Title:
POSITION DETERMINING SYSTEM FOR EMERGENCY RADIO COMMUNICATION
Document Type and Number:
Japanese Patent JP3103046
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a technique for determining the ballpark position of a mobile wireless unit.
SOLUTION: This system shares a computer 9 and a database 10 which is especially defined between plural switching station 5 for servicing many base stations 4 for mobile wireless unit, and the base station 4 services many antennas and transmitting/receiving sites in a cellular area previously defined. A measurement result of signal intensity in the base station 4 is transmitted to the shared computer 9 via the switching station 5. The computer 9 calculates a practical small area for search using that measurement result if the user of the mobile wireless unit needing a support is helpless to determine its own position. Thus calculated area and database supply thus calculated detailed mapping to an emergency support center for processing information. In the mapping, specified features topography, building, signal, etc., used in a query to narrow down the communicator's position into a small part are emphasized.
Inventors:
James M Dunn
Edith Helen Stern
Edith Helen Stern
Application Number:
JP21370297A
Publication Date:
October 23, 2000
Filing Date:
August 07, 1997
Export Citation:
Assignee:
International Business Machines Corporation
International Classes:
B60R25/10; G01S19/09; G01S19/46; G08B25/01; H04M11/04; H04W64/00; G01S5/00; G01S5/14; (IPC1-7): H04Q7/34; H04Q7/38
Domestic Patent References:
| JP4360328A | ||||
| JP53105902A | ||||
| JP685736A |
Attorney, Agent or Firm:
Hiroshi Sakaguchi (1 person outside)
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