In a disaster or battlefield zone, rescue workers, soldiers, and other survivors (referred to as nodes) may need to survey damages and send images to the command and control center (the server) in a hop-by-hop fashion in the absence of any communication infrastructure. The server considers some area/landmark as the point of interest (POI) and distributes a request to the nodes to collect more information about them. Nodes take photos of POIs and share them with each other using the store and forward paradigm, also called Delay-tolerant Networks (DTNs), to send the photos to the server. Due to the highly intermittent contact characteristics of nodes in a DTN network and bandwidth and storage limitations, redundant photos need to be removed in this forwarding technique, whereas photos that cover different angles and views of the POIs need to be shared. Another challenge is that, over time, some server-listed POIs may not be of importance anymore, whereas some new POIs might be of more interest. In this work, we propose a scheme that is able to dynamically update the list of POIs based on the current photo metadata, with reduced consumption of the bandwidth, energy, and storage at DTN nodes by sending only important photos of POIs. In the performance evaluation, we show the scalability of our approach, and also show that it provides the same level of photo coverage but consumes much less energy and bandwidth than other related schemes.

在灾难或战场区域中，救援人员，士兵和其他幸存者（称为节点）可能需要调查损坏情况，并在不存在的情况下以逐跳的方式将图像发送到命令和控制中心（服务器）任何通信基础设施。服务器将某个区域/地标视为兴趣点（POI），并将请求分发给节点以收集有关它们的更多信息。节点拍摄POI的照片，并使用存储转发范式（也称为延迟容忍网络（DTN））将它们彼此共享，以将照片发送到服务器。由于DTN网络中的节点具有高度间歇性的接触特性以及带宽和存储限制，因此在此转发技术中需要删除多余的照片，而需要分享涵盖不同角度和POI视图的照片。另一个挑战是，随着时间的流逝，某些服务器列出的POI可能不再重要，而某些新的POI可能会变得更加有趣。在这项工作中，我们提出了一种方案，该方案能够基于当前的照片元数据动态更新POI列表，并通过仅发送重要的POI照片来减少DTN节点上的带宽，能量和存储消耗。在性能评估中，我们展示了我们方法的可扩展性，并且还表明它提供了相同水平的照片覆盖范围，但是与其他相关方案相比，其能耗和带宽要少得多。我们提出了一种方案，该方案能够基于当前的照片元数据动态更新POI列表，并通过仅发送重要的POI照片来减少DTN节点的带宽，能量和存储消耗。在性能评估中，我们展示了我们方法的可扩展性，并且还表明它提供了相同水平的照片覆盖范围，但是与其他相关方案相比，其能耗和带宽要少得多。我们提出了一种方案，该方案能够基于当前的照片元数据动态更新POI列表，并通过仅发送重要的POI照片来减少DTN节点的带宽，能量和存储消耗。在性能评估中，我们展示了我们方法的可扩展性，并且还表明它提供了相同水平的照片覆盖范围，但是与其他相关方案相比，其能耗和带宽要少得多。