Radio communication system, information providing device, mobile terminal, and method for providing information to mobile terminal
First Claim
1. A radio communication system that provides information to a mobile terminal via a base station that performs radio communication with the mobile terminal, whereinthe base station is capable of performing point-to-point radio communication with the mobile terminal, and capable of performing point-to-multipoint radio communication with the mobile terminal,the mobile terminal is capable of receiving first downlink information that has been transmitted from the base station by point-to-multipoint radio communication receivable by a plurality of the mobile terminals, and subsequent to receipt of the first downlink information, capable of receiving second downlink information that has been transmitted from the base station by point-to-point communication, the first downlink information including encrypted vehicular traffic information, the second downlink information including information for decrypting the encrypted vehicular traffic information of the first downlink to obtain the vehicular traffic information from the first downlink information transmitted from the base station by point-to multipoint radio communication and being used by the mobile terminal, the mobile terminal performing information processing using both the first downlink information and the second downlink information, the decryption information is valid only for decryption of the first downlink information transmitted from a base station that has transmitted the decryption information, or is valid only for decryption of the first downlink information transmitted from a plurality of specific base stations,the mobile terminal is capable of transmitting uplink information to the base station by point-to-point radio communication, the uplink information including position information of the mobile terminal, the position information being used for updating the vehicular traffic information,the base station is capable of transmitting, by the point-to-point communication, the second downlink information to the mobile terminal that transmitted the uplink information including the position information of the mobile terminal, when the base station acquires the uplink information including the position information of the mobile terminal, andthe mobile terminal that transmitted the uplink information including the position information receives, by the point-to-point radio communication, the second downlink information to obtain the vehicular traffic information from the first downlink information received by the point-to-multipoint radio communication and obtains the vehicular traffic information to be used in the mobile terminal by performing the information processing using both the first downlink information and the second downlink information.
1 Assignment
0 Petitions
Accused Products
Abstract
Downlink is achieved by point-to-multipoint communication. There is provided a radio communication system 1 that provides information to a mobile terminal 3 via a radio communication device 2 that performs radio communication with the mobile terminal 3. The mobile terminal 3 is capable of receiving first downlink information that has been transmitted by point-to-multipoint radio communication receivable by a plurality of the mobile terminals 3, and capable of receiving second downlink information that has been transmitted by point-to-point communication. The mobile terminal 3 is capable of transmitting uplink information by point-to-point radio communication. The first downlink information and the second downlink information are formed such that information to be used in the mobile terminal 3 is obtained when the mobile terminal 3 performs information processing by using both the first downlink information and the second downlink information.
27 Citations
16 Claims
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1. A radio communication system that provides information to a mobile terminal via a base station that performs radio communication with the mobile terminal, wherein
the base station is capable of performing point-to-point radio communication with the mobile terminal, and capable of performing point-to-multipoint radio communication with the mobile terminal, the mobile terminal is capable of receiving first downlink information that has been transmitted from the base station by point-to-multipoint radio communication receivable by a plurality of the mobile terminals, and subsequent to receipt of the first downlink information, capable of receiving second downlink information that has been transmitted from the base station by point-to-point communication, the first downlink information including encrypted vehicular traffic information, the second downlink information including information for decrypting the encrypted vehicular traffic information of the first downlink to obtain the vehicular traffic information from the first downlink information transmitted from the base station by point-to multipoint radio communication and being used by the mobile terminal, the mobile terminal performing information processing using both the first downlink information and the second downlink information, the decryption information is valid only for decryption of the first downlink information transmitted from a base station that has transmitted the decryption information, or is valid only for decryption of the first downlink information transmitted from a plurality of specific base stations, the mobile terminal is capable of transmitting uplink information to the base station by point-to-point radio communication, the uplink information including position information of the mobile terminal, the position information being used for updating the vehicular traffic information, the base station is capable of transmitting, by the point-to-point communication, the second downlink information to the mobile terminal that transmitted the uplink information including the position information of the mobile terminal, when the base station acquires the uplink information including the position information of the mobile terminal, and the mobile terminal that transmitted the uplink information including the position information receives, by the point-to-point radio communication, the second downlink information to obtain the vehicular traffic information from the first downlink information received by the point-to-multipoint radio communication and obtains the vehicular traffic information to be used in the mobile terminal by performing the information processing using both the first downlink information and the second downlink information.
