摘要
Abstract
With mobile communication evolving from 4G to 4.5G in a few years, in order to analyze its impact on transmission, especially the PTN network, based on the changes of characteristics of the wireless network and the improvement of capacity, connection and delay sensitivity, this paper analyzed transmission network requirements of 4.5G, that is high bandwidth base station requirement, base station coordination requirement, and IOT development requirement, etc. Based on the above requirements, this paper analyzed technology evolution including over 100G large capacity interfaces, high precision time synchronization, NGFI, SPTN, etc. Then it discussed that metro transmission PTN network for 4.5G will gradually turn down on three-layer network, and measured the metro transmission network bandwidth, puting forward the metro transmission network evolution direction and technical characteristics of the core layer, convergence layer and access layer.关键词
4.5G演进/分组传送网/物联网/大容量接口/城域传输网Key words
4.5G network evolution/Packet Transport Network/Internet of Things/large capacity interface/metro transmission network分类
信息技术与安全科学
