A new TCAM range matching method called C-TCAM (compressed TCAM) was proposed. Firstly C-TCAM could compress two expanded TCAM entries into one and get the expansion factor of w-l and w-2 respectively in the worst case. Secondly, a new TCAM matching algorithm to lower down the power dissipation was designed by avoiding matching of unnessary TCAM entries. Analysis and simulation showed that C-TCAM gets advantages over other schemes in TCAM space efficiency and power dissipation.%提出一种基于TCAM的范围匹配方法——C-TCAM(compressed TCAM).空间方面,通过二级压缩存储,C-TCAM可以将2个扩展后的TCAM表项压缩成一个,最坏情况下范围扩张因子为W-1或者W-2,提高了空间利用率；功耗方面,通过一种新的TCAM查找算法来避免无效表项参与比较从而降低了功耗；分析和仿真显示C-TCAM方法在实现性能分组分类的同时在空间利用率、功耗等方面具有优势.
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