Mobile terminal, communication system, and method for changing location registration
First Claim
Patent Images
1. A mobile terminal comprising:
- a communication unit operable to communicate over a first mobile communication network and a second mobile communication network; and
a control unit coupled with said communication unit, said control unit operable, when said mobile terminal is registered to said second mobile communication network, to monitor for said, mobile terminal to be engaged in a voice communication over said second mobile communication network;
wherein said control unit is further operable to monitor for a change in location of said mobile terminal;
said control unit is further operable to receive from said second mobile communication network, through said communication unit, a registration possibility indication of whether it is possible to register with said first mobile communication network; and
said control unit is further operable, responsive to a change in location of said mobile terminal, to attempt to register to said first mobile communication network after confirmation by said control unit that said voice communication is not presently in progress, and confirmation by said control unit that said registration possibility indication indicates that it is possible to register to said first mobile communication network.
1 Assignment
0 Petitions
Accused Products
Abstract
A mobile terminal, which is registered to either a first mobile communication network or a second communication network, determines whether it is possible to register to the first mobile communication network on the basis of control information received from the second mobile communication network. Then, the mobile terminal attempts to register to the first mobile communication network a predetermined number of times in a case that it is determined that it is possible to register to the first mobile communication network.
14 Citations
23 Claims
-
1. A mobile terminal comprising:
-
a communication unit operable to communicate over a first mobile communication network and a second mobile communication network; and a control unit coupled with said communication unit, said control unit operable, when said mobile terminal is registered to said second mobile communication network, to monitor for said, mobile terminal to be engaged in a voice communication over said second mobile communication network; wherein said control unit is further operable to monitor for a change in location of said mobile terminal; said control unit is further operable to receive from said second mobile communication network, through said communication unit, a registration possibility indication of whether it is possible to register with said first mobile communication network; and said control unit is further operable, responsive to a change in location of said mobile terminal, to attempt to register to said first mobile communication network after confirmation by said control unit that said voice communication is not presently in progress, and confirmation by said control unit that said registration possibility indication indicates that it is possible to register to said first mobile communication network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 20, 21, 22)
-
-
10. A communication system comprising:
-
a first mobile communication network that includes a first location management device, wherein said first location management device is operable to manage location information of mobile terminals registered to said first mobile communication network; a second mobile communication network that includes a second location management device and a base station, said second location management device operable to manage location information of mobile terminals registered to said second mobile communication network, said base station is positioned within said first mobile communication network, wherein said base station is operable to transmit for receipt by a mobile terminal notification information indicating that it is possible to register to said first mobile communication network, wherein an interval of time between transmission of said registration possibility information by said base station is adjustable in accordance with a distance of said base station from a center of said first mobile communication network; and a management device coupled with said first mobile communication network and said second mobile communication network, said management device operable to store data correlated with a mobile terminal identifier for each of said mobile terminals, said management device operable to selectively update said data in response to receipt, from each of said mobile terminals, of a notification of a current registration of a respective mobile terminal to at least one of said first mobile communication network or said second mobile communication network.
-
-
11. A location registration changing method comprising:
-
providing a mobile terminal operable to communicate over a first mobile communication network and a second mobile communication network; registering said mobile terminal to said second mobile communication network; monitoring with said mobile terminal for said mobile terminal to be engaged in a voice communication over said second mobile communication network; monitoring with said mobile terminal for said mobile terminal to change location; receiving registration possibility information from said second mobile communication network with said mobile terminal that indicates whether it is possible to register to said first mobile communication network; said mobile terminal, in response to a change in location of said mobile terminal, transmitting to said first mobile communication network, a notification, including an identifier, only when said mobile terminal confirms voice communication is not presently in progress, and that said registration possibility information indicates that it is possible to register to said first mobile communication network; and attempting to register said mobile terminal to said first mobile communication network. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 23)
-
Specification