BIU just can constitute branch's topology simultaneously.

In loop configuration and chain structure, re-use branch's topology, just can constitute the loop configuration and the tree structure of band branch.When using a plurality of OSU simultaneously in an OLT, each 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 mixed state multi-service access node of the present invention just is: the advantage that not only combines HFC and FTTC: all (see table 1 for details than the present copper network that still accounts for maximum ratio of China is far better on performance and cost, 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, Access Network of the present invention, by in optical network unit ONU, providing V5 interface function, just can link to each other through the V5 interface with wireless local loop system, 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.

ONU in the access network equipment of the present invention has designed outdoor type ONU simultaneously, can place by roadside or the building, has saved the computer room construction investment.In a word, populous according to China, the post and telecommunications develop rapidly, annual new clothes number of users is huge, and the optical fiber amount of laying is big, seepage velocity is fast, characteristics such as developed regions and under-developed area difference are very big, the low cost of Access Network of the present invention, stronger adaptability, in the future all optical network can be developed into, present situation and future development needs that advantage such as broadband services has all adapted to China's post and telecommunications preferably can be easily expanded to from narrow band service.

Table 1

Project	The traditional copper gauze	Access Network 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	Hybrid network of the present invention
			Copper cash and mounting cost	0.6$/m * 2km * 2048 * 5=12,288k$	0.6$/m * 0.5kn * 2048 * 5=3,072K$
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	50 of the annual reduction of every line expense of maintenance and management $ can Jie Sheng $1000 hundred million in 20 years 100000000 subscribers feeders.

Now be described with reference to the accompanying drawings the embodiment of integrated service mixed type Access Network of the present invention.

Fig. 1 is the basic composition calcspar of an embodiment of mixed style 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 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 access network equipment of the present invention an example of the Fiber subscriber ring network that does not have the ONU of branch;

Fig. 7 represents to constitute with access network equipment of the present invention an example of recurrent network;

Fig. 8 is the Access Network example that constitutes branch's topological structure with access network equipment of the present invention.

Referring to Fig. 1, this illustrates the basic composition of an embodiment of mixed style Access Network of the present invention, as seen from the figure, this access network equipment mainly comprises optical line terminal (OLT) 101, optical network unit (ONU) 103, optical fiber link 102 and Access Network-Network Management System AN-NMS104, the ring of light net that is linked to be a band ONU of branch, wherein 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 (down with).With meet CCITT G.703 E1 interface and the DON net S2 of standard link to each other.Simultaneously, receive the video input signals VI from CATV signal source S3, signal VI can be simulation and/or numeral, vision signal.OLT101 draws two management interfaces: a RS232 interface connects local network management terminal 104; A Q3 interface is connected to Upper NM Station center TMN.OLT links to each other with ONU103 with optical fiber 102, and OLT and ONU103 can form annular, and the ONU on ring can also be with the ONU105 of branch.At each ONU 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, ONU can insert wireless local loop system WLL.The AN-NMS of local network management system links to each other with OLT101 with 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 terminal in this example.

Again referring to Fig. 2 as can be known, optical line terminal 101 comprises business (E1) interface unit 201, time gas exchange net 204, CATV optical sender 202, optical splitter 203, fiber optic service unit (OSU) 205 and network management unit (NMU) 206.

Wherein, CATV video input signals VI becomes light signal OS through CATV simulated light transmitter 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 ONU and/or the ONU of branch.E1 signal from the V5 interface enters time gas exchange net 204 to the NRZ signal that the HDB3 coded signal becomes 2048KHZ through the E1 interface unit; Also become the NRZ signal from the E1 signal of DDN interface and enter time gas exchange net 204 through E1 interface unit 201; The time gas exchange that handle removes same ONU in the time gas exchange net arrives the 2M that links to each other with this OSU to all 2M handshaking of removing same fiber optic service unit OSU205 simultaneously to one group of 2M signal.On the port; An OLT can comprise four fiber optic service unit OSU205, and OSU draws two pairs of optical fiber and several ONU are connected to form a subnet, and this subnet can be any with or without in the ring network of the ONU of branch, tree type network, the chain net.Both can also can on same optical fiber, transmit from the light signal of optical splitter output and the light signal of OSU output respectively with different Optical Fiber Transmission by wavelength division multiplexing.In OLT, also have a network management unit NMU206, NMU and CATV transmitter 202, OSU205 links to each other, and it is implemented monitoring and control, and NMU provides two management interfaces simultaneously: a RS232 interface connects local network management terminal LT; A Q3 interface is connected to Upper NM Station center MC.

