Research for quality assurance type multicast systems

质量保证型组播系统研究

• 批准号: 15500035
• 负责人: SATO Fumiaki
• 金额: $ 2.43万
• 依托单位: Toho University (2005)Shizuoka University (2003-2004)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15500035/
• 关键词: Multicast; QoS; Quality of Communication; Ad-hoc Networks; Retransmission Control; プロトコル

The sender collected all information on the communication quality of each link and the best delivery tree was constructed in an existing quality assurance type multicast system. However, assumption of collecting communication quality information had the problem in the feasibility in a large-scale system. In this research, when the control packet was flood, it proposed a new method to decide the path while spreading adding communication quality information, and the effectiveness was evaluated.Moreover, an efficient retransmission control is needed in the quality assurance type multicast system. Especially, an efficient retransmission control has a big influence in the network quality on a wireless network like an ad hoc network. The feature of this research is a method which retransmits in the path to which the communication link in an ad hoc network disconnects without searching for a past transmission path again by local recovery.We introduced the concept of support group for local recovery. The support group is formed as a by-product of a usual path search algorithm. And, the concept is for the watch of the communication link, the detection of the disconnection, the packet retransmission and to construct an alternative communication path locally. The support group is few the overhead because it is made from the process of a usual path search. Moreover, because recovery to the packet loss is done locally and quickly, the retransmission mechanism can be effective in a real-time data transfer. These algorithms were compared by ODMRP and the simulation which was the past, ad hoc multicast protocol. As a result, the method that we proposed improved the packet arrival rate of the past method. Moreover, it was shown that our method could make the reconstruction interval longer than the past method. This result was presented as an international conference thesis.

发送方收集有关每个链路的通信质量的所有信息，并在现有的质量保证型组播系统中构建最佳传递树。然而，收集通信质量信息的假设在大规模系统中存在可行性问题。本研究针对控制报文泛洪时，提出了一种在传播的同时添加通信质量信息来决定路径的新方法，并对其有效性进行了评价。此外，质量保证型组播系统需要有效的重传控制。特别是，有效的重传控制对诸如自组织网络的无线网络的网络质量具有很大的影响。本研究的特点是通过本地恢复，在自组织网络中的通信链路断开的路径中进行重传，而无需再次搜索过去的传输路径。我们引入了本地恢复支持组的概念。支持小组是作为常用路径搜索算法的副产品而形成的。并且，该概念用于监视通信链路、检测断开、数据包重传以及在本地构建替代通信路径。支持小组的开销很少，因为它是由通常的路径搜索过程组成的。此外，由于丢包的恢复是在本地快速完成的，因此重传机制在实时数据传输中可以是有效的。通过ODMRP和模拟过去的ad hoc组播协议对这些算法进行了比较。因此，我们提出的方法提高了过去方法的数据包到达率。此外，结果表明我们的方法可以使重建间隔比过去的方法更长。该成果作为国际会议论文发表。

项目成果

A Testing Method Using a Testing Policy for Real-time Distributed Object Systems

一种使用测试策略的实时分布式对象系统测试方法

• 发表时间: 2004
• 期刊: Proc. of IEEE International Symposium on Communications and Information Technologies 2004 (ISCIT2004)
• 作者: 吉田健一;鶴正人;勝野聡;T.Takahashi;寺島美昭
• 通讯作者: 寺島美昭

無線網における高信頼マルチキャストのハイブリッド誤り回復方式の性能評価

无线网络中可靠组播混合错误恢复方法的性能评估

• 发表时间: 2004
• 期刊: 情報処理学会論文誌 45・11
• 作者: 金子 広孝;大坐畠 智;萩原 洋一;寺田 松昭;川島 幸之助;佐藤文明
• 通讯作者: 佐藤文明

接木方式によるアプリケーションレベルマルチキャスト配送木の構築

采用嫁接法构建应用级组播传送树

• 发表时间: 2004
• 期刊: 情報処理学シンポジウムDICOMO2004
• 作者: H.Hosogoshi;O.Mitobe;T.Yoshinaga;M.Sowa;佐藤文明
• 通讯作者: 佐藤文明

IT Text 分散処理

IT文本分布式处理

• 发表时间: 2005
• 作者: 矢原雅俊;藤本一也;最所圭三;谷口秀夫
• 通讯作者: 谷口秀夫

Performance Analysis of Hybrid Error Recovery Methods for Reliable Multicast in Wireless Networks

• 发表时间: 2004
• 作者: 則 鈴木偉元†上野英俊†石川憲洋†高橋修††佐藤文明†††水野忠;Hideharu Suzuki;Hidetoshi Ueno;N. Ishikawa;Osamu Takahashi;Fumiaki Satoh;Tadanori Mizuno;静岡大学情報学部