Mobile radio communication system having mobile base and portable devices as a mobile station
First Claim
1. A mobile radio communication system comprising:
- a base station connected to a communication network by a wired communication path;
a mobile base device connectable to said base station over one of a first plurality of time-division multiple access radio channels, each one of the first plurality of time-division multiple access radio channels defined by a radio frequency and a time slot;
at least one portable device connectable to said mobile base device over one of a second plurality of time-division multiple access radio channels, each one of the second plurality of time-division multiple access radio channels defined by a radio frequency and a time slot,wherein said mobile base device includes;
a first connection control means for searching the first plurality of time-division multiple access radio channels for an idle radio channel and establishing a radio connection between said base station and said mobile base device over a first radio channel found during the search of the first plurality of time-division multiple access radio channels;
a second connection control means for searching the second plurality of time-division multiple access radio channels for an idle radio channel having time slots in a predetermined relationship with time slots of the first radio channel and establishing a radio connection between said portable device and said mobile base device over a second radio channel found during the search of the second plurality of time-division multiple access radio channels; and
a third connection control means for connecting the first radio channel and the second radio channel in order to establish a radio communication path between said base station and said portable device.
1 Assignment
0 Petitions
Accused Products
Abstract
A mobile radio communication system according to the invention comprises a base station to be connected with a communication network by way of a wired communication path, a mobile base device to be connected with the base station by way of a first radio channel selected from a plurality of first radio channels and a portable device to be connected with the mobile base device by way of a second radio channel selected from a plurality of second radio channels. Each of the first and second radio channels defined by a radio frequency and a time slot. The mobile base device comprises first, second and third connection control circuits. The first connection control circuit is used to select an idle first radio channel out of the first radio channels in cooperation with the base station and connect the mobile base device with the base station by the selected idle first radio channel. The second connection control circuit is used to select a radio channel having an idle time slot showing a specific relationship with the first radio channel selected by the first connection control circuit and connect the mobile base device and the portable device by the selected idle second radio channel. The third connection control circuit is used to connect the first and second radio channels and establish a telephone communication path between the base station and the portable device.
-
Citations
29 Claims
-
1. A mobile radio communication system comprising:
-
a base station connected to a communication network by a wired communication path; a mobile base device connectable to said base station over one of a first plurality of time-division multiple access radio channels, each one of the first plurality of time-division multiple access radio channels defined by a radio frequency and a time slot; at least one portable device connectable to said mobile base device over one of a second plurality of time-division multiple access radio channels, each one of the second plurality of time-division multiple access radio channels defined by a radio frequency and a time slot, wherein said mobile base device includes; a first connection control means for searching the first plurality of time-division multiple access radio channels for an idle radio channel and establishing a radio connection between said base station and said mobile base device over a first radio channel found during the search of the first plurality of time-division multiple access radio channels; a second connection control means for searching the second plurality of time-division multiple access radio channels for an idle radio channel having time slots in a predetermined relationship with time slots of the first radio channel and establishing a radio connection between said portable device and said mobile base device over a second radio channel found during the search of the second plurality of time-division multiple access radio channels; and a third connection control means for connecting the first radio channel and the second radio channel in order to establish a radio communication path between said base station and said portable device. - View Dependent Claims (2, 3, 4)
-
-
5. A method of connecting radio channels in a mobile radio communication system comprising a base station connected to a communication network by a wired communication path, a mobile base device connectable to said base station over one of a first plurality of time-division multiple access radio channels, each one of the first plurality of time-division multiple access radio channels defined by a radio frequency and a time slot, and at least one portable device connectable to said mobile base device over one of a second plurality of time-division multiple access radio channels, each one of the second plurality of time-division multiple access radio channels defined by a radio frequency and a time slot, the method comprising the steps of:
-
searching the first plurality of time-division multiple access radio channels for an idle radio channel and establishing a radio connection between said base station and said mobile base device over a first radio channel found during the search of the first plurality of time-division multiple access radio channels; searching the second plurality of time-division multiple access radio channels for an idle radio channel having time slots in a predetermined relationship with time slots of the first radio channel and establishing a radio connection between said portable device and said mobile base device over a second radio channel found during the search of the second plurality of time-division multiple access radio channels; and connecting the first radio channel and the second radio channel in order to establish a radio communication path between said base station and said portable device.
