Content for TR 23.700-27 Word version: 18.0.0
1 Scope
2 References
3 Definitions of terms, symbols and abbreviations
4 Architecture Assumptions
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1 Scope p. 7
The scope of this Technical Report is to study the following aspects of 5GS with satellite backhaul:
-
Architecture enhancements for support of a backhaul with changing delay (e.g. brought by ISL in satellite networks or changed satellite backhaul on the UP path), and possibly limited bandwidth in case of a gNB with satellite backhaul only (e.g. restricted by the maximum data rate of a satellite beam):
- Policy/QoS control enhancements based on the detected packet delivery latency and/or bandwidth of the satellite backhaul on the UP path;
- Exposure of backhaul information to AFs.
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Architecture enhancements for support of UPF deployed on GEO satellite with gNB on the ground:
- Whether and how to enable satellite edge computing services via UPF on-board e.g. to reduce the latency for data transmission, and minimize the backhaul resources consumption.
- How to enhance local switch for UEs in a communication when they are served by UPF on-board, e.g. to reduce end to end delay comparing with existing 5G LAN local switch at PSA on the ground.
2 References p. 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.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
TS 23.501: "System Architecture for the 5G System; Stage 2".
[3]
TS 23.502: "Procedures for the 5G system, Stage 2".
[4]
TS 23.503: "Policy and Charging Control Framework for the 5G System".
[5]
TR 23.737: "Study on architecture aspects for using satellite access in 5G".
[6]
TS 23.548: "5G System Enhancements for Edge Computing; Stage 2".
3 Definitions of terms, symbols and abbreviations p. 7
3.1 Terms p. 7
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.
3.2 Abbreviations p. 8
4 Architecture Assumptions p. 8
The 5GS architecture specified in TS 23.501, TS 23.502 and TS 23.503 is used as a baseline.
The following architectural assumptions are applied to the study:
- At least UP backhaul connection of a gNB is over satellite link.
- If available bandwidth information is needed in dynamic satellite backhaul link cases, the bandwidth detection is performed by the transport network layer.
