匹配位置對比特流隨機(jī)性的影響研究

本文闡述了IP 報文標(biāo)識字段比特流隨機(jī)性的評價標(biāo)準(zhǔn)，通過對大量實測報文進(jìn)行統(tǒng)計分析證明了比特流的匹配位置對隨機(jī)測度值有一定影響。結(jié)果表明，標(biāo)識字段比特流隨機(jī)測度值隨著比特流長度的增加整體上呈遞減趨勢。對相同長度的比特流而言，右優(yōu)先比特流隨機(jī)測度值普遍最高，左優(yōu)先比特流隨機(jī)測度值普遍最低，其它位置比特流隨機(jī)測度值普遍介于兩者之間。
關(guān)鍵詞：隨機(jī)測度；比特流；標(biāo)識字段；IP 報文
This paper expounds the evaluation standards for bit flow randomicity of IP message
identification field. By accounting and analysing a large number of messages,it is proved that
the matching position effects bit flow random metric. The result of the experiment shows that
with the increase of the length ,the random metric of bit flow tends to reduce gradually. In
respect of the same length of the bit flow , right priority random metric is universally the
highest, and the left priority one is universally the lowest with others between the two.
Key Words: Random Metric；Bit Flow；Identification Field；IP Message