Importance

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Abstract

In conventional TDM/TDMA systems the signal blocks sent in TDMA mode from a detached unit to a central station contain a control data part whose length is derived from the signal running time in the opposite direction in TDMA mode from the central station to the detached unit at the largest distance therefrom. Any range enhancement is such a known system then leads to a longer control data part, and thus to a diminished transmission capacity for useful signals. To achieve a range enhancement without diminishing the transmission capacity, a TDM/TDMA system and a method for constructing and operating such a system are disclosed wherein, the detached units are divided into range zones and, except for the units at the largest distance from the central station, the detached units of respective range zones contain an additional, further delay, so that the transmission cycle of the detached units begins earlier than the reception cycle.

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First Claim