Queuing Models of DATA-ACK Prioritization in TCP

• Main Authors: Chung-liang Kuo, 郭俊良
• Other Authors: 蔡碩仁
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/91419443007683229582

碩士 === 國立高雄第一科技大學 === 電腦與通訊工程研究所 === 100 === Regardless of wired or wireless comp. networks, Quality of Service (QoS) has much to do with priority. A TCP transmission is confirmed, successfully after the reception of its ACK. Hence, in a TCP session, The priority ACK affects transmission delays. Comparison of the priorities between TCP and ACK is helpful to achieve QoS. We analyze TCP-ACK using queuing models. Among queuing models, the reservation and polling one is suitable and is adopted to analyze the performance of TCP-ACK. We modify the queuing models of reservation and polling by adding the priority without preemption. We have two schemes, TCP > ACK (TCP has higher priority) and ACK > TCP (ACK priority is higher). Two queuing models are compared, and we find that the ACK > TCP scheme provides shorter delay and better QoS. In addition, the model is verified using NS2.