How are beacons received in IEEE 802.15.4 receiver example using radio

RE: How are beacons received in IEEE 802.15.4 receiver example using radio

Simonr — Tue, 01 Oct 2019 12:14:33 GMT

I've gotten a reply from the devs. Again, sorry about the delay.

First, can you clarify the following points, as there is some ambiguity in your question:

Do you use the 802.15.4 PHY/MAC from the nRF5 SDK or the 802.15.4 radio driver from nRF5 SDK for Thread and Zigbee?
Do you use a scan primitive to request and receive beacons?
Is it an active or a passive scan?
It's not clear if you created a beacon-enabled network or a non-beacon enabled network. Please specify.

Next, here is one of our expert's thoughts on your initial question:

"If the customer uses MLME-SCAN.request primitive to start scanning the network, according to 802.15.4-2006 7.1.11, the device scans the network for beacons for a limited time. When this time elapses the device reports result of the scan procedure by MLME-SCAN.confirm primitive. The list of received beacons is included in the MLME-SCAN.confirm primitive or it can be delivered by a series of MLME-BEACON-NOTIFY.indication primitive, depending on the macAutoRequest configuration parameter."

Best regards,

Simon

RE: How are beacons received in IEEE 802.15.4 receiver example using radio

Simonr — Mon, 09 Sep 2019 09:30:09 GMT

Nothing as of yet, sorry about the delay.

Best regards,

Simon

RE: How are beacons received in IEEE 802.15.4 receiver example using radio

Abhigya — Mon, 09 Sep 2019 05:59:54 GMT

Thanks!
I had some doubts regarding the event_data_store structure for which I've raised another question on Devzone.

Are there any updates on the main question I had asked here?

RE: How are beacons received in IEEE 802.15.4 receiver example using radio

Simonr — Wed, 04 Sep 2019 12:18:54 GMT

Hi Abhigya

This should be found in the event_data_store structure in the fsm.c file (\...\nRF5_SDK_15.3.0_59ac345\examples\802_15_4\wireless_uart\fsm.c). I've not looked too deep into it, but it seems to be configurable as well. See the mcps_data_ind_store and mcps_data_conf_store functions.

Best regards,

Simon

RE: How are beacons received in IEEE 802.15.4 receiver example using radio

Abhigya — Wed, 04 Sep 2019 06:18:40 GMT

Thanks!

Till the time the previous question is answered, I was going through the 802.15.4 example documentation. Under the heading of 'Incoming packets: radio', it has been mentioned that:

"The incoming radio frames are stored in a queue. When this queue is filled or when the previous UART transmission is completed, the device pops the next frame from the queue and puts its MSDU payload into the UART output buffer."

I wanted to know which part of the code the queue mentioned above is created/handled. Also, if it is possible to modify or delete the contents of this queue so that at one time, the queue can store only one frame?

RE: How are beacons received in IEEE 802.15.4 receiver example using radio

Simonr — Fri, 30 Aug 2019 13:04:08 GMT

I've asked internally, for a definitive explanation of this, but this might take a few days. In the meantime, you could check out the nRF Sniffer for 802.15.4 in order to sniff the connection and see what happens yourself.

Best regards,

Simon