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WO2014139600A1 - Dispositif de mesure et procédé de mesure pour détecter des erreurs dans des signaux - Google Patents

Dispositif de mesure et procédé de mesure pour détecter des erreurs dans des signaux Download PDF

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Publication number
WO2014139600A1
WO2014139600A1 PCT/EP2013/072982 EP2013072982W WO2014139600A1 WO 2014139600 A1 WO2014139600 A1 WO 2014139600A1 EP 2013072982 W EP2013072982 W EP 2013072982W WO 2014139600 A1 WO2014139600 A1 WO 2014139600A1
Authority
WO
WIPO (PCT)
Prior art keywords
errors
signal
coded
messages
displaying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2013/072982
Other languages
English (en)
Inventor
Adrian Schumacher
Rajashekar DURAI
Hardy Scheidig
Gerson BACOR
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rohde and Schwarz GmbH and Co KG
Original Assignee
Rohde and Schwarz GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rohde and Schwarz GmbH and Co KG filed Critical Rohde and Schwarz GmbH and Co KG
Publication of WO2014139600A1 publication Critical patent/WO2014139600A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0823—Errors, e.g. transmission errors
    • H04L43/0847—Transmission error
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/50—Testing arrangements

Definitions

  • the invention relates to a measuring device and a
  • measuring method for detecting errors, especially protocol errors, in signals of one or more devices under test is a measuring method for detecting errors, especially protocol errors, in signals of one or more devices under test.
  • the object of the invention is to provide a measuring device and a measuring method which are capable of accurately detecting errors within signals of devices under test without requiring intensive knowledge of the employed communication standard from the user of the measuring device or measuring method.
  • An inventive measuring device for detecting errors in a signal of at least a first device under test comprises reception means for receiving a first signal from the first device under test, error detection means for
  • the display control means are set up for displaying messages of at least the first signal in a time-domain diagram, showing messages as blocks each of a length corresponding to a duration of the message and a height corresponding to a signal power during the duration of the message, and for displaying detected errors in the time-domain diagram. It is therefore easily possible to determine the location of errors within the signal.
  • the reception means are furthermore advantageously set up for receiving a second signal of a second device under test.
  • the error detection means are then set up for detecting errors in the second signal.
  • the display control means are then set up for displaying simultaneously at least the second signal or information within the second signal and errors detected in the second signal using the display means. In this configuration, it is possible to detect where errors occur within a message flow between the two devices under test.
  • the display control means are set up for displaying messages of the first signal und messages of the second signal in a message sequence diagram, and for displaying errors detected within the message sequence diagram. This makes it even easier for the user to detect the origins of errors in the message sequence.
  • the errors detected by the error detection means are protocol errors and/or timing errors and/or frequency offset errors and/or message order errors and/or modulation scheme errors and/or coding scheme errors and/or bit errors. This enables the analysis of a great deal of different error types.
  • the errors are displayed symbolically and/or color coded and/or pattern coded and/or shading coded and/or brightness coded and/or size coded and/or as plaintext dependent upon an error type and/or as an error severity and/or as an error origin and/or as an error consequence. It is therefore very easy for a user to differentiate between different errors.
  • the measuring device advantageously comprises analog error detection means for detecting timing errors and/or
  • digital error detection means for detecting protocol errors and/or timing errors and/or message order errors and/or modulation scheme errors and/or coding scheme errors and/or bit errors.
  • These dedicated error detection means allow a very accurate error detection.
  • the display control means are set up for additionally displaying further information regarding all signals displayed.
  • the further information includes a bit error rate and/or a signal power and/or a time duration of individual messages within the respective signal and/or a time duration of bursts within the respective signal and/or time intervals between messages and/or whether messages within the respective signal are acknowledged.
  • the additional information is displayed symbolically and/or color coded and/or pattern coded and/or shading coded and/or brightness coded and/or size coded and/or as plaintext. This gives a user more valuable information regarding the signals in view.
  • An inventive measuring method serves the purpose of detecting errors in a signal of at least a first device under test.
  • the measuring method comprises receiving a first signal from the first device under test, detecting errors in the first signal and displaying simultaneously at least the first signal or information within the first signal and errors detected in the first signal. Extensive knowledge of the received signal is therefore not
  • FIG. 1 shows an embodiment of the inventive measuring device
  • Fig. 2 shows a first detail of the embodiment of the inventive measuring device
  • Fig. 3 shows a second detail of the embodiment of the inventive measuring device
  • Fig. 4 shows a first exemplary diagram to be displayed by the embodiment of the inventive measuring device ;
  • Fig. 5 shows a second exemplary diagram to be displayed by the embodiment of the inventive measuring device, and
  • Fig. 6 shows an embodiment of the inventive measuring method .
  • the measuring device 1 comprises reception means 20, which comprise for example an antenna and a preamplifier. Moreover, the measuring device 1 comprises analog processing means 21 connected to the reception means 20. The analog processing means 21 are connection to an analog-digital-converter 22, which in turn is connected to digital processing means 23. The digital processing means 23 are connected to display means 24. The analog processing means 21, the digital processing means 23 and the display means 24 are each connected to control means 25. Moreover, the analog processing means 21 are connected to the digital processing means 23.
  • the control means 25 control the function of the analog processing means 21, the digital processing means 23 and the display means 24.
  • the control means can additionally be connected to the reception means 20 and then control for example the function of the preamplifier.
  • the inventive measuring device 1 receives signals of a first device under test 2 and a second device under test 3. These signals though are not intended for the measuring device 1, but for the respective other device under test 2, 3. Therefore, the measuring device 1 listens in on the communication between the first device under test 2 and the second device under test 3. Also a communication between more than two devices under test can be monitored. Alternatively, also a communication of only a single device under test can be monitored.
  • the signals of the devices under test 2, 3 are received by the reception means 20.
  • the reception means 20 pre- processes the received signals and hands them on to the analog processing means 21.
