Early Release Assistance Indication

RE: Early Release Assistance Indication

con2021 — Thu, 06 Jan 2022 09:25:21 GMT

Hi ced27, we did not come to it yet. We are still busy with other things. Let us keep updating it here if we have new information

RE: Early Release Assistance Indication

ced27 — Wed, 05 Jan 2022 14:26:49 GMT

Hi con2021,

can you please tell me how you manage to implement RAI?

Thanks in advance.

Best regards,

Cedric

RE: Early Release Assistance Indication

Stian Røed Hafskjold — Wed, 10 Nov 2021 14:18:18 GMT

ACK is handled by using the "one response" setting, which will keep the link open until the next downlink transmission (i.e. the TCP ACK) is done. When the feature is enabled, there are socket options to set the mode. The socket option should be set before the packet that will be ACKed is sent.

Unfortunately we do not have any examples showing this with TCP yet, but we have code for ICMP that utilizes the RAI functionality here:

https://github.com/nrfconnect/sdk-nrf/blob/332d2d1bc4aa335673aa0738e411aff0f2195915/samples/nrf9160/modem_shell/src/ping/icmp_ping.c#L343

RE: Early Release Assistance Indication

con2021 — Mon, 08 Nov 2021 09:48:05 GMT

Thanks, we use TCP, so to give the release order, we need first to know that we have received the ack. How can we know that the modem has received the TCP ACK (so that we can now release the RRC_CONNECTED mode)? Or is it done automatically that we activate the RAI command, and the network will release us directly after (within) the ack frame?

RE: Early Release Assistance Indication

Stian Røed Hafskjold — Mon, 08 Nov 2021 08:10:57 GMT

Old %XRAI command is only for Control Plane (data) RAI and control plane data is only supported in NB-IoT (whole industry, not just nRF91).

In mfw1.3.0 %RAI will enable support for both CP RAI and AS RAI and then the application will need to give release assistance information via socket interface to modem.

RE: Early Release Assistance Indication

con2021 — Tue, 02 Nov 2021 12:23:12 GMT

Thank you. It is not very clear what is the difference between the AT commands %RAI and %XRAI. Can you please clarify that

RE: Early Release Assistance Indication

Stian Røed Hafskjold — Tue, 02 Nov 2021 10:44:45 GMT

Hi, please have a look at the AT command AT%RAI: https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/nw_service/rai.html?cp=2_1_7_15