Delay Guarantee by Adaptive Weighted Fair Queue in Real Time VoIP Environments

Abstract

延遲保證在VoIP網路環境中扮演著舉足輕重的關鍵因素,尤其對即時系統(例如語音通信)由傳輸起點至接收點之最佳延遲為網路設計者夢寐以求之技術.此篇論文對異質性話務應用加權技巧提出延遲最佳化之方法,其貢獻著眼於達成系統總延遲之最小化要求。

This paper provides an optimal delay discipline for real time latency guarantees in VoIP environments. System resources are properly divided for delay optimization due to various traffic loads. We investigate the optimal delay guarantees of weighted fair queueing. In our approach, network resource is allocated according to the factor of weight-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. Our contribution is focused on minimizing the system delay due to heterogeneous input traffics and the total system delay is significantly improved.