【 Weak current College 】 talking about smart community broadband access and its technology development trends

Summary: the article discusses current intelligence community broadband access issues faced by, and on intelligent community access network technology development trends brief introduction.

Keyword intelligence community new Moore's law broadband access broadband information service

1 Introduction

With modern communication technology, computer network technology and the rapid development of information industry, the digitization, network, and information is increasingly integrating people, current for residential smart business needs broadband smart community building has become the focus of attention. Previously, people on the Internet generally is at your own work, now it is hoped that after work at home or on the Internet "surfing". Based on this request, the intelligent community must for Internet access, and must be a broadband access. Currently, our intelligent community broadband access in the network construction and application of the main problems from three aspects: trunk parts, wiring and inlet section, broadband information services.

2 new Moore's law

New Moore's law is administered by the United Nations "1999 World Telecommunications Forum,, Deputy Chairman John · Ross (JohnRoth) in the Forum's opening speech: Internet bandwidth every 9 months will be doubled in size, but cost reduction half the speed of change than chip every 18 months even faster. This law is also known as "the law, that fiber (OpticalLaw). Moore's law (Moore, sIAw) used to describe the rapid transformation of semiconductor technology, an average of 18 months, wafer capacity will grow a times, costs reduced by half, the "law", then the fiber used to describe the network technology. Reality proves that new Moore's law is correct.

3 high-speed backbone

Achieving intelligent community broadband access, the prerequisite is the backbone should have sufficient bandwidth. Long time, the Internet speed is always troubled domestic network users in a big problem, while resulting in a series of issues plaguing the domestic network sector, these issues to the development of our network cause significant adverse effects, serious constraints on the economic development of China's network, a national Internet development has brought a lot of obstacles. It can be said that the bandwidth control the Internet.

The present case, the speed still hindering the development of the domestic Internet. The tens of millions of Internet users in China, have suffered the pain of information freeways clogged, on network users, on the one hand, they use the Internet to find a more exciting life than ordinary enjoyment, we only used a computer and a phone can go all over the world. However, due to the impact of network bandwidth, netizens surfing get enjoy limited in some wonderful text above, the lack of socialization multimedia effects, and other application services. China's largest Internet provider of China Telecom's CHI-NAN-Cho, over the past several years of development, although it has made a substantial investment in constant bandwidth expansion, but the backbone bandwidth has until recently only 155M expanded to 2.5G. Several other Internet providers such as Golden Bridge networks, education and science and technology network, and so much is because of financial and other resources, its bandwidth has been feeble. The Internet provider's network interoperability also needs to be improved, such as CHINANET user logon belongs to education network website speed is slower. Because the Internet is slow, objectively the same caused users to obtain resources to increase the amount of time, the corresponding input cost increases, combat. For ISP/ICP, narrow bandwidth makes a rise in the number of users increase slowly. Historically, ISP/ICP are at a loss in business, at the Internet days, China's ISP business and did not receive the appropriate development, but also in other aspects of serious constraints to the domestic Internet industries.

Therefore, the construction of high speed data backbone is the future of the Internet industry an important aspect of development. The beginning of August, China Telecom successfully launched between Beijing, Shanghai and Guangzhou 2.5G high-speed ring circuit, CHINANET network performance and technical standards in domestic and international leading level. Since the beginning of 2000, China Telecom will launch a series of initiatives to improve domestic network performance, expanding bandwidth, making domestic network user access speed and quality of the Internet has been improved. It is reported that China Telecom's efforts, the current domestic backbone bandwidth has been enhanced, but also the international bandwidth in the second half of the year reached 1G. By then, network users access to domestic and international sites of speed and quality will have significantly improved.

The backbone of construction, recommendation backbone using ring structure, can be an SDH self-healing ring or fiber-optic ring. Self-healing ring is most appropriate for a big business, and does not allow break areas. Fiber optic ring is composed using apparatus cable loops. Once the cable is cut off, each optical network unit (0NU) can be transmitted along the opposite direction, so as to achieve the protection objective. Fiber-optic rings are best suited to potential large users with dual route of protection.

