Information transmission device, system, and method
First Claim
Patent Images
1. An information transmitting device for transmitting first information to one or more destination devices, the information transmitting device comprising:
- a memory for storing second information indicating whether or not each destination device requires power-saving handshaking in order to receive the first information;
a control unit for selecting at least a power-saving transmission mode and a normal transmission mode according to the second information stored in the memory, the power-saving transmission mode including transmitting and receiving of power-saving handshaking signals, the normal transmission mode excluding the transmitting and the receiving of the power-saving handshaking signals; and
a communication unit for transmitting the first information in the mode selected by the control unit,wherein the control unit has the communication unit transmit third information indicating whether or not the information transmitting device itself requires the power-saving handshaking in order to receive incoming transmissions of fourth information.
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Abstract
A network includes nodes that transmit information to each other. Some nodes operate intermittently; other nodes operate continuously. Information is transmitted to an intermittently operating node by a handshaking protocol in which the intermittently operating node indicates that it is ready to receive. Information is transmitted to a continuously operating node without such handshaking, thereby saving time and power. Each transmitting node has a memory storing information indicating which other nodes require handshaking.
6 Citations
14 Claims
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1. An information transmitting device for transmitting first information to one or more destination devices, the information transmitting device comprising:
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a memory for storing second information indicating whether or not each destination device requires power-saving handshaking in order to receive the first information; a control unit for selecting at least a power-saving transmission mode and a normal transmission mode according to the second information stored in the memory, the power-saving transmission mode including transmitting and receiving of power-saving handshaking signals, the normal transmission mode excluding the transmitting and the receiving of the power-saving handshaking signals; and a communication unit for transmitting the first information in the mode selected by the control unit, wherein the control unit has the communication unit transmit third information indicating whether or not the information transmitting device itself requires the power-saving handshaking in order to receive incoming transmissions of fourth information. - View Dependent Claims (2, 3, 4, 5, 6, 14)
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7. An information transmitting system comprising a plurality of nodes, the plurality of nodes including at least a first node that operates continuously, a second node that operates intermittently, and a third node that transmits at least first information to the first node and second information to the second node, wherein:
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the first node is operable to receive the first information without power-saving handshaking and includes a first control unit, and a first communication unit controlled by the first control unit to receive the first information from the third node and transmit third information to the third node, the third information indicating that the second first node does not require the power-saving handshaking; the second node is operable to receive the second information with the power-saving handshaking and includes a second control unit, and a second communication unit controlled by the second control unit to receive the second information from the third node; and the third node includes a memory for storing information identifying nodes requiring the power-saving handshaking, a third control unit for storing the third information in the memory, and a third communication unit controlled by the third control unit according to the third information stored in the memory to transmit the second information preceded by power-saving handshaking signals to the second node and to transmit the first information without the power-saving handshaking signals to the first node, wherein the first control unit has the first communication unit transmit the third information at first periodic intervals and the second control unit has the second communication unit transmit the ready-to-receive signal at second periodic intervals, and the first periodic intervals are longer than the second periodic intervals. - View Dependent Claims (8)
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9. A method of transmitting first information from an information transmitting device to a destination device, comprising:
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obtaining second information indicating whether or not the destination device requires power-saving handshaking; storing the second information in a memory in the information transmitting device; selecting at least a power-saving transmission mode and a normal transmission mode according to the second information stored in the memory, the power-saving transmission mode including transmitting and receiving of power-saving handshaking signals, the normal transmission mode excluding the transmitting and the receiving of the power-saving handshaking signals; and transmitting the first information in the selected mode, wherein transmitting the first information in the power-saving transmission mode comprises; waiting to receive a predetermined signal; transmitting an acknowledging signal after receiving the predetermined signal; and transmitting the first information after transmitting the acknowledging signal, and the second information is included in the predetermined signal. - View Dependent Claims (10, 11, 12, 13)
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Specification