Distributed micro-switching network accelerating popularization of multimedia communication

本研究的目的在于利用交换系统小型化的优势，将公共网络快速创新为基于多媒体的网络，并提出一种适合此目的的微交换网络架构。本文对所取得的研究成果作了如下评述：通过公共网络接入互联网可以成为网络创新的载体。互联网服务向公共网络的迁移必然是公共网络的演进。分布式微交换网络应提供高效、高速的互联网接入功能。微交换网络采用树形拓扑结构，以适应随机分布在广域内的大量用户。基于小区的信令系统应尽量减少由于交换系统分布造成的呼叫连接延迟，并减少汇接交换机的硬件体积。建立了基于小区的信号传输系统的基本规范。一个用于互联网接入的路由器应该位于分布式用户节点，以便为互联网接入提供最好的服务。互联网接入的上行流使用信令设施；用户环路中的d通道信令系统，以及串联网络中的基于小区的信令系统。下行流利用许多用户共享的串联链路。一个简单的单级时间开关的顺序写入和随机读取功能允许IP数据包的逐包多路复用和广播。该研究还指出，有必要为IP广播提供选择性下载功能，因为某些用户的任何IP数据包都不应该到达其他用户的自定义场所。这些服务是公共网络的，而不是私有区域的局域网。还演示了选择性下载设施的基本配置。该结构符合ADSL技术，是金属用户环路的一种有希望的技术。这是一种有希望用于金属用户环路的技术。少

The objectives of this research is to show how to quickly innovate the public network to the multimedia-based network taking advantages of downsizing of switching systems, and to present a micro-switching network architecture suitable for the purpose. The remarks of the obtained results of the research are as follows ;The internet access through the public network can be a carrying vehicle for the network innovation. Immigration of the internet services into the public network must be an evolution of the public network. The distributed micro-switching network should provide functions for efficient and high-speed internet access.The micro-switching network adopts tree topology to accommodate large amounts of subscribers randomly scattered over the wide area. Cell-based signaling systems should be developed to minimize call connection delay due to the distribution of switching systems, and to reduce hardware volume of thr tandem switch. Fundamental specification of the cell-based signali … More ng system is established.A router for the internet access should locate at the distributed subscriber node to use the besteffort services for the internet access. The upward stream of the internet access uses signaling facilities ; the D-channel signaling system in the subscriber loop, and cell-based signaling systems in the tandem network. The downward stream utilizes the tandem link shared by many users. The sequential-write and random-read function in a simple one-stage time switch allows packet-by-packet multiplexing and broadcasting of the IP packets. The research also pointed out the necessity of selective downloading functions for the IP broadcasting, this is because any IP packet for some user should not reach custom premises of other users'. The services are of the public network, not of LAN in a private area. The fundamental configuration of the selective downloading facilities are also demonstrated. The architecture fits the ADSL technology which is a hopeful technology for metallic subscriber loops.Technology which is a hopeful technology for metallic subscriber loops. Less