Set command

The set command sets the requested Extended Discontinuous Reception (eDRX) parameters. 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.

When an eDRX parameter is changed, the default Paging Time Window (PTW) is set. If other than the default PTW has to be used, the %XPTW command shall be sent after the +CEDRXS command.

Syntax:

+CEDRXS=[<mode>,[,<AcT-type>[,<Requested_eDRX_value>]]]

Unsolicited result code syntax:

+CEDRXP: <AcT-type>[,<Requested_eDRX_value>[,<NW-provided_eDRX_value> [,<Paging_time_window>]]]

The set command parameters and their defined values are the following:

<mode>
0 − Disable the use of eDRX
1 − Enable the use of eDRX
2 − Enable the use of eDRX and enable the unsolicited result code
3 − Disable the use of eDRX and discard all parameters for eDRX or, if available, reset to the manufacturer-specific default values
<ActT-type>
4 − Evolved Terrestrial Radio Access Network (E-UTRAN) (WB-S1 mode)
5 − E-UTRAN (NB-S1 mode)
<Requested_eDRX_value>
String. Half a byte in 4-bit format. The eDRX value refers to bit 4 to 1 of octet 3 of the Extended DRX parameters information element (see 3GPP TS 24.008, subclause 10.5.5.32). Optional. If not present, the value of the requested eDRX period is set to the manufacturer-specific default.
Bit
4 3 2 1 – E-UTRAN eDRX cycle length duration

0 0 0 0 – 5.12 seconds1

0 0 0 1 – 10.24 seconds1

0 0 1 0 – 20.48 seconds

0 0 1 1 – 40.96 seconds

0 1 0 0 – 61.44 seconds2

0 1 0 1 – 81.92 seconds

0 1 1 0 – 102.4 seconds2

0 1 1 1 – 122.88 seconds2

1 0 0 0 – 143.36 seconds2

1 0 0 1 – 163.84 seconds

1 0 1 0 – 327.68 seconds

1 0 1 1 – 655,36 seconds

1 1 0 0 – 1310.72 seconds

1 1 0 1 – 2621.44 seconds

1 1 1 0 – 5242.88 seconds3

1 1 1 1 – 10485.76 seconds3

<NW-Provided_eDRX_value>
String. Half a byte in 4-bit format. The eDRX value refers to bit 4 to 1 of octet 3 of the Extended DRX parameters information element (see 3GPP TS 24.008, subclause 10.5.5.32).
Bit
4 3 2 1 – E-UTRAN eDRX cycle length duration

0 0 0 0 – 5.12 seconds1

0 0 0 1 – 10.24 seconds1

0 0 1 0 – 20.48 seconds

0 0 1 1 – 40.96 seconds

0 1 0 0 – 61.44 seconds2

0 1 0 1 – 81.92 seconds

0 1 1 0 – 102.4 seconds2

0 1 1 1 – 122.88 seconds2

1 0 0 0 – 143.36 seconds2

1 0 0 1 – 163.84 seconds

1 0 1 0 – 327.68 seconds

1 0 1 1 – 655,36 seconds

1 1 0 0 – 1310.72 seconds

1 1 0 1 – 2621.44 seconds

1 1 1 0 – 5242.88 seconds3

1 1 1 1 – 10485.76 seconds3

<Paging_time_window>
String. Half a byte in 4-bit format. The paging time window refers to bit 8 to 5 of octet 3 of the Extended DRX parameters information element (see 3GPP TS 24.008, subclause 10.5.5.32).
LTE-M mode
Bit
4 3 2 1 – PTW length

0 0 0 0 – 1.28 seconds

0 0 0 1 – 2.56 seconds

0 0 1 0 – 3.84 seconds

0 0 1 1 – 5.12 seconds

0 1 0 0 – 6.4 seconds

0 1 0 1 – 7.68 seconds

0 1 1 0 – 8.96 seconds

0 1 1 1 – 10.24 seconds

1 0 0 0 – 11.52 seconds

1 0 0 1 – 12.8 seconds

1 0 1 0 – 14.08 seconds

1 0 1 1 – 15.36 seconds

1 1 0 0 – 16.64 seconds

1 1 0 1 – 17.92 seconds

1 1 1 0 – 19.20 seconds

1 1 1 1 – 20.48 seconds

Narrowband Internet of Things (NB-IoT) mode
Bit
4 3 2 1 – PTW length

0 0 0 0 – 2.56 seconds

0 0 0 1 – 5.12 seconds

0 0 1 0 – 7.68 seconds

0 0 1 1 – 10.24 seconds

0 1 0 0 – 12.8 seconds

0 1 0 1 – 15.36 seconds

0 1 1 0 – 17.92 seconds

0 1 1 1 – 20.48 seconds

1 0 0 0 – 23.04 seconds

1 0 0 1 – 25.6 seconds

1 0 1 0 – 28.16 seconds

1 0 1 1 – 30.72 seconds

1 1 0 0 – 33.28 seconds

1 1 0 1 – 35.84 seconds

1 1 1 0 – 38.4 seconds

1 1 1 1 – 40.96 seconds

The following command example enables eDRX and sets the requested eDRX value:

AT+CEDRXS=1,4,"1000"
OK

The unsolicited notification when <mode> 2 is used:

+CEDRXP: 4,"1000","0101","1011"
OK
1 The value is applicable only in WB-S1 mode. If received in NB-S1 mode it is interpreted as if the Extended DRX parameters IE were not included in the message by this version of the protocol.
2 The value is applicable only in WB-S1 mode. If received in NB-S1 mode it is interpreted as 0010 by this version of the protocol.
3 The value is applicable only in NB-S1 mode. If received in WB-S1 mode it is interpreted as 1101 by this version of the protocol.