Mobile communication system and base station apparatus therefor
First Claim
1. A mobile communication system, which comprises a plurality of mobile communication networks which independently operate in service areas formed in a predetermined region to include a common portion, and in which said plurality of mobile communication networks exchange control signals between a base station and mobile stations using specific slots at different specific frequencies assigned in advance as control channels, and exchange communication information using a plurality of slots at other frequencies as communication channels, said mobile communication system comprising:
- at least one shared base station equipped on the common portion of the service areas of the plurality of mobile communication networks, said shared base station comprising means for time-divisionally setting the control channels assigned in advance to the plurality of mobile communication networks, and performing transmission/reception operations of control signals with mobile stations of the corresponding mobile communication network using the control channels.
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Accused Products
Abstract
In a mobile communication system according to this invention, an integrated control apparatus (ISa1) is arranged between a plurality of base stations (CSa1, CSa1, . . . ) arranged in an area with a low traffic density, and a public digital network (INW), the integrated control apparatus (ISa1) accommodates I'"'"' lines of the base stations (CSa1, CSa1, . . . ), the integrated control apparatus (ISa1) and the public digital network are connected via I'"'"' lines having a smaller number of channels than the total number of channels of the I'"'"' lines, and the integrated control apparatus (ISa1) performs various kinds of control for call origination/termination with the base stations (CSa1, CSa1, . . . ).
55 Citations
24 Claims
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1. A mobile communication system, which comprises a plurality of mobile communication networks which independently operate in service areas formed in a predetermined region to include a common portion, and in which said plurality of mobile communication networks exchange control signals between a base station and mobile stations using specific slots at different specific frequencies assigned in advance as control channels, and exchange communication information using a plurality of slots at other frequencies as communication channels, said mobile communication system comprising:
at least one shared base station equipped on the common portion of the service areas of the plurality of mobile communication networks, said shared base station comprising means for time-divisionally setting the control channels assigned in advance to the plurality of mobile communication networks, and performing transmission/reception operations of control signals with mobile stations of the corresponding mobile communication network using the control channels. - View Dependent Claims (2, 3, 4, 5)
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6. A base station apparatus used in a mobile communication system, which comprises a plurality of mobile communication networks which independently operate in service areas formed in a predetermined region to include a common portion, and in which said plurality of mobile communication networks exchange control signals between said base station apparatus and mobile stations using specific slots at different specific frequencies assigned in advance as control channels, and exchange communication information using a plurality of slots at other frequencies as communication channels, said base station apparatus comprising:
means for time-divisionally setting the control channels assigned in advance to the plurality of mobile communication networks, and performing transmission/reception operations of control signals with mobile stations of the corresponding mobile communication network using the control channels.
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7. A mobile communication system in which a plurality of base stations are distributed, and connect mobile stations located in radio zones formed by the base stations to at least a public digital network to allow communications, said mobile communication system comprising:
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an integrated control apparatus arranged between a plurality of selective base stations selected from the plurality of base stations, and the public digital network, said integrated control apparatus comprising; a first network interface for exchanging information with the public digital network via a first line; a plurality of base station interfaces for respectively exchanging information with said plurality of selective base stations via second lines; and control means for selectively connecting said plurality of selective base stations and the public digital network via the respective interfaces in accordance with call origination/termination of the mobile stations to allow information transmission. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A mobile communication system in which a plurality of base stations are distributed and connect mobile stations located in radio zones formed by the base stations to at least a public digital network to allow communications, and an integrated control apparatus is arranged between a plurality of selective base stations selected from the plurality of base stations, and the public digital network, wherein each of said selective base stations comprises:
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a radio circuit unit for exchanging information with the mobile station via a radio line; and an integrated control apparatus interface for exchanging the information exchanged by said radio circuit unit with said integrated control apparatus via a second line, and said integrated control apparatus comprises; a first network interface for exchanging information with the public digital network via a first line; a plurality of base station interfaces for respectively exchanging information with said plurality of selective base stations via second lines; and control means for executing at least control processing associated with a radio connection between the mobile station and the selective base station in accordance with call origination/termination of the mobile station, and control processing associated with a connection between the selective base station and the public digital network.
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15. An integrated control apparatus arranged between a plurality of base stations which form radio zones in different regions and connect mobile stations located in the radio zones with at least a public digital network to allow communications, and the public digital network, said integrated control apparatus comprising:
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a first network interface for exchanging information with the public digital network via a first line; a plurality of base station interfaces for respectively exchanging information with said plurality of selective base stations via second lines; and control means for selectively connecting said plurality of selective base stations and the public digital network via the respective interfaces in accordance with call origination/termination of the mobile stations to allow information transmission.
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16. A base station apparatus used in a mobile communication system which comprises a plurality of base station apparatuses which are distributed in a service area and are connected to at least a public digital network via a plurality of lines, and a plurality of mobile stations which are selectively connected to the base station apparatuses via radio lines in radio areas respectively formed by the base station apparatuses, said base station apparatus comprising:
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a plurality of radio units for divisionally forming a plurality of subareas in the radio area formed by said base station apparatus, and exchanging information with mobile stations present in the subareas via the radio lines; a database for forming and storing, in units of subareas, management information associated with mobile stations present in the radio area formed by the own base station apparatus; and an integrated control unit, which is connected to said plurality of radio units, and which, when an incoming call associated with the mobile station present in the radio area is generated, executes predetermined control associated with the incoming call of the mobile station in units of subareas on the basis of the management information stored in said database. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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Specification