The set command sets Release Assistance Indication (RAI).
Syntax:
%XRAI[=<rai>]
The set command parameter and
its defined values are the following:
- <rai>
- RAI sent to the network
- 0 – Undefined, default
- 3 – Control plane one response (see 3GPP TS 24.301, subclause
9.9.4.25)
- 4 – Control plane no response (see 3GPP TS 24.301, subclause
9.9.4.25)
Note:
- RAI is used in control plane data. The current release supports control plane data
only in Narrowband Internet of Things (NB-IoT).
- When <rai> is set to 3 or 4, the User Equipment (UE) includes RAI to the next control plane uplink data transmission until a new value is
given. The network is not expecting more uplink data and releases the radio connection.
Further uplink data transfer requires additional signaling for establishing a radio
connection.
- This method does not function properly when an application or device sends multiple
packets to uplink without receiving anything in between. The %XRAI
setting does not mark a specific packet as the last one, and the application does not
know when a packet has actually been sent.
The command configuration is
stored to Non-volatile Memory (NVM) approximately every 48 hours and when the modem is
powered off with the +CFUN=0
command.Active %XPOFWARN warning blocks the storing to
NVM.v1.3.x≥2
The following command
example sets RAI when the application has one packet to be sent and no response from the
network is expected:
AT%XRAI=4
OK
This setting should be
disabled only after it is clear that the data has been sent or the final receive has been
done. This indication could be received, for example, from +CSCON when the device
enters LTE idle state.