Method and system for testing the functioning of data communication in a radio apparatus

A method for testing the functioning of downlink data communication in a cellular radio system, comprising the steps of:

• sending a test signal from a base station to at least one mobile station,
• receiving the test signal sent by the base station at a mobile station,
• generating a pseudorandom bit sequence at the mobile station in order to produce a known form of the test signal,
• comparing the test signal received at the mobile station to the known form of the test signal,
• producing and temporarily storing at the mobile station information about errors which were detected in the received test signal during the comparing step,
• sending information representing the stored information about errors from the mobile station to a base station,
• receiving the information sent by the mobile station at a base station, and
• storing the information received by the base station in the cellular radio system.

A mobile station of a cellular radio system, comprising:

• reception means for receiving a signal in the downlink direction,
• transmission means for sending a signal in the uplink direction,
• comparison means for comparing a received test signal to a known form of the test signal,
• generating means for generating a pseudorandom bit sequence in order to produce the known form of the test signal,
• means for producing and temporarily storing information about errors which were detected in the received test signal by said comparison means, and
• uplink sending means for sending in the uplink direction a signal representing the stored information about errors.

A method for using a mobile station for testing the functioning of downlink data communication in a cellular radio system, comprising the steps of:

• receiving a test signal in the downlink direction at the mobile station;
• generating a pseudorandom bit sequence at the mobile station in order to produce a known form of the test signal;
• comparing the received test signal to the known form of the test signal;
• producing and temporarily storing information about errors which were detected in the received test signal during the comparing step;
• and
• sending in the uplink direction a signal representing the stored information about errors.

A method for testing the functioning of downlink data communication in a mobile station equipped for receiving a signal in the downlink direction and for sending a signal in the uplink direction, the method comprising the steps of:

• receiving a test signal in the downlink direction;
• comparing the received test signal to a known form of the test signal;
• producing and temporarily storing information about errors which were detected in the received test signal during the comparing step;
• and
• sending in the uplink direction a signal representing the stored information about errors;
• wherein in a mobile station equipped for converting a downlink signal to baseband and for demodulating, decrypting and channel decoding the signal converted to baseband, the step of comparing the received test signal to a known form of the test signal is performed after demodulation and decryption but prior to channel decoding.

A method for testing the functioning of downlink data communication in a mobile station equipped for receiving a signal in the downlink direction and for sending a signal in the uplink direction, the method comprising the steps of:

• receiving a test signal in the downlink direction;
• comparing the received test signal to a known form of the test signal;
• producing and temporarily storing information about errors which were detected in the received test signal during the comparing step;
• and
• sending in the uplink direction a signal representing the stored information about errors;
• wherein in a mobile station equipped for converting a downlink signal to baseband and for demodulating, decrypting and channel decoding the signal converted to baseband, the step of comparing the received test signal to a known form of the test signal is performed after demodulatin, decryption and channel decoding.

A mobile station of a cellular radio system, comprising:

• reception means for receiving a signal in the downlink direction;
• transmission means for sending a signal in the uplink direction;
• comparison means for comparing a received test signal to a known form of the test signal;
• means for producing and temporarily storing information about errors which were detected in the received test signal by said comparison means;
• and
• uplink sending means for sending in the uplink direction a signal representing the stored information about errors;
• downconversion means for converting received downlink data to baseband;
• a demodulator for demodulating the data converted to baseband;
• decrypting means for decrypting the demodulated data;
• a channel decoder for channel decoding the demodulated and decrypted data;
• a channel encoder for channel encoding uplink data;
• encrypting means for encrypting the channel encoded uplink data;
• a modulator for modulating the encrypted channel encoded uplink data onto baseband oscillations;
• and
• upconversion means for converting the modulated baseband oscillations onto a transmission frequency for transmitting;
• wherein said comparison means, said means for producing and temporarily storing information about errors and said uplink sending means are arranged to establish a coupling from the output of the decrypting means to the input of the encrypting means.

A mobile station of a cellular radio system, comprising:

• reception means for receiving a signal in the downlink direction;
• transmission means for sending a signal in the uplink direction;
• comparison means for comparing a received test signal to a known form of the test signal;
• means for producing and temporarily storing information about errors which were detected in the received test signal by said comparison means;
• and
• uplink sending means for sending in the uplink direction a signal representing the stored information about errors;
• downconversion means for converting received downlink data to baseband;
• a demodulator for demodulating the data converted to baseband;
• decrypting means for decrypting the demodulated data;
• a channel decoder for channel decoding the demodulated and decrypted data;
• a channel encoder for channel encoding uplink data;
• encrypting means for encrypting the channel encoded uplink data;
• a modulator for modulating the encrypted channel encoded uplink data onto baseband oscillators;
• and
• upconversion means for converting the modulated baseband oscillators onto a transmission frequency for transmitting;
• wherein said comparison means, said means for producing and temporarily storing information about errors and said uplink sending means are arranged to establish a coupling from the output of the channel decoder to the input of the channel encoder.