Performance Evaluation of CoAP Communication for Web Service of Internet-of-Things Devices 


Vol. 44,  No. 8, pp. 1527-1534, Aug.  2019
10.7840/kics.2019.44.8.1527


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  Abstract

Employment of devices such as WSN nodes, which have low computing power and limited memory size, has been increased more in various IoT applications. In order to get those devices with limited capabilities connected into Internet, IETF proposed light-weighted standard communication protocol, CoAP. However, reliable communication is unlikely to be achieved with CoAP because it adopts UDP instead of TCP as the Transport Layer protocol. To cope with this flaw, IETF proposed confirmable(CON) message type, where a recipient of CON message type has to reply with response message. In addition, if there is no response from the recipient within predefined time, the sender goes through re-transmission process. The timeout value is set into RTO parameter of CoAP. Nevertheless, communication delay in the worst case is more than 10 times average delay time. It happens during re-transmission process to deal with communication error, which can cause a serious problem in real-time IoT applications.

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  Cite this article

[IEEE Style]

Y. Ha and Y. Choo, "Performance Evaluation of CoAP Communication for Web Service of Internet-of-Things Devices," The Journal of Korean Institute of Communications and Information Sciences, vol. 44, no. 8, pp. 1527-1534, 2019. DOI: 10.7840/kics.2019.44.8.1527.

[ACM Style]

Yong-jun Ha and Young-yeol Choo. 2019. Performance Evaluation of CoAP Communication for Web Service of Internet-of-Things Devices. The Journal of Korean Institute of Communications and Information Sciences, 44, 8, (2019), 1527-1534. DOI: 10.7840/kics.2019.44.8.1527.

[KICS Style]

Yong-jun Ha and Young-yeol Choo, "Performance Evaluation of CoAP Communication for Web Service of Internet-of-Things Devices," The Journal of Korean Institute of Communications and Information Sciences, vol. 44, no. 8, pp. 1527-1534, 8. 2019. (https://doi.org/10.7840/kics.2019.44.8.1527)

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pISSN : 1226 - 4717
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