CAJ | 학술논문

在易错网络中传输IP(因特网协议)数据包时,除了网络拥塞之外,信道误码也容易导致数据包丢失.丢包对信源恢复会造成较大影响.为了降低误码导致的丢包率,该文研究了IPv4协议解码的可靠性问题,分析了IPv4(因特网协议版本4)协议各字段之间的相关性,建立了IPv4协议容错解码的理论模型,利用最大后验概率推导出容错解码的准则.在该基础上提出一种以分段方式估计协议字段的算法,实验结果表明该算法大大增强了IPv4协议解码的纠错能力.
재역착망락중전수IP(인특망협의)수거포시,제료망락옹새지외,신도오마야용역도치수거포주실.주포대신원회복회조성교대영향.위료강저오마도치적주포솔,해문연구료IPv4협의해마적가고성문제,분석료IPv4(인특망협의판본4)협의각자단지간적상관성,건립료IPv4협의용착해마적이론모형,이용최대후험개솔추도출용착해마적준칙.재해기출상제출일충이분단방식고계협의자단적산법,실험결과표명해산법대대증강료IPv4협의해마적규착능력.
When transmitting Internet protocol (IP) packets over error-prone networks, bit error can cause packet loss besides network congestion. Packet loss makes a strong impact on source recovery. For the sake of decreasing packet loss ratio, we consider the problem of error resilient decoding for internet protocol version 4 (IPv4). The correlation between fields in IP packet header is analyzed, a mathematical model for error resilient IPv4 decoding, and the error resilient decoding criterion using maximum a posterior (MAP) is deduced. Based on the decoding is constructed criterion, a novel error resilient decoding algorithm is proposed for IPv4 in segmenting form. Experimental results show that the algorithm can enhances the abilities of correcting errors significantly.