  • the analog processing means 21 perform for example a frequency conversion into the baseband and/or a frequency offset compensation, etc.. Relevant for the present invention is that the analog processing means 21 furthermore detect errors of the signals and pass the detected errors on to the digital processing means 23.
  • the errors detectable by the analog processing means 21 are for example frequency offset errors and/or timing errors.
  • the errors detected by the analog processing means 21 are, however, not limited to this list.
  • the signal is passed on to the analog-digital-converter 22 from the analog processing means 21. It is digitized by the analog-digital-converter 22 and passed on to the digital processing means 23.
  • the digital processing means 23 furthermore perform digital processing on the digital signal. For example, a demodulation and a decoding is performed. Relevant for the present invention though is that the digital processing means 23 furthermore detect additional errors within the signal.
  • the digital processing means 23 pass on the information regarding the errors detected to the display means 24, which displays the errors alongside with the signals received from the devices under test 2, 3.
  • FIG. 2 a detail of the embodiment of the inventive measuring device of Fig. 1 is shown.
  • Fig. 2 merely shows the inner workings of the analog processing means 21. Only aspects of the analog processing means 21 relevant to the present invention are displayed. Therefore, the regular signal path of the received signal through the analog processing means is not shown in detail here.
  • the analog processing means 21 comprise processing means 29, which the signal is provided to by the reception means 20 of Fig. 1.
  • the processing means 29 perform the analog processing. The inner workings of these processing means
  • the signal of the reception means 20 of Fig. 1 is provided to the analog error detection means 30 along with signals from several points along the signal flow through the processing means 29.
  • the analog processing means 21 moreover comprise analog error detection means 30 and an analog signal database 31.
  • the signal received by the reception means 20 and signal at different points through the analog processing of the signal within the processing means 29 is passed on to the analog error detection means 30.
  • the analog error is passed on to the analog error detection means 30.
  • the analog error detection means 30 are furthermore connected to the control means 25 of Fig. 1. The function of the analog error detection means are controlled by the control means 25 of Fig. 1. The analog error detection means 30 detect errors within the signals passed on to the analog error detection means 30. In order to detect these errors, the analog error detection means 30 uses data regarding the communication scheme employed from the analog signal database 31.
  • the signal resulting from the processing means 29 is passed on to the analog-digital-converter of Fig. 1.
  • the errors detected by the analog error detection means 30 are passed on to the digital processing means 23.
  • FIG. 3 a second detail of the embodiment of the inventive measuring device 1 of Fig. 1 is shown.
  • Fig. 3 the inner processing of the digital processing means 23 are shown.
  • the digital processing means 23 of Fig. 1 comprise
  • processing means 39 for performing the regular digital processing.
  • the processing means 39 perform a demodulation and a decoding of the signal provided by the analog-digital-converter 22 of Fig. 1. Resulting signals are passed on to the display means 24 of Fig. 1. Moreover, signals of several points within the data flow through the processing means 39 are passed on to digital error
  • the digital error detection means 40 are furthermore supplied with the signal from the analog- digital-converter 22 of Fig. 1.
  • the digital error is furthermore supplied with the signal from the analog- digital-converter 22 of Fig. 1.
  • the digital error detection means 40 then detect errors within the signal. For example, protocol errors and/or timing errors and/or message order errors and/or modulation scheme errors and/or coding scheme errors and/or bit errors are detected by the digital error detection means 40. In order to perform its function, the digital error detection means uses information regarding the employed communication scheme stored within a digital signal database 41 also present within the digital processing means 23.
  • the digital processing means 23 comprise display control means 42 for controlling the display of the signals and of the errors within the signals.
  • the display control means 42 receive the errors detected by the analog error detection means 30 of Fig. 2.
  • the errors detected by the digital error detection means 40 are passed on to the display control means 42.
  • the display control means 42 is furthermore connected to the control means 25 of Fig. 1 and controlled therefrom.
  • the display control means 42 control the display of the errors and the according signals in such a manner, that the errors are displayed symbolically and/or color coded and/or pattern coded and/or shading coded and/or
  • Fig. 4 a first exemplary display diagram depicted by the embodiment of the inventive measuring device of Fig. 1 is shown.
  • the diagram shown here is a message sequence diagram showing messages 50-56 between a first device under test and a second device under test.
  • a first message 50 is transmitted from the second device under test to the first device under test. This message is not highlighted in any way. This signifies that this message does not comprise any error.
  • a second message 51 is transmitted from the first device under test to the second device under test. Also the second message is not highlighted and therefore comprises no error.
  • a third message 52 is afterwards transmitted from the second device under test to the first device under test. This message is depicted slightly shaded, indicating that the message is erroneous. In this example, the message comprises a syntax error.
  • the ensuing three messages 53-55 again are displayed without any detected errors. Between messages 55 and 56, a symbol 57 indicating a timing error though is displayed. The symbol 57 shows that the acknowledge message 56 has arrived later than specified by the protocol employed as a response to the message 55.
  • FIG. 5 a second exemplary display content of the embodiment of the inventive measuring device of Fig. 1 is shown.
  • a time-domain diagram 69 is shown.
  • the messages are depicted in their order of occurrence.
  • the messages 60-66 are displayed from left to right in their succession through time.
  • the corresponding to the messages 60-66 in this example indicates the reception power of the individual message.
  • This reception power for example is detected by the analog error detection means 30 within the analog processing means 21 of Fig. 1.
  • the message 61 has a very low height indicating a too low reception power of the message.
  • the message 62 is depicted in a shaded manner indicating in this example that a signal-to- noise-ratio of the message 62 is too low.
  • a measurement is performed. Resulting signals are recorded.
  • errors of the different signals are detected. Regarding the error detection, it is referred to Fig. 2 and Fig. 3.
  • a third step 102 the detected errors and the according signals are displayed simultaneously. Regarding the display of errors, it is referred to Fig. 4 and Fig. 5.
  • the invention is limited to the examples shown.
  • the invention can be applied to signals of any communication standard. Moreover, any number of devices under test can be used. The characteristics of the communication standard.
  • exemplary embodiments can be used in any advantageous combination .

