The Research of Differentiated Service Network Architecture

• Main Authors: Yue Chin Hsu, 許約欽
• Other Authors: Chyou Hwa Chen
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/35333423892241551342

碩士 === 國立臺灣科技大學 === 資訊工程系 === 92 === Quantitative Assured Service aims to take care of Internet about bandwidth allocation and satisfying user Service Level agreements. Among those techniques, Dynamic Core Provisioning is a new mechanism that using core node traffic information to allocate resources dynamically. It mainly provides delay service guarantee while user are transmitting packets through core network. In this framework, core node calculates a service rate according to the buffer occupation and packet arrival rate while maintaining delay bound, use the service rate as the weight to be used by Weight Round Robin Scheduler. At the same time, we calculate a new Buffer size to eliminate loss occurrence under the constraint of delay. If the available bandwidth is not enough to satisfy all user, it calculates an allowable rate to restrict the traffic into the core domain; or when the bandwidth is available but wasted, calculates a new bandwidth to allow more traffic to get into the core network. Edge router is responsible for metering traffic and dropping packets for each class. In this paper, we fix the calculation of the re-alignment algorithm to attain the expected consequence of bandwidth re-allocation while redundant bandwidth is available. We also replace the scheduler with Guaranteed Rate (GR) scheduling and expect to get better performance. Last, we design several experiments to compare with the original one and arrival a conclusion.