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
set to minimum functionality mode with the +CFUN=0
command.
Active %XPOFWARN warning blocks the storing to NVM.v1.3.x≥2When an eDRX parameter
is changed, the default Paging Time Window (PTW) is set. If the default PTW is not
used, the %XPTW command must be sent after the
+CEDRXS command.
To ensure a proper amount of paging occasions
and time for reception with all possible DRX cycle lengths, it is recommended to set the PTW
length to ≥5.12 s for
LTE-M and to ≥10.24 s for
Narrowband Internet of Things (NB-IoT) when possible.
Note: Use a
shorter PTW length than the eDRX length provided by the network.
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>
- 0 – Current cell is not using eDRX. Used only in the unsolicited result code.v1.3.x≥4
- 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 s1
0 0 0 1 – 10.24 s1
0 0 1 0 – 20.48 s
0 0 1 1 – 40.96 s
0
1 0 0 – 61.44 s2
0 1 0 1 – 81.92
s
0 1 1 0 – 102.4 s2
0 1 1 1 –
122.88 s2
1 0 0 0 – 143.36 s2
1 0 0 1 – 163.84 s
1 0 1 0 –
327.68 s
1 0 1 1 – 655,36 s
1 1 0 0 – 1310.72 s
1 1 0 1 – 2621.44
s
1 1 1 0 – 5242.88 s3
1 1 1 1
– 10485.76 s3
- <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 s1
0 0 0 1 – 10.24 s1
0 0 1 0 – 20.48 s
0 0 1 1 – 40.96 s
0
1 0 0 – 61.44 s2
0 1 0 1 – 81.92
s
0 1 1 0 – 102.4 s2
0 1 1 1 –
122.88 s2
1 0 0 0 – 143.36 s2
1 0 0 1 – 163.84 s
1 0 1 0 –
327.68 s
1 0 1 1 – 655,36 s
1 1 0 0 – 1310.72 s
1 1 0 1 – 2621.44
s
1 1 1 0 – 5242.88 s3
1 1 1 1
– 10485.76 s3
- <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 s
0 0 0 1 – 2.56 s
0 0 1 0 – 3.84
s
0 0 1 1 – 5.12 s
0 1 0 0 – 6.4 s
0 1 0 1 – 7.68 s
0 1 1 0 –
8.96 s
0 1 1 1 – 10.24 s
1 0 0 0 – 11.52 s
1 0 0 1 – 12.8 s
1
0 1 0 – 14.08 s
1 0 1 1 – 15.36 s
1 1 0 0 – 16.64 s
1 1 0 1 – 17.92
s
1 1 1 0 – 19.20 s
1 1 1 1 – 20.48 s
- NB-IoT mode
- Bit
- 4 3 2 1 – PTW length
0 0 0 0 – 2.56 s
0 0 0 1 – 5.12 s
0 0 1 0 – 7.68
s
0 0 1 1 – 10.24 s
0 1 0 0 – 12.8 s
0 1 0 1 – 15.36 s
0 1 1 0
– 17.92 s
0 1 1 1 – 20.48 s
1 0 0 0 – 23.04 s
1 0 0 1 – 25.6
s
1 0 1 0 – 28.16 s
1 0 1 1 – 30.72 s
1 1 0 0 – 33.28 s
1 1 0
1 – 35.84 s
1 1 1 0 – 38.4 s
1 1 1 1 – 40.96 s
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