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Patent Searching and Data


Title:
PUBLIC TYPE DEVICE FOR INDICATING LOCAL INFORMATION
Document Type and Number:
Japanese Patent JPH0729100
Kind Code:
A
Abstract:

PURPOSE: To execute the radio transmission of a picture and voice information in a wide range through the use of feeble radio wave.

CONSTITUTION: The picture of a parking lot photographed by a television camera CAM is transmitted to a repeater station TR-1 installed at a street lamp on a parking lot guiding road through the use of an optical transmitter OTR installed, in a base station. The base station TR-1 retransmits the picture received by an optical receiver OR-1 into a cover range AR-1 by using a feeble radio wave transmitter WTR-1 through the use of the radio wave of ordinary TV band and also re-transmits it to other adjacent repeater stations TR-2 to TR-4 through the use of the optical transmitter OT-1. Then, concerning the repeater stations TR-2 to TR-4, picture information is received from the adjacent repeater station by the optical receiver, it is re-transmitted through the use of the feeble radio wave transmitter and, at the same time, it is re- transmitted to other adjacent repeater stations through the use of the optical transmitter. The picture transmitted by the feeble radio wave transmitter is received by a television PTV which is mounted on the vehicle running on the parking lot guiding road.


Inventors:
FUKUMOTO MASAAKI
YAMATO JUNJI
Application Number:
JP17284293A
Publication Date:
January 31, 1995
Filing Date:
July 13, 1993
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
G08G1/14; H04B7/26; H04B10/11; H04B10/112; H04W4/04; (IPC1-7): G08G1/14; H04B7/26; H04B10/10; H04B10/105; H04B10/22
Attorney, Agent or Firm:
Wakabayashi Tadashi