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arXiv 1601.01909cs.ITmath.IT
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基于二进制网络码的订单约束应用的交付时间缩减

Delivery Time Reduction for Order-Constrained Applications using Binary Network Codes

Ahmed Douik, Mohammad S. Karim, Parastoo Sadeghi, Sameh Sorour

摘要:

考虑一个无线接入网络,其中基站需要通过独立的擦除信道向一组用户传递一组顺序约束消息。本文研究了使用即时可解码网络编码(IDNC)减少传输时间的问题。受时间关键型和订单约束型应用程序的影响,在每次传输时,传递时间被定义为未传递消息的数量。交货时间最小化的问题是计算棘手的,大多数现有的文献IDNC提出次优的在线解决方案。本文提出了一种新的方法来解决这个问题,通过引入交货延迟作为一个距离最优的措施。导出了一个表达式,其特征在于使用交付延迟的交付时间,允许近似的交付时间最小化问题的优化问题,涉及交付延迟。这个问题,然后,制定为一个最大的重量集团选择问题的IDNC图,其中每个顶点的权重反映其相应的用户和消息的延迟。仿真结果表明,所提出的解决方案实现了较低的交付和完成时间相比,最知名的物流配送时间减少。

英文摘要:

Consider a radio access network wherein a base-station is required to deliver a set of order-constrained messages to a set of users over independent erasure channels. This paper studies the delivery time reduction problem using instantly decodable network coding (IDNC). Motivated by time-critical and order-constrained applications, the delivery time is defined, at each transmission, as the number of undelivered messages. The delivery time minimization problem being computationally intractable, most of the existing literature on IDNC propose sub-optimal online solutions. This paper suggests a novel method for solving the problem by introducing the delivery delay as a measure of distance to optimality. An expression characterizing the delivery time using the delivery delay is derived, allowing the approximation of the delivery time minimization problem by an optimization problem involving the delivery delay. The problem is, then, formulated as a maximum weight clique selection problem over the IDNC graph wherein the weight of each vertex reflects its corresponding user and message's delay. Simulation results suggest that the proposed solution achieves lower delivery and completion times as compared to the best-known heuristics for delivery time reduction.

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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