Testing a Receiver of Wireless Messaging Device

1 . A method for testing a receiver of a wireless messaging device in a mobile communication system, comprising:

generating, in a production stage of the wireless messaging device a test signal which contains physical time-slots, at least one of which is allocated for transmission of system information from a base transceiver station of the mobile communication system to the messaging device; and

positioning a synchronization sequence supported by the mobile communication system in a time-slot allocated for transmission of system information.

2 . A method according to claim 1 further comprising:

converting the test signal to radio frequency; and

transmitting the test signal to the receiver at the radio frequency.

3 . A method according to claim 1 , wherein positioning comprises positioning a frequency synchronization sequence supported by the mobile communication system in a time-slot allocated for transmission of system information, the method further comprising:

identifying the frequency synchronization sequence from the test signal; and

frequency-synchronizing the receiver by means of the frequency synchronization sequence.

4 . A method according to claim 1 , wherein positioning comprises positioning a time synchronization sequence supported by the mobile communication system in a time-slot allocated for transmission of system information, the method further comprising:

identifying the time synchronization sequence from the test signal; and

time-synchronizing the receiver by means of the time synchronization sequence.

5 . A method according to claim 1 , wherein positioning comprises:

positioning a frequency synchronization sequence supported by the mobile communication system in the first time-slot allocated for transmission of system information; and

positioning a time synchronization sequence supported by the mobile communication system in the second time-slot allocated for transmission of system information in such a way that the interval between the front edge of the first time-slot and the front edge of the second time-slot is 8 time-slots.

6 . A method according to claim 1 , wherein generating comprises generating a test signal containing a 51-frame multi-frame, which has a plurality of time-slots allocated for transmission of system information, and positioning comprises positioning synchronization sequences supported by the mobile communication system in time-slots allocated for transmission of system information in such a way that the synchronization sequence is repeated at least 11 times in the 51-frame multi-frame.

7 . A method according to claim 1 , further comprising:

positioning a test sequence in the test signal;

receiving the test signal;

identifying the test sequence from the test signal;

generating a variable characterizing the receiver by means of the test sequence;

transmitting a signal containing the receiver-characterizing variable from the wireless messaging device; and

receiving the signal containing the receiver-characterizing variable from the wireless messaging device.

8 . A method according to claim 1 , wherein positioning comprises positioning a synchronization sequence supported by the mobile communication system in a time-slot allocated for transmission of system information, which synchronization sequence contains at least one of the following: the training sequence code of a synchronization channel according to the GSM standard; bits of a frequency correction channel according to the GSM standard.

9 . A method according to claim 1 , further comprising transmitting the test signal to the receiver via an antenna connection of the receiver.

10 . A method according to claim 1 , further comprising loading to the wireless messaging device a computer program which executes a computer process comprising:

receiving the test signal as input;

identifying the synchronization sequence from the test signal; and

synchronizing the receiver by means of the synchronization sequence.

11 . A method according to claim 1 , further comprising identifying the synchronization sequence from the test signal; and

synchronizing the receiver by means of the synchronization sequence.

12 . A system for testing a receiver of a wireless messaging device of a mobile communication system, comprising:

a test-signal generator for generating a test signal in a production stage of the wireless messaging device, which test signal contains physical time-slots, at least one of which time-slots is allocated for transmission of system information from a base transceiver station of the mobile communication system to the messaging device, the test-signal generator being configured to position a synchronization sequence supported by the mobile communication system in a time-slot allocated for the transmission of system information.

13 . A system according to claim 12 , further comprising:

conversion means connected to the test-signal generator for converting the test signal to radio frequency; and

transmission means connected to conversion means for transmitting the test signal to the receiver at the radio frequency.

14 . A system according to claim 13 , wherein the transmission means are connected to an antenna connector of the wireless messaging device.

15 . A system according to claim 12 , wherein the test-signal generator is configured to position one of the following in a time-slot allocated for transmission of system information: a time synchronization sequence supported by the mobile communication system, a frequency synchronization sequence supported by the mobile communication system.

