In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the indication of the slice identifier is transmitted in at least one of a non-access stratum (NAS) message over the sidelink interface, a radio resource control (RRC) message to a UE, an RRC message to a base station, a header of a D2D communication, or a combination thereof. In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the slice identifier is determined based at least in part on a data structure that maps different slice identifiers to corresponding service type identifiers. In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the service type is represented using at least one of an upper layer identifier, a provider service identifier (PSID), an intelligent transport system application identifier (ITS-AID), or a combination thereof. In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the service type is represented by an identifier that is not readable at an access stratum layer, and wherein the slice identifier is readable at the access stratum layer.