Patent ID: 10686519

Abstract:
The invention relates to a device for direct communication in simplex mode between mobile devices, in particular mobile phones, using carrier frequencies of a cellular mobile phone system, wherein each carrier frequency transmits a TDMA frame with a TDMA frame duration of 4.615 ms and each TDMA frame comprises 8 time slots with a duration of 577 microseconds, wherein the device comprises a hardware module which controls direct communication, wherein the device is designed to combine TDMA frames into a multi-frame which comprises 13 TDMA frames with the positions 0 to 12 and is configured in such a manner that in simplex mode the mobile devices involved constantly transmit and receive in time slots which are separate from one another and within each multi-frame in each TDMA frame only the first time slot TS0 is assigned to transmitting or receiving, while the other time slots TS1 to TS7 of the TDMA frame are left free.