Radio communication system with a stationary and a mobile radio device

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT FIG.
1 shows schematically the configuration of a conventional radio system, i.
e.
the configuration of a public cellular mobile radio system PLMN.
Only a single radio cell of the mobile radio system is shown to simplify the drawing.
Each radio cell is supplied by a stationary radio device BS, subsequently also referred to as base station.
The base station BS is capable of exchanging radio signals with several mobile radio devices, subsequently also referred to as mobile stations.
Only one mobile station MS is shown in FIG.
1, serving as an illustrative example for several mobile stations.
The conventional mobile system depicted in FIG.
1 is designed according to the GSM standard (GSM: Global System for Mobile Communications).
For the radio communication between the mobile stations and the base station according to the GSM standard, digital radio signals are exchanged via a radio link RIF using the TDMA access method (TDMA: Time Division Multiple Access).
The radio link RIF, subsequently also referred to as radio interface, is a FDD radio link (FDD: Frequency Division Duplex), i.
e.
a frequency duplex radio link with an upward direction UL, the so-called "uplink" and with a downward direction DL, the so-called "downlink".
The "uplink" UL includes at least one carrier frequency which can be used by the mobile stations for transmission to the base station.
The "downlink DL" includes a least one carrier frequency which can be used by the base station for transmission to the mobile stations.
For exchanging the radio signals, the GSM standard defines a radio protocol PGSM, according to which the radio link RIF is set up and according to which the radio communication is executed.
This radio protocol which is known from the GSM standard, defines first radio signals which are provided for exclusive transmission by the base station, such as for example the radio signal FB provided for synchronizing the transmission and receive frequency, the so-called "frequency correction burst"