公开(公告)号：US20170338909A1

公开(公告)日：2017-11-23

申请号：US15521930

申请日：2015-10-21

Applicant: KOWA COMPANY, LTD.

Inventor： Tomohisa AZEGAMI ,  Tatsuya KIMBARA ,  Masatomo OHMAKI

IPC: H04L1/08 ,  H04B17/309

CPC classification number: H04L1/08 ,  H04B17/309 ,  H04L1/00 ,  H04L1/0006

Abstract: [Problem] To prevent either of two packet data having the same content from being affected by noise[Solution] A packet data transmission device (not shown) transmits first packet data 1A, . . . and second packet data 1B, . . . having the same content intermittently with an idle time I therebetween. When the length of the first and second packet data 1A, . . . , 1B, . . . is denoted by LP, the length of the idle time I is denoted by LI, the duration of low-frequency noise N is denoted by LN, the time with no low-frequency noise from the occurrence of one low-frequency noise N to the occurrence of the next low-frequency noise N is denoted by LC, the following expressions (1), (2) are satisfied. Consequently, either the first packet data or the second packet data is transmitted to a receiver without being affected by noise. LI>LN  (1) 2×LP+LI