5.31.7.2.3 Paging for a UE registered in a tracking area with heterogeneous support of extended idle mode DRX

When the UE is registered in a registration area with heterogeneous support of extended idle mode DRX (e.g. comprising WB-E-UTRA and NR cells) and has negotiated eDRX, the AMF shall, for any paging procedure, perform at least one paging attempt during a PTW.

NOTE: Heterogeneous support of extended idle mode DRX in tracking areas assigned by AMF in a TAI list can result in significant battery life reduction in the UE as compared to homogeneous support by NG-RAN nodes of extended idle mode DRX.