Smart SoftPhone Device for the Network Quality Parameters Discovery and Measurement

摘要

Due to the shared nature of current network structures, guaranteeing the quality of service (QoS) of Internet applications from an end-to-end is sometimes difficult and then it has been requested to develop smart devices which have multi-modal functionality for ubiquitous network and computing environment. In this paper, we design smart SoftPhone device for guaranteeing QoS which can discover and measure various network parameters during realtime phone-call service through IP network. The smart SoftPhone for discovering and measuring of QoS-factors in realtime consists of four main blocks that is in order to control and measure various parameters independently based on UDP/SIP/RTP protocol during the end-to-end voice service. Also, we provide critical message report procedures and management schemes to guarantee QoS based on using smart SoftPhone device. For the reporting quality parameters optimally during establishing call sessions of VoIP service, we design critical management module blocks for call session and for quality reporting. To sum up, for the performance evaluation of the smart SoftPhone with scientific exactitude of quality factors, we examine the proposed technique based on the realtime phone-call service through heterogeneous network. The experimental results confirm that the developed smart SoftPhone is very useful to quality-measuring for the quality guaranteed realtime VoIP service and then it could also be applied to improve speech quality as a packet compensation device.