Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1998-08-24
2001-01-09
Bost, Dwayne D. (Department: 2744)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S434000, C455S414200, C455S550100
Reexamination Certificate
active
06173179
ABSTRACT:
The invention relates to a radio transmission system forming a telecommunications network to which at least one telecommunications mobile is connected for a called subscriber to move about in coverage areas belonging to said telecommunications network and in areas belonging to other networks, the mobile comprising:
storage means for storing network names and quality indices assigned to each of said networks.
The invention also relates to a method of establishing a list of networks and also a mobile in which the method is implemented.
The possibility of being connected to another network than the one to which one has made a subscription is known in GSM terms by the name of roaming. On this item one may notably be referred to the title: “The GSM System for Mobile Communication” by Michel MOULY and Marie-Bernadette PAUTET published by the authors whose address is 4 rue Elys{acute over (e)}e Reclus—F-91120 FRANCE.
A system of this type is described in the patent application filed in France on Oct. 16, 1996 under no. 96 12629 in the name of Philips Electronics N.V. published under no. 2754658. In this system the quality index assigned to each of the networks is the time during which the mobile could be connected to the respective network.
The problem which is then posed is to choose the network to which one wishes to be connected. The user may be called upon for help to choose his network bearing in mind the quality index. In the patent application in question there was suggested to establish a list of these networks to which one could be connected. However, a problem remains, that is, the updating of said list.
The present invention proposes a system of the type defined in the opening paragraph which provides for the user a list which is updated as he wishes.
Therefore, such a system is characterized in that there are provided:
means for automatically updating said list while taking the quality indices into account.
An important characteristic feature of the invention according to which the quality index is the time duration for which the mobile could be connected to said network to which this index is assigned provides great reliability for a suitable choice of the network to which the subscriber can be connected. This choice, based on this time duration is a better quality than a choice based on the received level as is customarily the case.
Thus, thanks to the invention for enabling the user to choose a network with which he can work, the user has a list which can automatically be updated and has good choice criterions.
REFERENCES:
patent: 5590397 (1996-12-01), Kojima
patent: 5613204 (1997-03-01), Haberman et al.
patent: 5613213 (1997-03-01), Naddell et al.
patent: 0781064A2 (1997-06-01), None
patent: 2754658 (1996-10-01), None
“The GSM System for Mobile Communication”, By Michel Mouly and Marie-Bernadette Pautet, Published by the Authors, 1992.
Bost Dwayne D.
Davis Temica M.
Halajian Dicran
U.S. Philips Corporation
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