Notes on emerging technologies of optical fiber access networks

There are many things worth learning about the optical fiber access network. Here we will mainly introduce notes on emerging technologies of optical fiber access networks. At present, the world's optical fiber copper withdrawal has become a trend in the Construction of optical fiber access networks. The FTTx Access Network Based on PON technology not only needs to carry businesses with higher bandwidth, but also carries the great ideal of telecom operators in the HD era for fixed network restoration. Under the general trend of network convergence and business convergence, FTTx has experienced revolutionary technological innovation in terms of architecture, performance, business bearer, and O & M to adapt to the "Uniform" Operation Construction, future-oriented and automated green optical fiber access networks.

Multi-Service bearer capability

With the restructuring of operators, China's three basic telecom operators have implemented full-service operations. As the basic bearer network, the access network needs to carry voice, data, video, and even mobile base station return services. The complex historical reasons make traditional access networks form a "chimney" network structure of "One service construction one access network", which greatly increases the network construction and operation costs of operators, the introduction of optical fiber access network, its "large capacity, high access bandwidth, and multi-service QoS support capability" feature makes it possible to evolve the access network to a unified, integrated, and efficient bearer platform. For personal access, FTTx can provide a high-bandwidth HD video experience and meet the needs of enterprise users for high service quality assurance, high reliability, and high security, FTTx provides high-precision clock transmission and high-reliability optical fiber access network for mobile base station return services.

Large Capacity and wide coverage

Simplifying the network hierarchy and flattening the network is of great significance for the optical fiber access network with the largest number of nodes. At present, the construction method of "large capacity, few bureaus" has gradually become the mainstream method of optical fiber access network. "Large Capacity, small bureau" means that the number of users covered by the OLT increases, and new requirements are raised for the features of the OLT system capacity, backboard bandwidth, port density, and coverage distance, at present, there are large-capacity OLT devices in the industry, including 960G switching capacity, 40G bus, 8 PON ports, 10 Gbps uplink ports, and 60KM long-distance PON technology.

Multi-scenario access

In order to increase the rate of access services for users and adapt to the needs of the future broadband market and full-service market competition, the FTTx construction model of the optical fiber copper withdrawal has become the mainstream construction mode for access networks. It is a very complicated issue to see where fiber cables are going. You need to consider your bandwidth needs, existing access media, access point selection, data center, power supply, and O & M, regulatory Policies and many other factors. Therefore, carriers need an integrated and full-scenario FTTx solution that can meet the requirements of CO, FTTC, FTTB, and FTTH, FTTO and FTTM can also provide copper, P2P, and P2MP access.

High reliability

As the OLT capacity increases, the number of users covered increases, and it also carries enterprise-class optical fiber access networks, mobile bearer services, and other services. FTTx network reliability requirements are also increasing, for PON devices themselves, it is necessary to provide redundancy protection for important components of the OLT equipment (such as power supply board, main control board, upstream interface board, and even user interface board). In terms of networking protection, for important customers or key businesses, the OLT provides Type B and C protection on the line and upstream network layer protection to avoid spof and achieve reliable access. The end-to-end redundancy protection solution at the board, line, and network layers enables failover within 50 ms, providing users with a always-Online High-reliability business experience.

Automated deployment, O & M

With the advancement of optical copper withdrawal, the remote access nodes are getting closer to users. The number of nodes is dozens or hundreds of times higher, with diversified scenarios and more equipment types, as a result, the activation, configuration, and upgrade of devices are complicated. At the same time, the remote devices exit the data center, and the equipment running environment is poor and the failure rate increases. The equipment distribution is wide and the on-site troubleshooting workload is heavy. To address these problems, the traditional optical fiber access network equipment can no longer meet the requirements of FTTx network deployment and O & M. Only remote equipment can be plug-and-play, tested, and automatically distributed, A series of automated deployment and O & M functions such as remote automatic upgrade, automatic fault diagnosis, and automatic configuration of equipment can make large-scale deployment of FTTx networks possible.