Section: 8.125 CIoT Optimizations Support Indication
Content: CIoT Optimizations Support Indication is coded as depicted in Figure 8.125-1 below. Figure 8.125-1: CIoT Optimizations Support Indication Octet 5 carries the feature support bits for each of the CIoT optimization as follows: - Bit 8 to Bit 5: Spare, for future use and set to 0. - Bit 4 – IHCSI (IP Header Compression Support Indication): Indicates the support of IP header compression based on ROHC framework (see IETF RFC 4995 [77]) for Control Plane CIoT EPS optimisations, when set to '1'. - Bit 3 – AWOPDN (Attach without PDN Support Indication): Indicates the support of Attach without PDN connection as specified in clause 4.3.5.10 of 3GPP TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [3], when set to '1'. Here the word "PDN connection" implies both the PDN connection through SGW and PGW and the PDN connection through SCEF. - Bit 2 – SCNIPDN (SCEF Non IP PDN Support Indication): Indicates the support of SCEF Non IP PDN Connection as specified in clause 5.13.1 of 3GPP TS 23.682[ Architecture enhancements to facilitate communications with packet data networks and applications ]  [74], when set to '1'. - Bit 1 – SGNIPDN (SGi Non IP PDN Support Indication): Indicates the support of SGi Non IP PDN Connection as specified in clause 4.3.17.8.3.3 of 3GPP TS 23.401[ General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access ]  [3] and 3GPP TS 23.060[ General Packet Radio Service (GPRS); Service description; Stage 2 ]  [35], when set to '1'.