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  UMTS/HSPA Module Series 

                                                                                        WCDMA  Jamming  Detection  Application  Note

 

 

WCDMA_Jamming_Detection_Application_Note                    Confidential / Released                  5 / 13 

 
 

 

2

 

Jamming  Detection  Overview   

       
Quectel‟s Jamming Detection allows the user to identify active jamming of the GSM/WCDMA network. 
Many alarm, security and life critical operations rely on the use of GSM/WCDMA mobile communications. 

Criminals and those that intent on preventing time critical messages may use GSM/WCDMA jammers to 

interfere with normal network operation. Quectel

‟s Jamming Detection can allow Quectel module to detect 

jamming signals. When jamming is detected, Quectel module sends a notification to MCU, reporting the 

presence of active jamming of the GSM mobile communication network.   

 

 

Figure 1

：

Jamming Application Diagram 

 

2.1. Application Overview 

 

Quectel  Jamming  Detection  supports  to  report  the  appearance  and  disappearance  of  jamming 

automatically via URC to notify the MCU. Also you can manually query the jamming status by the 

QJDR

 

read command when 

AT+QJDR=1 

was set before (see Chapter 3.2). The following sections describe how 

to use these functionalities.   

 

 

Quectel 

Confidential 

Содержание WCDMA

Страница 1: ...WCDMA Jamming Detection Application Note UMTS HSPA Module Series Rev WCDMA_Jamming_Detection_Application_Note_V1 0 Date 2014 11 04 www quectel com ...

Страница 2: ...ORMATION PROVIDED IS BASED UPON CUSTOMERS REQUIREMENTS QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION ALL INFORMATION SUPPLIED HEREIN IS SUBJECT TO CHANGE WIT...

Страница 3: ... WCDMA Jamming Detection Application Note WCDMA_Jamming_Detection_Application_Note Confidential Released 2 13 About the Document History Revision Date Author Description 1 0 2014 11 04 Jacky ZHANG Initial Quectel Confidential ...

Страница 4: ... 6 2 1 2 Report Jamming Status via URC Periodically 6 2 2 Configure Optimized Detection Parameters 6 3 AT Commands Description 7 3 1 AT QJDCFG Jamming Detection Configuration 7 3 2 AT QJDR Jamming Detection Report 8 3 3 URC Description 9 3 3 1 Disturbed Indicator 9 3 3 2 Jammer Removal Indicator 9 4 Example 10 4 1 Report Jamming via URC 10 4 2 Report Jamming via URC Periodically 10 4 3 Enable and ...

Страница 5: ... allows the unit to sense attempts to disrupt the GSM WCDMA communication by interference with the signal Quectel module s sophisticated jamming detection enables enhanced security features and immediate alarm notification if communication interference is detected This document gives a detailed explanation on how to use the Jamming Detection function of Quectel standard modules 1 1 Scope of Docume...

Страница 6: ...terfere with normal network operation Quectel s Jamming Detection can allow Quectel module to detect jamming signals When jamming is detected Quectel module sends a notification to MCU reporting the presence of active jamming of the GSM mobile communication network Figure 1 Jamming Application Diagram 2 1 Application Overview Quectel Jamming Detection supports to report the appearance and disappea...

Страница 7: ... Chapter 4 1 2 1 2 Report Jamming Status via URC Periodically There are two ways to report URC for indicating jamming status One is reporting URC only once as described in section 2 1 1 the other is reporting URCs periodically Firstly enable the Jamming Detection function of Quectel module by AT QJDR 1 and AT QJDCFG URC 1 and then set the period by AT QJDCFG If jamming is detected the module will ...

Страница 8: ...n feature These options include the Jamming Detection conditions the Jamming notification methods etc Parameters will be automatically saved into NVRAM after being configured successfully AT QJDCFG Jamming Detection Configuration Test Command AT QJDCFG Response QJDCFG urc 0 1 QJDCFG period 0 120 QJDCFG mnl 0 31 QJDCFG minch 0 254 QJDCFG maxrscp 85 60 QJDCFG maxecio 20 70 QJDCFG minsqual 30 10 QJDC...

Страница 9: ...set to 0 no periodic reporting Default value 0 Range 0 120 unit s mnl The maximum jamming signal strength threshold For GSM network only Default value 17 Range 0 31 minch The minimum channel number which is jammed For GSM network only Default value 5 Range 0 254 minch The minimum channel number which is jammed For GSM network only Default value 5 Range 0 254 maxrscp The maximum RSCP threshold For ...

Страница 10: ...al port Read Command AT QJDR Response If mode was set to 1 which means enable the jamming detection function return QJDR NOJAMMING or QJDR JAMMED OK If mode was set to 0 which means disable the jamming detection function return QJDR 0 OK Write Command AT QJDR mode Response OK ERROR mode Disable or enable the jamming detection function 0 Jamming Detection function is disabled default is 0 1 Jamming...

Страница 11: ... please refer to Chapter 2 2 QJDR JAMMED The URC will be reported automatically Jamming has been detected AT QJDR Query the current jamming status QJDR JAMMED In a jamming environment jamming is detected OK If jammer is removed QJDR NO JAMMING The URC is reported automatically No jamming is detected AT QJDR Query the current jamming status QJDR NOJAMMING No jamming is detected OK 4 2 Report Jammin...

Страница 12: ...ING The URC is reported automatically No jamming is detected AT QJDCFG period 0 Disable reporting URC periodically OK 4 3 Enable and Disable Jamming Detection AT QJDR Test mode QJDR 0 1 OK AT QJDR Query the current jamming status QJDR NOJAMMING No jamming detected OK AT QJDR 1 Enable Jamming Detection function OK Turn on jammer QJDR JAMMED The jammer has been detected and then jamming is reported ...

Страница 13: ... of the period is 0 It represents that reporting jamming status via URC periodically is disabled QJDCFG mnl 17 QJDCFG minch 5 QJDCFG maxrscp 80 QJDCFG maxecio 40 QJDCFG minsqual 5 QJDCFG maxsrxlev 30 QJDCFG pscanfinelev 100 OK AT QJDCFG URC 1 Enable URC output OK AT QJDCFG period 5 Set period is 5 It represents that jamming status is reported via URC through serial port every 5 seconds OK AT QJDCF...

Страница 14: ...ication_Note Confidential Released 13 13 5 Appendix A Reference Table 1 Terms and Abbreviations Abbreviation Description BSIC Base Station Identity Code RSSI Received Signal Strength Indication URC Unsolicited Result Code MNL Maximum Noise Level MINCH Minimum Channel Number Quectel Confidential ...

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