16 . A system according to claim 12 , wherein the test-signal generator is configured to position a frequency synchronization sequence supported by the mobile communication system in the first time-slot allocated for transmission of system information, the test-signal generator being further configured to position a time synchronization sequence supported by the mobile communication system in the second time-slot allocated for transmission of system information in such a way that the interval between the front edge of the first time-slot and the front edge of the second time-slot is 8 time-slots.

17 . A system according to claim 12 , wherein the test-signal generator is configured to generate a test signal containing a 51-frame multi-frame, which has a plurality of time-slots allocated for transmission of system information, the test-signal generator is being further configured to position synchronization sequences supported by the mobile communication system in time-slots allocated for transmission of system information in such a way that the synchronization sequence is repeated at least 11 times in the 51-frame multi-frame.

18 . A system according to claim 12 , wherein the test-signal generator is configured to position in the test signal a test sequence, of which the receiver generates a variable characterizing the receiver.

19 . A system according to claim 12 , wherein the test-signal generator is configured to position a synchronization sequence supported by the mobile communication system in a time-slot allocated for transmission of system information, which synchronization sequence contains at least one of the following: the training sequence code of a synchronization channel according to the GSM standard; bits of a frequency correction channel according to the GSM standard.

20 . A system according to claim 12 , wherein the system further comprises a connection unit for receiving from the wireless messaging device a signal that contains a variable characterizing the receiver.

21 . A system according to claim 12 , further comprising a loading unit for loading a computer program to the wireless messaging device, which computer program executes a computer process comprising the steps of:

receiving the test signal as input;

identifying the synchronization sequence from the test signal; and

synchronizing the receiver by means of the synchronization sequence.

22 . A computer program for executing a computer process for testing a receiver of a wireless messaging device of a mobile communication system, the computer process comprising:

receiving, in a production stage of the wireless messaging device, as input a test signal containing physical time-slots, at least one of which is allocated for transmission of system information from a base transceiver station of the mobile communication system to the messaging device, a synchronization sequence supported by the mobile communication system being positioned in this time-slot;

identifying the synchronization sequence from the test signal; and

synchronizing the receiver by means of the synchronization sequence.

23 . A computer program according to claim 22 , wherein the computer process comprises:

receiving the test signal as input, a frequency synchronization sequence being positioned in at least one of its time-slots allocated for transmission of system information;

identifying the frequency synchronization sequence from the test signal; and

frequency-synchronizing the receiver by means of the frequency synchronization sequence.

24 . A computer program according to claim 22 , wherein the computer process comprises:

receiving the test signal as input, a time synchronization sequence being positioned in at least one of its time-slots allocated for transmission of system information;

identifying the time synchronization sequence from the test signal; and

time-synchronizing the receiver by means of the time-synchronization sequence.

25 . A computer program according to claim 22 , wherein the computer process comprises:

receiving as input a test signal which contains a 51-frame multi-frame with a plurality of time-slots allocated for transmission of system information, synchronization sequences supported by the mobile communication system being positioned in time-slots in such a way that repetition of the synchronization sequence in the 51-frame multi-frame is at least one of the following: 7 times, 11 times; and

synchronizing the receiver by means of the synchronization sequences.

26 . A computer program according to claim 22 , wherein the computer process comprises:

receiving as input the test signal that contains a test sequence;

identifying the test sequence from the test signal;

generating a variable characterizing the receiver by means of the test sequence; and

outputting the signal containing the receiver-characterizing variable to an external bus of the wireless messaging device.

27 . A computer program according to claim 22 , wherein the computer process comprises receiving as input the test signal that contains physical time-slots, at least one of which time-slots is allocated for transmission of system information from the base transceiver station to the messaging device, and in which time-slot a synchronization sequence supported by the mobile communication system is positioned, the synchronization sequence comprising at least one of the following: the training sequence code of a synchronization channel according to the GSM standard; bits of a frequency correction channel according to the GSM standard.