Details

Autor(en) / Beteiligte

• Jain, Vinesh Kumar
• Mazumdar, Arka Prokash
• Govil, Mahesh Chandra

Titel

CoAP Congestion Control: A Dynamic Send Rate based Approach

Ist Teil von

• 2021 IEEE 4th International Conference on Computing, Power and Communication Technologies (GUCON), 2021, p.1-6

Ort / Verlag

IEEE

Erscheinungsjahr

2021

Link zum Volltext

Quelle

IEEE/IET Electronic Library (IEL)

Beschreibungen/Notizen

• A common practice in the Internet of Things (IoT) is to integrate the Constrained Application Protocol (CoAP), a lightweight application layer protocol based on UDP (User Datagram Protocol), in its architecture. While UDP does not have any provision to control congestion at the transport layer, CoAP and its other variants, such as CoCoA and CoCoA+, get around this issue by employing their own congestion control mechanism, a send-rate-based congestion control technique, at the application layer. These techniques estimate the send-rate through Round Trip Time (RTT), however, fail to map acknowledgments and re-transmitted messages, leading to inaccurate RTT in case of bursty traffic and thus performs poorly. To tackle this problem, the article proposes novel a technique to regulate the send-rate considering the current and previous congestion ratio, congestion factor, and throughput. The proposed method aims to regulate the send-rate according to congestion level in the network. The performance measurements of the proposed approach show significant increments in goodput and fairness as compared to the techniques used in CoCoA+ and CoAP in burst traffic scenarios.