Sensor network virtualization enables the possibility of sharing common physical resources to multiple stakeholder applications. This paper focuses on addressing the dynamic adaptation of already assigned virtual sensor network resources to respond to time varying application demands. We propose an optimization framework that dynamically allocate applications into sensor nodes while accounting for the characteristics and limitations of the wireless sensor environment. It takes also into account the additional energy consumption related to activating new nodes and/or moving already active applications. Different objective functions related to the available energy in the nodes are analyzed. The proposed framework is evaluated by simulation considering realistic parameters from actual sensor nodes and deployed applications to assess the efficiency of the proposals.

翻译：传感器网络虚拟化使得多个利益相关应用能够共享公共物理资源成为可能。本文聚焦于解决已分配虚拟传感器网络资源的动态调整问题，以应对随时间变化的应用需求。我们提出了一种优化框架，该框架在考虑无线传感器环境特征与限制的同时，将应用动态分配到传感器节点中。该框架还考虑了因激活新节点或移动已有活跃应用而产生的额外能耗。针对节点可用能量的不同目标函数被加以分析。通过采用实际传感器节点与已部署应用的合理参数进行仿真评估，验证了所提方案的有效性。