Communication collision avoidance system
First Claim
1. A communication system, comprising:
- a first communication apparatus for transmitting a first signal on a communication medium; and
a second communication apparatus, comprising;
a transmitter for transmitting a second signal on the communication medium;
a detector for detecting the first signal on the communication medium at the time the second signal is transmitted;
signal collision judgment means for judging, by comparing a bit of the first signal to a bit of the second signal, whether a signal collision occurs on the communication medium; and
control means for controlling transmission of the second signal in response to a judgment that a signal collision has occurred, the controlling comprising;
when the compared bit of the second signal is a first value, controlling the transmitter to continue transmission of the second signal; and
when the compared bit of the second signal is a second value, controlling the transmitter to terminate transmission of the second signal.
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Accused Products
Abstract
A communication system equipped with a communication apparatus for transmitting a transmission signal to another communication apparatus via a communication medium, includes: transmission means for transmitting the transmission signal to the other communication apparatus via the communication medium; detection means for detecting a propagation signal propagated through the communication medium each time a predetermined amount of the transmission signal is transmitted from the transmission means; signal collision judgment means for judging from the propagation signal detected by the detection means whether a signal collision occurs on the communication medium between the transmission signal transmitted from the transmission means and another signal transmitted from the other communication apparatus; and control means for controlling transmission of the transmission signal from the transmission means in accordance with a judgment result by the signal collision judgment means.
62 Citations
10 Claims
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1. A communication system, comprising:
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a first communication apparatus for transmitting a first signal on a communication medium; and a second communication apparatus, comprising; a transmitter for transmitting a second signal on the communication medium; a detector for detecting the first signal on the communication medium at the time the second signal is transmitted; signal collision judgment means for judging, by comparing a bit of the first signal to a bit of the second signal, whether a signal collision occurs on the communication medium; and control means for controlling transmission of the second signal in response to a judgment that a signal collision has occurred, the controlling comprising; when the compared bit of the second signal is a first value, controlling the transmitter to continue transmission of the second signal; and when the compared bit of the second signal is a second value, controlling the transmitter to terminate transmission of the second signal.
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2. A first communication apparatus for transmitting a first signal to a second communication apparatus via a communication medium, the first communication apparatus comprising:
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a transmitter for transmitting the first signal to the second communication apparatus via the communication medium; a detector for detecting a second signal on the communication medium at the time the first signal is transmitted; signal collision judgment means for judging, by comparing a bit of the first signal to a bit of the second signal, whether a signal collision occurs on the communication medium; and control means for controlling transmission of the first signal in response to a judgment that a signal collision has occurred, the controlling comprising; when the compared bit of the first signal is a first value, controlling the transmitter to continue transmission of the first signal; and when the compared bit of the first signal is a second value, controlling the transmitter to terminate transmission of the first signal. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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9. A method of a first communication apparatus for transmitting a first signal to a second communication apparatus via a communication medium, the method comprising:
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transmitting the first signal to the second communication apparatus via the communication medium; detecting a second signal on the communication medium at the time the first signal is transmitted; judging, by comparing a bit of the first signal to a bit of the second signal, whether a signal collision has occurred on the communication medium; and controlling transmission of the first signal in response to a judgment that a signal collision has occurred, the controlling comprising; when the compared bit of the first signal is a first value, continuing transmission of the first signal; and when the compared bit of the first signal is a second value, terminating transmission of the first signal.
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10. A computer-readable storage medium storing a computer program which, when executed by a first communication apparatus, causes the first communication apparatus to perform a method for transmitting a first signal to a second communication apparatus via a communication medium, the method comprising:
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transmitting the first signal to the second communication apparatus via the communication medium; detecting a second signal on the communication medium at the time the first signal is transmitted; judging, by comparing a bit of the first signal to a bit of the second signal, whether a signal collision has occurred on the communication medium; and controlling transmission of the first signal in response to a judgment that a signal collision has occurred, the controlling comprising; when the compared bit of the first signal is a first value, continuing transmission of the first signal; and when the compared bit of the first signal is a second value, terminating transmission of the first signal.
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Specification