The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 17, 1997
Filed:
Jan. 04, 1996
Francis Pinault, Bois Colombes, FR;
Christophe Jouin, Paris, FR;
Alcatel Mobile Phones, Paris, FR;
Abstract
Periodically, when a mobile is in its normal mode of operation, a first list of control frequencies transmitted by respective base stations of the geographical area in which the mobile is located is stored in a SIM card and a second list of control frequencies and associated respective maximal second receive levels measured by the mobile is stored in RAM. In response to being switched on, the mobile measures a first receive level for each of the control frequencies defined in the network and a comparator compares the first and second receive levels for each of the control frequencies of the second list, to assess movement of the mobile. To synchronize to a given network constituting a subnetwork of the radio communication network, the mobile uses the control frequencies defined in the radio communication network or the control frequencies from the first list, respectively, according to whether the mobile has moved or not.