Comparison between fixed and moving control system algorithms to reduce loss in data and voice applications through the Internet
Mohamed S. kuafi, Salwa Almoshity, Abdulsalam Mohammed · 2021
Voice over Internet Protocol (VoIP) is a modern way to communicate. It is a technology that allows users to make phone calls over an IP network. This is due to the high cost of communication via cellular phones, so it was necessary for telecommunications companies to develop this technology and add services that are cost-effective and provide the appropriate service. This paper focuses on the effect of packet loss on quality of service. Voice packets may be dropped and voip guarantees high-quality voice transmission only if signal packets and voice channels have priority over other types of network traffic. This paper provides a brief introduction to improve the performance for the network and enhance the voice quality by control the threshold parameter in the buffers and minimize the packet loss through VOIP networks. Buffer Jitter is a common data area where audio packets can be collected, stored, and sent to the sound processor at evenly spaced intervals. In this paper, an algorithm is proposed for the buffer management scheme called push out with constant threshold (PDT) of the common buffer switch. As well as an investigation of the performance of the buffer threshold scheme by simulation. This scheme regulates the use of the shared buffer space through the use of a fixed-threshold packet acceptance. Also, an algorithm has been developed to improve the adaptive buffer allocation scheme for traffic based on the loss of successive packets in the data flow and the buffer occupancy level by making the buffer threshold dynamic. The buffer is designed to allow the input traffic to be divided into different priority classes and based on the behavior of the input traffic controls the threshold dynamically. The results of this research by comparing the static and dynamic buffer threshold algorithm show an improvement in sound quality by reducing the loss of successive packets. Congestion across the network can be reduced by using the modified MSPBs scheme. The modified MSPBs scheme not only improves voice quality and reduces packet loss, but also increases network efficiency.