发明名称 |
Excessive flow detection device, excessive flow detection circuit, terminal apparatus and network node |
摘要 |
A packet information extraction circuit derives predetermined key information (for example, destination information or transmission source information) from a received packet. A HASH result computation circuit generates m (a plurality of) pseudo-random numbers (HASH results) of fixed length from the derived information. A cache table holds the key information and cumulative packet lengths within a predetermined time period by using the generated pseudo-random numbers as addresses. When a threshold value holding and comparing circuit senses that the cumulative packet length has exceeded a value held therein, it sends a notification signal to judgment means disposed in a packet exchange system. The key information items and the cumulative values of the packet lengths are stored in the cache table on the basis of the received packets in such a way that larger cumulative packet lengths are left behind, whereas smaller cumulative packet lengths are erased.
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申请公布号 |
US7953007(B2) |
申请公布日期 |
2011.05.31 |
申请号 |
US20080022436 |
申请日期 |
2008.01.30 |
申请人 |
ALAXALA NETWORKS CORPORATION |
发明人 |
AIMOTO TAKESHI;WATANABE YOSHINORI |
分类号 |
H04L12/56 |
主分类号 |
H04L12/56 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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