本文關(guān)鍵詞： 循環(huán)冗余校驗(yàn) G以太網(wǎng) 并行 循環(huán)冗余校驗(yàn)?zāi)?shù) 門延時(shí) 邏輯資源　出處：《計(jì)算機(jī)工程》2016年05期 　論文類型：期刊論文

【摘要】：現(xiàn)有10G以太網(wǎng)中的循環(huán)冗余校驗(yàn)(CRC)編譯碼器不能同時(shí)兼顧計(jì)算速度與資源占用,為此,設(shè)計(jì)一種新型的10G以太網(wǎng)并行CRC編譯碼器。編碼時(shí),通過編碼預(yù)處理解決不定長(zhǎng)字節(jié)帶來的CRC編碼問題,簡(jiǎn)化CRC編碼電路的設(shè)計(jì)。譯碼時(shí),通過譯碼預(yù)處理分離出以太網(wǎng)幀的幀校驗(yàn)序列(FCS)域,恢復(fù)編碼預(yù)處理模塊輸出的數(shù)據(jù),簡(jiǎn)化CRC校驗(yàn)電路的設(shè)計(jì)。在實(shí)現(xiàn)CRC編碼校驗(yàn)時(shí)對(duì)傳統(tǒng)的異或運(yùn)算電路進(jìn)行優(yōu)化,降低運(yùn)算電路門延時(shí),提高運(yùn)算速度,并能自動(dòng)切換CRC編碼校驗(yàn)方法以兼容現(xiàn)有以太網(wǎng)。實(shí)驗(yàn)結(jié)果表明,與其他3種方法相比,該方法占用邏輯資源少,計(jì)算速度快,可實(shí)現(xiàn)實(shí)時(shí)性輸出,同時(shí)滿足10G以太網(wǎng)156.25 MHz的時(shí)序要求。
[Abstract]:In the present 10G Ethernet, the cyclic redundancy check (CRC) encoder and decoder can not take into account the computation speed and the resource occupation simultaneously. Therefore, a new 10G Ethernet parallel CRC encoder and decoder is designed. In order to simplify the design of the CRC coding circuit, the CRC coding problem caused by the constant length bytes is solved by the encoding preprocessing. In decoding, the frame check sequence (FCS) domain of the Ethernet frame is separated by the decoding preprocessing, and the output data of the encoding preprocessing module is recovered. To simplify the design of CRC check circuit, optimize the traditional XOR operation circuit when realizing CRC code check, reduce the delay of operation circuit gate, and improve the operation speed. It can automatically switch the CRC coding verification method to compatible with the existing Ethernet. The experimental results show that compared with the other three methods, the proposed method takes less logical resources, has the advantages of fast computing speed, and can realize the real-time output. At the same time, it meets the timing requirement of 10G Ethernet 156.25 MHz.
【作者單位】： 暨南大學(xué)信息科學(xué)技術(shù)學(xué)院;
【基金】：廣東省科技計(jì)劃基金資助項(xiàng)目(2013B090800022) 廣東省工程技術(shù)研究中心基金資助項(xiàng)目(2012gczxA003)
【分類號(hào)】：TP393.11
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本文編號(hào)：1532279