Optimum latency guarantee by using weighting methods in real time VOIP

Abstract

In modern VoIP (Voice over Internet Protocol) communications, providing adequate bandwidth for latency guarantees due to real time environments is a stringent issue. In this paper system resources (e.g., bandwidth) are properly divided for delay optimization due to various traffic loads. A generic scheme in achieving optimal delay guarantees by using weighted fair queueing method is proposed. In our approach, network resource is allocated according to the value of queue-length product. The numerical results demonstrate that the optimal delay can be achieved under the proposed bandwidth allocation scheme. The proposed scheme has the advantages both on delay optimization and easy implementation. The policy depicted here meets the requirements of minimum delay under various traffic types and this will be beneficial on solving the stringent problem of delay guarantees in voice communications encountered in modern Internet networks. The main contribution of our approach is focused on adequately dividing the system resources to significantly improve the system delay due to heterogeneous input traffics.