Mobile communication system and base station control apparatus
First Claim
1. A mobile communication system that uses a terrestrial cellular mobile communication system and a satellite mobile communication system, the mobile communication system comprising:
- terrestrial cellular base stations that perform a radio communication with a mobile station apparatus;
a satellite base station that performs a radio communication with a mobile station apparatus via a communication relay apparatus of an artificial satellite; and
a base station control apparatus of controlling the terrestrial cellular base stations and the satellite base station,wherein a same frequency band is used for radio communications between the mobile station apparatus and each of the terrestrial cellular base stations and the communication relay apparatus of the artificial satellite in a common area where the terrestrial cellular mobile communication system and the satellite mobile communication system are available, andwherein the base station control apparatus controls to allocate a first set of time slots used in the terrestrial cellular base stations and a second set of time slots used in the satellite base station in the common area so that none of the first set of time slots overlap with any of the second set of time slots and to increase an allocation rate of the second set of time slots allocated for the satellite base station in a predetermined radio communication frame of the same frequency band in an emergent condition in which a failure occurs in a part of the terrestrial cellular base stations so as to be more than that in a normal condition, in a state that the terrestrial cellular base stations and the satellite base station in the common area are synchronized in time with each other.
3 Assignments
0 Petitions
Accused Products
Abstract
Mobile communication systems and base station control apparatuses are provided, by which a spectral efficiency can be improved while preventing interference between a terrestrial cellular mobile communication system and a satellite mobile communication system, and mobile communication services using mobile station apparatuses can be provided more surely in an emergent condition in which a failure occurs in a part of terrestrial cellular base stations. A same frequency band is used for radio communications between a mobile station apparatus 10 and each of terrestrial cellular base stations 20 and a communication relay apparatus 41 of artificial satellite 40. A radio resource used in the terrestrial cellular base stations 20 and a radio resource used in a satellite base station 30 in a common area where the terrestrial cellular mobile communication system and the satellite mobile communication system are available are allocated so as not to overlap with each other, and the radio resource allocated for the satellite base station is increased in the emergent condition in which a failure occurs in a part of the terrestrial cellular base stations so as to be more than that in a normal condition.
11 Citations
20 Claims
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1. A mobile communication system that uses a terrestrial cellular mobile communication system and a satellite mobile communication system, the mobile communication system comprising:
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terrestrial cellular base stations that perform a radio communication with a mobile station apparatus; a satellite base station that performs a radio communication with a mobile station apparatus via a communication relay apparatus of an artificial satellite; and a base station control apparatus of controlling the terrestrial cellular base stations and the satellite base station, wherein a same frequency band is used for radio communications between the mobile station apparatus and each of the terrestrial cellular base stations and the communication relay apparatus of the artificial satellite in a common area where the terrestrial cellular mobile communication system and the satellite mobile communication system are available, and wherein the base station control apparatus controls to allocate a first set of time slots used in the terrestrial cellular base stations and a second set of time slots used in the satellite base station in the common area so that none of the first set of time slots overlap with any of the second set of time slots and to increase an allocation rate of the second set of time slots allocated for the satellite base station in a predetermined radio communication frame of the same frequency band in an emergent condition in which a failure occurs in a part of the terrestrial cellular base stations so as to be more than that in a normal condition, in a state that the terrestrial cellular base stations and the satellite base station in the common area are synchronized in time with each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A base station control apparatus that controls terrestrial cellular base stations that perform a radio communication with a mobile station apparatus and a satellite base station that performs a radio communication with a mobile station apparatus via a communication relay apparatus of an artificial satellite in a mobile communication system that uses a terrestrial cellular mobile communication system and a satellite mobile communication system,
wherein a same frequency band is used for radio communications between the mobile station apparatus and each of the terrestrial cellular base stations and the communication relay apparatus of the artificial satellite in a common area where the terrestrial cellular mobile communication system and the satellite mobile communication system are available, and wherein the base station control apparatus controls to allocate a first set of time slots used in the terrestrial cellular base stations and a second set of time slots used in the satellite base station in the common area so that none of the first set of time slots overlap with any of the second set of time slots and to increase an allocation rate of the second set of time slots allocated for the satellite base station in a predetermined radio communication frame of the same frequency band in an emergent condition in which a failure occurs in a part of the terrestrial cellular base stations so as to be more than that in a normal condition, in a state that the terrestrial cellular base stations and the satellite base station in the common area are synchronized in time with each other.
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14. For a mobile communication system including a mobile base station apparatus, terrestrial cellular base stations that perform a radio communication with the mobile station apparatus, and a satellite base station that performs a radio communication with the mobile base station apparatus via a communication relay apparatus of an artificial satellite, a method comprising:
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communicating between the mobile station apparatus and each of the terrestrial cellular base stations using a first frequency band; communicating between the mobile station apparatus and the communication relay apparatus of the artificial satellite using the first frequency band; for a common area where the terrestrial cellular mobile communication system and the satellite mobile communication system are available, allocating a first set of time slots used in the terrestrial cellular base stations and a second set of time slots used in the satellite base station so that none of the first set of time slots overlap with the second set of time slots; and in a state that the terrestrial cellular base stations and the satellite base station in the common area are synchronized in time with each other, increasing an allocation rate of the second set of time slots in a predetermined radio communication frame of the same frequency band in an emergent condition in which a failure occurs in a part of the terrestrial cellular base stations so as to be more than that in a normal condition. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification