Method and system for mobile communications
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Abstract
When a network pages the temporary user mobile identifier of a mobile station, the mobile station sends a response to the network. Next, the network checks the authenticity of the user using a ciphering key, corresponding to the temporary user mobile identifier and a random number. If the temporary user mobile identifier is authenticated, a normal incoming call acceptance procedure is executed. If the mobile station is authenticated although the temporary user mobile identifier is wrong, the network reassigns a new temporary user mobile identifier to the mobile station and stops the current communication. In communication, the network and the mobile station mutually notify encipherment-onset time and negotiate about encipherment manner with each other. In addition, diversity handover is commenced upon a call attempt. Furthermore, if a branch replacement is necessary, the current branch is replaced by new branches capable of executing the diversity handover. Additionally, when a new call occurs to or from the mobile station capable of treating a plurality of calls simultaneously, the mobile station uses the same branch structure and the same communication frequency band for all of calls. Additionally, when a new call occurs to or from the mobile station capable of treating a plurality of calls simultaneously, a branch structure and a communication frequency band, which can continue all of the calls, are selected and used. Therefore, the mobile communications system is suitable for transmission of various sorts of data in accordance with the development of multimedia.
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Citations
42 Claims
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1. (canceled)
- 2. A base station controller communicating with a mobile station, which is able to conduct diversity reception, via a plurality of radio base stations under control of a switching center, the controller comprising enciphering means for enciphering transmitted information, which has been received from the switching center and should be transmitted to the mobile station, so as to generate enciphered transmitted information.
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3. A base station controller communicating with a mobile station, which is able to conduct diversity reception, via a plurality of radio base stations under control of a switching center, the controller comprising:
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retransmission-control-information-adding means for adding retransmission control information to enciphered transmitted information which has been previously enciphered by the switching center; and
transmitting means for transmitting the enciphered transmitted information with the retransmission control information to the radio base stations. - View Dependent Claims (12)
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5. A system for mobile communication including a mobile station which is able to conduct diversity reception, a plurality of radio base stations, and a base station controller communicating via the radio base stations under control of a switching center, the system being characterized in that the base station controller enciphers information, which should be transmitted from the side of the switching center to the side of the mobile station, before transmitting the information to the base station controller.
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6. A system for mobile communication including a mobile station which is able to conduct diversity reception, a plurality of radio base stations, and a base station controller communicating via the radio base stations under control of a switching center, the system being characterized in that the switching center enciphers information, which should be transmitted from the side of the switching center to the side of the mobile station, before distributing the information to the radio base stations.
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7. A system for mobile communication including a mobile station which is able to conduct diversity reception, a plurality of radio base stations, and a base station controller communicating via the radio base stations under control of a switching center, the system comprising layer 2-enciphering-means for enciphering information that should be processed only in one or more layers which are the same as or higher than layer 2 of the OSI reference model.
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8. A system for mobile communication including a mobile station which is able to conduct diversity reception, a plurality of radio base stations, and a base station controller communicating via the radio base stations under control of a switching center, the system comprising:
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layer-3-enciphering-means for enciphering information that should be processed only in one or more layers which are the same as or higher than layer 3 of the OSI reference model; and
layer-2-mutual-notifying-means for facilitating notification between layers of different devices corresponding to layer 2 of the OSI reference model about an onset of transmission of enciphered information.
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9. A system for mobile communication including a mobile station which is able to conduct diversity reception, a plurality of radio base stations, and a base station controller communicating via the radio base stations under control of a switching center, the system comprising:
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layer-3-enciphering-means for enciphering information that should be processed only in one or more layers which are the same as or higher than layer 3 of the OSI reference model;
retransmission control information adding means, at a layer corresponding to layer 2 of the OSI reference model, for adding retransmission control information to information which has been previously enciphered by the layer-3-enciphering-means; and
transmitting means for transmitting the enciphered transmitted information with the retransmission control information to the radio base stations.
