Be prepared for Sigfox Verified TM Certification

Transcription

1 Version August 10, 2018 Be prepared for Sigfox Verified TM Certification Public Use Note: Only the last version of this document available on the Sigfox web sites is official and applicable. This document is the property of Sigfox. It shall not be copied and / or disclosed to third parties, in any form without Sigfox written permission.

2 IMPORTANT NOTICE The device proposed in Sigfox Certification has to be representative of production device, as defined in terms and agreement signed when filing a certification. To succeed in your Sigfox certification, you need to : Read carefully this document and follow all the steps described in it. Answer properly in the Checklist questions. Test your device with the Radio_Signal_Analyzer tool (available on ), which could help during the development. Follow the Sigfox Verified Modem Test Procedure RSA-SDR Dongle to prepare yourself to the certification tests. ADJUSTABLE OUTPUT POWER If the device proposed in Sigfox Certification has the option to change the output power : Two certification test reports have to be done : The Partner has to provide both ways to configure in minimum and maximum output power the DUT. Otherwise Partner has to fix the output power for the certification and remove the capability of his device to configure the output power. 1

3 Contents 1 Introduction Scope Acronyms and abbreviations Be prepared Step by Step Step 1 : Get the Sigfox modem specifications Step 2 : Integrate the Sigfox Protocol Library Candidate Device Hardware prerequisites Candidate Device Software prerequisites Step 3 : Validate your Sigfox device Step 4 : Prepare information on your candidate device Candidate Device information Candidate Device documentation Step 5 : Send Candidate Device to Sigfox accredited laboratory Step 6 : Get your Sigfox Verified TM certificate : Filing Appendix 13 2

4 1 Introduction 3

5 1.1 Scope There are various phases to be followed to build a Sigfox device. When building a Module or Reference Design, the Device Maker has to present its device to the Sigfox Verified TM certification. This certification handles all the Sigfox RF and protocol tests executed in conducted mode. You have to contact a Sigfox Sales representative to sign a Sigfox Verified TM program. This document intents to describe all the pre-requisites for the Device Maker to prepare a Sigfox Verified TM certification. 1.2 Acronyms and abbreviations - 2GFSK: 2-Level Gaussian Frequency Shift Keying - ACK: Acknowledgement - AES: Advanced Encryption Standard - Att: Attenuator - CAB: Client Application Board - CBC: Cipher Block Chaining - CS: Carrier Sense - Cold Test: Test executed in initial condition (wait till the DUT come back to the initial system between two tests) - DBPSK: Differential Binary Phase-Shift Keying - DUT: Device Under Test - ENC: Encrypted - Fd: DUT Frequency - Fe: Equipment Frequency - Legacy Uplink: initial payload format of Sigfox Uplink without encryption - LBT: Listen Before Talk - NVM: Non Volatile Memory - OOB: Out Of Band - PAC: Porting Authorization Code - PER: Packet Error Rate - PMR: Private Mobile Radio - RC: Radio Configuration - RF: Radio Frequency - RSA: Radio_Signal_Analyzer - RSSI_dut: DUT RSSI - RSSI_eq: Equipment RSSI - SMIQ: Vector Signal Generator - SOC: System On Chip - Sigfox Message: Three frames with payload A3B - UNB_MODEM: Ultra Narrow Band MODEM - UNBT: Ultra Narrow Band Transceiver 4

6 2 Be prepared Step by Step 5

7 2.1 Step 1 : Get the Sigfox modem specifications You can get the latest Sigfox Modem Specification per Radio Configuration on the Sigfox BUILD website : ( Sigfox Verified modem specification - for RF and Protocol (i.e.: PRS_UNB_MODEM_RC1_UDL.pdf ) Sigfox Verified modem test plan (i.e.: PTP_UNB_MODEM_RC1_UDL.pdf ) Ensure you read those documents properly to match all Sigfox Requirements on your device. Both software and hardware concerns need to be studied to verify that final End Product will pass the Sigfox Verified TM certification. The Radio Configuration are set as below : Parameter RC1 RC2 RC3a/c RC4 RC5 RC6 Uplink Central Frequency(MHz) Downlink Central Frequency(MHz) Spectrum Access DC 1% FH LBT FH LBT DC 1% Also verify that you provide all the pre-requisites mentionned in next sections before delivering your candidate device to the Test Lab. 2.2 Step 2 : Integrate the Sigfox Protocol Library Once the library has been built for your microprocessor (Sigfox only delivers binary format), integrate it and code the RF driver functions. For that phase, many RF Silicon founders propose Sigfox compatible Modulation code : contact them to get the latest update of their code. At least, ensure you followed all the pre-requisites to Sigfox Verified TM test execution and production which are listed below Candidate Device Hardware prerequisites [PREREQUISITE-10] RF connector Pre-Requisite Description: UNB_MODEM must have an RF connector (SMA,... ) to be able to perform measurements in conducted mode. Take care about the matching on this RF connector. If this is not an SMA connector, please provide the associated cable. [PREREQUISITE-11] Prototype closed to production sample Pre-Requisite Description: UNB_MODEM candidate must be as close as possible as the production sample. Example : No wrapped wires 6

