1、计算机专业毕业设计英文翻译网络方向# Wide band optical fiber access network trend of development#Author:# Liu Jinhai article source:# Computer universal time:# 2005-3-8#文中字体改一致#This article first is brief introduced the world broadband access network develops the condition and the main application, next narrated the
2、wide band optical fiber access network merit. With emphasis has once more analyzed the wide band point-to-point active Ethernet optical fiber system and the wide band to the passive optical fiber system characteristic and the application. Meets down proposed our country optical fiber access network
3、sends chem. possible to surmount APON, BPON and the EPON stage, starts from the wide band point-to-point Ethernet optical fiber system and GEPON, finally and even transits to the GPON stage preliminary idea. Finally analyzed the optical fiber communications technology trend of development from each
4、angle.#The broadband access network develops condition and main application#In fact, looking from the telecommunication development history, when the network number of users achieves certain scale. Each kind of application meets the nature production;# this also is so-called steps the Cuff law might
5、 to be at especially. In the history one kind of technology since birth has not been having a big pile of application, regardless of is the mobile communication or the Internet, on its short note, the browsing, the net chats and so on the key applications all is develops certain degree after the use
6、r scale to produce naturally, but is not sedulously designs beforehand plans. #Since has entered for the 21st century, the whole world broadband access network entered the big development phase. To 2004 year#s end, the total number of users already achieved 150,000,000, became in the electricity rel
7、iable historical account to develop one of quickest telecommunication services, and even was also quicker than the mobile service. For example the whole world mobile service from 10,000,000 developed to 100,000,000 has spent for 5.5 years, but the broadband access service has only used for 3.5 years
8、. According to the IDC forecast, in 2007 the global wide band total user may achieve 209,000,000, in which 9.9, namely about 20,000,000 users for optical fiber access network. #The Asian and Pacific area, specially South Korea#s and Japan were the broadband access develop the swiftest most and viole
9、nt country, the South Korean wide band user total already break through 10,000,000, the wide band popular rate occupied the world first, hold family 7 Internet 90%. Japanese Government also vigorously advances the wide band development through each measure, plans in 2005 to enhance the wide band use
10、r total to 30,000,000, in which FTTH achieves 1 10,000.US still is the world biggest broadband access market, the total number of users surpasses 30,000,000.American FOC the wide band service localization is one of 2003-2008 year six big goals, in fact the broadband access is becoming the American u
11、niversal service the next goal. The US broadband access is primarily develops by the cable television and ADSL, because the telecommunication control policy encouragement uses the new technical construction network （e.g. FCC stipulation operation business construction optical fiber access network to
12、 be possible not limited the pressure which in local ring circuit non-colligation policy） as well as the competition and the service grows, recently leads the operation business to be extremely positive to the optical fiber to the station （FTTP） development.#Speaking of the optical fiber access netw
13、ork, specially the optical fiber to station （FTTP） or optical fiber proficient （FTTH）, the whole world already started to enter the unloading phase, only US had 270 FTTP projects, was mostly the local authority, the public company, the property developer and the non-leading telecommunication operati
14、on business project. Leading operation business also starts to enter this domain, in which Version plans in 2005 to complete 3,000,000 FTTP;# SBC in the plan plans in 2007 in its huge “speed of light” to reach 18,000,000 FTTN, each household has speed 20-39Mb/s, provides the end-to-end tertiary serv
15、ice colligation （trite play） the service. Japan is in the world advances the FTTH most radical country, 2.004 years its optical fiber on already understood more than 18,000,000 households families, but the user development lag, probably was 2,000,000, in 2005 plans develops 10,000,000.Europe quite i
16、s steady conservatively, FTTH altogether has laid to 2004 500,000, some 167 small projects or the experimental project are carrying on.#Our country broadband access network extremely is also rapid in the near two year development, according to the preliminary statistics, to 2004 year#s end our country wide band user is 25,000,000, becomes is inferior to US#s second big broadband access market, in which leadership technology is only ADSL, probably accounts for about 70%, next is the Ethernet