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10. A method for controlling a base station controller communicating with a mobile station, which is able to conduct diversity reception, via a plurality of radio base stations under control of a switching center, the method comprising the step of enciphering transmitted information, which has been received from the switching center and should be transmitted to the mobile station, so as to generate enciphered transmitted information.
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11. A method for controlling a base station controller communicating with a mobile station, which is able to conduct diversity reception, via a plurality of radio base stations under control of a switching center, the method comprising the steps of:
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adding retransmission control information to enciphered transmitted information which has been previously enciphered by the switching center; and
transmitting the enciphered transmitted information with the retransmission control information to the radio base stations.
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13. A method for controlling a system for mobile communication including a mobile station which is able to conduct diversity reception, a plurality of radio base stations, and a base station controller communicating via the radio base stations under control of a switching center, the method comprising the step of, at the base station controller, enciphering information, which should be transmitted from the side of the switching center to the side of the mobile station, before distributing the information to the radio base stations.
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14. A method for controlling a system for mobile communication including a mobile station which is able to conduct diversity reception, a plurality of radio base stations, and a base station controller communicating via the radio base stations under control of a switching center, the method comprising the step of, at the switching center, enciphering information, which should be transmitted from the side of the switching center to the side of the mobile station, before distributing the information to the radio base stations.
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15. A method for controlling a system for mobile communication including a mobile station which is able to conduct diversity reception, a plurality of radio base stations, and a base station controller communicating via the radio base stations under control of a switching center, the method comprising the step of enciphering information that should be processed only in one or more layers which are the same as or higher than layer 2 of the OSI reference model.
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16. A method for controlling a system for mobile communication including a mobile station which is able to conduct diversity reception, a plurality of radio base stations, and a base station controller communicating via the radio base stations under control of a switching center, the method comprising the steps of:
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enciphering information that should be processed only in one or more layers which are the same as or higher than layer 3 of the OSI reference model; and
facilitating notification between layers of different devices corresponding to layer 2 of the OSI reference model about an onset of transmission of enciphered information.
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17. A method for controlling a system for mobile communication including a mobile station which is able to conduct diversity reception, a plurality of radio base stations, and a base station controller communicating via the radio base stations under control of a switching center, the method comprising the steps of:
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enciphering information that should be processed only in one or more layers which are the same as or higher than layer 3 of the OSI reference model;
adding retransmission control information at a layer corresponding to layer 2 of the OSI reference model to information which has been previously enciphered by the enciphering step; and
transmitting the enciphered transmitted information with the retransmission control information to the radio base stations.
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- 18. A mobile station communicating with a network over the air, comprising decipherment-onset-time-setting-means for setting a time to start deciphering an enciphered reception signal dependently on a time to start enciphering a transmission signal in the network and independently of a time to start enciphering a transmission signal in the mobile station.
- 20. A mobile station communicating with a network over the air, comprising encipherment-onset-time-setting-means for setting a time to start enciphering a transmission signal independently of a time to start deciphering an enciphered reception signal.
- 22. A controller in a network communicating with a mobile station over the air, comprising decipherment-onset-time-setting-means for setting a time to start deciphering an enciphered reception signal dependently on a time to start enciphering a transmission signal in the mobile station and independently of a time to start enciphering a transmission signal in the controller.
- 24. A controller in a network communicating with a mobile station over the air, comprising encipherment-onset-time-setting-means for setting a time to start enciphering a transmission signal independently of a time to start deciphering an enciphered reception signal.
