8.9 UE Capability Info Indication

36.4133GPPEvolved Universal Terrestrial Radio Access Network (E-UTRAN)Release 17S1 Application Protocol (S1AP)TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

8.9.1 General

The purpose of the UE Capability Info Indication procedure is to enable the eNB to provide to the MME UE capability-related information.

8.9.2 Successful Operation

Figure 8.9.2-1: UE Capability Info Indication procedure. Successful operation.

The eNB controlling a UE-associated logical S1-connection initiates the procedure by sending a UE CAPABILITY INFO INDICATION message to the MME including the UE capability information. The UE CAPABILITY INFO INDICATION message may also include paging specific UE capability information within the UE Radio Capability for Paging IE. The UE capability information received by the MME shall replace previously stored corresponding UE capability information in the MME for the UE, as described in TS 23.401 [11].

If UE CAPABILITY INFO INDICATION message contains the LTE-M indication IE, the MME shall, if supported, store this information in the UE context and use it according to TS 23.401 [11].

If the UE indicates the support for UE Application Layer Measurement, the eNB shall if supported include the UE Application Layer Measurement Capability IE in the UE CAPABILITY INFO INDICATION message. The MME shall, if supported, store and use this information when initiating UE Application Layer Measurement.

If UE CAPABILITY INFO INDICATION message contains the UE Radio Capability – NR Format IE, the MME shall, if supported, use it according to TS 23.401 [11].

If the UE RADIO CAPABILITY INFO INDICATION message includes the UE Radio Capability for Paging IE and the UE Radio Capability for Paging – NR Format IE, the MME shall, if supported, use it according to TS 23.401 [11].

8.9.3 Abnormal Conditions

If the UE RADIO CAPABILITY INFO INDICATION message includes the UE Radio Capability for Paging – NR Format IE without the UE Radio Capability for Paging IE, the MME shall consider it as a logical error and act as described in subclause 10.4.