Quectel WCDMA Istruzioni per l'installazione e il funzionamento

WCDMA Jamming Detection

Application Note

UMTS/HSPA Module Series

Rev. WCDMA_Jamming_Detection_Application_Note_V1.0

Date: 2014-11-04

www.quectel.com

UMTS/HSPA Module Series

WCDMA Jamming Detection Application Note

WCDMA_Jamming_Detection_Application_Note Confidential / Released 1 / 13

Our aim is to provide customers with timely and comprehensive service. For any

assistance, please contact our company headquarters:

Quectel Wireless Solutions Co., Ltd.

Office 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233

Tel: +86 21 5108 6236

Mail: info@quectel.com

Or our local office, for more information, please visit:

http://www.quectel.com/support/salesupport.aspx

For technical support, to report documentation errors, please visit:

http://www.quectel.com/support/techsupport.aspx

GENERAL NOTES

QUECTEL OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION

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 WITHOUT PRIOR NOTICE.

THIS INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF

QUECTEL CO., LTD. TRANSMITTABLE, REPRODUCTION, DISSEMINATION AND EDITING OF THIS

DOCUMENT AS WELL AS UTILIZATION OF THIS CONTENTS ARE FORBIDDEN WITHOUT

PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES. ALL RIGHTS

ARE RESERVED IN THE EVENT OF A PATENT GRANT OR REGISTRATION OF A UTILITY MODEL

OR DESIGN.

Quectel

Confidential

UMTS/HSPA Module Series

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

UMTS/HSPA Module Series

WCDMA Jamming Detection Application Note

WCDMA_Jamming_Detection_Application_Note Confidential / Released 3 / 13

Contents

About the Document...................................................................................................................................2

Contents.......................................................................................................................................................3

1Introduction..........................................................................................................................................4

1.1. Scope of Document .....................................................................................................................4

2Jamming Detection Overview.............................................................................................................5

2.1. Application Overview ...................................................................................................................5

2.1.1. Report Jamming Status via URC.....................................................................................6

2.1.2. Report Jamming Status via URC Periodically..................................................................6

2.2. Configure Optimized Detection Parameters................................................................................6

3AT 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

4Example ..............................................................................................................................................10

4.1. Report Jamming via URC..........................................................................................................10

4.2. Report Jamming via URC Periodically.......................................................................................10

4.3. Enable and Disable Jamming Detection....................................................................................11

4.4. Configure Jamming Detection ...................................................................................................11

5Appendix A Reference.......................................................................................................................13

Quectel

Confidential

UMTS/HSPA Module Series

WCDMA Jamming Detection Application Note

WCDMA_Jamming_Detection_Application_Note Confidential / Released 4 / 13

1Introduction

ACellular Communication Jammer can totally paralyze all kinds of mobile and portable phones working in

the GSM/WCDMA bands. Quectel standard modules offer jamming detection functionality which 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 Document

Quectel Jamming Detection function is applicable to the following modules:

UC20 UMTS/HSPA+ series

UC15 UMTS/HSDPA series

Quectel

Confidential

UMTS/HSPA Module Series

WCDMA Jamming Detection Application Note

WCDMA_Jamming_Detection_Application_Note Confidential / Released 5 / 13

2Jamming 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

UMTS/HSPA Module Series

WCDMA Jamming Detection Application Note

WCDMA_Jamming_Detection_Application_Note Confidential / Released 6 / 13

2.1.1. Report Jamming Status via URC

After Jamming Detection function is enabled by AT+QJDR=1, and URC output is enabled by command

AT+QJDCFG=“URC”,1. The Jamming Detection function can work well with the default settings. If

jamming is detected, the module will report “+QJDR: JAMMED” through URC port. If jamming is removed,

the module will report “+QJDR: NOJAMMING” through URC port. If URC of this function is not reported,

query whether the jamming status is available or not by “AT+QJDR?”. For detailed details, please refer to

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 report a URC “+QJDR: JAMMED”through URC

port every <period> seconds. If jamming is removed, the module will report “+QJDR: NOJAMMING”

through URC port. For more details, please refer to Chapter 4.2.

2.2. Configure Optimized Detection Parameters

Quectel Jamming Detection supports to optimize the detection conditions by configuring <mnl> and other

parameters of AT+QJDCFG. To detect and report the jamming, some basic conditions are verified.

Quectel

Confidential

UMTS/HSPA Module Series

WCDMA Jamming Detection Application Note

WCDMA_Jamming_Detection_Application_Note Confidential / Released 7 / 13

3AT Commands Description

Quectel Jamming Detection can be configured by AT+QJDCFG command and activated by AT+QJDR

command. If a Cellular Communication Jammer is active in its range, the module can detect and give

indication to you via URC.

3.1. AT+QJDCFG Jamming Detection Configuration

This command allows module to configure the options of Jamming Detection 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)

+QJDCFG: "maxsrxlev",(25-60)

+QJDCFG: "pscanfinelev",(-500~800)

Read Command

AT+QJDCFG?

