Abstract: The invention relates to the transfer of a message signal between a transmitter device and a receiver device wherein the message transfer is based on a predefined signal frame structure using a concrete syntax notation. To improve the reliability of transferring a message signal, in particular, control and/or signaling messages, at least one additional check information element is embedded within at least one unused portion of the frame structure.

Abstract: A GSM transceiver for use in a GSM network is disclosed. The transceiver includes a multilayer protocol stack for executing a plurality of asynchronous tasks which are encoded with a universal and generic instruction set used for communicating between and synchronizing the tasks; a multitasking operating system having a set of operating system instructions and providing prioritized execution of the tasks by execution of the operating system instructions; an operating system interface causing instructions of the universal instruction set to be carried out by the multitasking operating system so that each universal instruction of the universal instruction set is executed as a sequence of at least one instruction of the operating system instruction set; and at least one processor controlled by the operating system to execute the asynchronous tasks.

Abstract: A GSM transceiver for use in a GSM network and a method of use of the GSM transceiver is disclosed. The GSM transceiver includes a multilayer protocol stack for executing a plurality of asynchronous tasks, the multilayer protocol stack including a radio resources management entity for controlling a physical layer and a data link layer of the multilayer protocol stack for establishing and maintaining a wireless link between the transceiver and the GSM network and a mobility management entity for establishing and authenticating services provided by the GSM network to the transceiver; and at least one processor for executing the plurality of asynchronous tasks of the multilayer protocol stack; and wherein only the radio resources management entity synthesizes channel establishment messages transmitted by the GSM transceiver to the GSM network and only the mobility management entity makes decisions to establish channels between the transceiver and the GSM network.

Abstract: A method of tracing execution of a computer program of a data processing system with print messages is disclosed.