8 2.2.2 Candidate Device Software prerequisites [PREREQUISITE-20] Sigfox Verified Modem software version flashed Pre-Requisite Description: UNB_MODEM must have the Sigfox modem software version, candidate for the certification, flashed in it. The candidate version for the Sigfox Verified certification shall only contain specific code for the Sigfox Modulation and Protocol modem critical part - do not include your application code into this version number to avoid new execution of Sigfox Verified Certification for any change in the application code. If your software depends on external source libs (coming from RF IC Maker), please list the different versions used to compose the final modem software version impacting Sigfox requirements. Sigfox accredited tester won t flash any release in the candidate device. Example : Final modem version : V3.4 [PREREQUISITE-21] Modem software and Sigfox Lib version check Pre-Requisite Description: UNB_MODEM must provide a way to check (i.e: with a command) and display the modem Software and Sigfox Lib and addon verified version number present in the device. Modem SW version is applicable only for the Sigfox Modulation and Protocol modem critical part which means that if the same microprocessor contains both Application and Sigfox code, a specific SW version has to be used to label Sigfox Modulation and protocol part. All versions should be provided in the checklist. Example : AT$V? V1.2 AT$LIB? V2.2.2 AT$ADDON? V0.4.0 [PREREQUISITE-22] Frequency Offset Calibration parameter Pre-Requisite Description: Manufacturer has to provide a way (give the command or else) to set the Frequency offset of the device for Calibration purpose if needed (This offset should be applied to Uplink and Downlink Frequency). This will be mainly used at the manufacturing step. This pre-requisite could be NOT-APPLICABLE if your hardware is designed with an oscillator which satisfies all Sigfox requirements without calibration, so write NA and give the reason. Example : AT$FOFFSET = value [PREREQUISITE-23] RX RSSI Offset Calibration parameter for GFSK Pre-Requisite Description: Manufacturer has to provide a way (give the command or else) to set the RX RSSI offset of the device for Calibration purpose. This is to allow End Product makers to adapt RSSI level according their loss environment. Example : AT$RSSIOFFSET = value [PREREQUISITE-24] LBT Carrier Sense duration Pre-Requisite Description: Manufacturer has to provide the duration of the Carrier Sense. This will be used to configure the blocker in LBT related test. Example : CS : 6ms. [PREREQUISITE-25] RSSI Offset Calibration parameter for LBT Threshold 7

9 Pre-Requisite Description: Manufacturer has to provide a way (give the command or else) to set the RSSI LBT Threshold offset of the device for Calibration purpose. This is to allow End Product makers to adapt RSSI level according their loss environment. Example : AT$RSSILBTOFFSET = value [PREREQUISITE-26] RX RSSI Calibrated Pre-Requisite Description: UNB_MODEM candidate must be calibrated in RX RSSI level +/- 2 db (use the RX-GFSK Test Mode to calibrate) before shipping your device candidate. [PREREQUISITE-27] RX GFSK Reporting Pre-Requisite Description: UNB_MODEM candidate must provide a way to know (print, GPIO or else...) that the frame is received with its RSSI level, through the RX-GFSK test mode. During the test mode, device must output (UART or else) the report status (FAILED or PASSED through report test result) and RSSI level of each GFSK pattern received. Example : During the Test Mode RX-GFSK : the RSSI value will be returned in the terminal with "TEST-PASSED" if the frame has been received properly. [PREREQUISITE-28] Test Procedure Commands availability Pre-Requisite Description: UNB_MODEM must provide an interface to activate all SIGFOX ADDONS Library test modes, Sigfox Message and other command (Public Key, config Words, etc...) mentionned in the Sigfox Test Procedure. This can be done through AT commands or any command (give all commands), Built-in tests (hardcoded functions), GPIOs,... Without all commands in the Test procedure, the Accredited Test Laboratory will not be able to perform tests. Example : Test Mode TX-BPSK : command AT$TM=0 Test Mode TX-PROTOCOL Config 1 : command AT$TM=1,1 Sigfox Message (payload 1 bit only) : command AT$SB=1 Sigfox Message (all payload size) : command AT$SF=4041 (2 bytes for example) Switch Public Key : command AT$PUB=1 ConfigWord : command AT$CW= , , ,0 [PREREQUISITE-29] Continuous Modulation CM test mode available Pre-Requisite Description: Manufacturer has to provide a way (give the command or else) to generate a continuous modulated signal at a specific frequency. Example : AT$CM= ,1 [PREREQUISITE-30] Continuous Wave CW test mode available Pre-Requisite Description: Manufacturer has to provide a way (give the command or else) to generate a continuous wave unmodulated signal at a specific frequency. Example : AT$CW= ,1 8

