The present document provides a summary of each and every 3GPP Release 15 Feature, and more generally of all Work Items for which a summary has been agreed to be provided.
These summaries are based on the inputs issued by the Work Item Rapporteurs, slightly rewritten by the TR Rapporteur to ensure overall consistency. The original Work Item Rapporteur inputs can be retrieved as temporary document (tdoc), as stated in the first sentence of each clause.
The present document provides a summary of each Release 15 Feature or, whenever needed, of each significant Work Item.
The information provided in the present document is limited to an overview of each Feature, explaining briefly its purpose and the main lines of the system's behaviour to execute the Feature.
More information is available by consulting the 3GPP Ultimate web site, as explained in "Annex C: Process to get further information".
The present document presents the "initial state" of the Features introduced in Release 15, i.e. as they are by the time of publication of the present document. Each Feature is subject to be later modified or enhanced, over several years, by the means of Change Requests (CRs). It is therefore recommended to retrieve all the CRs which relate to the given Feature, as explained in Annex C, to further outline a feature at a given time.
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
For a specific reference, subsequent revisions do not apply.
For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
For the purposes of the present document, the terms 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.
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. Abbreviations specific to a given clause are provided in the clause they appear.
3GPP main area of work in Release 15 is the definition of the initial phase of 5G, the Fifth Generation of Mobile Communications, also referred to as "5GS" ("the 5G System").
5G is to be defined in at least 2 phases, the phase 1 being specified in Release 15, as summarised in the present document. Subsequent phase(s) will be specified in future Release(s).
Beside 5G Phase 1, Release 15 also specifies, among other Features: further enhancements on Critical Communications (including Ultra Reliable Low Latency Communication and Highly Reliable Low Latency Communication), Machine-Type of Communications (MTC) and Internet of Things (IoT), Vehicle-related Communications (V2X), Mission Critical (MC), and features related to WLAN and unlicensed spectrum.
The continuation of the present document provides an exhaustive view of all the items specified in Release 15 by 3GPP.