3 Definitions, symbols and abbreviations

29.3033GPPDomain Name System ProceduresRelease 17Stage 3TS

3.1 Definitions

For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP TR 21.905 [1].

Domain Name System as defined in IETF RFC 1034 [2], IETF RFC 1035[3], and as used in 3GPP in 3GPP TS 23.003 [4] and GSMA PRD IR.67 [5]

The phrase "operators shall provision" in this document is intended to convey what is required to provision in DNS to provide DNS based selection for the corresponding function documented here. If there is a non-DNS procedure in an operator’s network for that function then there is no functional requirement for the operator to provision such DNS records.

The term "S4-SGSN" refers to a Release-8 SGSN that has at least one set of S4/S3/S16 interfaces enabled.

The term "Release 8 SGSN supporting only Gn/Gp" refers to a Release 8 or later SGSN that either explicitly does not support S4 interfaces or all S4/S3/S16 interfaces are disabled due to operator policy. Such a node cannot use an SGW but can use a collocated PGW/GGSN. See 3GPP TS 23.401 [11] Annex D for use cases.

The term "Release-8 SGSN" applies to either case.

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in 3GPP TR 21.905[1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in 3GPP TR 21.905 [1].

DCN Dedicated Core Network

DDDS Dynamic Delegation Discovery Service

DNS Domain Name System

ECGI E-UTRAN Cell Global Identification

eHRPD evolved High Rate Packet Data

FQDN Fully Qualified Domain Name

GUTI Globally Unique Temporary Identity

HSGW eHRPD Serving Gateway

LGW Local Gateway

LIPA Local IP Access

NR New Radio

PGW PDN Gateway

RAI Routing Area Identity

SGW Serving Gateway

SIPTO Selected IP Traffic Offload

TAI Tracking Area Identity

TAU Tracking Area Update

TWAN Trusted WLAN Access Network