Performance Evaluation of TinyCoAP Protocol in WSNs Application from Latency, Power Consumption and Memory Occupation Perspective

Abstract

The Constrained Application Protocol (CoAP) is used with TinyOS which called TinyCoAP to give the same features of HTTP while keeping a simple design and low overhead. TinyOS already have another implementation of CoAP in its distribution called CoapBlip.However, it’s a library doesn't meet the requirements ofTinyOS.TinyCoAP and CoapBlip are evaluated using Avrora and TOSSIM simulations, as well as implementations based on HTTP. The evaluation is performed in terms of latency, memory occupation, and energy consumption. It shows that TinyCoAPhas the best performance in most parameters comparing it with other implementations. TinyCoAP shows important development in performance compared with CoapBlip which is limited by the implementation of dynamic RAM memory allocation and the use of an external C library. HTTP/TCP has the worst performance than that obtained by TinyCoAP. The performance of TinyCoAP is same as HTTP/UDP but with high reliability.