Abstract
The aim of this paper is to present DCM+, a new congestion control protocol for data networks. It stands for Dynamic Congestion control for Mobile networks. New metrics have been newly invented and introduced like normalized advancing index (NAI) and complete transmission time (CTT). The simulations are done for a simple single-hop-topology (sender-router-receiver). The outcomes of this protocol are excellent and, in most cases, better than other approaches. The excellent properties of our proposed protocol were possible through tracking the available slow-start threshold. We achieved performance improvement, minimized end-to-end delay and large reduction in transmission time. DCM+ was able to combine many advantages at same time of the protocols NewReno and Westwood+. The results show, that DCM+ is extremely adequate for different types of networks. Feedback as main principle of control theory was used to control the congestion in the network. The parameters Round-Trip-Time (RTT) and Retransmission Timeout (RTO) are used as feedback signals to adjust the next congestion window (cwnd).
Highlights
It is vital to manage the congestion in the networks, especially those, that rely mainly on TCP traffic
We achieved performance improvement, minimized end-to-end delay and large reduction in transmission time
As a consequence of the congestion, the network will suffer a higher delay. We tied this idea of congestion with the parameters RTT and Retransmission Timeout (RTO), and we introduced a new parameter called congestion rate or rateCA, which is an important indicator for the congestion on the link
Summary
It is vital to manage the congestion in the networks, especially those, that rely mainly on TCP traffic. It helps achieve high performance and throughput. This will prevent the big collapse in the global networks like the internet [1] [2]. Congestion control exists as indispensable software module in most operating systems within the network stack [3] [4] [5] [6]. Many protocols have been proposed and implemented since ’86. Their role was to control the traffic between
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