A routing control for interconnected LANs under multiple transmission paths

坂神淡路大地震告诉我们，使用互联网等通用通信网络来支持救援活动中紧急信息的快速传递是非常重要的。我们的目标是实现一个灵活的多用途网络，这是有用的，在日常和紧急情况下。首先，我们专注于通信网络的流量控制，以确保紧急救援活动的信息快速传递。我们提出了一个QoS路由方案，与现有的OSPF协议在IP中的影响最小。我们的研究重点是用于计算QoS路由的算法和必要的修改OSPF，以支持这一功能。该方案具有以下特点：（1）通过将流量分配到可能的路径路径来减少流量拥塞。(2)提出了防灾网络规划框架，提出了信息网络系统层次模型，为防灾救灾通信网络建设提供了参考模型。建议的系统模型是基于谁支持的系统，因为我们相信，人是必不可少的指定的网络系统的设备的人的作用。将该模型应用于计算机网络的防灾难路由设计中，证明了该路由方案和参考模型对Internet等多用途通信网具有广泛的适用性。

The great Hansin-Awaji Earthquake teach us the importance of the use of common purpose communiation networks such as the Internet for supporting the quick delivery of emergent information for relief activities. Our goals are to realizaed a flexible multipurpose network which is useful on ordinary day and in the case of emergence as well.At first, we focused on the traffic control of communication networks to ensure quick delivery of emergent information for relief activities. We proposed a QoS routing scheme with the least possible impact on the existing OSPF protocol in IP.The focus of our research is on the algorithms used to compute QoS routes and on the necessary modifications to OSPF to support this function. The proposed scheme has the following features,(1) reduce traffic congestion by allocating flows to possible routes of path.(2) ensure the quick delivery of the important flows by giving them priority of route selection.We also considered the framework of network planning for disaster prevention, and proposed the hierarchical model of information network system as the referential model for constructing communication networks for dissaster prevention/relief. The proposed system model is based on the role of the people who support the systems since we believe that people are essential for specifying the equipments of the network systems. We also conseder the effectiveness of the model, applying to the desigen of the computer netwrok for dissaster prevention.We showed that both of the proposed routeing scheme and referencial model are widly applicable for oredinal multipurpose communication networks such as the Internet and so on.