CN104869481A

CN104869481A - DCN implementation mode for OTN equipment

Info

Publication number: CN104869481A
Application number: CN201510247000.6A
Authority: CN
Inventors: 谭澍; 周权
Original assignee: BEIJING ZHONGJING SYBO TECHNOLOGY Co Ltd
Current assignee: BEIJING ZHONGJING SYBO TECHNOLOGY Co Ltd
Priority date: 2015-05-13
Filing date: 2015-05-13
Publication date: 2015-08-26

Abstract

The invention relates to the technical field of OTN equipment, especially a DCN implementation mode for the OTN equipment. The implementation mode employs a router A, a router B, a router C, and an OTN node. A business flow between the router A and the router B and a business flow between the router A and the router C are packaged in an STM-64 POS interface in a unified manner. The OTN node employs the MPLS-TP technology to recognize an IP/MPLS tag in a router POS interface. The implementation mode is large in transmission capacity, is high in network safety, and is high in bearing efficiency.

Description

For the DCN implementation of OTN equipment

Technical field

The present invention relates to the technical field of OTN equipment, especially a kind of DCN implementation for OTN equipment.

Background technology

At present in metropolitan area network aspect, ip router generally all adopts fiber direct connection mode, but in order to the fail safe that improves network further and maintainability, IP network also can progressively be carried on transmission network, ites is desirable to provide protection in transportation level; In arterial grid aspect, IP network generally all adopts the networking mode of router+traditional WDM.From newly-increased primary transmission demand in recent years, broadband services accounts for more than 80%, and the broadband services bandwidth ratio that accounts for whole trunk bandwidth is in ascendant trend year by year, therefore ensures that the bandwidth demand of broadband services progressively becomes the main task of transmission network.

Along with communication network IPization and broadband propelling, transmission network will face following challenge:

A) challenge of transmission capacity.Along with the surge of IP operation amount in recent years, the heap(ed) capacity of IP layer router port reaches 40Gbit/s, is badly in need of wanting the transmit port of respective volume to match.With regard to router technology, with office to number of links mostly be 32 most, number of links cannot process more than 32 routers.The binding of many 10Gbit/s links can reduce the treatment effeciency of router.

B) challenge of internet security.The current protection for IP operation is all the protection of IP network aspect, and transportation level does not generally provide protection.For improving fail safe and the maintainability of network further, more and more higher reliability requirement is proposed to transmission network.

C) challenge of load-carrying efficiency.Due to the surge of IP operation amount, the router of IP layer is faced with huge dilatation and processing pressure, and cause its capacity, complexity and power consumption to improve constantly, P becomes equipment the most expensive in network.In many grades IP network (CE-PE-P-P-PE-CE), grouping bag will experience multi-hop from source to destination, thus result in a large amount of forwarding operations.Though these forwarding operations to this locality not " increment ", considerably increase router burden, network cost and equipment power dissipation are increased fast.

As shown in Figure 1, service distributing is carried out by the network planning, the business of router-A-C all needs through router B transfer, after the rational network planning, the service route router C of No. 1 port of router-A, the business of the service route router B of No. 2 ports, such router-A-C does not just need through router B transfer, thus significantly reduces the configuration requirement of router B.But the shortcoming of this thinking is, any change of flux and flow direction all may need to reconfigure transmission circuit.

Summary of the invention

The technical problem to be solved in the present invention is: in order to solve the prior art Problems existing in above-mentioned background technology, provides that a kind of transmission capacity is large, internet security is high and a kind of DCN implementation for OTN equipment that load-carrying efficiency is fast.

The technical solution adopted for the present invention to solve the technical problems is: a kind of DCN implementation for OTN equipment, there is router-A, router B, router C and OTN node, service traffics between described router-A and router B and the unification of the service traffics between router-A and router C are encapsulated in STM-64POS interface, and described OTN node identifies the IP/MPLS label in router POS interface by employing MPLS-TP technology.

Further restriction, the OTN node described in technique scheme by adopt MPLS-TP technology respectively adaptation be mapped in ODUK and transmit.

Further restriction, the service traffics between router-A and router C are led directly at photosphere by ODUK interleaving function by the router B described in technique scheme.

Further restriction, the router-A described in technique scheme, router B are identical with the specification of router C three.

Further restriction, the router that what the router-A described in technique scheme, router B and router C three all adopted is in simulator.

The invention has the beneficial effects as follows: this kind of DCN implementation for OTN equipment, by the OTN node intersected by means of support ODUK, and traffic identification between router and OTN and adaptive mapping techniques realize, it is made to have transmission capacity large, internet security is high, and the advantage that load-carrying efficiency is fast.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the present invention is further described.

