The letter EoC promotes the two-way transformation of the power grid

Under the current background of the development of triple play, telecom operators are making every effort to build FTTH networks, which have formed great advantages in terms of network bandwidth, reliability, and transmission quality. In contrast, a coaxial cable network with more than 200 million user coverage will face more problems and greater pressure if it wants to successfully complete the transformation.

On the one hand, coaxial cables have good characteristics such as wide frequency, high bandwidth, low interference, and high coverage. How to make full use of the advantages of existing networks to maximize the utilization of coaxial networks has always been Radio and television operators urgently need to solve the issues. On the other hand, due to the lack of guiding reform programs and unified technical standards formulated by authoritative organizations before the implementation of network transformation, and the differences in the network structure and transformation conditions of the local and regional radio and TV networks at all levels, there are many types of The implementation plan of the two-way reconstruction of the wide grid and the corresponding access technology, and this situation undoubtedly increases the complexity of the network transformation.

As far as the transformation plan is concerned, currently the two-way transformation plan of transmission network adopted by Radio and TV is mainly divided into three types: CMTS+CM, EPON+LAN and EPON+EOC based on DOCSIS standard.

The CMTS+CM model is a classic technology system that makes full use of the advantages of the cable network resources in the radio and television HFC network. It is widely used in Europe and the United States and China's radio and television networks. However, with the trend of “brilliance into copper”, the long-distance transmission advantages of CMTS+CM over coaxial cable are no longer obvious. At the same time, the continuous increase in bandwidth requirements of users and the fact that the current status of residential density in cities in China makes the CMTS have low bandwidth and limited bearable services are gradually enlarged. In addition, the CMTS+CM scheme is prone to noise aggregation in practical applications, which affects the bandwidth and performance of the system. At the same time, the CMTS+CM solution requires high quality of coaxial cables and connectors, which significantly increases the cost of bidirectional transformation of cable television networks. Based on the above reasons, CMTS + CM program is difficult to become China's mainstream two-way network transformation program.

The EPON+LAN approach has been used by telecom operators on a large scale in telecommunication networks. For the broadband network, it does not occupy the frequency resources of the coaxial cable and will form a two-network model. However, from the current situation of radio and television, this type of networking requires a lot of network re-building, the input will increase, and the issue of radio and television funding has not yet been effectively resolved, it is not suitable for large-scale adoption.

The access mode of EPON+EOC utilizes the low cost of EPON equipment first, the cost of metropolitan area reconstruction is low, and the uplink and downlink networks of radio and television can be effectively combined. The most important feature of this mode is to solve the problem of re-routing, and can carry high-bandwidth services to meet the needs of cable TV users for comprehensive multimedia services such as data services, VOD, and interactive TV, and have been widely adopted.

At present, the mainstream EoC technologies are divided into two major categories: passive EoC and active EoC, including Home-Plug AV, WiFi frequency reduction, C-DOCSIS, MoCA, ECAN, EPOC, and HiNoC. A variety of alternative technologies have greatly increased the adaptability of EoC, but at the same time it has brought a problem. Can different technical solutions achieve the expected performance specifications after implementation? How to verify that the technical solution meets the relevant requirements?

For this type of problem, XinTaiTechnologies has a comprehensive set of common test solutions for EoC devices, which can be used to detect and verify the system performance, management capabilities, and networking capabilities of different EoC access solutions on the packet data side. A series of key indicators.

This test plan can be implemented based on the BigTao test platform or the iTester test platform. Transmission of 6 analog TV signals and 80 digital TV signals in CATV simulation network. Combined with man-made interference sources, various EoC networks can be fully tested. Validation includes data transmission bandwidth, various types of system delay, and packet loss rate. , broadcast packet/unknown packet suppression, VLAN function, DBA, IGMP function and other aspects of performance and function indicators. At the same time, in addition to the above-mentioned universal test plan, for certain special EoC system test requirements, XinTaiTechnology can also provide tailored test plan customization to fully meet the relevant test requirements in the two-way transformation of radio and television networks.