Base station and mobile station in dedicated short range communications system
First Claim
1. A mobile station of a dedicated short range communications system capable of performing dedicated short range communications between a base station and at least one mobile station by using a radio transmission signal of a communication frame configuration having message data slots to be allocated to mobile stations, respectively, a frame control information slot including allocation information of mobile stations allocated to said message data slots, respectively, and an activation slot for a mobile station to request said base station to allocate one of said message data slots to said mobile station, each of said mobile stations comprising:
- a data processing unit that performs data processing of radio transmission signals received by and to be sent from said mobile station;
an other station allocation determination unit that determines, based on a frame control information slot of said received radio transmission signal, whether a message data slot of said received radio transmission signal is allocated to another mobile station;
a message data slot allocation request unit that requests, in an activation slot of said radio transmission signal to be sent, said base station to allocate a message data slot to said mobile station; and
a warning command unit that generates a warning command when a message data slot of said received radio transmission signal is allocated to another mobile station.
1 Assignment
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Accused Products
Abstract
A dedicated short range communications system can warn mutual approach between vehicles having mobile stations installed thereon through dedicated short range communications. Each mobile station includes: a data processing unit that performs data processing of radio transmission signals received by and to be sent from its own mobile station; and an other station allocation determination unit that determines, based on a frame control information slot of the received signal, whether a message data slot of the received signal is allocated to another mobile station. Each mobile station further includes: a message data slot allocation request unit that requests, in an activation slot of the radio transmission signal to be sent, the base station to allocate a message data slot to its own mobile station; and a warning command unit that generates a warning command when a message data slot of the received signal is allocated to another mobile station.
7 Citations
7 Claims
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1. A mobile station of a dedicated short range communications system capable of performing dedicated short range communications between a base station and at least one mobile station by using a radio transmission signal of a communication frame configuration having message data slots to be allocated to mobile stations, respectively, a frame control information slot including allocation information of mobile stations allocated to said message data slots, respectively, and an activation slot for a mobile station to request said base station to allocate one of said message data slots to said mobile station, each of said mobile stations comprising:
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a data processing unit that performs data processing of radio transmission signals received by and to be sent from said mobile station; an other station allocation determination unit that determines, based on a frame control information slot of said received radio transmission signal, whether a message data slot of said received radio transmission signal is allocated to another mobile station; a message data slot allocation request unit that requests, in an activation slot of said radio transmission signal to be sent, said base station to allocate a message data slot to said mobile station; and a warning command unit that generates a warning command when a message data slot of said received radio transmission signal is allocated to another mobile station. - View Dependent Claims (2, 3, 4)
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5. A mobile station of a dedicated short range communications system capable of performing dedicated short range communications between a base station and at least one mobile station by using a radio transmission signal of a communication frame configuration having message data slots to be allocated to mobile stations, respectively, a frame control information slot including allocation information of mobile stations allocated to said message data slots, respectively, and an activation slot for a mobile station to request said base station to allocate one of said message data slots to its own station, each of said mobile stations comprising:
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a data processing unit that performs data processing of radio transmission signals received by and to be sent from its own mobile station; a message data slot allocation unit that allocates a new message data slot to a new mobile station when there is a message data slot allocation request from said new mobile station; and a danger notification unit that creates danger notification data for notifying the existence of another mobile station in a communicable area of said base station, and sends said danger notification data to said new mobile station to which the new message data slot has been allocated.
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6. A mobile station of a dedicated short range communications system capable of performing dedicated short range communications between a base station and at least one mobile station by using a radio transmission signal of a communication frame configuration having message data slots to be allocated to mobile stations, respectively, a frame control information slot including allocation information of mobile stations allocated to said message data slots, respectively, and an activation slot for a mobile station to request said base station to allocate one of said message data slots to its own station, each of said mobile stations comprising;
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a data processing unit that performs data processing of radio transmission signals received by and to be sent from its own mobile station; a message data slot allocation unit that allocates a new message data slot to a new mobile station when there is a message data slot allocation request from said new mobile station; and a danger notification data that creates danger notification data for notifying the entry of another mobile station, to which the new message data slot has already been allocated, into a communicable area of said base station, and sends said danger notification data to mobile stations which exist in said communicable area of said base station.
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7. A dedicated short range communications system having a plurality of mobile stations, wherein dedicated short range communications between a base station and at least one mobile station is performed by using a radio transmission signal of a communication frame configuration having message data slots to be allocated to mobile stations, respectively, a frame control information slot including allocation information of mobile stations allocated to said message data slots, respectively, and an activation slot for a mobile station to request said base station to allocate one of said message data slots to said mobile station, each of said plurality of mobile stations comprising:
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a data processing unit that performs data processing of radio transmission signals received by and to be sent from said mobile station; an other station allocation determination unit that determines, based on a frame control information slot of said received radio transmission signal, whether a message data slot of said received radio transmission signal is allocated to another mobile station; a message data slot allocation request unit that requests, in an activation slot of said radio transmission signal to be sent, said base station to allocate a message data slot to said mobile station; and a warning command unit that generates a warning command when a message data slot of said received radio transmission signal is allocated to another mobile station.
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Specification