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arXiv cs/0611064cs.NIcs.PF
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恒定开销的分布式链路调度

Distributed Link Scheduling with Constant Overhead

Sujay Sanghavi, Loc Bui, R. Srikant

摘要:

本文提出了一类新的简单的,分布式算法在无线网络中的调度。该算法通过对现有时间表的简单本地更改以分布式方式生成新的时间表。该类由整数$k\geq 1$参数化。我们表明,我们的类的算法$k$实现$k/(k+2)$的容量区域,对每个$k\geq 1$。该算法具有小的和恒定的最坏情况开销:具体地,算法$k$使用小于网络中相邻节点之间的$4k+2$往返时间的{ \em(a)}时间,以及对于任何$k$,任何给定节点的{ \em(b)}最多三次控制传输来生成新调度。控制信号是明确规定的,并且面临与正常数据传输相同的干扰效应。我们的分布式无线调度算法的类是第一个保证实现任何固定比例的容量区域,同时使用小而恒定的开销,不与网络规模的规模。参数$k$明确地捕获控制开销和调度器吞吐量性能之间的权衡,并提供了一个调整旋钮,协议设计人员可以使用它来在实践中利用这种权衡。

英文摘要:

This paper proposes a new class of simple, distributed algorithms for scheduling in wireless networks. The algorithms generate new schedules in a distributed manner via simple local changes to existing schedules. The class is parameterized by integers $k\geq 1$. We show that algorithm $k$ of our class achieves $k/(k+2)$ of the capacity region, for every $k\geq 1$. The algorithms have small and constant worst-case overheads: in particular, algorithm $k$ generates a new schedule using {\em (a)} time less than $4k+2$ round-trip times between neighboring nodes in the network, and {\em (b)} at most three control transmissions by any given node, for any $k$. The control signals are explicitly specified, and face the same interference effects as normal data transmissions. Our class of distributed wireless scheduling algorithms are the first ones guaranteed to achieve any fixed fraction of the capacity region while using small and constant overheads that do not scale with network size. The parameter $k$ explicitly captures the tradeoff between control overhead and scheduler throughput performance and provides a tuning knob protocol designers can use to harness this trade-off in practice.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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