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full Table of Contents for  TS 23.003  Word version:   16.1.0

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28  Numbering, addressing and identification for 5G System (5GS) [R15]Word-p. 105
28.1  Introduction
28.2  Home Network DomainUp
→  "5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org"
28.3  Identifiers for Domain Name System proceduresWord-p. 106
28.3.1  Introduction
28.3.2  Fully Qualified Domain Names (FQDNs)
28.3.2.1  General
28.3.2.2  N3IWF FQDN
28.3.2.2.1  General
28.3.2.2.2  Operator Identifier based N3IWF FQDN
→  "n3iwf.5gc.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org"
28.3.2.2.3  Tracking Area Identity based N3IWF FQDNWord-p. 107
→  for 2-byte TAC:
"tac-lb<TAC-low-byte>.tac-hb<TAC-high-byte>.tac.n3iwf.5gc.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org"
→  for 3-byte TAC (5GS TAI):
"tac-lb<TAC-low-byte>.tac-mb<TAC-middle-byte>.tac-hb<TAC-highbyte>.5gstac.n3iwf.5gc.mnc<MNC>.mcc<MCC>.pub.3gppnetwork.org"
28.3.2.2.4  Visited Country FQDN for N3IWFWord-p. 108
→  "n3iwf.5gc.mcc<MCC>.visited-country.pub.3gppnetwork.org"
28.3.2.2.5  Replacement field used in DNS-based Discovery of regulatory requirementsUp
28.3.2.3  PLMN level and Home NF Repository Function (NRF) FQDN
28.3.2.3.1  General
28.3.2.3.2  Format of NRF FQDN
→  "nrf.5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org"
28.3.2.3.3  NRF URIWord-p. 109
28.3.2.4  Network Slice Selection Function (NSSF) FQDN
28.3.2.4.1  General
28.3.2.4.2  Format of NSSF FQDN
→  "nssf.5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org"
28.3.2.4.3  NSSF URI
28.3.2.5  AMF NameWord-p. 110
→  "<AMF-id>.amf.5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org"
28.3.2.6  5GS Tracking Area Identity (TAI) FQDNUp
→  "tac-lb<TAC-low-byte>.tac-mb<TAC-middle-byte>.tac-hb<TAC-high-byte>.5gstac.5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org"
28.3.2.7  AMF Set FQDNWord-p. 111
→  "set<AMF Set Id>.region<AMF Region Id>.amfset.5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org"
28.3.2.8  AMF Instance FQDN
→  "pt<AMF Pointer>.set<AMF Set Id>.region<AMF Region Id>.amfi.5gc.mnc<MNC>.mcc<MCC>.3gppnetwork.org"
28.3.2.9  SMF Set FQDNWord-p. 112
28.4  Information for Network SlicingWord-p. 113
28.5  NF FQDN Format for Inter PLMN Routing
28.6  5GS Tracking Area Identity (TAI)Word-p. 114
3GPP Identifier: 5GS-TAI (5GS Tracking Area Identity)
28.7  Network Access Identifier (NAI)
→  defined in RFC 7542Section 2.2  (either of: "username", "@realm", "username@realm")
28.7.1  Introduction
28.7.2  NAI format for SUPIWord-p. 115
→  of the form: "username@realm"
28.7.3  NAI format for SUCI
→  of the form: "username"
→  for the null-scheme:
"type<supi type>.rid<routing indicator>.schid<protection scheme id>.userid<MSIN or Network Specific Identifier SUPI username>"
→  for the Scheme Output for Elliptic Curve Integrated Encryption Scheme Profile A and Profile B:
"type<supi type>.rid<routing indicator>.schid<protection scheme id>.hnkey<home network public key id>.ecckey<ECC ephemeral public key value>.cip<ciphertext value>.mac<MAC tag value>"
→  for HPLMN proprietary protection schemes:
"type<supi type>.rid<routing indicator>.schid<protection scheme id>.hnkey<home network public key id>.out<HPLMN defined scheme output>"
28.7.4  Emergency NAI for Limited Service State
→  "imei<IMEI>@sos.invalid"
→  "mac<MAC>@sos.invalid" (if IMEI is not available)
28.7.5  Alternative NAIWord-p. 116
→  "<any_non_null_string>@unreachable.3gppnetwork.org"
28.7.6  NAI used for 5G registration via trusted non-3GPP access [R16]
28.7.7  NAI used by N5CW devices via trusted non-3GPP access [R16]
28.8  Generic Public Subscription Identifier (GPSI)Word-p. 117
28.9  Internal-Group IdentifierUp
28.10  Presence Reporting Area Identifier (PRA ID)
28.11  CAG-IdentifierWord-p. 118
28.12  NF Set Identifier (NF Set ID)
28.13  NF Service Set Identifier (NF Service Set ID)Word-p. 119
28.14  Data Network Access Identifier (DNAI) [R16]
28.15  Global Cable Identifier (GCI) [R16]
28.16  Global Line Identifier (GLI) [R16]Up
29  Numbering, addressing and identification for RACS [R15]

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