Adaptive Burst Transmission Scheme for WSNs
Adaptive Burst Transmission Scheme for WSNs
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DOI：
10.1109/icccn.2017.8038493
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发表时间：
2017-07
期刊：
影响因子：
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通讯作者：
Zeeshan Ansar;W. Dargie
中科院分区：
文献类型：
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作者：
Zeeshan Ansar;W. Dargie
近年来，无线传感器网络中的大容量数据传输成为研究的热点。其目的是使需要高吞吐量但小规模部署的应用程序受益。医疗保健应用程序和旨在支持老年人独立生活的应用程序是典型的例子。其主要思想是专门为一个发送器提供信道，直到它传输了缓冲器中积累的所有数据包。这种独占使用避免了无目的的竞争，并通过免除重复的空闲信道评估、随机回退以及每个单个分组的RTS和CTS分组的传输来显著降低分组传输延迟。然而，支持批量数据传输的现有或拟议的MAC协议对链路质量波动反应不佳，因为即使接收到的数据包的统计数据表明信道仍然很差，或者数据包传输将被任意推迟，节点也会重复尝试重传丢失的数据包，尽管数据包丢失是一个孤立且不相关的事件。在本文中，我们解决这些问题，并估计从收到的ACK数据包的统计数据的好的和坏的链接的持续时间。此外，我们提供了一个MAC层的解决方案，使多个发射机在批量数据传输的共存。
Recently, bulk-data or burst transmission has been the focus of research in wireless sensor networks. The aim is to benefit applications which require high throughput but small scale deployment. Healthcare applications and applications which are intended to support independent living for the elderly are typical examples. The main idea is to exclusively provide the channel for one transmitter only until it has transferred all of the packets it has accumulated in the buffer. This exclusive use avoids aimless contention and significantly reduces packet transmission latency by dispensing with repeated clear channel assessment, random back-off, and the transmission of RTS and CTS packets for every single packet. Existing or proposed MAC protocols supporting bulk-data transmission, however, do not react well to link quality fluctuation, since nodes make repeated attempt to retransmit lost packets even when the statistics of received packets suggests that the channel is still bad or packet transmission will be deferred arbitrarily even though packet loss is an isolated and uncorrelated occurrence. In this paper, we address these issues and estimate the duration of good and bad links from the statistics of received ACK packets. Moreover, we provide a MAC layer solution to enable the coexistence of multiple transmitters during bulk-data transfer.