CN202385092U

CN202385092U - Power communication platform integrating packet transport network (PTN) and Ethernet passive optical network (EPON)

Info

Publication number: CN202385092U
Application number: CN2011205245242U
Authority: CN
Inventors: 蒋小兵; 张健; 方精干; 张筱筠; 韩子媛
Original assignee: Hennan Electric Power Survey and Design Institute
Current assignee: Hennan Electric Power Survey and Design Institute
Priority date: 2011-12-15
Filing date: 2011-12-15
Publication date: 2012-08-15
Anticipated expiration: 2021-12-15

Abstract

The utility model relates to a power communication platform integrating a packet transport network (PTN) and an Ethernet passive optical network (EPON); an EPON module is added on PTN equipment, and passive optical network (PON) ports are added in the business interface of the PTN equipment; and all optical network units (ONUs) gather all business to the PON ports through a passive light splitting network, and are identified by the PTN equipment through the PON ports. The power communication platform integrating the PTN and the EPON has the advantages that: (1) the power communication platform is constructed by adopting the packet transport network, so that the packet business needs are adapted to, and bandwidth sharing can be realized more fully; (2) an EPON technology is applied on a distribution power grid communication level, a point-to-more-point structure meets the primary network topology of power distribution, and the purposes of realizing a passive network and saving filter core resources are achieved; (3) the PTN equipment and EPON equipment are integrated, so that the equipment cost is saved, simultaneously the needs for equipment installation positions, power supply and the like are reduced, and the technology is easy to realize; and (4) the merger of equipment reduces equipment fault points, so that unified network administration and equipment maintenance are more convenient to realize.

Description

A kind of power communication platform that merges PTN and EPON

Technical field

The utility model relates to a kind of power communication platform based on PTN technology and EPON technological incorporation.

Background technology

What the communication of power system transmission was generally adopted is SDH (SDH) technology.The SDH technology is a kind of connection-oriented circuit-switched technology, and it adopts time division multiplexing mode, and it is professional relatively to be fit to transmit traditional TDM.Along with the IPization of energy communication service, the shared proportion of data service is increasingly high, and the pattern of SDH fixed-bandwidth is with the demand of the following packetized traffic of incompatibility.

PTN (Packet Transport Network; Packet Transport Network) technology is meant an aspect is set between IP operation and bottom optical transmission medium; The requirement that transmits to the sudden and statistic multiplexing of Packet Service flow and designing realizes multiple service supporting to be grouped into kernel.The outlet of PTN technology has solved the packetized traffic transmission requirements, launches large-scale the application in China Mobile at present, and application is also just progressively carried out in electric power system.

EPON (Ethernet passive optical network) is a kind of novel Optical Access Network technology, and it adopts point to multipoint configuration, and the passive fiber transmission provides multiple business on Ethernet.This specific character of EPON is highly suitable in the power matching network communication and uses.National grid has progressively been carried out pilot at present and has been used.

Summary of the invention

The purpose of the utility model provides a kind of cost, the fusion PTN that saves resource and power communication platform of EPON practiced thrift.

The utility model increases the EPON module on PTN equipment, in PTN appliance services interface, increase the PON mouth; Each ONU converges to the PON mouth through passive splitting network with miscellaneous service, through the PON mouth by the PTN recognition of devices.

The advantage of the utility model is following:

1, adopts grouping conveying network to make up the power communication platform, adapt to the traffic packets demand, can more fully realize bandwidth sharing.

2, the EPON technology is applied to adapted communication system of power grids aspect, the structure of putting multiple spot meets adapted electricity primary network topology, reaches the purpose of passive network, saving fibre core resource.

3, PTN equipment and EPON equipment are united two into one, practiced thrift equipment cost, reduced demands such as equipment installation site, power supply simultaneously, and also be easy to technically realize.

4, the merging of equipment has reduced the equipment fault point, is convenient to unified webmaster and plant maintenance more.

Description of drawings

Fig. 1 is a PTN equipment work schematic diagram.

Fig. 2 is an EPON system composition diagram.

Fig. 3 realizes schematic diagram for the utility model function.

Fig. 4 is the utility model flow chart of data processing figure

Fig. 5 is the utility model network application figure.

Embodiment

The utility model combines PTN and two kinds of technology of EPON, and the two is blended among single complete equipment, and the multiservice interface that utilizes this equipment to provide is built unified power communication platform.

