芯讯通无线科技(上海)有限公司

   

官网通知

2019/04/03

Declaration of GPS week rollover issue

Dear customer,

Thank you very much for choosing SIMCom modules

 

We:

Shanghai SIMCom Wireless Solutions Ltd.

 

Declare that there is no GPS week rollover issue (refer to Appendix) on the modules listed below until the date marked.

Module No

FW

When the week rollover issue would occur

SIM5320 Series

All FW versions

2019/11/3

SIM5360 Series

All FW versions

SIM7100 Series

All FW versions

SIM68R

B03V00SIM68R11,B03V10SIM68R11

2022/10/29

B03V11SIM68R_11/96 ~ B03V23SIM68R_11/96

SIM68RB

B03V60SIM68RB 11/96,B03V61SIM68RB96

SIM68V

B03V00SIM68V_11, B03V10SIM68V_11,B03V21SIM68V_38

B03V11SIM68V_11/96 ~ B03V23SIM68V_11/96

SIM68VB

B03V60SIM68VB11/96,B03V61SIM68VB11

SIM968

B03V11SIM968_11,B03V20SIM968_11 

SIM33ELA

B03V20SIM33ELA1/9 ~ B05V83SIM33ELA1/9

2025/8/16

SIM33EAU

B05V82SIM33EAU1/9

SIM68E

B03V60SIM68E_96 ~ B05V84SIM68E_96

B04V62SIM68E_11 ~ B05V84SIM68E_11

B04V64SIM68E3D9 ~ B05V81SIM68E3D9

SIM68M

B03V20SIM68M_11/96 ~ B05V81SIM68M_11/96

SIM68MB

B03V62SIM68MB11/96 ~ B05V80SIM68MB11/96

SIM68R

B03V24SIM68R_11/96 ~ B05V80SIM68R_11/96

SIM68RB

B03V62SIM68RB1A/9A

B03V62SIM68RB11/96 ~ B04V61SIM68RB11/96

SIM68V

B04V64SIM68V48P

B04V62SIM68V_11/96 ~ B05V85SIM68V_11/96

SIM68VB

B03V62SIM68VB_11/96 ~ B04V60SIM68VB_11/96

B04V61SIM68VBD9 ~ B05V81SIM68VBD9

B05V82SIM68VB9B

SIM968

B03V21SIM968_96,B04V60SIM968_11/96,

B05V20SIM968_J1,B05V81SIM968_11

B04V60SIM968B11/96 ~ B04V61SIM968B11/96

SIM808

All FW versions

2030/8/10

SIM28ML

All FW versions

SIM28ML-H

All FW versions

SIM28M

All FW versions

SIM28

All FW versions

SIM928A

All FW versions

SIM39EAR

All FW versions

SIM39EAU

All FW versions

SIM39EA

B02V32SIM39EA48,B02V60SIM39EA11/96/19

B02V50SIM39EA19 ~ B02V51SIM39EA19

B02V31SIM39EA11 ~ B02V32SIM39EA11

B02V10SIM39EA96 ~ B02V51SIM39EA96

SIM7500 Series

All FW versions

2032/12/12

SIM7600 Series

All FW versions

SIM7800 Series

All FW versions

SIM7000 Series

All FW versions

SIM868

All FW versions

2034/8/12

SIM868E

All FW versions

SIM68E

B06V11SIM68E_11/96 ~ B06V14SIM68E_11/96

SIM68M

B05V83SIM68M_11

B06V11SIM68M_11/96 ~ B06V14SIM68M_11/96

SIM68MB

B06V10SIM68MB11/96 ~ B06V11SIM68MB11/96

SIM68R

B06V10SIM68R_11/96 ~ B06V11SIM68R_11/96

SIM68RB

B05V10SIM68RB11/96 ~ B06V11SIM68RB11/96

SIM68V

B06V10SIM68V_11/96 ~ B06V11SIM68V_11/96

SIM68VB

B06V10SIM68VB11/96 ~ B06V11SIM68VB11/96

SIM33ELA

B06V10SIM33ELA1/9 ~ B06V11SIM33ELA1/9

SIM33EAU

B06V10SIM33EAU1/9 ~ B06V11SIM33EAU1/9

SIM39EA

B02V60SIM39EA11/96/19

2035/9/8

 

Appendix

What is GPS week rollover issue?

The Week Rollover Problem is a known issue caused by the way that GPS used to handle the week element of the data that forms an essential part of the navigation signal. GPS used a 10 bit field to encode the week number in each GPS time message, which means that a maximum of 1,024 weeks (19.7 years), could be handled. Each of these periods is known in GPS terms as an “epoch”.

At the end of each epoch of 1,024 weeks, the receiver resets the week number to zero and starts counting again. 

全球领先的M2M模块及解决方案供应商

芯讯通无线科技有限公司(SIMCom Wireless Solutions)作为日海智能(深股002313)控股子公司,是全球领先的M2M模块及解决方案供应商。自2002年成立以来,一直致力于提供GSM/GPRS/EDGE,WCDMA/HSPA/HSPA+,CDMA 1xRTT/EV-DO,FDD/TDD-LTE,eMTC(CAT-M1) ,NB-IoT无线蜂窝通信以及GPS/GLONASS/BEIDOU卫星定位等多种技术平台的模块或终端级别解决方案。根据美国知名市场研究公司ABI Research Inc.最新的M2M报告显示,芯讯通无线通信模块销售量连续三年占全球领先地位。

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