-
-
6. A mobile base device for use in a radio communication system including a base station connected to a communication network by a wired communication path, said mobile base device comprising:
-
a first communication means for communicating with said base station over one of a first plurality of time-division multiple access radio channels, each one of the first plurality of time-division multiple access radio channels defined by a radio frequency and a time slot; a second communication means for communicating with at least one portable device over one of a second plurality of time-division multiple access radio channels, each one of the second plurality of time-division multiple access radio channels defined by a radio frequency and a time slot; a first connection control means for searching the first plurality of time-division multiple access radio channels for an idle radio channel and establishing a radio connection between said base station and said first communication means over a first radio channel found during the search of the first plurality of time-division multiple access radio channels; a second connection control means for searching the second plurality of time-division multiple access radio channels for an idle radio channel having time slots in a predetermined relationship with the time slots of the first radio channel and establishing a radio connection between said portable device and said second communication means over a second radio channel found during the search of the second plurality of time-division multiple access radio channels; and a third connection control means for connecting the signal path of said first communication means and the signal path of said second communication means in order to establish a radio communication path between said base station and said portable device. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A mobile radio communication system comprising:
-
a base station connected to a communication network by a wired communication path; a mobile device connectable to said base station over one of a first plurality of time-division multiple access radio channels, each one of the first plurality of time-division multiple access radio channels defined by a radio frequency and a time slot; at least one portable device connectable to said mobile base device over one of a second plurality of time-division multiple access radio channels, each one of the second plurality of time-division multiple access radio channels defined by a radio frequency and a time slot; and a fixed communication device connected to said mobile base device by wired lines, wherein said mobile base device includes; a first connection control means for searching the first plurality of time-division multiple access radio channels for an idle radio channel and establishing a radio connection between said base station and said mobile base device over a first radio channel found during the search of the first plurality of time-division multiple access radio channels; a second connection control means for searching the second plurality of time-division multiple access radio channels for an idle radio channel having time slots in a predetermined relationship with time slots of the first radio channel and establishing a connection between said portable device and said mobile base device over a second radio channel found during the search of the second plurality of time-division multiple access radio channels; and a third connection control means for selectively connecting at least two of the first radio channel, the second radio channel, and said fixed communication device to each other. - View Dependent Claims (12, 13, 14)
-
-
15. A mobile radio communication system comprising:
-
a base station connected to a communication network by a wire communication path; a mobile base device connectable to said base station over one of a first plurality of time-division multiple access radio channels; and a portable device connectable to said mobile base device over one of a second plurality of time-division multiple access radio channels, wherein said mobile base device includes; means for searching the first plurality of time-division multiple access radio channels for an idle radio channel having predetermined characteristics; means for searching the second plurality of time-division multiple access radio channels for an idle radio channel having characteristics with a predetermined relationship to the characteristics of a radio channel found during the search of the first plurality of time-division multiple access radio channels; and means for connecting the respective radio channels found during the searches of the first and second pluralities of time-division multiple access radio channels to establish a radio communication path between said base station and said portable device.
-
-
16. A method of connecting radio channels in a mobile radio communication system comprising a base station connected to a communication network by a wired communication path, a mobile base device connectable to said base station over one of a first plurality of time-division multiple access radio channels, and a portable device connectable to said mobile base device over one of a second plurality of time-division multiple access radio channels, the method comprising the steps of:
-
searching the first plurality of time-division multiple access radio channels for an idle radio channel having predetermined characteristics; searching the second plurality of time-division multiple access radio channels for an idle radio channel having characteristics with a predetermined relationship with to the characteristics of the radio channel found during the search of the first plurality of time-division multiple access radio channels; and connecting the respective radio channels found during the searches of the first and second pluralities of time-division multiple access radio channels to establish a radio communication path between said base station and said portable device.
-
-
17. A mobile communication apparatus having a first radio unit and a second radio unit for use in a radio communication system wherein a geographical area is served by a plurality of base stations, each of said base stations covering a zone of the geographical area, said mobile communication apparatus comprising:
-
first connection control means for selecting one of a plurality of time-division multiple access radio channels each characterized by a frequency and a time slot and for establishing a first radio link between one of said base stations and said first radio unit over the selected one of the first plurality of time-division multiple access radio channels; and second connection control means for selecting one of a second plurality of time-division multiple access radio channels each characterized by a frequency and a time slot and for establishing a second radio link between said first radio unit and said second radio unit over the selected one of the second plurality of time-division multiple access radio channels, the selected one of the second plurality of time-division multiple access radio channels having characteristics determined by the characteristics of the selected one of the first plurality of time-division multiple access radio channels, whereby a communication link between said one base station and said second radio unit is established, and wherein time slots for the second radio link are determined on the basis of the time slots utilized for the first radio link. - View Dependent Claims (18, 19)
-
-
20. A method of establishing a communication link between a first radio unit and a base station in a radio communication system wherein a geographical area is served by a plurality of base stations, each of said base stations covering a zone, the method comprising the steps of:
