Abstract: A dynamic adjustment algorithm for threshold of connection number based on yield assessment was presented against the shortcoming of fixed value of concurrent limit connections in output gateways at present, which can get a most optimized threshold value by adjusting benefit values of valid connections and invalid connections. It can be used in different network preferences, can control the most invalid connections generated by P2P applications effectively and protect the effective use of diverse network applications.

Key words: connection limit, number of concurrent connection, Peer-to-Peer (P2P), dynamic adjustment, threshold

摘要： 针对目前出口网关中并发连接数限制的定值方法的缺点，提出了一种基于收益评估机制的动态调节并发连接数阈值算法。根据用户链路某个时间段内的并发连接数变化特征，可利用收益评估的方法计算出一个最优化的连接数限制阈值，利用该值调节用户链路的并发连接数。通过调节有效连接与无效连接的效益值可适用于不同的网络偏好，对对等网（P2P）应用产生的大量无效连接进行有效抑制，保障了网络应用多元化的高效使用，同时给出了工程实现算法。

关键词: 连接限制, 并发连接数, 对等网, 动态调节, 阈值