A New Scheme for Improving the Quality of Service in Heterogeneous Wireless Network for Data Stream Sending

In this paper, we first consider the quality of service problems in heterogeneous wireless networks for sending the video data, which their problem of being real-time is pronounced. At last, we present a method for ensuring the end-to-end quality of service at application layer level for adaptable sending of the video data at heterogeneous wireless networks. To do this, mechanism in different layers has been used. We have used the stop mechanism, the adaptation mechanism and the graceful degrade at the application layer, the multi-level congestion feedback mechanism in the network layer and connection cutting off decision mechanism in the link layer. At the end, the presented method and the achieved improvement is simulated and presented in the NS-2 software.

Authors:

• Ebadollah Zohrevandi
• Rasoul Roustaei
• Omid Moradtalab

Keywords:

• Congestion
• Handoff
• Heterogeneous wireless networks
• Adaptation mechanism
• Stop mechanism
• Graceful degrade.

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