-
providing a second radio unit including a transmitter having a transmission power level which is greater than a transmission power level of said first radio unit; establishing a first radio link between said base station and said second radio unit over a first radio channel selected from a first plurality of time-division multiple access channels each characterized by a frequency and a time slot; and establishing a second radio link between said second radio unit and said first radio unit over a second radio channel selected from a second plurality of time-division multiple access channels each characterized by a frequency and a time slot, the second radio channel having characteristics determined by the characteristics of the first radio channel, whereby a communication link between said base station and said first radio unit is established, wherein the time slots for the second radio link are determined on the basis of the time slots utilized for the first radio link. - View Dependent Claims (21, 22)
-
-
23. A method of establishing a communication link between a first radio unit and a base station in a radio communication system wherein a geographical area is served by a plurality of base stations, each of said base stations covering a zone of the geographic area, the method comprising the steps of:
-
providing a second radio unit including a transmitter having a transmission power level which is greater than a transmission power level of said first radio unit; establishing a first radio link between said base station and said second radio unit over a first radio channel by selecting one of a first plurality of time-division multiple access (TDMA) radio channels each characterized by a frequency and a time slot; and establishing a second radio link between said second radio unit and said first radio unit over the first radio channel by selecting one of a second plurality of time-division multiple access (TDMA) radio channels each characterized by a frequency and a time slot, wherein time slots for the second radio link are assigned on the basis of the time slots assigned for the first radio link, whereby a communication link between said base station and said first radio unit is established. - View Dependent Claims (24)
-
-
25. A mobile base apparatus used in radio communication system having a plurality of base stations which have radio communication zones, respectively, said mobile base apparatus and a mobile terminal apparatus, which are used in said radio communication zones, said mobile base apparatus comprising:
-
first establishing means for searching a first plurality of time-division multiple access radio channels, which are respectively defined by radio frequencies and time slots, to select a first time-division multiple access channel which is idle, and establishing a first radio link between one of said base stations and said mobile base apparatus over said selected first time-division multiple access radio channel; second establishing means for searching a second plurality of time-division multiple access radio channels, which are respectively defined by radio frequencies and time slots, to select a second time-division multiple access radio channel which is idle, and establishing a second radio link between said mobile base apparatus and said mobile terminal apparatus over said selected second time-division multiple access radio channel a time slot which define said selected first time-division multiple access radio channel differing from a frequency and a time slot which define said selected first time-division multiple access radio channel, said time slot of said selected second time-division multiple access radio channel being selected in accordance with the position of said time slots of said selected first time-division multiple access radio channel; first communication means for transmitting and receiving a communication signal to and from one of said base stations through said first radio link; and second communication means for transmitting and receiving a communication signal to and from said mobile terminal apparatus through said second radio link. - View Dependent Claims (26, 27)
-
-
28. A mobile base apparatus used in a radio communication system having a plurality of base stations which have radio communication zones, respectively, a mobile base apparatus and a mobile terminal apparatus, which are used in said radio communication zones, said mobile base apparatus comprising:
-
first establishing means for searching a first plurality of time-division multiple access radio channels, which are respectively defined by radio frequencies and time slots, to select a first time-division multiple access radio channel which is idle, and establishing a first radio link between one of said stations and said mobile base apparatus over said selected first time-division multiple access radio channel; second establishing means for searching a second plurality of time-division multiple access radio channels, which are respectively defined by radio frequencies and time slots, to select a second time-division multiple access radio channel being idle and having a predetermined relationship with said first time-division multiple access radio channel, and establishing a second radio link between said mobile base apparatus and said mobile terminal apparatus over said selected second time-division multiple access radio channel; connection means for connecting said first radio link to said second radio link, and establishing a communication link between said one of said base stations and said mobile terminal apparatus; first communication means for sending and receiving a communication signal to and from said one of said base stations through said first radio link; second communication means for sending or receiving a communication signal to or from said mobile terminal apparatus through said second radio link; and control means for controlling a transmitting power level of said second communication means so that said transmitting power level is lower than a transmitting power level of said first communication means.
-
-
29. A mobile base apparatus used in a radio communication system having a plurality of base stations which have radio communication zones, respectively, said mobile base apparatus and a mobile terminal apparatus, which are used in said radio communication zones, said mobile base apparatus comprising:
-
first establishing means for searching a first plurality of radio channels which are respectively defined by radio frequencies and time slots, to select a first radio channel which is idle, and establishing a first radio link between one of said base stations and said mobile base apparatus over said selected first radio channel; second establishing means for searching a second plurality of radio channels, which are respectively defined by radio channels, which are respectively defined by radio frequencies and time slots, to select a second radio channel being idle and having a predetermined relationship with said selected first radio channel, and establishing a second radio link between said mobile base apparatus and said mobile terminal apparatus over said selected second radio channel; connection means for connecting said first radio link to said second radio link, and establishing a communication link between one of said base stations and said mobile terminal apparatus; first communication means for sending and receiving a communication signal to and from said one of said base stations through said first radio link; and second communication means, having a transceiver which is used in common by said first communication means, for sending and receiving a communication signal to and from said mobile terminal apparatus through said second radio link.
-
Specification