Accounting for Reliability in Unacknowledged Time-Constrained WSNs
Accounting for Reliability in Unacknowledged Time-Constrained WSNs
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DOI：
10.1145/3241746
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发表时间：
2019-08
影响因子：
2.3
通讯作者：
Philip Parsch;Alejandro Masrur
中科院分区：
文献类型：
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作者：
Philip Parsch;Alejandro Masrur
无线传感器网络通常由定期收集和传输数据的节点组成。在这种情况下，我们担心未确认的通信，例如成功接收数据包后未确认的情况。这允许减少通信信道上的流量-既不发送重传也不发送重传-并导致更少的开销和更少的能耗，这是物联网时代有意义的目标。然而，数据包可能会丢失，因此我们不知道从一个节点到另一个节点传输数据需要多长时间，这阻碍了任何形式的实时操作和/或服务质量。为了克服这个问题，我们提出了一种介质访问控制协议，它包括在一个随机的时刻，但在指定的时间间隔内从最后一次传输传输每个数据包。与文献中现有的方法相比，所提出的介质访问控制可以被配置为满足可靠性要求，由至少一个数据分组在指定的截止日期内到达其目的地的概率给出，在没有中断的情况下。我们说明了详细的OMNeT++模拟的基础上提出的方法的这一点和其他好处。
Wireless sensor networks typically consist of nodes that collect and transmit data periodically. In this context, we are concerned with unacknowledged communication, such as where data packets are not confirmed upon successful reception. This allows reducing traffic on the communication channel—neither acknowledgments nor retransmissions are sent—and results in less overhead and less energy consumption, which are meaningful goals in the era of the Internet of Things. However, packets can be lost, and hence we do not know how long it takes to convey data from one node to another, which hinders any form of real-time operation and/or quality of service. To overcome this problem, we propose a medium access control protocol, which consists of transmitting each packet at a random instant but within a specified time interval from the last transmission. In contrast to existing approaches from the literature, the proposed medium access control can be configured to meet reliability requirements—given by the probability that at least one data packet reaches its destination within a specified deadline—in the absence of acknowledgments. We illustrate this and other benefits of the proposed approach based on detailed OMNeT++ simulations.