Kaidexing

Tel：400-110-9708

Fax：86(010)-82719489-806

Mail：kdx@cnkdx.com , cnkdx@126.com

Web：http://www.cnkdx.com

Add：1221/1245, Building A, Building 1, Jiayuan East District, Qinghe, Haidian District, Beijing

Solutions | 2013-05-03 08:24

At present，access network is facing a series of revolution and challenge of technology and business model. The

change of user's business demand and industry integration bring new competitive situation. Traditional telecom

operators adopt ADSL or LAN access, but for the new business requirements, the traditional way can't meet, and

the cost of network transformation is high. As a radio and television network operator, how to build Setting up a

new access network, which has the ability to carry out multi services and has the potential of network expansion,

should be seriously considered in the current network construction. Only by building the basic network which can

meet the future multi service needs, can we obtain the development opportunity in the new market competition

environment.

At present, there are two directions for the development of communication network. One is the development

trend of all-optical network in the transmission layer. From ASON technology in the core layer to FTTP technology

in the access layer, all indicate the evolution of network bearer to optical; the other is the business integration with

IP as the core. The development of Internet makes IP become the most ideal service carrying protocol. MSTP, RPR,

MPLS and other technologies are all traditional transmission networks The rapid development of IPTV and VoIP

also indicates the development direction of IP Bearer. The network construction of access network system should

grasp the development trend of technology and market, and choose reasonable technology to build access

network.

As a new access network technology, EPON is very suitable for the construction of optical access

network (FTTB / FTTH). From the perspective of operators, the passive characteristics can reduce the construction,

management and operation costs, improve the rate of return on investment and increase new profit opportunities;

the architecture of EPON network is very suitable for access network construction, so that operators can carry out

business quickly and effectively and easily Network expansion; the high bandwidth provided by e-pon will meet

the users' increasing demand for network bandwidth, so that operators can have reliable network resources to

carry out multiple services; EPON network has good compatibility and can be well integrated with existing

networks; EPON not only provides the above advantages, but also has the incomparable economy of other FTTx

technologies, which can reduce investment and long-term construction Design cost.

Requirement description

Data access network is deployed in a residential area, providing data access service and telephone service in the

initial stage, and preparing for IPTV. When the time is ripe, IPTV service will be provided to customers to provide

high-quality network service.

There are 248 buildings in 7 bid sections in the community, including 690 household units and 9108 households in

total. In addition, there are several commercial, school and office buildings. In the initial stage, broadband Internet

service is provided for users first, and then IPTV, VoIP and other data value-added services are needed in the later

stage. In this scheme, the access of households is mainly considered, and the businesses, schools and institutions

will be adjusted according to the actual situation in the future.

The built network can provide enough bandwidth to achieve high-quality data access services and IPTV streaming

media services. The network should have good expansion and upgrading capabilities, and can effectively support

the business requirements of three networks in one in the future.

The services supported by optical fiber access network include:

Internet access: it provides ordinary Internet access, and has sufficient bandwidth guarantee for browsing pages,

uploading and downloading common applications.

VoIP: NGN for the future, providing network telephone service.

IPTV / VOD: it can realize various unicast or multicast video services, including IPTV service in PC or set-top box

mode and video on demand (VOD) service.

Scheme of broadband access network in residential area

Based on the data security and availability of the QoS and video service of the kdonx350 series, this paper

proposes a solution based on the QoS, data security and scalability of the kdonx350.

Network topology

There are 248 buildings in 7 bid sections in the community, including 690 household units and 9108 households in

total. In addition, there are several commercial, school and office buildings. Due to the large number of buildings

in the community, the access of residents is mainly considered in this scheme, and the access problems of

Commerce, schools and institutions in the later stage can be adjusted according to the actual situation.

OLT configuration scheme at office

Considering that the total number of users in the community is large, the design adopts olt2550, which is a 10u

design, plug-in card structure, and is planned to be installed in the central computer room of the community. The

full configuration of the equipment can provide 28 downlink PON optical ports and 28 uplink Ge ports. The OLT

can provide a maximum access capacity of 28gbps. It can meet the needs of broadband access and IPTV service in

the future.

PON ODN network scheme

The OLT of the project center is installed in the community, so the primary optical splitter is adopted, and

the 1:16 splitter is adopted. The optical splitter is considered to be buried in the ground or in the optical junction

box in the community. The optical fiber of the splitter comes out to the building and forms an end in the building

installation box. The number of fiber cores is configured according to the number of onu3346 configured for the

number of households in the building. Each onu3346 is equipped with 2 fiber cores (1 core for main use and 1

core for standby). For multi building buildings, two buildings share one onu3346, optical fiber to building 1, and

building 2 to use class 5 line directly through the pipe.

ONU deployment scheme

The initial goal of the work is to provide data access services for customers, and the later goal is to provide

customers with IPTV and IP value-added services. In line with the principle of practicality and economy, it plans to

deploy FTTB with Sonia onu3346, fiber to the building, wall mounted connector box, built-in onu3346, onu3346

out of class 5 lines to the user's home. Onu3346 is a 24fe interface client, which is a high-density and economical

client.

Extended access scheme

EPON system has good scalability, as long as the current network planning for the community, add splitter / board

card and other equipment, it can easily and quickly realize the expansion of the network, and will not have any

impact on the existing services. For example, for this scheme, FTTH (optical fiber to home) access can be provided

to some high-end customers in the community, and the peripheral customers can be quickly accessed (only the

optical fiber between the optical splitter and the user can be deployed).

As there is no specific requirement at present, this scheme will not be designed and configured in this way. It can

be planned after further communication according to specific requirements.

Features and advantages of the scheme

Using kdxepon platform can fully realize the design goal of data access network, which is very suitable for the

requirements of this scheme. From the above network design, we can see the main advantages of EPON as a data

access solution: the logical structure of the point to multipoint network topology is star connection, that is, each

ONU is directly connected to the office equipment to avoid the unbalanced network structure, Compared with the

traditional point-to-point or ring-shaped network, it has stronger access ability and expansion ability, and can

save a lot of trunk optical fiber and reduce investment. From the management point of view, using a set of central

management system to manage the whole network can avoid the shortcomings of poor management ability and

separate management of traditional access network. At the same time, it can manage the ONU port, which

provides great convenience for maintenance and troubleshooting. From the point of view of maintenance, passive

optical network uses passive components, which greatly reduces network failure points and supporting facilities

of peripheral computer rooms. From the perspective of network construction, EPON platform can achieve phased

investment, gradually expand the capacity in the process of operation, without wasting any resources and

increasing the rate of return on investment. From the perspective of operator market competition, with the rapid

deployment and expansion of kdx2000 platform, operators can meet the needs of users faster and more flexibly.

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Beijing KDX Electronic Information Technology Co., Ltd., is located in Beijing's Haidian High-tech Development Zone, Company comprehensive modern new energy technology and optical fiber communication technology, is committed to in optical transmission system and image coding device and an operation and maintenance system technology and equipment research and production...

Tel：400-110-9708

Fax：86(010)-82719489-806

Website：http://www.cnkdx.com

Mail：kdx@cnkdx.com , cnkdx@126.com

Add：1221/1245, Building A, Building 1, Jiayuan East District, Qinghe, Haidian District, Beijing