For explorationFTTxthe internetThe evolution and development direction of Jiangsu Telecom started in 2009.10G EPONFull performance test.In 2011, in order to further verify the current network application capabilities of 10G EPON, Jiangsu Telecom appointed Nanjing Telecom and Suzhou Telecom to carry out large-scale commercial use of 10G EPON. Nanjing Telecom conducted 30,000 lines in Xianlin campus of Nanjing University of Finance and Economics and Nanjing University of Posts and Telecommunications respectively. Scale of formal commercial use.

This live network application has verified the performance of all aspects of 10G EPON, and has accumulated more successful experience from network construction to service bearing and network management. The construction of two campus network projects is summarized as follows.

It only takes 2 months from design to opening

Simple construction and rapid business coverage. 10G EPON, as a smooth upgrade technology of EPON, completely inherits EPON’sODNThe basic principles of network and engineering design, the process and requirements of engineering construction are completely the same. The engineering designers and construction personnel are the original EPON engineering designers and construction personnel, and no special training is required. Nanjing University of Posts and Telecommunications, Nanjing University of Finance and Economics There are nearly 30,000 user ports in a campus network project. The project was completed in only two months from design to construction to opening, meeting the special requirements of the short construction period of campus network construction during the summer vacation of students.

Figure 1  10G EPON campus network architecture

Nanjing University of Finance and Economics Xianlin Campus Project,OLT use ZTE ZXA10 C300，ONUIt adopts the ZXA10 9806H equipment with the highest FE port density at present. The equipment can provide 64-port FE. The splitter adopts 1:32 splitting, and a single PON port can achieve 2048 user coverage.

The Xianlin campus project of Nanjing University of Finance and Economics has realized high-speed Internet access, VoIP,IPTVMulti-service bearer, and realizes the separation of campus intranet service and Internet public network service. On the basis of this network, Nanjing Telecom can quickly realize the construction of WLAN network, thus realizing the offload of mobile phone data service. Realize the telecommunications fixed network,wirelessThe rapid deployment of all services has seized the opportunity of campus network competition.

Bandwidth can fully meet actual needs

The high bandwidth and large splitting ratio of 10G EPON can fully meet the application scenarios with high user density. The Xianlin campus of Nanjing University of Finance and Economics and the Xianlin campus of Nanjing University of Posts and Telecommunications adopted a port coverage method for each student. The port density high. Students’ online behavior is mainly based on P2P file downloads and online video services, with high bandwidth requirements. The campus network service broadband port 4M speed, campus integrated service packages and other services can be increased to 8M according to demand in the future. The current network uses 64-port MDU equipment, the splitting ratio of the optical splitter is 1:32. According to the service concurrency rate of 70%, the actual bandwidth requirement of each PON is 4×64×32×0.7=5.6G, and the bandwidth of each user Can speed up to 6M. The high bandwidth and large splitting ratio of 10G EPON can meet the actual needs of the project.

At the same time, 10G EPON operation and maintenance is easy to open. 10G EPON completely inherits EPON's operation and maintenance management system and inherits the northbound of the existing networkinterface, Small changes. In August, with the support of the Provincial NOC Center, the docking test of 10G EPON and IPOSS was completed. The main contents include OLT TRAP alarm reporting, equipment resource collection, equipment port status collection,Optical module Data collection, etc.

Significant investment cost advantage

The overall cost of the entire project is low. In the construction of campus network projects, 10G EPON presents a good investment price ratio. The cost advantage is particularly prominent in the following two aspects.

In terms of equipment cost, the price of existing OLT equipment and MDU equipment is 10%~20% higher than that of EPON equipment. However, due to the large splitting ratio of 10G EPON, in Nanjing Telecom’s two campus network projects, compared with the EPON construction plan, PON port The number can be reduced from 115 ports to 28 PON ports, and MDU equipment from 890 units to 442 units. In the Nanjing Telecom campus network project, 10G EPON equipment purchase investment is reduced by 5% compared with EPON, and the wiring is considered comprehensivelyoptical fiber, Transfer box, MDU weak current box and other ancillary equipment, the proportion of cost saving will also expand.

On the other hand, it is reflected in the construction cost of ODN. At this stage, the optical module of 10G EPON uses PRX30,Optical powerThe budget is larger than that of EPON. Under the same construction mode, the splitting ratio is doubled, which effectively reduces the consumption of the backbone fiber and reduces the investment of the backbone pipeline to a certain extent. In the campus network project of Nanjing Telecom, the 10G EPON ODN investment Compared with EPON, it is reduced by nearly 15%.

The success of Nanjing Telecom’s 10G EPON large-scale commercialization has attracted great attention from the leaders of the group company. In October 2011, Wei Leping led a team to visit Nanjing University of Finance and Economics for an on-site inspection. He was concerned about the high traffic and large splitting ratio of 10G EPON in the FTTB construction model. The characteristics of simple construction and low overall construction cost are affirmed. The construction of two campus network projects of Nanjing Telecom has verified that the construction mode of 10G EPON FTTB is suitable for use in the three high scenarios of high user density, high activation rate and high bandwidth.