Adaptive Rate Control - Cryptographic Active Voice Transcoding (ARC-CAVT) based Congestion Control Technique for Voice over IP (VoIP) Communication
P. Bhuvaneswari
VoIP, Quality of service, packet loss, packet delay, jitter, Active Networks, Transcoding, Cryptography, Congestion.
The quality of bulky real time voice communication over an IP network degrades due to packet header overhead, network congestion and improper queuing strategies. These overheads affect the overall IP network performance and Qos parameters of voice communication such as packet loss, packet delay and packet latency or jitter. The IP Network achieves best effort service by using Integrated Services and Differentiated services. In this paper, we discuss how the active networking services are suitable to reduce the impact of congestion and provide on demand Qos service in an IP network. We present system architecture for the flow of voice packets in active networking services and propose an algorithm Adaptive Rate Control-Cryptographic Active Voice Transcoding (ARC-CAVT) for Congestion Control. During congestion periods our ARC-CAVT algorithm to be invoked using active packets at an active node in a secure manner, which automatically adjusts the network throughput and Qos parameters of voice communication. Then we analyze how the ARC-CAVT Congestion Control technique should adapts the network throughput generated by the voice packets in response to congestion while maintaining a steady voice data throughput in order to achieve effective QoS of VoIP applications where a smooth sending rate is of importance. Finally, we discuss the analytical results of the ARC-CAVT performance and show that our proposed ARC-CAVT algorithm would directly control congestion in the network and indirectly lead to fast bandwidth adaptation and minimize packet loss, packet delay and jitter.
Article Details
Unique Paper ID: 150723

Publication Volume & Issue: Volume 1, Issue 8

Page(s): 1700 - 1704
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