US 6,982,983 B2
Communications network system using gateway
Katsumi Ota, Kanagawa (Japan); Ricardo Wong, Kanagawa (Japan); and Takeshi Akatsuka, Yokohama (Japan)
Assigned to Nissan Motor Co., Ltd., Kanagawa (Japan)
Filed on Apr. 16, 2001, as Appl. No. 9/834,644.
Claims priority of application No. 2000-138197 (JP), filed on May 11, 2000.
Prior Publication US 2001/0042137 A1, Nov. 15, 2001
Int. Cl. H04L 12/56 (2006.01)
U.S. Cl. 370—401 16 Claims
OG exemplary drawing
 
1. A communications network system, comprising:
a communications line;
a data transmission unit that transmits a data having a specific ID code at a predetermined communications period to the communications line;
a data reception unit that receives the data transmitted from the data transmission unit on the communications line;
a determining unit that determines whether a communications period of the transmitted data on the communications line having the ID code which is equal to the specific ID code which is set as a communications acceptance ID code is coincident with the predetermined communications period; and
a communications acceptance unit that accepts a communication of the data from the data transmission unit to the data reception unit only if the data provides the ID code which is equal to the specific ID code and provides the communications period which is coincident with the predetermined communications period determined by the determining unit.