Internet of Things (IoT) is the interconnection of thousands of heterogeneous addressable smart objects (i.e., devices embedded with sensors and actuators) with Internet connectivity. Internet of Mobile Things (IoMT) is characterized by considering the mobility of smart objects. For managing smart objects, it is necessary to provide a middleware. Mobile Hub (M-Hub) is an IoT middleware that collects, processes and distributes data from a large number of smart objects on the edge of the network. M-Hub runs on mobile devices, enabling them to be gateways. It represents an autonomous entity, able to detect a set of objects available in the neighborhood and to monitor them independently of other M-Hubs. Hence, in some situations it may happen that a same object is eligible to be monitored by several M-Hubs. In this context, this paper proposes Neighborhood-aware M-Hub (NAM-Hub), a leader election mechanism integrated to the M-Hub to determine a suitable gateway for each smart object discovered opportunistically. It considers context data gathered from the mobile device to dynamically elect leaders (i.e., a leader and a sub-leader). The proposed solution contributes to take advantage from the resources provided for the mobile gateway and avoids their wastage. The proposed leader election mechanism was tested and evaluated considering its performance and the results were promising, with short detection time and recovery time in the system.

物联网（IoT）是数以千计的异构可寻址智能对象（即，嵌入传感器和执行器的设备）与Internet的互连。移动物联网（IoMT）的特征在于考虑了智能对象的移动性。为了管理智能对象，有必要提供一个中间件。移动集线器（M-Hub）是一种IoT中间件，可从网络边缘上的大量智能对象收集，处理和分发数据。M-Hub在移动设备上运行，使它们成为网关。它代表一个自治实体，能够检测附近的一组可用对象并独立于其他M-Hub进行监视。因此，在某些情况下，可能会发生同一对象适合由多个M-Hub监视的情况。在这种情况下，本文提出了邻居感知M-Hub（NAM-Hub），一种与M-Hub集成的领导者选举机制，可以为机会发现的每个智能对象确定合适的网关。它考虑了从移动设备收集的上下文数据以动态选举领导者（即领导者和子领导者）。所提出的解决方案有助于利用为移动网关提供的资源，并避免浪费资源。考虑到其性能，对建议的领导者选举机制进行了测试和评估，结果令人鼓舞，而且系统中的检测时间和恢复时间都很短。它考虑了从移动设备收集的上下文数据以动态选举领导者（即领导者和子领导者）。所提出的解决方案有助于利用为移动网关提供的资源，并避免浪费资源。考虑到其性能，对建议的领导者选举机制进行了测试和评估，结果令人鼓舞，而且系统中的检测时间和恢复时间都很短。它考虑了从移动设备收集的上下文数据以动态选举领导者（即领导者和子领导者）。所提出的解决方案有助于利用为移动网关提供的资源，并避免浪费资源。考虑到其性能，对建议的领导者选举机制进行了测试和评估，结果令人鼓舞，而且系统中的检测时间和恢复时间都很短。