Coexistence philosophy for colocated WiFi, Bluetooth (Classic or LE), ZigBee radios on the same PCB

sandeep suresh

Dear all,

Can you please help me with application notes containing details of signals used, working philosophy of coexistence mechanism when multiple 2.4GHz radios are COLOCATED on the same PCBs?

a. ZigBee and WiFi (802.11 b/g/n).

b. ZigBee and BT. (BT blacklists ZigBee occupied channel is what I understand).

c. WiFi and BT. (BT blacklists WiFi occupied channel is what I understand...but in a crowded WiFi environment might end up blacklisting all BT channels !!!)

d. ZigBee, WiFi and BT all existing on the same board and working simultaneously.

After searching on this topic, I could get some links...but not with all the 3 radios together on the same PCB and working simultaneously.

Thanks in advance

Regards

Sandeep.

over 9 years ago

0 Joseph Gigi over 9 years ago

TI__Guru* 85400 points

Hi Sandeep,

We have an application note on the WiLink8 Coexistence mechanism (WiFi + BT). Please see: processors.wiki.ti.com/.../WiLink8_-_TI_Coexistense_Tutorial_1.pdf

For Zigbee and WiFi CoEx, please see: processors.wiki.ti.com/.../WiFi_ZigBee_Coexistence

We do not have ZigBee + BT coex mechanism.

Regards,
Gigi Joseph.

0 sandeep suresh over 9 years ago in reply to Joseph Gigi

Intellectual 440 points

Hello Giri,

Thanks for your response. I had a look at the ZigBee and WiFi Coexistence link you had sent, but unable to understand the principle of working as these details are not available in any application note, user guide or data sheet. I had come across three signals: Rx_ACTIVE, Tx_ACTIVE and PA_SHUTDOWN/Request; please see the link below: http://processors.wiki.ti.com/index.php/WL18xx_Module_Schematic_Checklist#WiFi_Zigbee_Coex.

Can you share more details on the working principle with timing diagrams etc.

Thanks & regards
Sandeep.

0 Joseph Gigi over 9 years ago in reply to sandeep suresh

TI__Guru* 85400 points

Hi Sandeep,

There are no additional details available for Zigbee + WLAN coexistence other than what is available in the wiki page. Its handled inside the wl18xx firmware, and most of it is proprietary.

Regards,
Gigi Joseph.

0 sandeep suresh over 9 years ago in reply to Joseph Gigi

Intellectual 440 points

Hello Gigi,
Thanks for your response. Regarding the comment, ". .....Its handled inside the wl18xx firmware, and most of it is proprietary.....". The Rx_ACTIVE and Tx_ACTIVE lines are input to ZigBee module and PA_SHUTDOWN/Request line is output from ZigBee module. Can you help to understand, how ZigBee module handles these lines as this is not Wl18xx specific?
Thanks & regards
Sandeep.

0 Joseph Gigi over 9 years ago in reply to sandeep suresh

TI__Guru* 85400 points

Hi Sandeep,

I think it is better that you check this on the Zigbee specific forum.

Regards,
Gigi Joseph.

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Coexistence philosophy for colocated WiFi, Bluetooth (Classic or LE), ZigBee radios on the same PCB