eDRX enabled but no observable reduction in power consumption

[Bhumi]

Hello Nordic team,

We are using an nRF5340 as the host processor, and an nRF9160 module is mounted on top of it.
All LTE modem AT commands are sent from nRF5340 to nRF9160.

We have enabled eDRX mode on the nRF9160, and the device is entering reduced power mode successfully.

eDRX Configuration:

The following AT command is sent to enable eDRX:

AT+CEDRXS=1,4,"0001"

The network negotiates and responds with:

+CEDRXS: 4,"0001","001","0001"

OK

From this response, we understand that:

• LTE‑M eDRX is accepted by the network
• The requested eDRX value is successfully negotiated

Observed Behavior

• After enabling eDRX, we can see a clear difference in the current waveform pattern
• The RF spike frequency is reduced, and the device is clearly entering reduced power mode
• So functionally, eDRX appears to be working

However:

• The average current consumption remains almost the same
• Measured current is approximately ~110 µA
  • Before enabling eDRX
  • After enabling eDRX
• No noticeable reduction in average power consumption is observed

Measurement Setup

• Power is measured at the supply side
• Energy harvesting circuit is enabled
• Battery is also connected

Questions

1. Is it expected that eDRX mainly changes the current pattern (paging cycle) but does not significantly reduce the average current, especially when PSM is not enabled?  

Power consumption Measurement:

 

[Bhumi]

+CEDRXS: 4,"0001","0001","0001"

OK 

Please note that there is a typing mistake in the above network‑negotiated settings.