Source: http://www.google.nl/patents/US5634193
Timestamp: 2018-01-24 07:45:42
Document Index: 51450544

Matched Legal Cases: ['art 1992', 'art 1979', 'art 1991', 'art 2003', 'art 2004', 'art 2009', 'art 2011', 'art 2011']

Patent US5634193 - Method of locating a mobile station in a mobile telephone system having ... - Google Patenten
A mobile telephone system has in a cell a base station and sub-stations which are connected to a mobile switching center. The mobile telephone system has control channels and frequencies which are time divided to traffic channels. Some of the frequencies are selected as identification frequencies. Each...http://www.google.nl/patents/US5634193?utm_source=gb-gplus-sharePatent US5634193 - Method of locating a mobile station in a mobile telephone system having indoor and outdoor base stations
Publicatienummer US5634193 A
Aanvraagnummer US 08/638,201
Publicatiedatum 27 mei 1997
Aanvraagdatum 26 april 1996
Prioriteitsdatum 24 maart 1992
Ook gepubliceerd als CA2109116A1, CA2109116C, DE69318359D1, DE69318359T2, EP0586682A1, EP0586682B1, WO1993019538A1
Publicatienummer 08638201, 638201, US 5634193 A, US 5634193A, US-A-5634193, US5634193 A, US5634193A
Uitvinders Walter Ghisler
Oorspronkelijke patenteigenaar Telefonaktiebolaget Lm Ericsson
Patentcitaties (10), Verwijzingen naar dit patent (166), Classificaties (9), Juridische gebeurtenissen (4)
Method of locating a mobile station in a mobile telephone system having indoor and outdoor base stations
US 5634193 A
1. A method for handing off a mobile station from an outdoor base station to an indoor base station in a mobile telephone system with a plurality of cells intended for indoor and outdoor use, and comprising an external part-system for outdoor use which includes external base stations connected to a mobile switching center, and an internal part-system for indoor use and having internal base stations connected to the mobile switching center, said mobile telephone system being allocated a plurality of frequencies for radio channels, said method comprising the steps of:
specifying a predetermined number of said allocated frequencies as identification frequencies for said indoor base stations;
selecting unique frequency sets from among said identification frequencies, each set comprising at least two frequencies;
assigning one of the unique frequency sets to each indoor base station each of said indoor base stations being assigned different frequency sets, wherein said indoor base stations transmit on their respective unique frequency set;
measuring in said mobile station the signal strengths of said identification frequencies;
reporting a number of said identification frequencies having a signal strength above a first threshold to the mobile switching center;
comparing the reported frequencies with said unique frequency sets;
selecting an indoor base station when an agreement is found between at least a subset of the reported frequencies and at least a subset of the indoor base stations unique frequency set;
assigning said selected indoor base station a traffic channel from among the frequencies including said identification frequencies; and
handing off said mobile station to said selected indoor base station, wherein said mobile station communicates with said indoor base station on said assigned traffic channel.
2. A method according to claim 1, wherein the mobile station in addition reports signal strengths of the strongest frequency signals and the mobile switching center compares at least one of the signal strengths with a second threshold value, wherein said second threshold value is greater than said first threshold value.
the mobile station listens to the signal strengths of the identification frequencies for the duration of the connection with the selected indoor base station;
the mobile station reports a number of the identification frequencies having a signal strength above the first threshold to the mobile switching center;
the designations of the reported frequencies are compared with the unique frequency set for the selected indoor base station; and
in the event of a deviation between the subset of the unique frequency and the subset of the reported frequencies, the connection is handed off from the selected indoor base station to one of the outdoor base stations that lacks a unique frequency set.
