Vehicular communication terminal
First Claim
1. A vehicular communication terminal comprising:
- a wireless communicator that wirelessly communicates with a service provider terminal, the service provider terminal providing a predetermined service by using a control channel and any one of a plurality of service channels, the control channel being used to provide connection control for communication, the service channels being different from the control channel and assigned to provide the service; and
a wireless communication controller that controls operations of the wireless communicator;
wherein the wireless communicator is adapted to receive at least service initiation information including service type information and service channel information, the service type information being transmitted on the control channel from the service provider terminal and indicative of type of service provided by the service provider terminal, the service channel information designating one of the service channels that is to be used for communication between the service provider terminal and the vehicular communication terminal;
the vehicular communication terminal further comprising;
a reception strength acquirer that acquires reception strength of a signal transmitted from the service provider terminal and received by the wireless communicator; and
a transmission terminal determiner that, when the wireless communicator receives a signal corresponding to the service initiation information from the service provider terminal, determines, based on at least either one of magnitude of the reception strength of the received signal acquired by the reception strength acquirer and a degree of reception strength change in signal received from the service provider terminal serving as a transmission source of the received signal corresponding to the service initiation information, whether the transmission source of the received signal corresponding to the service initiation information is the service provider terminal that provides a service targeted for the vehicular communication terminal, wherein the transmission source of the received signal corresponding to the service initiation information is referred to as a transmission terminal,whereinuntil the transmission terminal determiner determines that the transmission terminal is the service provider terminal that provides the service targeted for the vehicular communication terminal, the wireless communication controller does not initiate communication with the transmission terminal by using the service channel designated by the service channel information included in the service initiation information transmitted from the transmission terminal.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicular communication terminal is provided. A reception strength acquirer acquires a reception strength of a signal transmitted from a service provider terminal. When the vehicle communication terminal receives a signal corresponding to service initiation information from the service provider terminal, a transmission terminal determiner determines whether a transmission source of the signal is the service provider terminal that provides a service targeted for the vehicular communication terminal, based on at least either one of magnitude of the reception strength of the received signal acquired by the reception strength acquirer and a degree of reception strength change in signal received from the service provider terminal serving as a transmission source of the received signal.
8 Citations
10 Claims
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1. A vehicular communication terminal comprising:
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a wireless communicator that wirelessly communicates with a service provider terminal, the service provider terminal providing a predetermined service by using a control channel and any one of a plurality of service channels, the control channel being used to provide connection control for communication, the service channels being different from the control channel and assigned to provide the service; and a wireless communication controller that controls operations of the wireless communicator; wherein the wireless communicator is adapted to receive at least service initiation information including service type information and service channel information, the service type information being transmitted on the control channel from the service provider terminal and indicative of type of service provided by the service provider terminal, the service channel information designating one of the service channels that is to be used for communication between the service provider terminal and the vehicular communication terminal; the vehicular communication terminal further comprising; a reception strength acquirer that acquires reception strength of a signal transmitted from the service provider terminal and received by the wireless communicator; and a transmission terminal determiner that, when the wireless communicator receives a signal corresponding to the service initiation information from the service provider terminal, determines, based on at least either one of magnitude of the reception strength of the received signal acquired by the reception strength acquirer and a degree of reception strength change in signal received from the service provider terminal serving as a transmission source of the received signal corresponding to the service initiation information, whether the transmission source of the received signal corresponding to the service initiation information is the service provider terminal that provides a service targeted for the vehicular communication terminal, wherein the transmission source of the received signal corresponding to the service initiation information is referred to as a transmission terminal, wherein until the transmission terminal determiner determines that the transmission terminal is the service provider terminal that provides the service targeted for the vehicular communication terminal, the wireless communication controller does not initiate communication with the transmission terminal by using the service channel designated by the service channel information included in the service initiation information transmitted from the transmission terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification