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Wi-Fi / Cellular Integration Implementation with U-Blox Cellular and Short Range Communication Modules Application Note

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Wi-Fi / Cellular Integration Implementation with U-Blox Cellular and Short Range Communication Modules Application Note Wi-Fi / Cellular Integration Implementation with u-blox cellular and short range communication modules Application Note Abstract This document describes the implementation of the IEEE 802.11 communication features in u-blox cellular modules. Techniques for configuration and use of router mode are also described. www.u-blox.com UBX-14003264 - R06 Wi-Fi / Cellular Integration - Application Note Document Information Title Wi-Fi / Cellular Integration Implementation with u-blox cellular and short range communication Subtitle modules Document type Application Note Document number UBX-14003264 Revision and date R06 18-Oct-2018 Disclosure Restriction Product status Corresponding content status Functional Sample Draft For functional testing. Revised and supplementary data will be published later. In Development / Objective Specification Target values. Revised and supplementary data will be published later. Prototype Engineering Sample Advance Information Data based on early testing. Revised and supplementary data will be published later. Initial Production Early Production Information Data from product verification. Revised and supplementary data may be published later. Mass Production / Production Information Document contains the final product specification. End of Life This document applies to the following products: Product name TOBY-L2 series ELLA-W1 series u-blox or third parties may hold intellectual property rights in the products, names, logos and designs included in this document. Copying, reproduction, modification or disclosure to third parties of this document or any part thereof is only permitted with the express written permission of u-blox. The information contained herein is provided “as is” and u-blox assumes no liability for its use. No warranty, either express or implied, is given, including but not limited to, with respect to the accuracy, correctness, reliability and fitness for a particular purpose of the information. This document may be revised by u-blox at any time without notice. For the most recent documents, visit www.u-blox.com. Copyright © u-blox AG. UBX-14003264 - R06 Page 2 of 54 Wi-Fi / Cellular Integration - Application Note Contents Document Information ................................................................................................................................ 2 Contents .......................................................................................................................................................... 3 1 Introduction ............................................................................................................................................. 5 1.1 Scope ............................................................................................................................................................. 5 2 System architecture ............................................................................................................................. 6 2.1 TOBY-L2 and ELLA-W1 subsystem architecture ................................................................................. 6 2.1.1 Hardware reference subsystem ...................................................................................................... 8 2.1.2 Software reference subsystem ....................................................................................................... 9 2.2 Network configurations ............................................................................................................................ 11 2.2.1 Router mode with Internet access via cellular network ............................................................. 11 2.2.2 Router mode with Internet access via external hotspot ...........................................................12 2.2.3 Router mode with Internet access via cellular network or via external hotspot .................. 13 2.2.4 Bridge mode with Internet access either via cellular network or via external hotspot ...... 14 2.3 Dial-up connections in TOBY-L2 with ELLA-W1 subsystem ............................................................ 15 2.4 Additional scenarios suitable for the Wi-Fi clients ............................................................................ 16 2.5 Local dial-up connection in TOBY-L2 with ELLA-W1 subsystem ..................................................... 17 3 Wi-Fi AT commands examples ........................................................................................................ 19 3.1 TOBY-L2 in router mode with Internet access via cellular network ............................................... 19 3.2 TOBY-L2 with Internet access via an external hotspot .................................................................... 20 3.3 TOBY-L2 with Internet access via cellular network or via an external hotspot ............................21 4 Hardware integration ........................................................................................................................ 23 4.1 General considerations ............................................................................................................................ 23 4.2 Guidelines for Wi-Fi / Cellular circuit design ........................................................................................ 24 4.3 Guidelines for Wi-Fi / cellular layout design ......................................................................................... 25 5 Routing examples: cellular/Wi-Fi in router mode ...................................................................... 27 5.1 TOBY-L2 in router mode (1 dial-up, 1 CDC-ECM) ................................................................................. 27 5.2 TOBY-L2 in router mode (1 dial-up, 1 local dial-up) ............................................................................. 29 5.3 TOBY-L2 in router mode (1 local dial-up) .............................................................................................. 32 Appendix ....................................................................................................................................................... 36 A WebUI user guide ................................................................................................................................ 36 A.1 WebUI system configuration .................................................................................................................. 36 A.2 Setting pages ............................................................................................................................................. 36 A.2.1 Login page .......................................................................................................................................... 36 A.2.2 Overview page.................................................................................................................................... 37 A.2.3 Internet ............................................................................................................................................... 37 A.2.4 WLAN AP ............................................................................................................................................ 38 A.2.5 WLAN STA ......................................................................................................................................... 39 A.2.6 System ................................................................................................................................................ 40 A.3 Start-up ....................................................................................................................................................... 41 B Cellular and Wi-Fi RF coexistence ................................................................................................. 45 UBX-14003264 - R06 Page 3 of 54 Wi-Fi / Cellular Integration - Application Note B.1 Cellular and Wi-Fi RF coexistence solution .......................................................................................... 45 C Cellular throughput vs. Wi-Fi throughput ................................................................................... 47 D Regional domain block for the Wi-Fi interface ......................................................................... 48 E Wi-Fi authentication suite ............................................................................................................... 49 F Wi-Fi signal levels ............................................................................................................................... 50 G Glossary .................................................................................................................................................. 51 Related documents ................................................................................................................................... 53 Revision history .......................................................................................................................................... 53 Contact .......................................................................................................................................................... 54 UBX-14003264 - R06 Page 4 of 54 Wi-Fi / Cellular Integration - Application Note 1 Introduction 1.1 Scope This document describes how to integrate an ELLA-W1 series short range radio communication Wi- Fi module with a TOBY-L2 series cellular module to provide router functionality. ☞ TOBY-L2
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