QoS Provisioning Strategy for QoS-Unaware Applications in an IntServ/DiflServ Interoperating Network

摘要

Due to the demands for variety of services in the Internet, the quality assurance and reliability in IP network have been increasingly important. DiffServ is a scalable QoS-enabled architecture proposed to be an Internet core network. The network has to provide both new QoS-aware and legacy QoS-unaware applications with appropriate resources provisioning. Admission control is a key component to achieve this goal. However, most of the proposed admission control algorithms support only QoS-aware applications, even though most of the current Internet applications are QoS-unaware.rnThis work proposes an admission control algorithm for providing QoS guaranteed services to QoS-aware applications and special marking to QoS-unaware applications when the network is in light-load situation. The proposed algorithm utilizes the analyzable curve-based calculation for both admission control and special marking decision.rnThe simulation results show that the proposed algorithm can provide the deterministic QoS guarantees to QoS-aware applications as well as QoS-unaware applications without any QoS degradation.