IoT 23(1): e2

Research Article

Avoiding Congestion for Coap Burst Traffic

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  • @ARTICLE{10.4108/eetiot.v9i1.2655,
        author={Thi Thuy Duong Le and Dang Hai Hoang and Thieu Nga Pham},
        title={Avoiding Congestion for Coap Burst Traffic},
        journal={EAI Endorsed Transactions on Internet of Things},
        keywords={Congestion control, Internet of Things, Rate control},
  • Thi Thuy Duong Le
    Dang Hai Hoang
    Thieu Nga Pham
    Year: 2023
    Avoiding Congestion for Coap Burst Traffic
    DOI: 10.4108/eetiot.v9i1.2655
Thi Thuy Duong Le1, Dang Hai Hoang2,*, Thieu Nga Pham1
  • 1: University of Civil Engineering, Hanoi, Vietnam
  • 2: Posts and Telecommunications Institute of Technology, Hanoi, Vietnam
*Contact email:


Congestion is an important issue in Internet of Things (IoT) networks with constrained devices and a growing number of applications. This paper investigated the problem of congestion control for burst traffic in such networks. We highlight the shortcomings of the current constrained application protocol (CoAP) in its inability to support burst traffic and rate control. Subsequently, we propose an analytical model for CoAP burst traffic and a new rate-control algorithm for CoAP to avoid congestion. A CoAP sender increases or decreases the transmission rate depending on the congestion detection. Using simulations, we compared the performance of the proposed algorithm with the current CoAP in various traffic scenarios. Experimental results show that the proposed algorithm is efficient for burst traffic and provides better performance in terms of delay, throughput, retransmission, packet duplication, and packet loss compared to CoAP.