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Internet use in HFC EPON technology is the best way to achieve triple play I. Introduction 2005 10 11 "National Economy and Social Development of the proposed Five-Year Plan" that "broadband communication network, Internet, digital television and next generation information infrastructure, promoting ' triple play ', a sound information security system. "Although this is a word, but it caused widespread concern in society, it gives a major policy communications signal industry. "Triple play" means the telecommunications network, computer network, broadcast network convergence in technology; interoperability at the network level; in the business layer, infiltration and cross each other; in the application layer communication protocol towards a unified conducive to achieving the maximum degree of shared network resources; in operation on competition and co-operation. The entire network to the next generation network evolution, which is the inevitable trend of network development. Also opened a communications network operators of all one-way business competition shifts from full-service competition, and even the full range of networks at all levels of competition. "Triple play" at this stage is not the PSTN telephone communications network, computer network, the three major broadcast television network physical unity, nor is it a simple extension of the existing three networks and overlay, but the organic integration of the respective advantages is the survival of the fittest evolutionary process, the final results to the next generation of networks, stand cutting edge of technology to consider, the current three networks, Whose progress of network technology to the next generation network solid, then this network will be in the "triple play" in the occupation of the initiative, and even alternative location. Our HFC network radio and television in the "triple play" of history is a rare opportunity in the competition to be able to remain invincible in the network of multi-business transformation, we must find its starting point. Ethernet + passive optical network technology (EPON) provides 100M to 10G bandwidth, and seamless with the existing computer network connection, the network structure is simple, low-cost construction and operation, can support all the bandwidth Internet applications, and support data language, video-on-demand multi-service capabilities, such a network is the most typical, most applicable, most rational and cheap "triple play" the best way. In this paper, the analysis of HFC networks, discussion on the EPON proposed upgrade in the HFC, the structure of passive optical networks EPON necessity and feasibility. 2, HFC network technology of the advantages and disadvantages 1, HFC network technology advantage (1) HFC network to provide enough bandwidth signal transmission, and bandwidth requirements are relatively fixed 5-750MHZ, this bandwidth and send the copy number of programs, has nothing to do with the user. (2) HFC network is a multipoint broadcast networks can support both analog TV signals and digital TV signal transmission, which is not available in other network access is a unique feature of HFC networks. (3) HFC network, the high security requirements, is due to China's HFC network to bear the party's orders, prohibited the illegal use of network elements or to undermine the reactionary media in the normal network transmission. (4) HFC network to support interactive services, for data, language, video, broadband access services. But the need for two-way HFC network transformation. The traditional two-way HFC network transformation, using frequency division format, as broadband access, in development is a key issue facing the upstream channel noise in the accumulation and retention of balance problems. This is a two-way HFC network topology of congenital problems. To control the noise funnel effect, mainly adopt the following measures: First optical node, and limit the number of service users. To control the following in the 500, but also the generation of the user as little as possible. Because the user terminal the more mixed up the noise superimposed on the larger number of users limited optical node of the service is to reduce the intrusive noise of the most effective way. Two distribution systems to optimize the shielding users choose a high shielding performance of cables and high index of equipment, invasive noise attenuation. Because the coaxial cable outer conductor is a transmitting antenna and receiving antenna dual role, therefore, must be strictly requires the user distribution system cables and passive components of the shield. Third, do not open two-way business users, plus band-pass filter, the noise isolation clients return. Fourth, the network is reasonably designed to minimize the number of wires in the connector. Improve the network's construction quality, especially in joint connection process, while also improving service levels. Transformation on two-way HFC network, it is based on optical node as a unit, optical node the following must be carried by the user to implement a full range of two-way transformation, transformation costs and higher cost. After transformation, the two-way network, not all users on the Internet, has resulted in a waste of investment in the network. I am an expert from laptopaccessoriessupplier.com, while we provides the quality product, such as Laptop Motherboards , Others, Laptop Motherboards,and more.
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