Fig. 1 carries out service distributing schematic diagram by the network planning;

Fig. 2 is the schematic diagram that the present invention carries out service distributing.

Embodiment

In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present invention are described in a schematic way, and therefore it only shows the formation relevant with the present invention.

As shown in Figure 2, under traditional IP over WDM networking mode, because traditional wdm system does not possess wavelength and the long exchange capacity of wavelet flexibly, and router generally adopts STM-64 or STM-256 pos interface, when the service traffics (3Gbit/s) of A-C are less than Single wavelength capacity (10Gbit/s), usually the service traffics of A-B and A-C are configured on a router interface, and be fitted in a road wavelength signals by wdm system, therefore the straight-through of AC business cannot be realized in the WDM aspect of B node, still need by the forwarding of the router implementation A-C service traffics of B node.In order to realize the routing optimality of forwarding operation, must by means of supporting the OTN node that ODUK intersects, and the key technology such as traffic identification between router and OTN and adaptive mapping realizes.

A kind of DCN implementation for OTN equipment of the present invention, there is router-A, router B, router C and OTN node, service traffics between described router-A and router B and the unification of the service traffics between router-A and router C are encapsulated in STM-64POS interface, described OTN node identifies the IP/MPLS label in router POS interface by employing MPLS-TP technology, so that the service traffics distinguished between router-A and router B and the service traffics between router-A and router C.OTN node by adopt MPLS-TP technology respectively adaptation be mapped in ODUK and transmit.Service traffics between router-A and router C are led directly at photosphere by ODUK interleaving function by router B, thus reduce the configuration requirement to B node router capacity and line card.Router-A, router B are identical with the specification of router C three.The router that what router-A, router B and router C three all adopted is in simulator.

Having the following advantages of a kind of DCN implementation for OTN equipment of the present invention:

A) according to the technical characterstic of OTN and the real standard of current OTN equipment, suggestion adopts ring network structure to organize OTN as far as possible.Along with the continuous maturation of intellectual technology, when OTN Loading Control plane, OTN looped network can progressively to the transition of mesh network directional smoothing;

B) by the comparative analysis to the various protected mode of OTN, the OTN protected mode selection principle of proposition is: answer incorporation engineering concrete condition to consider 4 aspects such as network topology structure, business granule degree, service reliability requirement and protection cost to select suitable protected mode;

C) for the implementation of DCN, advise selecting ESC or OSC mode respectively according to the networking situation of engineering.Though but select which kind of mode, all advise on equipment, configure OSC veneer, be with outer DCN mode then to can be used as a kind of standby mode, to improve the fail safe of network;

D) in the ordinary course of things, OTN and existing SDH/MSTP, typical WDM systems adopt independence networking mode in suggestion.According to business granule degree size and security requirement, business can be carried on respectively on OTN system, existing SDH/MSTP system and traditional wdm system.From technical development angle, OTN will progressively replace traditional WDM, and SDH/MSTP and OTN will present the situation of long-term co-existence;

E) emphasis has inquired into the challenge that transmission network runs under communication network IPization and broadband overall background; and it is progressively ripe and commercial to think along with OTN resist technology and 40Gbit/s technology; IP network capacity requirement and reliability requirement can obtain satisfactory solution, and propose two kinds of basic resolving ideas for load-carrying efficiency problem.

With above-mentioned according to desirable embodiment of the present invention for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this invention technological thought, can carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification, must determine its technical scope according to right.

Claims

1. for the DCN implementation of OTN equipment, comprise router-A, router B, router C and OTN node, it is characterized in that: the service traffics between described router-A and router B and the unification of the service traffics between router-A and router C are encapsulated in STM-64POS interface, described OTN node identifies the IP/MPLS label in router POS interface by employing MPLS-TP technology.

2. the DCN implementation for OTN equipment according to claim 1, is characterized in that: described OTN node by adopt MPLS-TP technology respectively adaptation be mapped in ODUK and transmit.

3. the DCN implementation for OTN equipment according to claim 2, is characterized in that: the service traffics between router-A and router C are led directly at photosphere by ODUK interleaving function by described router B.

4. the DCN implementation for OTN equipment according to claim 3, is characterized in that: described router-A, router B are identical with the specification of router C three.

5. the DCN implementation for OTN equipment according to claim 4, is characterized in that: the router that what described router-A, router B and router C three all adopted is in simulator.