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11. An information providing device that provides information to a mobile terminal via a base station that performs radio communication with the mobile terminal,
the base station being capable of performing point-to-point radio communication with the mobile terminal, and capable of performing point-to-multipoint radio communication with the mobile terminal, and the information providing device comprising: -
a first information providing section that provides, to the base station, first downlink information to be transmitted from the base station by point-to-multipoint communication receivable by a plurality of the mobile terminals, the first downlink information including encrypted vehicular traffic information; a second information providing section that provides, to the base station, second downlink information to be transmitted from the base station by point-to-point communication with the mobile terminal, the second downlink information including information for decrypting the encrypted vehicular traffic information of the first downlink to obtain the vehicular traffic information from the first downlink information transmitted from the base station by point-to multipoint radio communication and being used by the mobile terminal, the mobile terminal performing information processing using both the first downlink information and the second downlink information, the decryption information is valid only for decryption of the first downlink information transmitted from a base station that has transmitted the decryption information, or is valid only for decryption of the first downlink information transmitted from a plurality of specific base stations; and an acquisition section that acquires, via the base station, uplink information transmitted from the mobile terminal to the base station by the point-to-point communication, the uplink information including position information of the mobile terminal, the position information being used for updating the vehicular traffic information, wherein the second information providing section provides the second downlink information to the base station when acquiring the uplink information including the position information of the mobile terminal, the mobile terminal that transmitted the uplink information including the position information receives, subsequent to receipt of the first downlink information, by the point-to-point radio communication, the second downlink information to obtain the vehicular traffic information from the first downlink information received by the point-to-multipoint radio communication, and the mobile terminal obtains the vehicular traffic information to be used in the mobile terminal by performing the information processing using both the first downlink information and the second downlink information. - View Dependent Claims (12)
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13. A mobile terminal that performs radio communication with a base station,
the base station being capable of performing point-to-point radio communication with the mobile terminal, and capable of performing point-to-multipoint radio communication with the mobile terminal, and the mobile terminal comprising: -
a reception section capable of receiving first downlink information transmitted from the base station by point-to-multipoint radio communication also receivable by other mobile terminals, and subsequent to receipt of the first downlink information, capable of receiving second downlink information transmitted from the base station by point-to-point radio communication, the first downlink information including encrypted vehicular traffic information, the second downlink information including information for decrypting the encrypted vehicular traffic information of the first downlink to obtain the vehicular traffic information from the first downlink information transmitted from the base station by point-to-multipoint radio communication and being used by the mobile terminal, the mobile terminal performing information processing using both the first downlink information and the second downlink information, the decryption information is valid only for decryption of the first downlink information transmitted from a base station that has transmitted the decryption information, or is valid only for decryption of the first downlink information transmitted from a plurality of specific base stations; a transmission section capable of transmitting uplink information to the base station by the point-to-point communication, the uplink information including position information of the mobile terminal;
the position information being used for updating the vehicular traffic information, andan information processing section that performs the information processing using both the received first downlink information and second downlink information received from the base station; and
whereinthe reception section of the mobile terminal that transmitted the uplink information including the position information receives, by the point-to-point radio communication, the second downlink information to obtain the vehicular traffic information from the first downlink information received by the point-to-multipoint radio communication, and the information processing section of the mobile terminal that transmitted the uplink information including the position information obtains the vehicular traffic information to be used in the mobile terminal by performing the information processing using both the first downlink information and the second downlink information. - View Dependent Claims (14)
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15. A method for providing information from a base station to a mobile terminal,
the base station being capable of performing point-to-point radio communication with the mobile terminal, and capable of performing point-to-multipoint radio communication with the mobile terminal, and the method comprising: -
a step of causing the mobile terminal to receive first downlink information transmitted from the base station by point-to-multipoint radio communication receivable by a plurality of the mobile terminals, the first downlink information including encrypted vehicular traffic information, the second downlink information including information for decrypting the encrypted vehicular traffic information of the first downlink to obtain the vehicular traffic information from the first downlink information transmitted from the base station by point-to multipoint radio communication and being used by the mobile terminal, the mobile terminal performing information processing using both the first downlink information and the second downlink information, the decryption information is valid only for decryption of the first downlink information transmitted from a base station that has transmitted the decryption information, or is valid only for decryption of the first downlink information transmitted from a plurality of specific base stations; a step of the mobile terminal transmitting uplink information to the base station by point-to-point radio communication, the uplink information including position information of the mobile terminal;
the position information being used for updating the vehicular traffic information;a step of the base station that acquired the uplink information including the position information of the mobile terminal transmitting second downlink information by the point-to-point communication to the mobile terminal that transmitted the uplink information including the position information of the mobile terminal, the second downlink information being necessary information to obtain the vehicular traffic information from the first downlink information transmitted from the base station by point-to multipoint radio communication and being used by the mobile terminal, the mobile terminal performing information processing using both the first downlink information and the second downlink information; a step of the mobile terminal that transmitted the uplink information including the position information receiving, subsequent to receipt of the first downlink information, by the point-to-point radio communication, the second downlink information to obtain the vehicular traffic information from the first downlink information received by the point-to-multipoint radio communication; and a step of the mobile terminal that transmitted the uplink information including the position information obtaining the traffic information to be used in the mobile terminal by performing the information processing using both the first downlink information and the second downlink information. - View Dependent Claims (16)
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Specification