AN1017: Zigbee® and Silicon Labs® Thread Coexistence with Wi-Fi
This application note describes the impact of Wi-Fi on Zigbee and Silicon Labs Thread and methods to improve coexistence with Wi-Fi. These techniques are applicable to the Mighty Gecko family (EFR32MGx). First, design considerations to improve coexistence without direct interaction between Zigbee/Silicon Labs Thread and Wi-Fi radios are described. Next, Silicon Lab’s Packet Traffic Arbitration (PTA) support to coordinate 2.4GHz RF traffic for co-located Zigbee/Silicon Labs Thread and Wi-Fi radios is described. Finally, methods for using the coexistence CLI commands are discussed.
This application note describes EFR32 Zigbee and Silicon Labs Thread coexistence sup-port for EmberZNet PRO 6.6.1.0 and Silicon Labs Thread 2.10.1.0. See Section 9 Revision History for a summary of key changes in previous revisions of this application note.
Additional details about the implementation of managed coexistence and test results are available in an expanded version of this application note, AN1017-NDA: ZigBee and Thread Coexistence with Wi-Fi, available under non-disclosure from Silicon Labs technical support.
KEY POINTS：
•Wi-Fi impact on Zigbee/Silicon Labs Thread
•Improving unmanaged coexistence
•Implementing managed coexistence
•Using the coexistence CLI commands
The 2.4GHz ISM (Industrial Scientific and Medical) band supports Wi-Fi (IEEE 802.11b/g/n), Zigbee/Silicon Labs Thread (IEEE 802.15.4), Bluetooth®, and Bluetooth low energy. The simultaneous and co-located operation of these different 2.4GHz radio standards can degrade performance of one or more of the radios. To improve interference robustness, each of the 2.4GHz ISM radio standards support some level of collision avoidance and/or message retry capability. At low data throughput rates, low power levels, and/or enough physical separation, these 2.4GHz ISM standards can co-exist without significant performance impacts. However, recent customer trends are making coexistence more difficult.
•Increased Wi-Fi transmit power level for “extended range”
•+30dBm Wi-Fi Access Points are now common.
•Increased Wi-Fi throughput
•Depending on achievable SNR, high throughput requirements for file transfers and/or video streaming may result in high Wi-Fi duty cycle within 2.4GHz ISM band.
•Integrating Wi-Fi, Zigbee, Silicon Labs Thread, and Bluetooth low energy into the same device for gateway functionality
•This is required by Home Automation and Security applications and provides easier end-node commissioning using Bluetooth low energy.
This application note describes the impact of Wi-Fi on Zigbee and Silicon Labs Thread and methods to improve coexistence with Wi-Fion two Silicon Labs integrated circuits—the EM35x/EM358x and the Mighty Gecko family (EFR32MGx).
•Section 3 Unmanaged Coexistence describes design considerations to improve coexistence without direct interaction between Zigbee/Silicon Labs Thread and Wi-Fi radios. •Section 4 Managed Coexistence describes Silicon Lab’s PTA (Packet Traffic Arbitration) support to coordinate 2.4GHz RF traffic for co-located Zigbee/Silicon Labs Thread and Wi-Fi radios. PTA support is available for the EFR32MGx only.
•Section 5 Coexistence CLI Console Commands describes how to use CLI commands in Host and SoC applications.
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Application note & Design Guide |
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Please see the document for details |
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QFN48;QFN32 |
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English Chinese Chinese and English Japanese |
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July 2019 |
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Rev. 1.7 |
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AN1017 |
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3.5 MB |
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