8.18 Secondary RAT Data Usage Report
36.4133GPPEvolved Universal Terrestrial Radio Access Network (E-UTRAN)Release 17S1 Application Protocol (S1AP)TS
8.18.1 General
The purpose of the Secondary RAT Data Usage Report procedure is to provides information on the used resources of the secondary RAT (e.g. NR resources during EN-DC operation) as specified in TS 23.401 [11].
8.18.2 Successful Operations
8.18.2.1 SECONDARY RAT DATA USAGE REPORT
Figure 8.18.2.1-1: Secondary RAT Data Usage Report Procedure
The eNB initiates the procedure by sending the SECONDARY RAT DATA USAGE REPORT message to MME.
If the PSCell Information IE is included in the SECONDARY RAT DATA USAGE REPORT message, then the MME may use it to determine the UE’s location.
If the Time Since Secondary Node Release IE is included in the SECONDARY RAT DATA USAGE REPORT message, it indicates the time elapsed since EN-DC operation in the eNB was stopped for the UE.
8.18.3 Unsuccessful Operation
Not applicable
8.18.4 Abnormal Conditions
Not applicable