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Zhu G.-S.,Huazhong University of Science and Technology | Yu S.-H.,Huazhong University of Science and Technology | Yu S.-H.,Wuhan Research Institute of Posts and Telecoms
Tongxin Xuebao/Journal on Communications | Year: 2011

Hish speed deep packet inspection using TCAM faces the problem of high power dissipation. A 2-phase DPI method BF-TCAM was proposed. The first phase used parallel Bloom filters to exclude the normal packets not including attack signatures. The second phase used TCAM to inspect suspicious packets including real attack packets and false positive packets of the first phase. The Bloom filters' false negative probability is zero and false positive probability is very low. Since most of the network data traffic does not include attack signatures, the method can get high speed deep packet inspection with low power dissipation. Source


Xu N.,Huazhong University of Science and Technology | Xu N.,Wuhan Research Institute of Posts and Telecoms | Yu S.-H.,Huazhong University of Science and Technology | Yu S.-H.,Wuhan Research Institute of Posts and Telecoms | Wang X.-S.,Wuhan Research Institute of Posts and Telecoms
Tien Tzu Hsueh Pao/Acta Electronica Sinica | Year: 2012

The combined-input-crosspoint-queued switch is constrained by the delay of flow control and speedup for output-queued Switch emulation. A pure crosspoint-queued switch does not achieve good throughput performance under non-uniform traffic pattern. A type of switch architecture, load-Balanced crosspoint-queued switch, is proposed. By a load-balanced processing with pre-determined patterns at extra switch fabric stage, the non-uniform traffic arriving at input port is transformed into uniform traffic and distributed evenly to every small cross-point buffer at switch fabric and corresponding to the same input port, which can lead to simpler scheduling and better QoS performance. Analysis shows the stability of such architecture and numerical results show that this switch architecture achieves approximately delay performance as output-queued switch without internal acceleration and much better throughput than pure crosspoint-queued switch under non-uniform traffic. Source

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