How to enable PSM and eDRX ?

For CAT-M network configuration

Activate both features in mme.cfg configuration file:

1. Set "psm" parameter to true (which is the default value)
2. Set "edrx" parameter to true (which is the default value)

Activate edrx in enb.cfg configuration file:

1. Set "edrx"" parameter to true .

In mme.cfg file, other optional parameters can be used for configuring the PSM and EDRX values and force t3412 timer value or Paging time window (PTW) as instance :

1. Set "t3412_extended_forced: x," (where X is the T3412 value in seconds)
2. Set "edrx_ptw_wb_s1: 2,"

For more details, please refer to ltemme.pdf and lteenb.pdf

For NB-IoT network configuration

For NB-IOT, only the mme.cfg file has to be configured. Same parameters as for CAT-M have to be set:

1. Set "psm" parameter to true (which is the default value)
2. Set "edrx" parameter to true (which is the default value)

Additional parameters such as t3412_extended_forced, edrx_ptw_wb_s1, force_t3412_extended_ie , etc.. can also be set for forcing values .

For more details, please refer to ltemme.pdf and lteenb.pdf