| 摘要 |
PCT No. PCT/FR93/00317 Sec. 371 Date Sep. 26, 1994 Sec. 102(e) Date Sep. 26, 1994 PCT Filed Mar. 30, 1993 PCT Pub. No. WO93/20636 PCT Pub. Date Oct. 14, 1993A 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.
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