| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To realize high confidentiality to an external eavesdropper while efficient transmission of network coding is realized by performing a coding operation on an input signal to obtain an output signal and effectively changing a frequency of the output signal in accordance with a prescribed rule in a relay node. <P>SOLUTION: In each relay node, a frequency change pattern in which a use frequency is set at every time is stored as a pattern-time table, and a link-pattern corresponding table where the frequency change pattern to be used is set at every link is stored. When the input signal originated from an origination source node is inputted, the coding operation for multiplying a coding matrix is performed and the output signal is obtained (ST31). The use frequency of the output signal is obtained by referring to the link-pattern corresponding table and the pattern-time table (ST33, 34), and the use frequency is changed in accordance with an output link and the present time. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
