Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
1998-04-09
2001-03-13
Tsang, Fan (Department: 2746)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S435100, C455S428000, C455S552100
Reexamination Certificate
active
06201963
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a mobile communication system that allows a land mobile station to communicate using a roaming service through a different communication system of each of communication companies in an area into which the land mobile station enters, in particular, to a mobile communication system that allows the land mobile station to adaptively use user interfaces of individual communication companies.
2. Description of the Related Art
In a conventional mobile communication system, particularly, in a radiotelephone system of which a land mobile station communicates through a repeater station, there are many communication systems provided by communication companies. Normally, a land mobile station issues a position registration request to a repeater station of a communication system of a communication company to which the land mobile station subscribes. Hereinafter, a communication company to which a land mobile station subscriber is referred to as subscriber communication company. The communication system of the subscriber communication company is referred to as subscriber communication system. The other communication companies are referred to as non-subscriber communication companies. The communication system of a non-subscriber communication company is referred to as non-subscriber communication system. When the mobile station exits from the service area of the communication system of the subscriber communication company and enters into a service area of a communication system of a non-subscriber communication company, the mobile station issues a position registration request to a repeater station of the communication system of the non-subscriber communication company. Thus, the land mobile station can communicate using the communication system of the non-subscriber communication company. The service that a land mobile station communicate using a communication system of a non-subscriber communication company is referred to as roaming service. At this point, the user of the land mobile station can identify a service area of a communication company of a non-subscriber communication company with system information that the land mobile station receives.
Thus, in a mobile communication system having the roaming service, even if a land mobile station enters into a service area of a communication system of a non-subscriber communication company, the land mobile station can communicate using the communication system of the non-subscriber communication company. However, if communication systems of individual communication companies have unique user interfaces, the mobile station cannot flexibly handle these user interfaces. Thus, in the situation that a land mobile station can use a service of a communication system of a non-subscriber communication company using the roaming service, the land mobile station cannot effectively use the service of the communication system. For example, in the case that a mobile station that subscribes to a communication system of a domestic communication company (for example, in Japan) is used in a foreign country, even if the land mobile station can cause a communication system of a non-subscriber communication company in the foreign country, when the user interface of the land mobile station cannot handle the foreign language (namely, the land mobile station cannot display messages and time in the foreign language), the user of the land mobile station cannot effectively use the roaming service of the communication system of the foreign country. The interface information of the present invention includes information such as country code and geographic information such as Long. 35° E. and Lat. 35° N. and information of communication systems such as W-CDMA and TD-CDMA.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a mobile communication system that allows a mobile station to effectively have a roaming service in a service area of a communication system of a non-subscriber communication company that has a different user interface from that of a communication system of a subscriber communication company.
The present invention is a mobile communication system for allowing a mobile station to use communication systems of non-subscriber communication companies in their service areas into which the mobile station enters using roaming services, wherein the mobile station recognizes user interface information of a communication system of a non-subscriber communication company in its service area into which the mobile station enters and switches a user interface of a communication system of a subscriber communication company to a user interface corresponding to the communication system of the non-subscriber communication company.
The mobile station comprises a storing means for storing data of a plurality of user interfaces, a recognizing means for recognizing user interface information included in system information received from a repeater station of the non-subscriber communication company, and a switching means for reading data of the relevant user interface from the storing means corresponding to the recognized user interface information and setting the data of the user interface to an interface portion of the mobile station.
The mobile communication system further comprises a comparing means for comparing the difference between system information of the communication system of the non-subscriber communication company and system information of the communication system of the subscriber communication system, a position registration requesting means for issuing a position registration request to the communication system of the non-subscriber communication system when the system information of the communication system of the non-subscriber communication system is different from the system information of the communication system of the subscriber communication system, and a determining means for determining whether or not the communication system of the non-subscriber communication company has accepted the position registration request, wherein the recognizing means recognizes the user interface information when the communication system of the non-subscriber communication company has accepted the position registration request.
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Milord Marceau
NEC Corporation
Scully Scott Murphy & Presser
Tsang Fan
LandOfFree
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