US4144411 * 22 sept 1976 13 maart 1979 Bell Telephone Laboratories, Incorporated Cellular radiotelephone system structured for flexible use of different cell sizes
US4955082 * 11 jan 1989 4 sept 1990 The Tokyo Electric Power Company Ltd. Mobile communication system
US5128959 * 22 feb 1991 7 juli 1992 Motorola, Inc. Variable bandwidth CDMA radio system
US5235632 * 4 april 1991 10 aug 1993 Telefonaktiebolaget L M Ericsson Mobile telephony system intended for indoor and outdoor subscriber use
EP0225607A2 * 4 dec 1986 16 juni 1987 Hitachi, Ltd. Portable radio telephone system
EP0388034A2 * 23 feb 1990 19 sept 1990 Libera Telecom Limited Telephone systems
EP0452290A1 * 14 maart 1991 16 okt 1991 Telefonaktiebolaget L M Ericsson A mobile telephone system intended for indoor and outdoor subscriber use
WO1986006915A1 * 6 mei 1986 20 nov 1986 Telefonaktiebolaget L M Ericsson Installation with portable, wireless telephone sets
US5940748 * 21 feb 1997 17 aug 1999 Matsushita Communications Industrial Corporation Method and system for determining the integrity of a received signal
US6052558 * 28 april 1997 18 april 2000 Motorola, Inc. Networked repeater
US6078812 * 15 dec 1997 20 juni 2000 Ericsson Inc. System and method for adaptive channel allocation
US6249679 * 21 juli 1998 19 juni 2001 U.S. Philips Corporation Telecommunications system, location method and mobile station for such a system
US6535730 13 dec 1999 18 maart 2003 At&T Corp. Wireless centrex conference call adding a party
US6574470 13 dec 1999 3 juni 2003 At&T Corp. Programmable ring-call forwarding in a wireless centrex services system
US6587683 13 dec 1999 1 juli 2003 At&T Corp. Unconditional call forwarding in a wireless centrex services system
US6591115 13 dec 1999 8 juli 2003 At&T Corp. Wireless centrex call hold
US6618600 13 dec 1999 9 sept 2003 At&T Corp. Distinctive ringing in a wireless centrex system
US6631258 13 dec 1999 7 okt 2003 At&T Corp. Busy call forwarding in a wireless centrex services system
US6711401 13 dec 1999 23 maart 2004 At&T Corp. Wireless centrex call return
US6738615 13 dec 1999 18 mei 2004 At&T Corp. Wireless centrex caller ID
US6745025 13 dec 1999 1 juni 2004 At&T Corp. Time-of-day call forwarding in a wireless centrex services system
US7236473 * 11 jan 2002 26 juni 2007 Ncr Corporation Methods and apparatus for automatic assignment of a communication base station and timeslot for an electronic shelf label
US7386308 5 jan 2005 10 juni 2008 Ernest Mann In-building radio frequency communications system with automatic failover recovery
US7512109 * 30 sept 2002 31 maart 2009 Intel Corporation Slot structure for radio communications system
US7526248 * 6 juni 2006 28 april 2009 Nextwave Broadband, Inc. Extended wireless communication system and method
US7567803 28 sept 2001 28 juli 2009 Siemens Aktiengesellschaft System and method for inhibiting features for wireless terminals
US7890099 * 2 april 2002 15 feb 2011 Kineto Wireless, Inc. Method for automatic and seamless call transfers between a licensed wireless system and an unlicensed wireless system
US8233460 23 juli 2007 31 juli 2012 Gpne Corp. Communication system with map of information provided from controller to enable communication with nodes
US8311020 23 maart 2011 13 nov 2012 GPNE Corporation Communication system allowing network nodes to efficiently establish communications with a controller
US8335195 13 juli 2011 18 dec 2012 GPNE Corporation Communication system allowing node identification
US8493205 * 29 jan 2010 23 juli 2013 Ntt Docomo, Inc. Search area reduction based on indoor detection for estimating the location of a wireless terminal
US20030073427 * 28 sept 2001 17 april 2003 Bertram Geck System and method for inhibiting features for wireless terminals
US20030133468 * 11 jan 2002 17 juli 2003 Ncr Corporation Methods and apparatus for automatic assignment of a communication base station and timeslot for an electronic shelf label
US20030156594 * 30 sept 2002 21 aug 2003 Trott Mitchell D. Slot structure for radio communications system
US20060148468 * 5 jan 2005 6 juli 2006 Ernest Mann In-building radio frequency communications system with automatic failover recovery
US20070281608 * 6 juni 2006 6 dec 2007 Nextwave Broadband Inc. Extended wireless communication system and method
US20080014953 * 23 juli 2007 17 jan 2008 Gpne Corp. Communication system with a request by a single node made over one of two separate slots in a frame
US20080108367 * 8 nov 2006 8 mei 2008 Nextel Communications, Inc. System and method for supporting multiple technologies in a wireless communication cell
US20080200122 * 1 mei 2008 21 aug 2008 Ernest Mann In-building radio frequency communications system with automatic failover recovery
US20110026499 * 13 okt 2010 3 feb 2011 Gpne Corp. Communication system with a mapping system allowing nodes to register with a controller
US20110170677 * 23 maart 2011 14 juli 2011 Gpne Corp. Communication system allowing network nodes to efficiently establish communications with a controller
US20110187525 * 29 jan 2010 4 aug 2011 Polaris Wireless, Inc. Search Area Reduction For Estimating the Location of a Wireless Terminal Based On Indoor Detection
Classificatie in de VS 455/440
Internationale classificatie H04W36/36, H04W48/08, H04W36/04
Coöperatieve classificatie H04W36/36, H04W36/04, H04W48/08
Europese classificatie H04W48/08, H04W36/04