Message Dissemination for Throughput Optimization in Storage-Limited Opportunistic Underwater Sensor Networks

摘要

Opportunistic underwater sensor networks (OUSNs) are developed for a set of underwater applications, including underwater creatures tracking and tactical surveillance. However, the storage capacity of nodes is sometimes insufficient, especially compared to a wealth of data messages which are generated rapidly in some emergency response applications. Therefore, the network throughput should be taken as one of the primary objectives of message dissemination. To this end, the strategies for message storing, disseminating and discarding are investigated, and a Message Dissemination Approach for Storage-Limited (MDA-SL) OUSNs is proposed hereby. In MDA-SL, the messages are preferred to be disseminated to the nodes with higher speed or larger residual storage. In addition, the newer messages are inclined to be discarded when their holders' storage is full. Furthermore, through simulation analysis, the performance of MDA-SL is proved excellent, which indicates that MDA-SL achieves a satisfactory throughput with the propagation delay being restricted according to application requirements.