PTN equipment work principle: PTN can be divided into the Ethernet enhancement techniques and transmission technology combines two big types of MPLS, and the former is representative with PBB-TE, and the latter is representative with T-MPLS, and this programme is based on the latter.T-MPLS (Transport MPLS) is a kind of connection-oriented grouping tranmission techniques; In transmitting network; Client signal is shone upon into the MPLS frame and utilizes MPLS mechanism (for example label exchange, label stack) to transmit; It increases the basic function of transport layer simultaneously, for example connection and performance monitoring, survivability (protection recovers), management and chain of command (ASON/GMPLS).On the whole; T-MPLS has selected to help in the MPLS system some characteristics that data service transmits; Abandoned the complicated control protocol family of IETF (Internet Engineering Task Force), simplified datum plane, removed unnecessary forwarding and handled for the MPLS definition.Shown in accompanying drawing 1, PTN equipment comprises E1/STM-n with various local services; FE/GE, ATM stamp PW, the two-layer label of LSP through the payload encapsulation, mail to the opposite end via link layer and physical layer; In whole process of transmitting; Packet transmits with the form of dividing into groups, and each professional transfer path also can staticly be set, and just can recover initial data through a series of decapsulation again at receiving terminal.

EPON equipment work principle: a typical EPON system forms as shown in Figure 2 by OLT, ONU, POS.OLT centre machine room is equivalent to a switch or router, and a plurality of service ports such as FE/GE can be provided,, the PON interface towards passive optical-fiber network is provided simultaneously; ONU is placed on user side, is equivalent to a small switch, can FE be provided mouth to business side; The POS passive optical splitters is used for connecting OLT and a plurality of ONU, and its effect is the distribution downlink data, and concentrated upstream data.Use single-core fiber in the EPON system, upload at a core and serve descending two ripples (the 1550nm wavelength that can on this core, superpose in addition is used for transmitting anolog TV signals for up wavelength: 1310nm, downstream wavelength: 1490nm).

The utility model is fused into a kind of equipment with PTN and EPON equipment, and it realizes that principle is as shown in Figure 3.On PTN equipment, increase the EPON module, in PTN appliance services interface, increase the PON mouth.Each optical node ONU converges to the PON mouth through passive splitting network ODN with miscellaneous service, through the PON interface by the PTN recognition of devices.The data that PTN equipment receives the PON mouth are resolved the Ether frame of the standard of obtaining to the packet frame format through the OLT functional module.PTN can through distinctive encapsulation mechanism should business miscellaneous service is the same encapsulates with E1/STM-N, FE/GE, ATM etc.; NNI mails to the opposite end through the line side of PTN equipment, and this business is sent to professional receiving terminal as a kind of professional end to end path through setting in advance.In this programme, the EPON data exist as a kind of type of service, and the core exchange layer of this equipment still is transmitted as the basis with the PTN grouping.The communication process that possesses ONU equipment loaded service that the local PTN equipment of EPON function descended to hang and far-end main website is following, as shown in Figure 4:

1, the terminal traffic layer data gets into ONU through the Ethernet interface of ONU;

2, ONU is packaged into mac frame one by one with business datum, and adds the LLD sign, through data link layer and a series of processed of physical layer, forms the EPON code stream of standard, is sent to local PTN equipment through the ODN network;

3, local PTN equipment receives the EPON code stream through the PON mouth, through being integrated in the OLT module in the PTN equipment, code stream is resolved, and obtains the MAC layer data, then generates the PTN message through adding signs such as PW, LSP, and through PTN network destined main website end;

4, the code stream received of main website end PTN equipment interconnection is resolved, and obtains original MAC layer data, uploads local application layer.

With this equipment serves as that the basis combines the energy communication service demand, can set up the uniform communication transmission platform, as shown in Figure 4.

It is as shown in Figure 4 on the basis of this equipment, to make up unified power communication transmission platform.Backbone layer adopts 10GE PTN equipment in this scheme, and backbone layer looped network bandwidth is 10Gbit/s, and the backbone layer node can be located at the above transformer station of 220kV; Access Layer adopts GE PTN equipment, and the looped network bandwidth is 1Gbit/s, and the Access Layer node can be located at 110kV/35kV transformer station.The Access Layer node can adopt the PTN equipment that possesses the EPON function; This equipment can go out a plurality of PON mouths to each 10kV outlet direction; Through passive splitting network, cover devices such as each switching station, ring main unit, on-pole switch and distribution transforming, realize professional the uploading in real time of power distribution automation.

Claims

1. a power communication platform that merges PTN and EPON is characterized in that: on PTN equipment, increase the EPON module, in PTN appliance services interface, increase the PON mouth; Each ONU converges to the PON mouth through passive splitting network with miscellaneous service, through the PON mouth by the PTN recognition of devices.