A Reliable Multicast System for Shared Virtual Environment

共享虚拟环境的可靠组播系统

• 批准号: 12680412
• 负责人: SATO Fumiaki
• 金额: $ 2.05万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12680412/
• 关键词: Reliable multicast; Totally ordered Multicast; Security; 共有仮想空間; 鍵配布方式; セキュアマルチキャスト

Although multicast communication is paid attention as a technology which can efficiently distribute information to the large number of people, the high-reliability technology or the security technology developed in the peer-to-peer communication are not applicable. Especially, we have developed the high trust multicast technology to share a virtual space in real time. The multicast system that we propose divides the user into some domains, and gives the all order of the message and reliability on the assumption of the random numbers generation mechanism and the sequence server of each domain.In this research, the amount of a communication delay and extra messages were evaluated, when the number of domains and the interval for distribution of information on the message rate were changed. It turned out the same number of clients that the number of control messages decreased when the domain composition was introduced and the situation, especially the number of partitions was reduced, and … More the communication delay decreased as a result. This depends on change the transmission rate of an individual user having been leveled in the effect of the domain compositionMoreover, the encryption to transmit information only to a specific member for the multicast becomes very important. To renew the key corresponding to the change of membership, the efficient method of delivering a key is needed. Therefore, we proposed the framework to make the key asynchronously issued in two or more key distribution servers. Then, we evaluated it by the simulation. There was no system stop when the key was renewed, and it was confirmed that the method of key distribution was efficient though time when two or more keys were managed at the same time was caused.Finally, it proposed the method of preparing the node only for the processing of retransmission which was called a retransmission server about the processing of retransmission of the multicast. The method of constructing the tree to make between retransmission servers which were called a tree of retransmission cooperate was designed. Especially, it proposed the method of preparing an alternative link when the link between retransmission servers that were called a backup link was disconnected, and the reliability of the retransmission tree was able to be improved. Less

虽然组播通信作为一种能够高效地将信息分发给大量用户的技术受到了人们的关注，但在点对点通信中发展起来的高可靠性技术或安全技术并不适用。特别是开发了高信任组播技术，实现了虚拟空间的实时共享。本文提出的组播系统将用户划分为若干个域，并在假设随机数生成机制和每个域的序列服务器的基础上给出消息的全部顺序和可靠性。在本研究中，当域数和信息分布间隔对消息率的影响发生变化时，对通信延迟量和额外消息量进行了评估。结果表明，在相同的客户端数量下，引入域组合后，控制消息的数量减少了，特别是分区的数量减少了，通信延迟也减少了。这取决于在域组合的影响下单个用户的传输速率的变化，而且，为了组播而只向特定成员传输信息的加密变得非常重要。为了更新对应于成员变更的密钥，需要一种有效的密钥传递方法。因此，我们提出了在两个或多个密钥分发服务器中异步发布密钥的框架。然后，通过仿真对其进行了评估。更新密钥时没有出现系统停止的情况，虽然会造成同时管理两个或多个密钥的时间，但验证了密钥分发方法的有效性。最后，提出了为处理组播重传而准备节点的方法，该方法被称为组播重传服务器。设计了在重传服务器之间构建重传树的方法，称为重传合作树。特别是提出了在重传服务器之间的链路（称为备份链路）断开时准备备用链路的方法，从而提高了重传树的可靠性。少

项目成果

Fumiaki Sato: "A Totally Ordered and Secure Multicast Protocol for Distnbuted Virtual Environment"Proc.of IEEE ICPADS Workshops(7th). 55-60 (2000)

Fumiaki Sato：“用于分布式虚拟环境的完全有序且安全的多播协议”Proc.of IEEE ICPADS 研讨会（第 7 届）。

細谷篤: "Adaptive Malticast Protocolの改良"情報処理学会第62回全国大会. 7T-2 (2001)

Atsushi Hosoya：“自适应多播协议的改进”日本信息处理学会第 62 届全国会议（2001 年）。

藤井 亮治: "セキュアマルチキャストのためのFECを用いた鍵配送方式"情報処理学会研究報告. 2002,85. 73-80 (2002)

Ryoji Fujii：“使用 FEC 进行安全多播的密钥分配方法”日本信息处理协会研究报告 2002，85（2002）。

藤井 亮治: "全順序マルチキャストプロトコルに基づくセション鎌配送方式の提案"情報処理学会 DICOMO2001 シンポジウム論文集. 579-584 (2001)

Ryoji Fujii：“基于全序多播协议的Session Kama传递方法的提案”日本信息处理学会DICOMO2001研讨会论文集579-584（2001）。

Fumiaki Sato: "A Retransmission Tree Configuration for Mobile Multicast"IEE International Workshop on Reliable and Secure Applications in Mobile Environment. (2001)

Fumiaki Sato：“移动组播的重传树配置”IEE 移动环境中可靠和安全应用国际研讨会。