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Content for  TR 24.821  Word version:  17.0.0

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1  Scopep. 7

This technical report studies the key issues and the respective solutions related to the support for network selection procedure that accommodates 5G systems using satellite radio access networks. The objective is to:
  • identify the specifics of the satellite access networks with respect to the legacy 3GPP access networks that are relevant to the PLMN selection procedure; and
  • consider the need to modify the legacy PLMN selection procedure to address the identified specifics.

2  Referencesp. 7

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 24.501: "Non-Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
TS 23.122: "Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode".
TS 23.501: "System architecture for the 5G System (5GS); Stage 2"
TR 23.737: "Study on architecture aspects for using satellite access in 5G".
ITU-T E.212 The international identification plan for public networks and subscriptions (09/2016).
ITU RR-2020-00013-Vol.1-EA5 Radio Regulations, Edition of 2020
S3i200056 Response LS on the "LS OUT on Location of UEs and associated key issues"
TS 31.102: "Characteristics of the USIM Application"
TS 24.368: "Non-Access Stratum (NAS) configuration Management Object (MO)"
TS 22.011: "Service accessibility"
TS 22.261: "Service requirements for the 5G system"
S3i210129 Reply LS on selecting a PLMN not allowed in the country where a UE is physically located

3  Definitions of terms, symbols and abbreviationsp. 8

3.1  Termsp. 8

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.
3GPP satellite access:
access network using satellite-mounted transmitters and one of the following RAT types: NR(LEO), NR(MEO), NR(GEO) and NR(OTHERSAT). 3GPP satellite access is considered a 3GPP access.
International areas:
geographical areas, international waters and international airspace that are not under the jurisdiction of any country.

3.2  Symbolsp. 8


3.3  Abbreviationsp. 8

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.
non-terrestrial network
public landline mobile network
PLMN identity
terrestrial network

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