| Summary: | 碩士 === 國立政治大學 === 資訊科學系 === 107 === The communication and management mechanisms of smart things are essential issues in the age of the internet of everything. Among these mechanisms, the discovery of smart things is one of the most critical issues. mDNS/DNS-SD is a widely deployed, lightweight, and highly flexible service discovery protocol. However, its performance is unsatisfactory, and it lacks the service description function. In this research, the research uses Web Thing Model to develop a complementary solution for mDNS/DNS-SD. Besides, the proposed approach is more compact so that the efficiency is better than the original protocol. Also, this research develops a simple filtering expression, which is fully compatible with DNS-SD, to specify the types and attributes of smart things. To evaluate the proposed approach, the experiments on attribute matching, throughput, and memory usage are conducted. Discussions and lessons learned from the experiments are also reported. The results indicate that the performance is better than the original mDNS/DNS-SD and is highly compatible with it. On the other hand, the proposed approach is also compared to a popular service discovery protocol called UPnP (Universal Plug and Play), the result also shows that the proposed approach is better than UPnP both in the memory consumption and throughput.
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