Fig. 3 illustrates the concrete composition of fiber optic service unit OSU among Fig. 2.It is made up of identical two parts, these two parts receive identical 2048K signal from time gas exchange net 204 simultaneously, each 2048K signal through a justification cell S AU301 rate adapted to 2112K, be connected to then and send on the Multi-connection unit MUL302, in MUL302,28 2112K signals from SAU become on the 67.584M signal according to the given form synchronous multiplexing of the present invention, this 67.584M 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 2112K signals, each 2112K signal through a sign indicating number quick-recovery unit (SRU) 306 from 67.584M signal branch, signal rate is reduced to 2048K from 2112K, then, the 2048K signal that two parts receive is interconnected through three-state, outputs to time gas exchange net 204.

Ternary interlocking control signal is wherein produced by DEMUL305, receives that normal that part of to output to time gas exchange to the 2048K 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 2112K signal multiplexings use to the 67584M signal.

B1????B2????B3????B4????B5????B6????B7????H

B8????B9????B10???B11???B12???B13???B14???C1

B15???B16???B17???B18???B19???B20???B21???U

B22???B23???B24???B25???B26???B27???B28???C2

Wherein B1-B28 is 28 2112K 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, and 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 264K, GW is used for transmission network management information, and SP1, SP2, SP3 can be used as general data communication usefulness, does not use temporarily in native system.

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

The specific implementation of ONU such as Fig. 4, by this figure as seen, ONU mainly comprises following components: trunk optical interface (MIU) 401, branched optical cable interface (BIU) 402, 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 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 403 of ONU 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 ONU.Remaining 2M signal links to each other with each BIU, in BIU corresponding 2M signal multiplexing is got up, and becomes light signal again and exports on the optical fiber, links to each other with the corresponding ONU of branch.Protocol processing unit PPU403 one end links to each other with MIU, the other end and subscriber unit 404, and test cell 405, monitoring unit 406 links to each other, and finishes the explanation and execution function of protocol communication, agreement.Subscriber unit is finished time slot allocation, user port control, and with the function of subscriber line interface, subscriber unit links to each other with distributing frame with telephone wire, and Security Unit is arranged in the distributing frame, and the anti-lightning strike safeguard function of Denging is arranged, test cell 405 realization intelligent subscriber line test functions.

The optical fiber that enters the transmission CATV signal of ONU 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 ONU or the ONU of branch; By CATV receiving element 409 light signal is become the signal of telecommunication, through coaxial cable CL output CATV signal; In ONU, when the CATV signal power is not enough, optical splitter 203 can be moved to after the CATV receiving element 409 and between the two, set up a CATV transmitter unit, relay function is provided; Monitoring unit 406 and MIU, BJU, CATV unit etc. link to each other, and realize monitoring and management function to various device among the ONU.

In the Access Network 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 the OLT101 place, the E1 interface unit 201 of 2M signal through OLT 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 OSU205, in OSU through after the justification by synchronous multiplexing to the 67.584M high speed signal, become light signal through electro-optical conversion unit 303 again, can pass through wavelength division multiplexing, also can link on the ONU by optical fiber then without wavelength division multiplexing.Through not being the ONU place that this 2M signal will connect, under the MIU of this 2M signal in ONU do not intersected, but continued to be transferred to next ONU, up to its ONU that will connect in its MIU this 2M signal by under the interconnection, perhaps directly link protocol processing unit 403, perhaps link on the BIU402, in BIU, be multiplexed on the 67.584M high speed signal again, through electro-optical conversion is light signal, link on the ONU of branch by optical fiber, this signal is transformed to the 2M signal of telecommunication by BIU again and links protocol processing unit 403 on the ONU of branch, and 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 user to ONU, arrive OLT again, 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 only in some difference of processing at OLT place.In present device, OLT 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 OSU205, and later processing procedure is identical with the access processing procedure of telephone service.

