Multiplex communications – Wide area network – Packet switching
Patent
1994-09-28
1995-12-26
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
34082508, H04L 12403
Patent
active
054794064
ABSTRACT:
A data communication system is constituted by a master station and slave stations for communicating data with the master station. The slave station includes a memory and a response control section. The memory stores flag data indicating whether the contents of a plurality of data managed by the home station have changed. The response control section transmits the data flag stored in the memory as response data when a command flag included in command data from the master station designates transmission of the data flag, and transmits the designated data as response data when a command flag included in command data from the master station designates transmission of the data managed by the home station. The master station includes a command control section for transmitting command data including a command flag for designating transmission of a data flag at first, and retransmitting command data including a command flag for designating transmission of the data managed by the slave station to the slave station which has transmitted response data including a data flag indicating a change in the data only when the data flag included in the response data from the slave station in response to the command data indicates that the data managed by the slave station have changed. A data communication method is also disclosed.
REFERENCES:
patent: 5161151 (1992-11-01), Kimura et al.
patent: 5272702 (1993-12-01), Snowbarger et al.
NEC Corporation
Safourek Benedict V.
Ton Dang
LandOfFree
Data communication system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Data communication system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data communication system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1374320