Content for  TR 23.700-40  Word version:  17.0.0

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1  Scopep. 12

GSMA 5GJA has introduced in document NG.116 [3] the concept of Generic Network Slice Template (GST) from which several Network Slice Types (NESTs) can be derived by assigning values to applicable attributes defined in the GST.
This study aims at identifying the gaps that need to be filled in providing support in the specifications owned by SA WG2 for the Generic Network Slice Template (GST) attributes.

2  Referencesp. 12

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.
TR 21.905: "Vocabulary for 3GPP Specifications".
TS 23.501: "System Architecture for the 5G System (5GS); Stage 2".
GSMA 5GJA NG.116: "Generic Network Slice Template".
TS 28.554: "Management and orchestration; 5G end to end Key Performance Indicators (KPI)".
TS 23.288: "Architecture enhancements for 5G System (5GS) to support network data analytics services; Stage 2".
TS 23.502: "Procedures for the 5G System; Stage 2".
TS 28.552: "Management and orchestration; 5G performance measurements".
TR 23.740: "Study on enhancement of network slicing".
TS 32.255: "Telecommunication management; Charging management; 5G Data connectivity domain charging; stage 2".
TS 32.256: "Telecommunication management; Charging management; 5G connection and mobility domain charging; stage 2".
TS 28.202: "Charging management; Network slice management charging in the 5G System (5GS); Stage 2".
TS 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".

3  Definitions of terms and abbreviationsp. 12

3.1  Termsp. 12

For the purposes of the present document, the terms given in TR 21.905 apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.

3.2  Abbreviationsp. 13

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.
Generic Network Slice Template
Network Slice Type

4  Architectural Assumptions and Requirementsp. 13

4.1  Architecture Assumptionsp. 13

The following architectural assumptions apply:
  • A NEST is applied to a Network Slice even when supported by multiple Network Slice instances.
  • It is not in the scope of this study to define a new Control Plane interface for the BSS domain.
  • It is assumed that the UE context in the AMFs and data stored in NFs involved with counting is kept in highly reliable storage that is robust to NF failure.

4.2  Architectural Requirementsp. 13

The following architectural requirements apply:
  • Solutions shall build on the 5G System architectural principles as in TS 23.501, including flexibility and modularity for newly introduced functionalities.
  • Subject to operator policy and national/regional regulations, solutions shall be able to exempt Emergency services, Multimedia Priority Service, and Mission Critical Service from quota limits.
  • While the support of network slicing applies only to 5GS, solutions supports subscriptions that allows EPS/5GS interworking. Therefore EPS/5GS interworking needs to be considered for the enforcement of quotas for maximum number of UEs per network slice and for maximum number of PDU Sessions per network slice.

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