Video business (containing the CATV business): at the OLT place, various video program source are linked on the input interface of the CATV transmitter among the OLT by coaxial cable, by CATV transmitter 202 it is become light signal OS, be divided into several through optical splitter 203, perhaps the light 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 ONU by optical fiber, on ONU, be divided into several, wherein one the road link on the CATV receiver of this ONU, become the signal of telecommunication by its light signal through optical splitter, output on the coaxial cable interface of ONU, the ONU that all the other several roads are transferred to other again goes.In ONU, when the CATV signal power is not enough, can after the CATV receiver, increase a CATV transmitter unit 410, relay function is provided.Video signal by ONU output is linked in the user family through a CATV coax network.

Fig. 6 to Fig. 8 is the example that present device is applied to three kinds of topological structures.Promptly as shown in Figure 6, when using the trunk optical interface, each ONU just can constitute the ring of light net of not being with ONU branch; As shown in Figure 7, each ONU uses trunk optical interface 401, but articulating just can not constitute the chain structure, and the MIU among the ONU on the end points of link has two optical interfaces not connect optical fiber at this moment; As shown in Figure 8, when the trunk that will have branched optical cable interface BIU and the ONU of branch are connected, just can constitute branch's topological structure.

When above-mentioned three kinds of structures are made up, just can constitute the loop configuration and the tree structure of band branch.When use a plurality of optical interface OSU simultaneously in an optical line terminal OLT, each optical interface can use different topological structures again, can constitute the multi-service access node of the mixed style of comprehensive several topology network architectures of while.

Though more than described mixed style multi-service access node of the present invention in conjunction with the embodiments and formed and network-building method; but obviously protection range of the present invention is not limited to these embodiment, but is determined by the claims that comprise all apparent changes that those skilled in the art may make.

Claims (18)

1, a kind of equipment that is used to constitute the multi-service access node of mixed style, this equipment mainly comprises: optical line terminal OLT (101), optical network unit ONU (103), described optical line terminal can pass through its corresponding service interface and miscellaneous service node (S1, S2, S3) link to each other, and provide to be connected to and be used for assignment, operation and manage the local network management system (104) of various functions of described Access Network and/or the interface of center webmaster (TMN), described optical line terminal (101) links to each other with the end of described ONU (103) by optical fiber link (102), and support described ONU (103,105) form annular and/or star, chain, tree-like networking structure, and described ONU (103,105) the other end passes through optical fiber link (102) with next stage ONU (105) and/or 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, described access network equipment as claimed in claim 1 is characterized in that: also comprise an Access Network-Network Management System (104).

3, access network equipment as claimed in claim 1 or 2 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).

4, access network equipment as claimed in claim 3, it is characterized in that: described optical line terminal OLT (101) comprises business interface unit (201), time gas exchange net (204) and an end link to each other with described time gas exchange net (204) and fiber optic service unit OSU (205) that the other end is connected with described ONU by optical fiber (102) and the CATV optical sender (202) that is used for video input signals (VI) is transformed into light signal (OS), described business interface unit will be from described business interface (E1, T1, V5.x) signal of Laiing carries out code conversion, described time gas exchange net 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 (PCM) signal, and all the described PCM handshaking that will remove same OSU (205) simultaneously are to the described PCM port that links to each other with this OSU.

5, access network equipment as claimed in claim 3, it is characterized in that: described optical network unit ONU (103) comprises the trunk UFIU UMSC Fiber Interface Unit MIU (401) that handles the both direction light signal simultaneously, and/or be used for the branched optical cable interface unit BIU (402) of multiple connection and transforms electrical signals, be used for time slot allocation, user port control and with the subscriber unit (404) of subscriber line interface etc., built-in test and supervisory control system (405 in order to intelligence test subscribers feeder and its internal electric equipment of monitoring and ambient condition, 406) and finish protocol communication, agreement is explained and the protocol processing unit (403) of carrying out 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.

6, access network equipment as claimed in claim 4 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 this justification unit and be used for the transmission Multi-connection unit MUL (302) of synchronous multiplexing from the signal of SAU, be used to receive the output signal of described transmission Multi-connection unit and it is become light signal and send to the electro-optical conversion unit (303) of optical fiber and have photoelectric conversion units (304) with above-mentioned each unit negative function, receive tap unit (305) and sign indicating number quick-recovery unit (306), and the triple gate of the described two parts same signal that interconnects is to export it on described time gas exchange net (204).

