| 摘要 |
This method is used for radio communication between central and peripher al units (LST, SUP, FZ, PAC, LSA) of a traffic guidance system which, in particular, is comprised of a master terminal (LST), vehicles (FZ) and passenger information systems (PAC) and optical signal units (LSA) to control the flow of traffic, which communicate with one another via at least two voice and two data channels (SK1, SK2, DK1, DK2) in such a way that messages are transmitted from the central unit (LST) to the peripheral units (FZ, PAC) via the first data channel (DK1) and correspondingly from the peripheral units (FZ, PAC) to the central unit (LST ) via the second data channel (DK2). Further, the central and the peripheral units (LST, FZ, PAC) communicate via the first and the peripheral units (FZ) among one anoth er at close range via the second voice channel (SK1 or SK2). The peripheral units (FZ) in normal operating condition are switched to the second voice channel (SK2) and, at the same time, participate in data communication on the data channels (DK 1, DK2), so that in spite of intensive use of the short-range or voice channel (SK2) by the peripheral units (FZ), it allows smooth communication between the centra l and the peripheral units (LST, FZ, PAC, LSA).
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