3GPP 24.501 v20.0.0 — the document's own text
8.2.7.27 Negotiated extended DRX parameters
Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).
The network shall include the Negotiated extended DRX parameters IE if:
- the UE included the Requested extended DRX parameters IE in the REGISTRATION REQUEST message; and
- the network supports eDRX and accepts the use of eDRX.