CISE Postdoctoral Research Associateships in Experimental Computer Science - Data Replication in Peer to Peer Broadcast Networks

EIA-0000516 Wolfson，Ouri伊利诺伊大学，芝加哥CISE实验计算机科学博士后研究员：对等广播网络中的数据复制一个移动的计算问题，最近产生了大量的兴趣是数据广播。 问题是如何组织页面在广播中从一个服务器向一个庞大的客户群体传播信息. 一个强相关的问题是如何在接收广播的移动的单元中复制（或缓存）广播数据。 我们的研究涉及的问题ofbroadcast和复制在一个对等的，而不是客户端-服务器架构的研究。 这些架构的动机是新兴的无线广播网络，其中接收节点可能会断开连接，关闭或断电，消息可能会损坏。 此外，由于通信成本的增加，通过确认和重传的可靠广播可能不合理。 博士后将探索对等广播复制的基本原则：何时广播，广播什么，以及衡量给定复制方法效率的成本函数。 不同的广播复制算法将进行分析和实验比较，助理将1）设计和分析不同的广播复制算法，2）设计和进行实验来比较这些算法。

EIA-0000516Wolfson, OuriUniversity of Illinois, ChicagoCISE Postdoctoral Associates in Experimental Computer Science: DataReplication in Peer to Peer Broadcast NetworksA mobile computing problem that has generated a significant amount ofinterest recently is data broadcasting. The problem is how to organize thepages in a broadcast from a server to a large client population in thedissemination of information. A strongly related problem is how toreplicate (or cache) the broadcast data in the mobile units that receivethe broadcast. Our research involves the study of the problems ofbroadcast and replication in a peer-to-peer rather than client-serverarchitectures. These architectures are motivated by new types of emergingwireless broadcast networks where receiving nodes may be disconnected,turned off or out of power, and messages may be corrupted. Further,reliable broadcasting by acknowledgment and retransmission may not bejustified due to increases in communication costs. The postdoctoralassociate will explore fundamental principles of peer-to-peer broadcastreplication: when to broadcast, what to broadcast, and the cost functionsto measure the efficiency of a given replication approach. Variousbroadcast replication algorithms will be compared analytically andexperimentally and the associate will 1) design and analyze variousbroadcast replication algorithms, and 2) design and conduct experiments tocompare these algorithms.