Experimental assessment of VoIP quality in MIPv6 and SIP mobility scenarios

Portolés-Comeras, Marc; Cardenete-Suriol, M.; Mangues‐Bafalluy, Josep; Requena‐Esteso, Manuel; Hersant, Loic

doi:10.1109/icc.2006.255071

Cited by 5 publications

(1 citation statement)

References 24 publications

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“…[8] assesses the QoS of SIPbased mobile service, but does not provide methods for improvement. In [9], an admission controller is built based on application specific policy and call authorization status.…”

Section: Related Workmentioning

confidence: 99%

Flow Management for SIP Application Servers

Sun

Hu²,

Tian³

et al. 2007

2007 IEEE International Conference on Communications

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In this paper, we study how to build a front-end flow management system for SIP application servers. This is challenging because of some special characteristics of SIP and SIP applications. 1) SIP flows are well organized into sessions. The session structure should be respected when managing SIP flows. 2) SIP has been adopted by telecom industry, whose applications have more critical QoS requirements than WEB ones. 3) SIP message retransmissions exacerbate the overload situation in case of load bursts; moreover, they may trigger persistent retransmission phenomenon, which retains large response times even after the original burst disappears. To address the combination of these challenges, we propose a novel front-end SIP flow management system FEFM. FEFM integrates concurrency limiting, message scheduling and admission control to achieve overload protection and performance management. It also devises some techniques such as response time prediction, twin-queue scheduling, and retransmission removal to accomplish SLA-oriented improvement, reduce the call rejection rate and banish the persistent retransmission phenomenon. Intensive experiments show that FEFM achieves overload protection in burst period, improves performance significantly, and has the ability to compromise different tradeoffs between throughput and SLA satisfaction.

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Section: Related Workmentioning

confidence: 99%