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

L'invention concerne un dispositif de mesure (1) pour détecter des erreurs dans un signal d'au moins un premier dispositif soumis à un test, lequel dispositif de mesure comprend un moyen de réception (20) pour recevoir un signal à partir du premier dispositif soumis à un test, un moyen de détection d'erreur pour détecter des erreurs dans le premier signal, un moyen d'affichage (24) et un moyen de commande d'affichage pour afficher simultanément le signal ou des informations dans le signal et des erreurs détectées dans le signal à l'aide du moyen d'affichage (24).
PCT/EP2013/072982 2013-03-15 2013-11-05 Dispositif de mesure et procédé de mesure pour détecter des erreurs dans des signaux Ceased WO2014139600A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SG201301910-4 2013-03-15
SG2013019104A SG2013019104A (en) 2013-03-15 2013-03-15 Measuring device and measuring method for detecting errors in signals

Publications (1)

Publication Number Publication Date
WO2014139600A1 true WO2014139600A1 (fr) 2014-09-18

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PCT/EP2013/072982 Ceased WO2014139600A1 (fr) 2013-03-15 2013-11-05 Dispositif de mesure et procédé de mesure pour détecter des erreurs dans des signaux

Country Status (2)

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SG (1) SG2013019104A (fr)
WO (1) WO2014139600A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005081728A2 (fr) * 2004-02-09 2005-09-09 Lecroy Corporation Analyse simultanee de couche physique et de couche protocole
US20060009159A1 (en) * 2004-07-09 2006-01-12 Leung Hung F Protocol layer analysis in mobile device testing
WO2008028144A2 (fr) * 2006-09-01 2008-03-06 Power Monitors, Inc. Procédé et appareil pour modules plc remplaçables
US20080294948A1 (en) * 2006-11-06 2008-11-27 Tektronix International Sales Gmbh Protocol Tester and Method for Performing a Protocol Test

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005081728A2 (fr) * 2004-02-09 2005-09-09 Lecroy Corporation Analyse simultanee de couche physique et de couche protocole
US20060009159A1 (en) * 2004-07-09 2006-01-12 Leung Hung F Protocol layer analysis in mobile device testing
WO2008028144A2 (fr) * 2006-09-01 2008-03-06 Power Monitors, Inc. Procédé et appareil pour modules plc remplaçables
US20080294948A1 (en) * 2006-11-06 2008-11-27 Tektronix International Sales Gmbh Protocol Tester and Method for Performing a Protocol Test

Also Published As

Publication number Publication date
SG2013019104A (en) 2014-10-30

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