Response

+QJDCFG: "urc",<value>

+QJDCFG: "period",<value>

+QJDCFG: "mnl",<value>

+QJDCFG: "minch",<value>

+QJDCFG: "maxrscp",<value>

+QJDCFG: "maxecio",<value>

+QJDCFG: "minsqual",<value>

+QJDCFG: "maxsrxlev",<value>

+QJDCFG: "pscanfinelev",<value>

Quectel

Confidential

UMTS/HSPA Module Series

WCDMA Jamming Detection Application Note

WCDMA_Jamming_Detection_Application_Note Confidential / Released 8 / 13

Parameters

3.2. AT+QJDR Jamming Detection Report

Jamming Detection can be activated by QJDR command. Parameters will be automatically saved into

NVRAM after being configured successfully.

Write Command

AT+QJDCFG=<type>,<value>

Response

ERROR

<type> String type, define the name of settings type

<value> Digital type, define the value of type

“urc” URC defines the type of jamming detection report. When set to „1‟, the

detection report will be pushed to the URC port. When set to „0‟, the

detection report will not be pushed to the URC port. Default value: 0.

Range: 0,1

“period” Period of URC of auto jamming detection report. When 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 WCDMAnetwork only). Default value:

-80. Range: -85~-60

"maxecio" The maximum ECIO threshold (For WCDMA network only). Default value:

40. Range: 20-70

"minsqual" The minimum S_QUAL threshold (For WCDMA network only). Default

value: -5. Range: -30~10

"maxsrxlev" The maximum S_RXLEV threshold (For WCDMA network only). Default

value: 30. Range: 25-60

"pscanfinelev" Considered very good signal power threshold while power scanning (For

WCDMA network only). Default value: 100. Range: -500~800

AT+QJDR Jamming Detection Report

Test Command

AT+QJDR=?

Response

+QJDR: (0,1)

Quectel

Confidential

UMTS/HSPA Module Series

WCDMA Jamming Detection Application Note

WCDMA_Jamming_Detection_Application_Note Confidential / Released 9 / 13

Parameters

3.3. URC Description

3.3.1. Disturbed Indicator

If the module detects a Jammer, it will send the URC “+QJDR: JAMMED”to the serial port.

3.3.2. Jammer Removal Indicator

If the Jammer was removed then it will send the message "+QJDR: NOJAMMING" to the serial port.

Read Command

AT+QJDR?

Response

If <mode> was set to “1” which means enable the

jamming detection function, return:

+QJDR: NOJAMMING

+QJDR: JAMMED

If <mode> was set to “0” which means disable the

jamming detection function, return:

+QJDR: 0

Write Command

AT+QJDR=<mode>

Response

ERROR

<mode> Disable or enable the jamming detection function

0 Jamming Detection function is disabled (default is 0)

1 Jamming Detection function is enabled

About URC description, please refer to Chapter 3.3

Indication of Jammer Presence

+QJDR: JAMMED

Indication of Jammer Removal

+QJDR: NOJAMMING

Quectel

Confidential

Indice

Altri manuali Quectel Unità di controllo

Quectel

Quectel EC25 series Supplemento

Quectel

Quectel LTE Standard Istruzioni per l'installazione e il funzionamento

Quectel

Quectel FGM842D Supplemento

Quectel

Quectel UC20 Supplemento

Quectel

Quectel SC20-CE Manuale utente

Quectel

Quectel SG865W Series Supplemento

Quectel

Quectel FCM561D-P Supplemento

Quectel

Quectel LTE-A Series Supplemento

Quectel

Quectel UG95 Supplemento

Quectel

Quectel BG96-NA Supplemento

Quectel

Quectel LTE-A Series Supplemento

Quectel

Quectel MC90-TE-A Manuale utente

Quectel

Quectel RM500Q-AE Manuale utente

Quectel

Quectel EG91 Series Supplemento

Quectel

Quectel RM502Q-GL Supplemento

Quectel

Quectel L80 Manuale utente

Quectel

Quectel LCC Series Manuale utente

Quectel

Quectel EC25 series Guida

Quectel

Quectel UG89 Supplemento

Quectel

Quectel EP06 Manuale utente

Quectel

Quectel AG35 SMTP Manuale di installazione

Quectel

Quectel Smart Module Series Supplemento

Quectel

Quectel BG772A-GL Supplemento

Quectel

Quectel BG96 Istruzioni per l'installazione e il funzionamento

Manuali Unità di controllo popolari di altre marche

Festo

Festo Compact Performance CP-FB6-E Manuale elenco delle parti

Elo TouchSystems

Elo TouchSystems DMS-SA19P-EXTME Manuale utente

JS Automation

JS Automation MPC3034A Manuale utente

JAUDT

JAUDT SW GII 6406 Series Guida rapida

Spektrum

Spektrum Air Module System Manuale utente

BOC Edwards

BOC Edwards Q Series Manuale utente

KHADAS

KHADAS BT Magic Manuale utente

Etherma

Etherma eNEXHO-IL Manuale utente

PMFoundations

PMFoundations Attenuverter Manuale utente

GEA

GEA VARIVENT Manuale utente

Walther Systemtechnik

Walther Systemtechnik VMS-05 Manuale utente

Altronix

Altronix LINQ8PD Istruzioni per il montaggio

Eaton

Eaton Powerware Series Manuale utente

WAGO

WAGO 750-407/040-000 Manuale utente

Sony

Sony CCU-590 Manuale utente

Graco

Graco 25D614 Manuale utente

Task Force Tips

Task Force Tips YE-RF-900 Manuale di programmazione

Shini

Shini SPV-U Series Manuale utente