Improving VoIP quality through path switching Export

@inproceedings{citeulike:1408918, abstract = {The current best-effort Internet cannot readily provide the service guarantees that VoIP applications often require. Path switching can potentially address this problem without requiring new network mechanisms, simply by leveraging the robustness to performance variations available from connectivity options such as multi-homing and overlays. In this paper, we evaluate the effectiveness and benefits of path switching in improving the quality of VoIP applications, and demonstrate its feasibility through the design and implementation of a prototype gateway. We argue for an application-driven path switching system that accounts for both network path characteristics and application-specific factors (e.g., codec algorithms, playout buffering schemes). We also develop an application path quality estimator based on the ITU-T E-model for voice quality assessment, and an application-driven path switching algorithm that dynamically adapts the time scales over which path switching decisions are made to maximize voice quality. Through network emulation and experiments over a wide-area multi-homed test bed, we show that, with sufficient path diversity, path switching can yield meaningful improvements in voice quality. Hence by exploiting the inherent path diversity of the Internet, application-driven path switching is a viable option in providing quality-of-service to applications.}, author = {Tao, S. and Xu, K. and Estepa, A. and Gao, T. F. L. and Guerin, R. and Kurose, J. and Towsley, D. and Zhang, Z. L.}, citeulike-article-id = {1408918}, citeulike-linkout-0 = {http://dx.doi.org/10.1109/INFCOM.2005.1498514}, citeulike-linkout-1 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1498514}, doi = {10.1109/INFCOM.2005.1498514}, journal = {INFOCOM 2005. 24th Annual Joint Conference of the IEEE Computer and Communications Societies. Proceedings IEEE}, keywords = {networks, overlay, path, switching, voip}, pages = {2268--2278 vol. 4}, posted-at = {2007-06-24 10:35:50}, priority = {0}, title = {Improving VoIP quality through path switching}, url = {http://dx.doi.org/10.1109/INFCOM.2005.1498514}, volume = {4}, year = {2005} }

TY - CONF ID - citeulike:1408918 L3 - citeulike-article-id:1408918 N2 - The current best-effort Internet cannot readily provide the service guarantees that VoIP applications often require. Path switching can potentially address this problem without requiring new network mechanisms, simply by leveraging the robustness to performance variations available from connectivity options such as multi-homing and overlays. In this paper, we evaluate the effectiveness and benefits of path switching in improving the quality of VoIP applications, and demonstrate its feasibility through the design and implementation of a prototype gateway. We argue for an application-driven path switching system that accounts for both network path characteristics and application-specific factors (e.g., codec algorithms, playout buffering schemes). We also develop an application path quality estimator based on the ITU-T E-model for voice quality assessment, and an application-driven path switching algorithm that dynamically adapts the time scales over which path switching decisions are made to maximize voice quality. Through network emulation and experiments over a wide-area multi-homed test bed, we show that, with sufficient path diversity, path switching can yield meaningful improvements in voice quality. Hence by exploiting the inherent path diversity of the Internet, application-driven path switching is a viable option in providing quality-of-service to applications. JF - INFOCOM 2005. 24th Annual Joint Conference of the IEEE Computer and Communications Societies. Proceedings IEEE EP - 2278 vol. 4 TI - Improving VoIP quality through path switching VL - 4 SP - 2268 KW - networks KW - overlay KW - path KW - switching KW - voip AU - Tao, S AU - Xu, K AU - Estepa, A AU - Gao, TFL AU - Guerin, R AU - Kurose, J AU - Towsley, D AU - Zhang, ZL PY - 2005/// UR - http://dx.doi.org/10.1109/INFCOM.2005.1498514 ER -