The present document specifies the protocols for Proximity-based Services (ProSe) between:
the ProSe-enabled UE and the ProSe Function (over the PC3 interface); and
two ProSe-enabled UEs (over the PC5 interface).
The present document defines the associated procedures for ProSe service authorisation, ProSe direct discovery, EPC-level ProSe discovery, and EPC support for WLAN direct discovery and communication.
The present document also defines the message format, message contents, error handling and system parameters applied by the protocols for ProSe.
The present document is applicable to:
the ProSe-enabled UE; and
the ProSe Function.