Policy-based End-to-End QoS Guarantee Using On-Path Signaling for Both QoS Request and Feedback

To guarantee network QoS, mechanisms and protocols for traffic resource reservation and those for measurement and feedback have conventionally been developed separately. The QoS parameters in reservation and feedback messages should coincide, and the mechanisms for these two can be similar. Therefore, we designed a protocol called SNSLP for both QoS request and feedback messages. SNSLP has a unified format for both and reduces the protocol complexity. SNSLP was implemented on the top of RTCP for both an experimental network with policy-based QoS control and a voice application called voiscape. In addition, an implementation method using routers without an SNSLP stack for policy-based routing is described and the result of implementation is reported.

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