Through calculating the average queue size, Random Early Detection (RED) algorithm can drop packets with relevant probability, so congestion resulted from TCP flows can be avoided.
随机早检测算法通过计算TCP流的平均队列长度，进行适当的概率丢弃分组，从而有效地避免了由TCP流导致的网络拥塞。
Usually in the process of congestion control there are several methods, in which includes Tail Drop First In Out (TD-FIFO) method and Random Early Detection method (RED).
路由器在处理拥塞时，一般采用尾部丢弃TD-FIFO算法和随机早期丢弃RED算法。通常把网络载荷分为正常、拥塞避免和拥塞三个阶段，并在拥塞避免阶段开始采取行动。
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