Method for testing the transmission modes of a radio device

Patent metadata

Field	Value
Publication number	US-9363035-B2
Application number	US-93443309-A
Country	US
Kind code	B2
Filing date	Mar 16, 2009
Priority date	Apr 15, 2008
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A method for determining a channel quality for the transmission of data in the channel by a test device. The test device transmits the data with the determined channel quality to a device to be tested which determines one or more pieces of decision information. The device to be tested forwards the piece(s) of decision information to the test device as a response signal and the test device reads the piece(s) of decision information from the response signal. The piece(s) of decision information from the response signal is/are uniquely attributed to a transmission mode to be adjusted. The initially determined channel quality is also uniquely attributed to an expected transmission mode. The expected transmission mode is compared with the transmission mode to be adjusted in a comparative unit in the evaluation unit, thereby allowing a statement regarding the correctness of the transmission mode to be adjusted.

First claim

The invention claimed is:

1. A method for testing a device for wireless communication, including the following steps:
establishing a channel quality of a transmission channel for transmitting data in this channel through a test device, wherein the established channel quality is particular to a transmission state out of plural transmission states and is particularly chosen to such a value that tests switching processes between transmission states, wherein the channel quality is adjusted by the test device such that it is located at or in a distance above or below a switching point U i between two transmission states, and wherein the distance is in the order of magnitude of the error of a corresponding channel quality determination of the device to be tested;
transmitting data from the test device to a device to be tested using the established channel quality;
evaluating the data transmitted using the established channel quality in the device to be tested for determining at least one item of decision information;
sending a response signal containing the at least one item of decision information back to the test device;
allocating the at least one item of decision information obtained from the response signal to a transmission state to be adjusted, wherein precisely one transmission state is unequivocally allocated to each total content of obtained items of decision information;
determining an expected transmission state corresponding to the established channel quality used for transmission; and
comparing the expected transmission state to the transmission state to be adjusted, wherein the transmission state to be adjusted is used for further transmission of data.

2. The method as claimed in claim 1 , wherein the at least one item of decision information received with the response signal comprises at least one item of information describing a transmission quality.

3. The method as claimed in claim 1 , wherein the channel quality is changed by the test device such that a change to a transmission state not allocated to a directly adjacent channel quality interval is effected.

4. The method as claimed in claim 1 , wherein the channel quality is successively changed by the test device such that starting from different channel quality intervals, the change to a selected channel quality interval is simulated.

5. The method as claimed in claim 1 , wherein a chronology of expected transmission states and transmission states to be adjusted is stored and evaluated.

6. The method as claimed in claim 5 , wherein an occurrence rate of switching between different transmission states to be adjusted is determined.

7. The method as claimed in claim 5 , wherein the temporal progression of switching between transmission states expected and/or adjusted is measured.

8. The method as claimed in claim 5 , wherein change of transmission states to be adjusted are evaluated in relation to their history of transmission state changes.

9. The method as claimed in claim 2 , wherein the channel quality is changed by the test device such that a change to a transmission state not allocated to a directly adjacent channel quality interval is effected.

10. The method as claimed in claim 2 , wherein the channel quality is successively changed by the test device such that starting from different channel quality intervals, the change to a selected channel quality interval is simulated.

11. The method as claimed in claim 2 , wherein a chronology of expected transmission states and transmission states to be adjusted is stored and evaluated.

12. The method as claimed in claim 11 , wherein the occurrence rate of the switching between different transmission states to be adjusted is determined.

13. The method as claimed in claim 11 , wherein the temporal progression of switching between transmission states expected and/or adjusted is measured.

14. The method as claimed in claim 11 , wherein change of transmission states to be adjusted are evaluated in relation to their history of transmission state change.

Assignees

• Pauly Andreas
• Mueller Martin
• Tietscher Gerald
• Gerlach Heino
• Fischer Volker
• Ballmann Stefan
• Rohde & Schwarz

Inventors

• Pauly Andreas
• Mueller Martin
• Tietscher Gerald
• Gerlach Heino
• Fischer Volker
• Ballmann Stefan

Classifications

• H04L1/24

  Testing correct operation · CPC title

• H04L1/0001 Primary

  Systems modifying transmission characteristics according to link quality, e.g. power backoff (adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04) · CPC title