Congestion control method for Internet of Things transmission

Abstract

The invention discloses a congestion control method for Internet of Things transmission in the technical field of network communication. On the basis of the draft CoCoA, every time when a sending end retransmits a CON message, the sending end repackages service data and allocates a new Message ID to obtain a message for retransmission; the sending end receives an ACK message from a receiving end and can uniquely determines the CON message triggering the ACK message; and the sending end receives the ACK message, can measure RTT obtained in the present communication and update the RTO by using the RTT so as to enhance the congestion control ability of the CoAP protocol. By adoption of the congestion control method disclosed by the invention, the probability of obtaining the RTT is also increased while the RTT measurement accuracy is improved, and the congestion control ability of the CoAP protocol can be effectively enhanced.

Description

technical field [0001] The present invention relates to the technical field of network communication, and in particular relates to a congestion control method based on Message ID and applied to Internet of Things transmission. Background technique [0002] IoT (Internet of Things, Internet of Things) further extends the network to physical entities other than traditional devices on the basis of the existing communication network. It connects various items in daily life (such as lights, air conditioners, furniture, etc.), allowing them to collect environmental information, "talk" to each other directly, change the state of the environment, and ultimately create a smarter environment. Thereby greatly improving people's quality of life. As a new generation of information technology, IoT has received more and more attention from academia and industry. [0003] Existing communication technologies cannot be directly applied to resource-constrained IoT devices, so major industry ...

AI Technical Summary

Problems solved by technology

If you directly use only one strong RTO estimator in TCP to obtain RTT, then the probability of obtaining the RTT value will be very low, thereby reducing the performance of congestion control;

[0007] (2) The congestion window is not suitable for IoT devices, and the Stop-and-wait ARQ method is the best choice for such devices

Although similar problems may occur in the implementation of the TCP protocol using this algorithm, it will not become an important factor affecting the congestion control performance of the TCP protocol in the existing communication network (the packet loss rate is relatively low)

However, in some LLN network environments (especially networks with severe packet loss rates), this will lead to the problem of overestimation of RTT, which will cause idle waiting at the sender and reduce bandwidth utilization.

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