10 [PREREQUISITE-31] NVM ID and KEY Pre-Requisite Description: UNB_MODEM must include a Non Volatile Read Only Memory to store ID (32bits).ID must be Read Only. UNB_MODEM must include a Non Volatile Read Only Memory to store Key(128bits). KEY must be Read Only by AES Module. Do not provide any command for the final user to read or write the private key. Manufacturer has to follow the Security Guidelines (Sigfox-Best_Current_Practices_v1.0.pdf) that can be found in Build web site ( Example : Your Modem should not contain a command to read the KEY. [PREREQUISITE-32] Specific Credentials Pre-Requisite Description: UNB_MODEM must be flashed with a specific private test Key, test ID and test PAC for the certification. Tester needs at least the ID and the private KEY flashed in the product. If you re using a SOC containing already credentials, please ask to have the following ones. In case Secure Element is used for the device, provider has to deliver the Device Maker with Test Samples flashed with these values. ID = 0xFEDCBA98 ( ID[0]=0x98, ID[3]=0xFE ) (Warning : Be careful on the ID endianess for Backend end CRA ID manipulation.) KEY = 0x ABCDEF ABCDEF ( KEY[0]=0x01, KEY[15]=0xEF ) PAC = 0x ( PAC[0]=0x54, PAC[7]=0x43 ) Test equipment tools are designed to decode by default these credentials. If you are providing a device with different value, indicate all values. [PREREQUISITE-33] Access to ID and PAC Pre-Requisite Description: UNB_MODEM must provide a way (give the command or else) to get ID and initial PAC, this command is mandatory to allow End Product Maker / User to register device on the network. PAC is the Porting Authorization Code. ID = Unique ID (4 bytes length) PAC = Initial PAC used for Device registering on SIGFOX network (8 bytes length) : mandatory to give to customer for registering Example : AT$ID? and AT$PAC? [PREREQUISITE-34] Repeater Back to Listening Timing Pre-Requisite Description: Manufacturer has to provide the minimum time for the Repeater to come back to listening mode. This will be used during the certification tests to ensure all frames sent from the equipement will be received by the Repeater. NOT APPLICABLE if not Repeater device. 9

11 2.3 Step 3 : Validate your Sigfox device The Sigfox Verified TM certification checks all the requirements defined in Sigfox Verified modem specification that the Device Maker loaded in Step 1. To validate almost all those requirements and prevent the Device Maker to be out of specification, Sigfox proposes a small RF USB dongle (SDR DONGLE) combined with the Radio_Signal_Analyzer tool (RSA) that runs on a computer. Check the Sigfox BUILD website to get this equipment and the Sigfox Verified modem Test procedure RSA-SDR Dongle which allows to execute the tests. ( Look at the Sigfox Verified modem Test Plan for all the tests that cannot be executed with RSA-SDR Dongle. 2.4 Step 4 : Prepare information on your candidate device This section describes all the information to be delivered to the Sigfox laboratory for the test execution Candidate Device information [PREREQUISITE-40] Input Power Supply Pre-Requisite Description: Manufacturer has to provide the nominal value (give the value of your modem datasheet, not the SOC or RF IC datasheet) and the range of input power supply voltage that is written is the datasheet of the device. (Operational Tests are executed on min, max and nominal values) Min and Max values could be the same if the candidate product is always supplied with the same voltage (datasheet indicates one supported value). Example : 3.0V - 3.3V - 4.2V [PREREQUISITE-41] Input Power Supply Testability Pre-Requisite Description: Manufacturer has to provide a way (give instruction to measure/inject) to test the full range of power supply delivered in previous pre-requisite. [PREREQUISITE-42] Adjustable Output Power Pre-Requisite Description: Manufacturer has to provide the full range of the output power (give the value of your modem datasheet, not the SOC or RF IC datasheet) that is written in the datasheet of the device in case of adjustable output power. (Tests are executed on min and max values) This pre-requisite could be NOT-APPLICABLE if the device has a fixed output power value. Example : To configure the device in minimum output power send : AT$302=10, in maximum output power send AT$302=14. This command has to be sent before any other command after reset. 10

