Position display system of mobile terminal

• US 6,347,230 B2
• Filed: 06/21/2001
• Issued: 02/12/2002
• Est. Priority Date: 07/25/1995
• Status: Expired due to Fees

• Current Assignee: Ace K Computer Company Limited
• Original Assignee: Ace K Computer Company Limited
• Inventors: Kurokawa, Hiroyuki, Koshima, Hiroaki, Iwagami, Ryuichi, Kumamoto, Katsuhiko, Muya, Kimio
• Primary Examiner(s): LE, THANH C
• Application Number:
  US09/885,024
• Publication Number:
  US 20010034240A1
• Time in Patent Office: 236 Days
• Field of Search: 455/422, 455/426, 455/450, 455/458, 455/62, 455/67.1, 455/456, 455/457, 455/575, 342/450, 342/451, 342/457, 342/458
• US Class Current: 455/457
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 16/26 Cell enhancers or enhancement, e.g. for tunnels, building shadow
• CPC Class Codes: H04W 4/029 Location-based management or tracking services
• CPC Class Codes: H04W 4/33 for indoor environments, e.g. buildings
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 60/04 using triggered events
• CPC Class Codes: H04W 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 76/50 for emergency connections
• CPC Class Codes: H04W 8/02 Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
• CPC Class Codes: H04W 8/08 Mobility data transfer
• CPC Class Codes: H04W 88/18 Service support devices; Network management devices

Abstract

A position detection system of a mobile terminal includes a small zone communication system (50) such as the PHS system, and a center station (1) connected to an exchange station (2) forming the PHS system. When a call is dispatched from the center station to the telephone number of a mobile station 7 of which the position is to be identified, the call signal is transmitted to a repeater (6) located closest to the mobile station (7) via exchange stations (2, 4) and main lines (3, 5) forming the PHS system (50). Since the mobile station (7) can identify the identification number of the closest repeater (6), the position of repeater (6) can be identified by referring to the database of the PHS system (50) using the repeater database provided in a center control station (51). The position can be displayed on a CRT screen at the center station (1) side. A position detection apparatus of a mobile terminal that can detect a position at low cost and at high accuracy is provided.

Claims

1. A position determining system comprising:

means for obtaining a wave maximum propagation distance centering about a wave generation source for each level of electric field intensity for generating a first wave propagation pattern according thereto,

means for detecting an arrangement and profile of a building around said wave generation source according to a three-dimensional electronic map,

means for obtaining a crossing point of said first wave propagation pattern and said profile of a building, and

means for automatically generating a second wave propagation pattern taking into consideration said profile of a building from said crossing point of said first wave propagation pattern and said profile of a building.

2. The position determining system according to claim 1, wherein a plurality of said wave generation sources are provided further comprising:

means for forming a plurality of second wave propagation patterns from said first wave propagation pattern and said profile of a building, and

means for detecting an overlapping portion of said plurality of second wave propagation patterns.