An Analysis of IoT Congestion Control Policies.

The Internet of Things (IoT) is common platform provide connectivity between various type of devices are having communication capability. Main objective of IoT is to deploy effective and high-quality smart services which offer different type services. Therefore, IoT need an advanced protocol stack which provides inter-communications between different types of devices have differet service requirements. IoT uses TCP and UDP as transport layer protocols to achieve the quality of service (QoS) required by different IoT devices. The XMPP (Extensible Messaging and Presence Protocol), MQTT (MQ Telemetry Transport) and RESTful HTTP are IoT application protocols which use TCP as a transport layer protocol. The transport layer protocol offers service point addressing, flow control, congestion control and segmentation, reassembling. As a number of different types of device increases over the Internet, network congestion also increases. In current internet scenario, TCP is responsible for congestion control over the Internet. However, current available TCP versions are not enough capable to handle different type of devices to fulfil the need of IoT. Therefore, this paper provides a survey of various congestion control algorithms used at transport layer. This paper includes available congestion control algorithms, their advantages, disadvantages and existing problems with TCP in IoT domains. [ABSTRACT FROM AUTHOR]