Data transmission installation of the radio network type, and corresponding method
First Claim
1. A data transmission installation, comprising at least two data processing terminals, each of the at least two data processing terminals including:
- a network interface for transmitting messages on request, and collecting received messages;
a transmission/reception management device giving instructions confirming transmission or reception;
test means for defining a recognized collision; and
means for resolving collisions, following a recognized collision condition,wherein each of the at least two data processing terminals includes a multi-directional radio transmission/reception device controlled in accordance with the confirming instructions for the transmission of messages to be exchanged,and wherein in response at least to the start of an instruction confirming transmission, the radio transmission/reception device operates in rapidly alternating transmission/reception according to a pattern chosen in order to be peculiar to said each of the at least two data processing terminals,and wherein said test means is configured to recognize a collision if a signal of a level greater than a first level threshold is received during a substantial part of at least one silence in the rapidly alternating transmission/reception.
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0 Petitions
Accused Products
Abstract
A data transmission installation includes at least two data processing terminals (Pa, Pb), each equipped with a network interface (Ia, Ib) for transmitting messages on request, and collecting received messages, a transmission/reception management device (ARC) giving instructions confirming transmission or reception, a test unit for defining a recognized collision, and a unit for resolving collisions, following a recognized collision condition. Each of the data processing terminals includes a multi-directional radio transmission/reception device controlled in accordance with the confirming instructions for the transmission of messages to be exchanged. In response at least to the start of an instruction confirming transmission, the radio transmission/reception device operates in rapidly alternating transmission/reception, according to a pattern chosen in order to be peculiar to the data processing terminal. The test unit is configured to recognize a collision if a signal of a level greater than a first level threshold is received during a substantial part of at least one silence in the rapidly alternating transmission/reception.
21 Citations
27 Claims
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1. A data transmission installation, comprising at least two data processing terminals, each of the at least two data processing terminals including:
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a network interface for transmitting messages on request, and collecting received messages; a transmission/reception management device giving instructions confirming transmission or reception; test means for defining a recognized collision; and means for resolving collisions, following a recognized collision condition, wherein each of the at least two data processing terminals includes a multi-directional radio transmission/reception device controlled in accordance with the confirming instructions for the transmission of messages to be exchanged, and wherein in response at least to the start of an instruction confirming transmission, the radio transmission/reception device operates in rapidly alternating transmission/reception according to a pattern chosen in order to be peculiar to said each of the at least two data processing terminals, and wherein said test means is configured to recognize a collision if a signal of a level greater than a first level threshold is received during a substantial part of at least one silence in the rapidly alternating transmission/reception. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A data transmission method, comprising the steps of:
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providing at least two data processing terminals, each of said at least two data processing terminals being equipped with a network interface cooperating with a common transmission medium in order to transmit messages on request and collect received messages, each of said at least two data processing terminals being configured to establish instructions confirming transmission or reception; performing, in each of said at least two data processing terminals, transmission/ reception of data by radio in accordance with said confirming instructions; and performing, at least at the start of an instruction confirming transmission in one of said at least two data processing terminals, a rapidly alternating transmission/reception according to a pattern chosen so as to be peculiar to said one of said at least two data processing terminals, wherein the presence of a collision is recognized if a signal of a level greater than a first level threshold is received during a substantial part of at least one silence in the rapidly alternating transmission/reception. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification