Device and method for controlling communication
First Claim
1. A device for controlling communication, comprising:
- a transmission device having transmission means for transmitting identical information with a communication number indicating a transmission number thereof a plurality of times repeatedly, and communication number counting means for incrementing the communication number every time the identical information is transmitted, and setting a communication number which is greater than the last incremented communication number as an initial communication number at the time of transmission of renewed information; and
a receiving device having connected with the transmission device through transmission lines, said receiving device capable of receiving the information out of a plurality of pieces of the identical information repeatedly transmitted from the transmission device, said receiving device having information determination means for determining whether or not information received from the transmission device conforms with registration information which was registered previously, communication number comparison means for determining whether or not the communication number attached to the received information is greater than a registered communication number which was registered previously, and control means for adding a predetermined value to the registered communication number when the received information is determined by the information determination means as conforming with the registered information and the communication number attached to the received information is determined by the communication number comparison means to be greater than the registered communication number, such that the added-to registered communication number becomes greater than said last incremented communication number and less than said initial communication number.
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Accused Products
Abstract
A transmission unit transmits the identical transmitting information including a communication number information. A communication number counting unit increments the communication number information every time the identical transmitting information is transmitted, sets the communication number information which is greater than the incremented last communication number information to an initial communication number information when a renewed transmitting information is transmitted, and increments the initial communication number every time the renewed transmitting information is transmitted. An information discrimination unit discriminates whether or not a receiving transmission information conforms with a registration transmitting information. A communication number information comparison unit compares a receiving communication number information with a registration communication number information. A control unit adds a predetermined value to the receiving communication number information when the receiving transmission information conforms with the registration transmitting information and the received communication number information is greater than the registration communication number information.
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Citations
22 Claims
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1. A device for controlling communication, comprising:
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a transmission device having transmission means for transmitting identical information with a communication number indicating a transmission number thereof a plurality of times repeatedly, and communication number counting means for incrementing the communication number every time the identical information is transmitted, and setting a communication number which is greater than the last incremented communication number as an initial communication number at the time of transmission of renewed information; and a receiving device having connected with the transmission device through transmission lines, said receiving device capable of receiving the information out of a plurality of pieces of the identical information repeatedly transmitted from the transmission device, said receiving device having information determination means for determining whether or not information received from the transmission device conforms with registration information which was registered previously, communication number comparison means for determining whether or not the communication number attached to the received information is greater than a registered communication number which was registered previously, and control means for adding a predetermined value to the registered communication number when the received information is determined by the information determination means as conforming with the registered information and the communication number attached to the received information is determined by the communication number comparison means to be greater than the registered communication number, such that the added-to registered communication number becomes greater than said last incremented communication number and less than said initial communication number. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A transmission device connected with a receiving device through transmission lines allowing the receiving device to receive information once out of plurality of transmissions from the transmission device, comprising:
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storage means for storing destination information indicating transmitting identification information and receiving identification information, control information for controlling the receiving device and a communication number indicating a transmission number; unidirectional function means for generating a certifier by inputting each information stored in said storage means and a certifying key into a unidirectional function; combining means for generating information by combining the certifier with the destination information and control information and attaching a communication number stored in said storage means and for transmitting generated information with the communication number a plurality of times repeatedly; and communication number counting means for incrementing the communication number attached information which is generated by said combining means every time the identical information is transmitted, and setting a communication number which is greater than the last incremented communication number as an initial communication number and greater than the registered communication number which is held by the receiving device at the time of transmission of renewed information.
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11. A receiving device connected with a transmission device having transmission means for transmitting identical information with a communication number indicating a transmission number a plurality of times repeatedly, and communication number counting means for incrementing the communication number every time the identical information is transmitted, and setting a communication number which is greater than the last incremented communication number as an initial communication number at the time of transmission of renewed information, by means of transmission lines allowing the receiving device to receive the information once out of the plurality of times of transmissions from the transmission device, the receiving device comprising:
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information determination means for determining whether or not information received from the transmission device conforms with registered information which was registered previously; communication number information comparison means for determining whether or not the received communication number attached to the received information is greater than a registered communication number which was registered previously; and control means for adding a predetermined value to the registered communication number, when the received information is determined by the information determination means as conforming with the registered information and the communication number attached to the received information is determined by the communication number comparison means as greater than the registered communication number, so that the added-to registered communication number becomes greater than said last incremented communication number and less than said initial communication number.
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12. A method for controlling communication, comprising:
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a transmission step having an information transmitting step for repeatedly transmitting identical information with a communication number indicating a transmission number thereof a plurality of times, and a communication number counting step for incrementing the communication number every time the identical information is transmitted and setting a communication number which is greater than the last incremented communication number as an initial communication number at the time of transmission of renewed information; and a receiving step for receiving the information out of a plurality of pieces of the identical information repeatedly transmitted in the transmission step, said receiving step comprising an information determination step for determining whether or not information received from a transmission device conforms with registration information which was registered previously;
a communication number comparison step for determining whether or not the communication number attached to the received information is greater than a registered communication number which was registered previously; and
a control step for adding a predetermined value to the registered communication number when the received information is determined in the information determination step as conforming with the registrated information and the communication number attached to the received information is determined in the communication number comparison step to be greater than the registered communication number, such that the added-to registered communication number becomes greater than said last incremented communication number and less than said initial communication number. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A transmission method including a transmission device connected with a receiving device through lines allowing the receiving device to receive information once out of plurality of times of transmissions from the transmission device, the method comprising:
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a storage step for storing a destination information indicating transmitting identification information and receiving identification information, control information for controlling the receiving device and a communication number indicating a transmission number; a unidirectional function step for generating a certifier by inputting each information stored in said storage step and a certifying key into a unidirectional function; a combining step for generating information by combining the certifier with the destination information and control information and attaching a communication number stored in said storage step and for transmitting generated information with the communication number a plurality of times repeatedly; and a communication number counting step for incrementing the communication number attached information which is generated in said combining step every time the identical information is transmitted, and setting the communication number which is greater than the last incremented communication number as an initial communication number and greater than the registered communication number which is held by the receiving device at the time of transmission of renewed information.
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22. A receiving method including a receiving device connected with a transmission device for repeatedly transmitting identical information with a communication number indicating a transmission number a plurality of times, and incrementing the communication number every time the identical information is transmitted, and setting a communication number which is greater than the last incremented communication number as an initial communication number at the time of transmission of renewed information, by means of transmission lines allowing the receiving device to receive the information once out of the plurality of transmissions from the transmission device, the receiving method comprising;
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an information determination step for determining whether or not information received from the transmission device conforms with registered information which was registered previously; a communication number information comparison step for determining whether or not the received communication number attached to the received information is greater than a registered communication number which was registered previously; and a control step for adding a predetermined value to the registered communication number, when the received information is determined in the information determination step as conforming with the registered information and the communication number attached to the received information is determined in the communication number comparison step as greater than the registered communication number, so that the added-to registered communication number becomes greater than said last incremented communication number and less than said initial communication number.
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Specification