For the purposes of the present document, the terms and definitions given in TR 21.905
and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905
Open ProSe Discovery:
is ProSe Discovery without explicit permission from the UE being discovered.
ProSe Application Identity:
An identity identifying application related information for the ProSe enabled UE. There can exist more than one ProSe Application Identities per UE.
ProSe Application Key:
A key associated with a ProSe Application Identity, meant to be used for restricted discovery.
A process that identifies that a ProSe-enabled UE is in proximity of another, using E-UTRA (with or without E-UTRAN) or EPC.
ProSe Direct Discovery:
A procedure employed by a ProSe-enabled UE to discover other ProSe-enabled UEs in its vicinity by using only the capabilities of the two UEs with Rel-12 E-UTRA technology.
EPC-level ProSe Discovery:
A process by which the EPC determines the proximity of two ProSe-enabled UEs and informs them of their proximity.
ProSe UE-to-Network Relay:
is a form of relay in which a Public Safety ProSe-enabled UE acts as a ProSe E-UTRA communication relay between a Public Safety ProSe-enabled UE and the ProSe-enabled network using E-UTRA.
ProSe UE-to-UE Relay:
is a form of relay in which a Public Safety ProSe-enabled UE acts as a ProSe E-UTRA Communication relay between two other Public Safety ProSe-enabled UEs.
An UE that fulfils ProSe requirements for ProSe Discovery and/or ProSe Communication. Unless explicitly stated otherwise, a ProSe-enabled UE refers to any ProSe-enabled UE (I.e. Public Safety or not).
A network that supports ProSe Discovery and/or ProSe Communication. Unless explicitly stated otherwise in the present document, a network refers to a ProSe-enabled Network.
ProSe Broadcast Communication:
A communication between two or more ProSe-enabled UEs in proximity by means of a ProSe Communication path. Unless explicitly stated otherwise, the term "ProSe Communication" refers to any/all of the following:
ProSe E-UTRA Communication between only two ProSe-enabled UEs; or
ProSe Group Communication or ProSe Broadcast Communication among Public Safety ProSe-enabled UEs; or
ProSe-assisted WLAN direct communication.
An One-to-all ProSe E-UTRA Communication, between all authorized Public Safety ProSe-enabled UEs in proximity, by means of a common ProSe E-UTRA Communication path established between these UEs.
ProSe Group Communication:
An One-to-many ProSe E-UTRA Communication, between more than two Public Safety ProSe-enabled UEs in proximity, by means of a common ProSe E-UTRA Communication path established between the Public Safety ProSe-enabled UEs.
ProSe UE Identity:
An unique identity allocated by EPS which identifies the ProSe enabled UE. It can be assigned to a UE at any moment in time for a configurable duration, can be stored at the UE, but its value cannot be assigned by the user, and is subject to operator assignment and re-assignment.
is determined ("a UE is in proximity of another UE") when given proximity criteria are fulfilled. Proximity criteria can be different for discovery and communication.
Restricted ProSe Discovery:
A ProSe Discovery that only takes place with explicit permission from the UE being discovered.
EPC ProSe User ID:
An identifier for EPC-level ProSe Discovery and EPC support for WLAN direct communication that uniquely identifies a UE registered for ProSe. This identifier can be occasionally reassigned by the ProSe Function.
A ProSe-enabled Public Safety UE, that is not served by E-UTRAN, and that communicates with a PDN via a ProSe UE-to-Network Relay.
For the purposes of the present document, the abbreviations given in TR 21.905
and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905