Transmission method, transmission system, transmission apparatus and transmission control apparatus
First Claim
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1. A method for transmitting data among a plurality of devices connected to a network under control of a controller, the method comprising:
- using a broadcast communications transmission interval, transmitting from each of the plurality of devices in the network suspend state data indicating whether the transmitting device can be set in a suspend state; and
receiving the suspend state data in the controller.
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Abstract
The present invention allows suspend and resume processes to be carried out properly in a network such as a network according to the IEEE1394a system. If data transmission among a plurality of devices connected to a network is executed under the control of a predetermined controller, data as to whether each device can be set in a suspend state (e.g., suspend level) is notified from each device in the network to the controller using a broadcast communications transmission interval. The controller transmits a suspend state setting command based on the data.
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Citations
21 Claims
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1. A method for transmitting data among a plurality of devices connected to a network under control of a controller, the method comprising:
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using a broadcast communications transmission interval, transmitting from each of the plurality of devices in the network suspend state data indicating whether the transmitting device can be set in a suspend state; and
receiving the suspend state data in the controller. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A transmission system, comprising:
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a plurality of devices connected to a network so that said plurality of devices can transmit data to one another, said plurality of devices including a first device and a second device;
said first device including;
a memory for holding suspend state data indicating whether each of said plurality of devices can be set in a suspend state; and
an output unit operable to output said suspend state data to a broadcast communications transmission interval of said network; and
said second device including;
a receiver operable to receive said suspend state data output to said network; and
a controller operable to determine whether said first device can be set in said suspend state based on said suspend state data received by said receiver, and to control said first device based on said determination. - View Dependent Claims (9, 10, 11, 12, 13, 15, 16, 17, 18, 20, 21)
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14. A transmission apparatus connected to a network, comprising:
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a memory operable to hold suspend state data indicating whether said transmission apparatus can be set in a suspend state; and
an output unit operable to output said suspend state data held by said memory to a broadcast communications transmission interval of the network.
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19. A transmission control apparatus for controlling transmission among a plurality of devices in a network, the plurality of devices being mutually connected in a data transmittable state, said transmission control apparatus comprising:
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a receiver operable to receive suspend state data transmitted to a broadcast communications transmission interval of the network, said suspend state data indicating whether each of the plurality of devices can be set in a suspend state;
a controller operable to determine whether each of the plurality of devices in the network can be set in said suspend state based on said suspend state data received by said receiver, and to generate a command for controlling a state of each of said plurality of devices based on said determination; and
a transmitter operable to transmit said commands to the network.
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Specification