Mission critical services support in the Isolated Operation for Public Safety (IOPS) mode of operation
This document specifies the functional architecture, procedures and information flows needed to support mission critical services in the IOPS mode of operation. IOPS mode of operation allows an isolated 3GPP network to maintain a level of MC services in case the backhaul connection is lost. For example, for EPS the IOPS mode of operation is defined in 3GPP TS 23.401 [2].
The corresponding service requirements are defined in 3GPP TS 22.346 [9] and 3GPP TS 22.280 [11].
The present document is applicable to support mission critical services in the IOPS mode of operation for 3GPP access types, such as E-UTRAN or 5G.
The functional architecture to support mission critical services in the IOPS mode of operation can be used for public safety applications and also for general commercial applications, e.g. utility companies and railways, for the case of a backhaul failure.