标题： 无线分布式存储系统的广播修复技术 显示英文标题

标题： Broadcast Repair for Wireless Distributed Storage Systems

摘要： 在无线分布式存储系统中，存储节点通过无线信道连接，而无线信道本质上具有广播特性。本文利用这一独特特征，设计了一种高效的修复机制，称为广播修复，用于处理无线分布式存储系统的多节点故障情况。由于无线信道通常带宽受限，我们提出了一种新的修复性能衡量标准——修复传输带宽，它表示每个故障节点所需的辅助节点平均传输数据包数量。研究得到了存储容量与修复传输带宽之间的基本权衡关系。结果显示，广播修复在存储效率和修复传输带宽方面优于合作修复（这是有线分布式存储系统中多节点故障的基本修复方法），从而获得了更好的权衡曲线。 显示英文摘要

摘要： In wireless distributed storage systems, storage nodes are connected by wireless channels, which are broadcast in nature. This paper exploits this unique feature to design an efficient repair mechanism, called broadcast repair, for wireless distributed storage systems with multiple-node failures. Since wireless channels are typically bandwidth limited, we advocate a new measure on repair performance called repair-transmission bandwidth, which measures the average number of packets transmitted by helper nodes per failed node. The fundamental tradeoff between storage amount and repair-transmission bandwidth is obtained. It is shown that broadcast repair outperforms cooperative repair, which is the basic repair method for wired distributed storage systems with multiple-node failures, in terms of storage efficiency and repair-transmission bandwidth, thus yielding a better tradeoff curve.