A Resource-Saving TCAM Structure Based on SRAM

Although ternary content-addressable memory (TCAM) has a faster search speed, its power consumption and scalability is significantly poor compared to SRAM, so many SRAM-based TCAM structures have been proposed. Existing SRAM-based TCAMs reduce the power consumption but consume a lot of SRAM resources. In this paper, a resource-saving SRAM-based TCAM (RS-TCAM) structure is proposed, which can effectively reduce the amount of the SRAM by means of encoding and compressing the data in the coding region. Experimental results based on the real routing table data and Xilinx virtex-7 FPGA show that RS-TCAM uses less 10.94% SRAM than the UE-TCAM.