基于漏桶的内容适配系统接纳控制

综合终端特征、内容对象语义特征和通信特征,根据系统负载情况估计用户感受到的服务质量,作为接纳控制的依据,并引入漏桶模型和PID控制法进行反馈控制,从而解决了在网页内容适配系统对内容进行动态适配时,由于异构用户服务请求的系统资源需求特征差异很大,导致适配资源耗费过大,难以有效进行的问题。理论说明和仿真测试结果表明该方法从一定程度上提高了用户的主观服务质量,为内容适配的接纳控制研究做出了有益的探索。

Leak bucket based admission control for content adaptation system

Web server do content adaptation according to the characteristic parameters along with the user request.It would cost more system resource once in a heterogeneous environment where the request varied greatly.To avoid the overload of server,admission control technique must be adopted.Based on combining the terminal characteristic,seman-tic characteristic of content object and communication characteristic,user perceived Web page quality under real-time system load was evaluated and used as a reference in admission control.The leak bucket model and PID(proportional-integral-derivative) method were linked together to construct a feedback control loop.Technical analy-sis and analog simulation validate the feasible of the mechanism,and the QoS user achieved are improved in some degree.It opened up new vista of research for this research direction.