Nokia Mobile Phones Limited

Tampella Ab

Jukka Kinnunen

Jussi Olavi Numminen

Markku Lintinen

Pekka Jokitalo

Juha Savolainen

Esa Nokkonen

Jarmo Lehtonen

The invention pertains in general to the testing of the operation of radio and other data transmission apparatus. In particular the invention pertains to the testing of the operation of a digital radio apparatus on the basis of error statistics. In order to test functions relating to data transmission, a simulation system produces a pseudorandom bit sequence or some other test sequence which is packed into downlink frames and sent to the data transmission apparatus tested. In accordance with the invention, a known number of errors are generated in the test sequence. As the data transmission apparatus tested compares the received test sequence to the sequence it has produced, it detects the errors in the received sequence and compiles various error statistics, e.g., in the form of bit error ratio (BER) or frame erasure ratio (FER). An uplink connection is used to send these statistical data to the simulation system which examines whether the information produced by the data transmission apparatus tested matches the simulation system's information about the erroneousness of the sequence sent downlink.

Method and system for testing the functioning of a testing algorithm in a data transmission apparatus

The invention concerns a method and associated hardware units for testing the functioning of downlink data communication in a mobile station (). The mobile station is equipped for receiving () a signal in the downlink direction and for sending () a signal in the uplink direction. As a part of the method, a test signal () is received in the downlink direction. The received test signal is compared () to a known form of the test signal. There is produced and temporarily stored () information about errors which were detected in the received test signal during the comparing step. In the uplink direction a signal is sent () representing the stored information about errors.

Method and apparatus for measuring and optimising the quality of data transmission

To test the functioning of downlink data communication a mobile station comprises means ( ) for receiving a signal in the downlink direction and means ( ) for sending a signal uplink. It receives a test signal in the downlink direction ( ) and compares the received test signal to a known form of the test signal ( ). In addition, the mobile station stores information produced by the comparison about errors detected in the received test signal ( ) and sends uplink a signal representing the information stored ( ).

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

A press with extended press zone in a paper machine comprising a rotating press roll (1), a press shoe (2), and a slide band (7) sliding along the surface of the press shoe, a web (6) being passed between felts (4, 5) through the press, where it is pressed between the roll (1) and the slide band (7). The press shoe (2), designed to operate hydrodynamically, has a surface provided with a pocket area (d) formed by one or more pockets of small average thickness. If required, pressurized lubricant can be introduced to the pocket area to achieve the desired press effect and speed.

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Tampere, Finland

Jukka Kinnunen