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26. A system for mobile communication comprising a mobile station and a network communicating with each other over the air,
the network comprising: -
encipherment-onset-requesting means for transmitting an encipherment onset request to the mobile station over the air;
first-enciphered-transmission-signal-generating means for enciphering a first transmission signal which should be transmitted from the network to the mobile station after the transmission of the encipherment onset request, thereby generating a first enciphered transmission signal;
first-enciphered-transmission-signal-transmitting means for transmitting the first enciphered transmission signal to the mobile station;
response determining means for determining if an encipher onset response by the mobile station indicating that the encipherment onset request is acceptable is received or not; and
first deciphering means for starting to decipher a second enciphered transmission signal from the mobile station on the basis of the determination of the response determining means when the mobile station accepts the encipherment onset request, the mobile station comprising;
request determining means for determining if the encipherment onset request is received or not;
encipherment-onset-responding means for transmitting the encipherment onset response on the basis of the determination of the request determining means when the encipherment onset request is accepted;
second deciphering means for starting to decipher the first enciphered transmission signal from the network when the encipherment onset request is accepted;
second-enciphered-transmission-signal-generating means for enciphering a second transmission signal which should be transmitted from the mobile station to the network after the transmission of the encipherment onset response, thereby generating a second enciphered transmission signal; and
second-enciphered-transmission-signal-transmitting means for transmitting the second enciphered transmission signal to the network.
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- 27. A method for controlling a mobile station communicating with a network over the air, comprising the step of setting a time to start deciphering an enciphered reception signal dependently on a time to start enciphering a transmission signal in the network and independently of a time to start enciphering a transmission signal in the mobile station.
- 29. A method for controlling a mobile station communicating with a network over the air, comprising the step of setting a time to start enciphering a transmission signal independently of a time to start deciphering an enciphered reception signal.
- 31. A method for controlling a controller in a network communicating with a mobile station over the air, comprising the step of setting a time to start deciphering an enciphered reception signal dependently on a time to start enciphering a transmission signal in the mobile station and independently of a time to start enciphering a transmission signal in the controller.
- 33. A method for controlling a controller in a network communicating with a mobile station over the air, comprising the step of setting a time to start enciphering a transmission signal independently of a time to start deciphering an enciphered reception signal.
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35. A method for controlling a system for mobile communication in which a mobile station and a network communicate with each other over the air, the method comprising the steps of:
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transmitting an encipherment onset request from the network to the mobile station over the air;
enciphering a first transmission signal which should be transmitted from the network to the mobile station after the transmission of the encipherment onset request, thereby generating a first enciphered transmission signal;
transmitting the first enciphered transmission signal to the mobile station;
determining if an encipher onset response by the mobile station indicating that the encipherment onset request is acceptable is received or not;
starting to decipher a second enciphered transmission signal from the mobile station on the basis of the determination of the response determining step when the mobile station accepts the encipherment onset request;
determining if the encipherment onset request is received or not;
transmitting the encipherment onset response on the basis of the determination of the request determining step when the encipherment onset request is accepted;
starting to decipher the first enciphered transmission signal from the network when the encipherment onset request is accepted;
enciphering a second transmission signal which should be transmitted from the mobile station to the network after the transmission of the encipherment onset response, thereby generating a second enciphered transmission signal; and
transmitting the second enciphered transmission signal to the network.
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- 36. A mobile station communicating with a network over the air, comprising encipherment-procedure-notifying-means for notifying the network about encipherment-procedure-specifying-information specifying one or more possible encipherment procedures of the mobile station.
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37. A mobile station, wherein encipherment-procedure-notifying-means further including the enciphering key-generation-procedure-notifying-means for notifying the network about enciphering-key-generation-procedure-specifying-information specifying one or more possible enciphering key generation procedures of the mobile station.
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40. A controller in a network communicating with a mobile station over the air, comprising:
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encipherment-procedure-selecting means for selecting an encipherment procedure for communication in accordance with encipherment-procedure-specifying-information, specifying one or more possible encipherment procedures of the mobile station, notified by the mobile station; and
encipherment requesting means for notifying the mobile station about an encipherment request requesting the mobile station to conduct an encipherment using the encipherment procedure selected by the encipherment-procedure-selecting means. - View Dependent Claims (41)
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42-99. -99. (canceled)
Specification