Recent studies have revealed that the energy hole problem caused by multi-hop data collection in a static data collector based wireless sensor network(WSN) is a major threat to the lifetime of the network. With the advancement of mobile terminal technology, the application of mobile data collectors (MDCs) has gained popularity in a large scale WSN. A WSN design with one or more MDC can significantly diminish the energy hole problem, which in turn prolongs the network operational lifetime. However, most of the MDC based existing schemes suffer from achieving a balance between routing energy consumption and data delivery delay. Moreover, the majority of the sensor network protocols fail to retain their impact as the network topology changes due to the inclusion or exclusion of nodes. So, for a dynamic WSN, it is essential to support a recovery mechanism to continue the data propagation despite inevitable changes in the WSN topology. Considering all the aforementioned challenges, this paper proposes an adaptive hierarchical data dissemination (AHDD) mechanism for multiple MDC enabled dynamic wireless sensor network, which alleviates the energy hole problem as well as resolves the fault-tolerance issue. Simulation results demonstrate that the proposed protocol has shown improved performance with respect to performance metrics namely, network lifetime, energy efficiency, packet delivery percentage, and end-to-end delay.

最近的研究表明，在基于静态数据收集器的无线传感器网络（WSN）中由多跳数据收集引起的能量空穴问题是对网络生命周期的主要威胁。随着移动终端技术的进步，移动数据收集器（MDC）的应用已在大规模WSN中获得普及。具有一个或多个MDC的WSN设计可以大大减少能量漏洞问题，从而延长了网络的使用寿命。但是，大多数基于MDC的现有方案都难以在路由能耗和数据传递延迟之间取得平衡。此外，由于节点的包含或排除，随着网络拓扑的变化，大多数传感器网络协议都无法保留其影响。因此，对于动态WSN，尽管WSN拓扑不可避免地发生了变化，但必须有一种支持恢复机制以继续进行数据传播的机制。考虑到上述所有挑战，本文针对具有多个MDC功能的动态无线传感器网络提出了一种自适应分层数据分发（AHDD）机制，该机制可缓解能量漏洞问题并解决容错问题。仿真结果表明，所提出的协议相对于性能指标（网络寿命，能效，数据包传递百分比和端到端延迟）表现出更高的性能。本文针对具有多个MDC功能的动态无线传感器网络提出了一种自适应分层数据分发（AHDD）机制，该机制可缓解能量漏洞问题并解决容错问题。仿真结果表明，所提出的协议相对于性能指标（网络寿命，能效，数据包传递百分比和端到端延迟）表现出更高的性能。本文提出了一种支持多MDC的动态无线传感器网络的自适应分层数据分发（AHDD）机制，该机制可缓解能量漏洞问题并解决容错问题。仿真结果表明，所提出的协议相对于性能指标（网络寿命，能效，数据包传递百分比和端到端延迟）表现出更高的性能。