Method of determining an error rate and a suitable testing device

Patent metadata

Field	Value
Publication number	US-9246643-B2
Application number	US-90859406-A
Country	US
Kind code	B2
Filing date	Mar 15, 2006
Priority date	Mar 21, 2005
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

The invention relates to a method and to a test device ( 12 ) which is used to determine an error rate during the transfer of data ( 1 ) in a mobile radio system. Said mobile radio system comprises at least one transfer channel, wherein several data partial flows ( 2.1, 2.2, 2.6 ) are transferred. The several data partial flows ( 2.1, 2.2 . . . 2.6 ) are produced in a signal generator unit ( 8 ). A transport format is determined, in an individual manner, for each data partial flow ( 2.1, 2.2 . . . 2.6 ). The data partial flows ( 2.1, 2.2 . . . 2.6 ) are sent, respectively, to a number of transfer blocks which belong together ( 5.1, . . . 7.1 ). A device which is to be tested captures the transfer blocks ( 5.1, . . . 7.1 ) of the data partial flows ( 2.1, 2.2 . . . 2.6 ) and evaluates them. According to the accuracy of the evaluation, a positive or negative actuation signal (ACK, NACK) is sent back by the device which is to be tested. An error rate of each data partial flow ( 2.1, 2.2 . . . 2.6 ) is determined by the test device ( 12 ) from the actuation signals (ACK, NACK) which are captured by the test device ( 12 ).

First claim

The invention claimed is:

1. A method of determining an error rate in a data transfer in a mobile radio system having at least one transfer channel in which a plurality of data subflows is transmitted, comprising the following method steps:
generating the plurality of data subflows by a signal generator unit,
specifying transport formats individually for each data subflow,
transmitting the data subflows in a number of associated transfer blocks in each case to a device to be tested by a testing device,
receiving and evaluating the transfer blocks by the device to be tested and sending back a positive or negative confirmation signal for every transfer block,
determining an individual error rate for every one of the plurality of data subflows from the received confirmation signals of transfer blocks associated with all the data subflows by the testing device,
wherein the method comprises the testing device individually specifying for every data subflow a sequence of redundancy versions for the transfer blocks to be repeatedly transferred, and
the testing device individually specifying the redundancy version sequence for a data subflow independently of positive or negative confirmation signals sent back to the transfer blocks of said data subflow.

2. Method according to claim 1 , comprising using different modulation methods for transmitting different data subflows.

3. Method according to claim 1 , comprising the testing device individually specifying for every data subflow a maximum number of transfer repetitions of those transfer blocks for whose first transmission a negative confirmation signal is sent back.

4. Method according to claim 3 , comprising specifying the maximum number of transfer repetitions for a data subflow in each case independently of positive or negative confirmation signals sent back to the transfer blocks of said data subflow.

5. Method according to claim 1 , comprising the testing device adding a mismatching CRC checksum to the data transmitted in a transfer block to enforce at least one negative confirmation signal.

6. Method according to claim 1 , comprising the testing device simultaneously determining the block and bit error rates on a reference measuring channel.

7. Testing device for determining an error rate during the transfer of data in a mobile radio system, wherein the testing device comprises:
a signal generator unit configured to generate a plurality of data subflows,
a configuration block configured to specify transport formats individually for every data subflow,
a transceiver configured to transmit the data subflows in a number of associated transfer blocks in each case and for receiving a positive or negative confirmation signal, and
an evaluating unit configured to determine an error rate for every one of the plurality of data subflows from the received confirmation signals of transfer blocks associated with all the data subflows,
wherein the configuration block is further configured to specify a redundancy version for transfer blocks to be repeatedly transmitted in the data subflows, and configured to individually specify for every data subflow a sequence of redundancy versions for the transfer blocks to be repeatedly transferred,
wherein the configuration block is configured to specify the redundancy version sequence of a data subflow in each case independently of positive or negative confirmation signals sent back to the transfer blocks of said data subflow.

8. Testing device according to claim 7 , wherein the evaluating unit comprises a plurality of evaluating blocks configured to determine an error rate for one data subflow in each case.

9. Testing device according to claim 7 , wherein the signal generator unit comprises a plurality of signal generators configured to generate transmission signals for data subflows with identical or different transport formats for the individual data subflows.

10. Testing device according to claim 7 , wherein the configuration block can specify a maximum number of transfer repetitions of individual transfer blocks of a data subflow after a negative confirmation signal.

11. Testing device according to claim 7 , wherein the configuration block can specify the maximum number for a data subflow in each case independently of positive or negative confirmation signals sent back to the transfer blocks of said data subflow.

12. Testing device according to claim 7 , wherein a block and bit error rate can be determined by the transfer and the reception of a reference measuring channel.

Assignees

• Braun Thomas
• Baeder Uwe
• Seebacher Pirmin
• Rohde & Schwarz

Inventors

• Braun Thomas
• Baeder Uwe
• Seebacher Pirmin

Classifications

• H04L1/24

  Testing correct operation · CPC title

• H04L1/0003

  by switching between different modulation schemes · CPC title

• H04L1/0083

  Formatting with frames or packets; Protocol or part of protocol for error control · CPC title

• H04L1/1671

  the supervisory signal being transmitted together with control information · CPC title

• H04L1/20 Primary

  using signal quality detector · CPC title