7, access network equipment as claimed in claim 4 is characterized in that: the code conversion that described business interface unit carries out is the two-way changing between HDB3 sign indicating number and the NRZ signal.

8, access network equipment as claimed in claim 5 is characterized in that: also comprise a CATV transmitter unit (410) as relaying, to adapt to the higher-wattage demand.

9, access network equipment as claimed in claim 6 is characterized in that: described reception tap unit (305) produces the control signal of triple gate, that part ofly can output to described time gas exchange net to the signal that receives normally to guarantee that synchronization has only to receive.

10, access network equipment as claimed in claim 6 is characterized in that:

The speed of described same signal is 2048K, described justification unit (301), be to 2112K with the 2048K rate adapted, described transmission Multi-connection unit (302) is that the signal of a plurality of 2112K is become the signal of 155M to 67.584M by the certain format synchronous multiplexing, and described sign indicating number quick-recovery unit (306) and described reception tap unit (305) are respectively the inverse process of said process.

11, access network equipment as claimed in claim 10 is characterized in that:

Described transmission Multi-connection unit is multiplexed to 67.584M by following frame structure:

B1???B2????B3?????B4?????B5?????B6?????B7????H

B8???B9????B10????B11????B12????B13????B14???C1

B15??B16???B17????B18????B19????B20????B21???U

B22??B23???B24????B25????B26????B27????B28???C2

Wherein B1-B28 is 28 2112K signals, and C1, C2 are the Error detection signals, and U signal keeps to usefulness in future, and 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), and GW, SP1, SP2, SP3 are the 264K signal,

GW is used for transmission network management information, SP1, and SP2, SP3 can be used for general data communication.

12, form the method for mixed style multi-service access node with the described equipment of the arbitrary claim of 5-11, this method may further comprise the steps:

Utilize ready-made optical fiber of having laid and/or the optical fiber that will lay and other transmission mediums to require to select the topological structure of this Access Network according to business demand and systematic function;

Determine that according to this topological structure the structure of described access network equipment finishes networking: when needs are selected ring network structure for use, then adopt the trunk ONU that only contains the trunk optical interface to form ring of light net.

13, form the method for mixed style multi-service access node with the arbitrary described equipment of claim 5～11, this method may further comprise the steps: utilize ready-made optical fiber of having laid and/or the optical fiber that will lay and other transmission mediums to require to select the topological structure of this Access Network according to business demand and systematic function;

Determine that according to this topological structure the structure of described access network equipment finishes networking: when selecting chain structure Access Network, then adopt the trunk ONU that only contains trunk optical interface (401), and articulating not.

14, form the method for mixed style multi-service access node as equipment as described in 5～11 arbitrary claims, this method comprises: utilize ready-made optical fiber of having laid and/or the optical fiber that will lay and other transmission mediums to require to select the topological structure of this Access Network according to business demand and systematic function;

Determine the different structure of described access network equipment according to this topological structure, finish networking: when selecting branch's topological structure, then will contain the trunk ONU of BIU and the branched optical cable interface BIU among the ONU of branch is formed by connecting.

15, as claim 12 as described in network-building method, it is characterized in that: described ring of light net is to make describedly to have self-healing function with equipment and adopt the looped network of at least two optical fiber.

16, as network-building method as described in the claim 12, it is characterized in that also comprising: utilize as described in claim 13 and form the method for branch's topological structure to constitute the ring of light net of band branch topological structure.

17, as network-building method as described in the claim 13, it is characterized in that also comprising: utilize as described in claim 13 and form the step of branch's topological structure to constitute the ring of light Access Network of tree topology.

18, the method for forming the mixed style multi-service access node with the described equipment of 5～11 arbitrary claims comprises that ready-made optical fiber that utilization has been laid and/or the optical fiber that will lay and other transmission mediums require to select the topological structure of this Access Network according to business demand and systematic function;

Determine that according to this topological structure the structure of described access network equipment finishes networking: in being chosen in same Access Network during combination different topology network configuration, then use a plurality of fiber optic service unit OSU in described OLT simultaneously, each described OSU can form the different topology structure with described ONU by the described method of claim 10～14 independently.

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