TR 23.737 ★
Study on Architecture aspects
for using Satellite Access in 5G

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V17.1.0 (Wzip) 2020/06 92 p.

Rapporteur:: Mr. Rognant, Pierre THALES

essential Table of Contents for TR 23.737 Word version: 17.1.0

each title, in the ┃ or ┃ area, links to the equivalent title in the CONTENT

2 References Word‑p. 8

3 Definitions, symbols and abbreviations Word‑p. 8

4 Reference Satellite Integration Scenarios and Architectural Assumptions Word‑p. 9

4.1 Satellite access class scenarios Word‑p. 9

4.1.1 Satellite and terrestrial access networks within a PLMN Word‑p. 9

4.1.2 PLMNs with shared satellite access Word‑p. 10

4.1.3 Roaming and mobility between satellite only PLMN and terrestrial only PLMN Word‑p. 11

4.2 Satellite backhaul scenario Word‑p. 11

4.3 Architectural assumptions Word‑p. 11

5 Key Issues Word‑p. 12

5.1 Key Issue #1: Mobility management with large satellite coverage areas Word‑p. 12

5.2 Key Issue #2: Mobility Management with moving satellite coverage areas Word‑p. 12

5.3 Key Issue #3: Delay in satellite Word‑p. 13

5.4 Key Issue #4: QoS with satellite access Word‑p. 13

5.5 Key Issue #5: QoS with satellite backhaul Word‑p. 13

5.6 Key Issue #6: RAN mobility with NGSO regenerative-based satellite access Word‑p. 14

5.7 Key Issue #7: Multi connectivity with satellite access Word‑p. 14

5.8 Key Issue #8: The role of satellite link in content distribution towards the edge Word‑p. 15

5.9 Key Issue #9: Multi connectivity with hybrid satellite/terrestrial backhaul Word‑p. 16

5.10 Key Issue #10: Regulatory services with super-national satellite ground station Word‑p. 17

6 Solutions Word‑p. 18

6.1 Solution #1: Position-based and fixed TA Satellite Access Word‑p. 18

6.2 Solution #2: Addition of new values to RAT type IE Word‑p. 21

6.3 Solution #3: Backhaul triggered QoS adaptation Word‑p. 24

6.4 Solution #4: Support of UP path switch between SAT RAN and TER RAN Word‑p. 28

6.5 Solution #5: QoS control for satellite backhaul scenario Word‑p. 30

6.6 Solution #6: Role of satellite backhaul in content distribution towards the edge Word‑p. 32

6.7 Solution #7: Idle mode mobility procedure for non-geostationary satellite access Word‑p. 34

6.8 Solution #8: 5GS enhancement to support gNBs on NGSO satellites Word‑p. 38

6.9 Solution #9: Distributed gNB for NGSO satellites Word‑p. 40

6.10 Solution #10: Addressing delay in satellite Word‑p. 42

6.11 Solution #11: Backhaul QoS handling based on AMF and UPF information Word‑p. 45

6.12 Solution #12: Satellite cells for 5G satellite access Word‑p. 53

6.13 Solution #13: Country specific PLMN selection Word‑p. 70

6.14 Solution #14: Mobility and QoS with Satellite Access Word‑p. 74

7 Overall evaluation Word‑p. 75

8 Conclusions Word‑p. 82

A Characteristics of satellite systems Word‑p. 85

A.1 General Word‑p. 85

A.2 Class of orbit Word‑p. 85

A.3 Geometrical coverage of satellite and propagation delay Word‑p. 86

A.4 Type of satellite communication payloads Word‑p. 87

A.5 Handovers Word‑p. 88

A.6 Air interfaces Word‑p. 88

A.7 General considerations on the use of satellite networks Word‑p. 88

B Architecture Models for Satellite Integration in 5GS Word‑p. 89

$ Change history Word‑p. 92

TR 23.737 ★ Study on Architecture aspects for using Satellite Access in 5G

essential Table of Contents for TR 23.737 Word version: 17.1.0

TR 23.737 ★
Study on Architecture aspects
for using Satellite Access in 5G