4 distribution and inlet section

Currently, access network market competition is very fierce, largely because of the wide variety of access network technology and its construction complexity. Grasp the development of broadband access network technology trends on has entered high-growth period of the construction of the access network in China is crucial. The rise of broadband information service started, the first of fix IP access. If you access network backbone layer employing SDH-ADM consisting of rings or ATM fiber access and other broadband technologies for IP business solutions is not a problem. The key is wiring layer, unless the person layer. Currently available broadband IP access technologies have XDSL, HFC and Ethernet technology, these technologies have their own characteristics suitable for different applications. Personalized user business diversification, narrow-band broadband will co-exist in a given period of time and smooth transition. Compare these with the development of broad-band information service, future access XDSL and HFC access network technology. XDSL is the telecom industry respected based on telephone line transmission of broadband and television industry respected lHFC is based on coaxial cable transmission ofL apply provided that in order to exploit himself laid phone line l as long as the increase XDSLMODEM or CABLE can, and ultimately on IrItemet aimed at the future of IP telephony, who first put the entire community in hand, who was on: future services. ADSL technology can only provide 1.5M downlink with the latest technology can only provide EDSL downlink and uplink 800K 8M, HFC technology sharing the bandwidth, user 40M more assignments are the two technologies can be applied to those original has cloth but under the new Moore's law, I 「introduction both technologies will increase due to the volume of information is the most limited bandwidth overwhelmed, had to withdraw from the market competition.

Ethernet network topology flexibility already familiar, manageable control has been the network an outstanding representative of technological development. As market development, Ethernet technology with each passing day, from initial development to 10 m bandwidth 100M, 1 GB or 10GB bandwidth, demonstrated its vitality, and in particular the emergence of a local area network switching technology, Ethernet switching technology to develop more rapidly, growing market share, as well as many earlier in the LAN technology is gradually being squeezed out of the market. It can be said, in today's markets including LAN LAN, Ethernet has possession of the absolute leading position.

Ethernet access technology with line stability, access speed is high, with a fixed IP address, cost relatively inexpensive and is suitable for large-scale promotion of benefits for the user's investment is saved, just in your own PC to install a piece of cheap network adapters can achieve high-speed broadband Internet access. In more than 30 years of history, Ethernet technology has strong vitality and tremendous development speed, so that it gradually away from the internal network to the end-user access network development, becoming the latest access network technology, building technology using Ethernet broadband access network there are many factors: the technology not only solve the problem, narrow band also provide the user with Ethernet interface and digital image interface, supports a wide variety of broadband, IP service access, easy to solve many of the problems of access network, it represents the access network technology development.

5-band information service
Building intelligent community's goal is to provide for community household broadband interactive multimedia information of high quality services, the provision of a culture and education, leisure and entertainment, shopping and service good information environment, provide the user with a practical, low-cost network platform, while also enabling education and cultural information, and other multimedia information and results will directly benefit from Intemet revolution. After achieving broadband access, you can carry out V0D VOD business and broadband multimedia services (remote communications, online shopping, online teaching, and telemedicine, video conferencing, e-business, Home Office, offsite resources shared between), community information, etc.

Continue to enrich the content of broadband information service, provides the user with more broadband value-added services that enable broadband network has become the real significance of the broadband network is very important, it's about survival and development of the network, while at the same time it also is a broadband network for the future development direction.

6 conclusions

We know from the above discussion, realization of intelligent communities for broadband access, the first backbone should have adequate bandwidth, while the backbone should ring structure, can be an SDH self-healing ring or fiber-optic ring. In introducing the wiring layer and layer Ethernet technical superiority will make it into the mainstream of the intelligent community network.

After achieving broadband access, intelligent community household can be at home enjoying the variety of ISP to provide broadband services.