中文摘要：

物联网现有的基于节点标识的寻径机制只能提供基本的传输可达性,在面向内容的监控及通告场景中传输效率较低.针对物联网最典型的树型拓扑结构,提出了基于传感内容的寻径模型（Routing Model based on Sensor Content,ROC）,以子树为单位定期收集、汇聚传感内容值,并在树型结构中逐层实施.设计了物联网内容组播和内容任播消息的高效通告方法,利用内容寻径规则精准高效地传送消息到满足条件的节点.理论分析及真实节点组网实验验证了ROC模型能以较低的带宽和存储代价实现高效的内容寻径.根据内容敏感范围,提出了基于最大子树的节点休眠机制,可延长部分节点休眠时间.ROC模型与已有的基于节点标识的物联网路由机制完全兼容,可叠加实施,互不干扰.

英文摘要：

In the Internet of Things（IoT）,the existing routing mechanisms based on node identity only provide the elementary reachability of network transmission,which is of low efficiency in the scenarios of content-based supervising and notification.A Routing Model based on Sensor Content（ROC）is proposed for the typical tree topology in IoT.In ROC,sense data can be collected and aggregated periodically base on sub tree,which is implemented layer by layer in the tree.Moreover,we design an efficient notification method for content multicast and content anycast in IoT,which can accurately transfer messages to the nodes meeting specific conditions according to the content routing rules.The theoretical analysis and experiments based on real sensor nodes verify the efficient content routing with low cost of storage and bandwidth.In addition,node sleeping mechanism in view of maximal sub-tree is designed according to sensitive range of sensing content.It can provide longer sleeping time for partial nodes without time synchronization.ROC is fully compatible with the current identity-based routing mechanisms in IoT,and they can work together without mutual interferences.