Title:
DATA TRANSMISSION METHOD AND DEVICE
Document Type and Number:
Japanese Patent JP3112346
Kind Code:
B2
Abstract:
PURPOSE: To provide a communication protocol used by a main station and plural mobile sub-stations by using a time slot for transmitting a data packet.
CONSTITUTION: A sub-station, provided with a message to be transmitted to a main station, first transmits an access request data packet to the main station. In the case that the sub-station recognizes its own position similarly to the main station, thesub-station impresses the progress of time to the access request data packet, and thus becomes longer and is provided with more information such as a recognition code selected by itself and/or the information related to the length of the message to be transmitted. The main station measures the point of time of receiving the access request data packet related to time slot distribution and transmits the correction of the progress of the time to the sub-station. After a transmission permission has been recognized, the data packet is transmitted in a length essentially corresponding to the one of the time slot, so as to transmit more information per data packet.
Inventors:
Franchdel hunt
Alfred Leonard Maria Welling
Alfred Leonard Maria Welling
Application Number:
JP17998292A
Publication Date:
November 27, 2000
Filing Date:
July 07, 1992
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
H04B7/26; H04J3/00; H04W56/00; (IPC1-7): H04Q7/38; H04B7/26; H04J3/00; H04L12/28
Domestic Patent References:
| JP472827A |
Other References:
【文献】欧州特許出願公開295227(EP,A1)
【文献】欧州特許出願公開321454(EP,A2)
【文献】欧州特許出願公開321454(EP,A2)
Attorney, Agent or Firm:
Tadahiko Ito (1 outside)
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