Mobile communication systems
DC CAFCFirst Claim
1. A method of operating a mobile communication device within a geographical area having overlapping coverage from first and second mobile telephone networks, where said first network is the home network of the mobile communication device and said first and second networks provide respective first and second sets of services in said geographical area, the method comprising registering the device with said first network when a service of said first set is requested and registering the device with said second network when a service of said second set, but not of said first set, is requested.
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Litigations
1 Petition
Accused Products
Abstract
A method of operating a mobile telephone within a geographical area having overlapping coverage from a first, GSM, network and a second, UMTS, network, where said GSM network is the home network (HPLMN) of the mobile communication device and said GSM and UMTS networks provide respective first and second sets of services in said geographical area. The method comprises registering the telephone with the GSM network when a service of said first set is requested and registering the device with the UMTS network when a service of said second set, but not of said first set, is requested. The method provides the mobile telephone with a roaming for service function.
117 Citations
14 Claims
- 1. A method of operating a mobile communication device within a geographical area having overlapping coverage from first and second mobile telephone networks, where said first network is the home network of the mobile communication device and said first and second networks provide respective first and second sets of services in said geographical area, the method comprising registering the device with said first network when a service of said first set is requested and registering the device with said second network when a service of said second set, but not of said first set, is requested.
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10. A mobile telecommunication system comprising at least first and second mobile telephone networks having an overlapping geographical area of coverage and a multiplicity of mobile communication devices, whereni said first network is the home network of the mobile communication devices and said first and second networks are arranged to provide respective first and second sets of telephonic services in said geographical area, the system comprising:
- control means for registering a communication device with said first network when a service of said first set is requested and for registering the device with said second network when a service of said second set, but not of said first set, is requested, wherein the control means comprises means for determining if the desired service belongs to said first set, in response to a request for service received from said mobile communications device.
- View Dependent Claims (11, 12)
- 13. A mobile telecommunication system comprising at least first and second mobile telephone networks having an overlapping geographical area of coverage and a multiplicity of mobile communication devices, wherein said first network is the home network of the mobile communication devices and said first and second networks are arranged to provide respective first and second sets of telephonic services in said geographical area, the system comprising control means for registering a communication device with said first network when a service of said first set is requested and for registering the device with said second network when a service of said second set, but not of said first set, is requested, wherein the control means comprises means associated with each of the mobile communication devices for transmitting a deregistration request to the first network and for transmitting a registration request to the second network when a service of said second set, but not of said first set, is requested.
Specification