论文部分内容阅读
随着社会信息化的进一步发展,人们期盼能在任何地点任何时间以任何方式获取所需要的任何信息。网络发展的方向是:信息流在网络传输、交换过程中始终以光的形式存在,而不需要进行任何的光一电、电一光转换的全光网络。 目前,传输骨干网随着光纤和密集波分复用(DWDM)技术的采用,其传输容量迅速提升,单纤传输能力可达数百Gb/s,完全能够满足信息化时代人们对网络带宽日益增长的需求。对于传输接入网,采用光纤入(FTTH),虽然在技术上已不成问题(目前成熟的用户端光纤转换接口能支持10Gb/s的带宽传输,可以满足未来相当长一段时间内的用户带宽需求),但是光纤入户资金投入巨大,用户端接口昂贵,迄今为止,世界上还没有哪家网络运营商能承受得了,只能望洋兴叹!其他接入方式在传输速率和容量上都无法与光纤入户方式相比。所以,信息流在信息高速公
With the further development of social informatization, people expect to get any information they need anytime and anywhere in any place. The direction of network development is: information flow in the network transmission, the exchange process always exists in the form of light, without the need for any optical-electrical, electrical conversion of all-optical network. At present, with the adoption of optical fiber and Dense Wavelength Division Multiplexing (DWDM) technology, the transmission backbone rapidly increases in transmission capacity and can deliver hundreds of Gb / s in a single fiber. This fully satisfies the increasing demand for network bandwidth in the information age Growing demand. For transmission access network, the use of optical fiber into (FTTH), although technically no problem (currently mature client optical interface conversion can support 10Gb / s bandwidth transmission, to meet the user’s bandwidth demand for a long period of time in the future ), But fiber optic home investment huge, expensive client interface, so far, there is no network operators in the world can withstand, can only hopeless! Other access methods in the transmission rate and capacity are not with the optical fiber into Compared to household mode. So, the information flow in the information highway