Dynamic Quota-Based Admission Control with Sub-Rating in Multimedia Servers

An admission control algorithm for a multimedia server is responsible for determining if a new request can be accepted without violating the Quality of Service (QoS) requirements of the existing requests in the system. A novel quota-based admission control algorithm with sub-rating for two priority classes of requests is proposed in this study. The server capacity is divided into three partitions based on the quota values: one for each class of requests and one common pool shared by two classes of requests. Reward and penalty are adopted in the proposed system model. High-priority requests are associated with higher values of reward as well as penalty than low-priority ones. Given the characteristics of the system workload, the proposed algorithm finds the best partitions, optimizing the system performance based on the objective function of the total reward minus the total penalty. The sub-rating mechanism will reduce the QoS requirements of several low- priority clients, by cutting ou...

• Type: Journal
• Year: 2000
• Where: MMS
• Authors: Sheng-Tzong Cheng, Chi-Ming Chen, Ing-Ray Chen
• Keywords: Admission Control, Algorithm, Information Technology, MMS 2000, Server Capacity