METHOD AND SYSTEM FOR MOBILE COMMUNICATIONS
First Claim
1. 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.
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Accused Products
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
18 Claims
- 1. 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.
- 3. 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.
- 5. 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.
- 7. 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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9. 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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- 10. 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.
- 12. 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.
- 14. 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.
- 16. 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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18. 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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Specification