12 2.4.2 Candidate Device documentation [PREREQUISITE-50] Oscillator datasheet Pre-Requisite Description: Manufacturer has to provide the datasheet of the radio oscillator. This will be helpfull to check the global frequency accuracy of the device. This datasheet must include Ageing value (for 5 years) Temperature tolerance (with the temperature range) Example : Aging : +/- 2ppm (for 5 years) and temperature +/- 3ppm (-40 to +60 degree Celsius). [PREREQUISITE-51] Device Configuration Pre-Requisite Description: The Device Maker must provide all information needed to test his device : Radio configuration Modem type Encryption capability Repeater Secure Element Example : RC1, Uplink and Downlink, No Encryption, No repeater, no SE [PREREQUISITE-52] Device Identification Pre-Requisite Description: The Device Maker must provide all DUT information : Commercial product name Certification type (Module or Reference Design) Example : Product name : SigfoxV3, This is a reference design. [PREREQUISITE-53] User Manual Pre-Requisite Description: The Device Maker must provide a User Manual only with all the information to be able to execute Sigfox Certification tests. Example : UART : Baudrate, Databits, Stopbits, Parity, etc.. External power supply picture. 2.5 Step 5 : Send Candidate Device to Sigfox accredited laboratory Before sending the device, the Device Maker has to ensure he based his device on the latest Sigfox Specification (mentionned in Step 1) and the latest ADDON VERIFIED. Check the Sigfox Verified TM be_prepared with the accredited test laboratory and contact them to ask for a certification test slot. Ensure that your device is calibrated (Frequency, RX RSSI and LBT RSSI). Be aware that for Sigfox filling, the Sigfox accredited Laboratory will only perform ambient temperature testing. According to your application, Sigfox advises you to plan temperature testing with the Sigfox accredited Laboratory to match your device operation. 11

13 2.6 Step 6 : Get your Sigfox Verified TM certificate : Filing Sigfox delivers the Sigfox Verified TM certificate based on Sigfox accredited Laboratory test report package. Device Maker must deliver all technicals documents (BOM, Schematic, layout) with version number and pdf files, to get his certificate. Each technical document must contain the Sigfox modem limits (example : Identify in the BOM the list of the Sigfox components modem, Mark out in the Schematic the Sigfox modem part). 12

14 3 Appendix 13

15 Sigfox VerifiedTM Checklist Print this checklist, fill it in with the appropriate information (value, commands or check mark when applicable) and provide it to Accredited Test Laboratory along with your candidate device. Your candidate device has to be calibrated (Frequency / Level [RX RSSI and LBT RSSI]). Each certification attempt could be invoiced by Accredited Test Laboratory, even with a FAIL verdict in test report. Prerequisite Type Response [PREREQUISITE-10] What kind of RF connector is soldered on the device? [PREREQUISITE-11] Do you confirm the sample used for Certification is closed to production sample? (Yes/No) [PREREQUISITE-20] What is the SW version flashed in the device? [PREREQUISITE-21] What are the ways to retrieve the modem SW and Sigfox Lib and addon versions? Give all versions [PREREQUISITE-22] What is the way to set the frequency calibration offset? [PREREQUISITE-23] What is the way to set the RSSI calibration offset? DOWNLINK-MODEM [PREREQUISITE-24] What is the duration of your Carrier Sense? [PREREQUISITE-25] What is the way to set the RSSI LBT threshold calibration offset? [PREREQUISITE-26] Do you confirm that you calibrated the RSSI of your device +/- 2 db? (yes/no) DOWNLINK-MODEM [PREREQUISITE-27] What is the way choosen to report the received frame and RSSI information? DOWNLINK-MODEM [PREREQUISITE-28] Following the Test Procedure What is the way to activate all test mode and Sigfox Message and Commands needed for testing? [PREREQUISITE-29] What is the way to generate a continuous modulated [PREREQUISITE-30] What is the way to generate an umodulated continuous [PREREQUISITE-31] Do you confirm that you follow the Security guidelines for ID and KEY? [PREREQUISITE-32] Do you confirm that you are using test credential values? [PREREQUISITE-33] What is the way to get ID and Initial PAC? [PREREQUISITE-34] What is the minimum time for the Repeater to come back in listening mode? [PREREQUISITE-40] What is the nominal minimum and maximum voltage of your device? [PREREQUISITE-41] Explain the way to test on Nominal Minimum and Maximum voltage? (if needed, provide power supply cables) [PREREQUISITE-42] What is the way to configure your device in minimum and maximum output power? (ONLY for adjustable output power devices) [PREREQUISITE-50] What are the ageing and temperature oscillator frequency accuracy values? [PREREQUISITE-51] Provide all the needed information to execute the tests (Radio configuration, Modem type, Encryption capability) [PREREQUISITE-52] Provide the commercial product name and the certification type (Module or Reference Design) [PREREQUISITE-53] Provide all the needed information to execute Sigfox Certification tests ( User Manual ) HW HW SW SW Check SW Check SW Check SW SW Check SW SW SW SW Check SW Check SW SW or SE SW Check REPEATER INFO INFO INFO DOC DOC DOC DOC 14

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