QL－PAUSE：基于队列长度的PAUSE算法

以太网是目前使用最为广泛的局域网技术，由于采用了冲突检测和随机后退的MAC协议，基于CSMA／CD的半双工以太网不需要采用特殊的流量控制技术。随着快速以太网和以太网交换机的出现，如何有效管理全双工环境下以太网交换机以及网络的带宽资源成为日益突出的问题。该文针对IEEE定义的PAUSE操作，提出了基于队列长度的PAUSE（QL－PAUSE）算法，并通过仿真和分析证明该方法可以简洁有效地实现全双工以太网中的流量控制。

Ql-ause: A queue length-based pause algorithm

Ethernet is a widely deployed LAN technology. With carrier sensing and the corresponding collision backoff, traditional half duplex Ethernet with CSMA/CD does not need any other explicit flow control method. With the appearance of fast Ethernet and Ethernet switch, how to efficiently use and maintain network bandwidth and the resource of Ethernet switch in full duplex Ethernet is a key issue. In this paper, a queue length-based PAUSE algorithm, QL-PAUSE, is proposed which implements IEEE PAUSE operation based on input queue length. And through simulations, it is shown that QL-PAUSE can provide flow control and resource management in full duplex Ethernet, while achieving better performance and higher throughput.