TS 23.251 ★
Network Sharing –
Architecture and Functional Description

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V16.0.0 (PDF) 2020/06 41 p.

V15.1.0 2018/09 41 p.

V14.1.0 2017/09 41 p.

V13.2.0 2016/06 41 p.

V12.1.0 2014/06 37 p.

V11.6.0 2013/12 36 p.

V10.6.0 2013/06 29 p.

V9.5.0 2012/12 22 p.

V8.4.0 2012/12 22 p.

V7.0.0 2007/06 20 p.

V6.6.0 2006/03 20 p.

Rapporteur:: Dr. Nilsson, Ulf TeliaSonera AB

essential Table of Contents for TS 23.251 Word version: 16.0.0

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

2 References Word‑p. 6

3 Definitions and abbreviations Word‑p. 7

4 General Description Word‑p. 8

4.1 Overview Word‑p. 8

4.2 Core Network Operator and Network Selection Word‑p. 9

4.2.1 Core network operator identity Word‑p. 9

4.2.2 Broadcast system information for network sharing Word‑p. 10

4.2.3 Network selection in a shared network Word‑p. 10

4.2.4 Assignment of core network operator and core network node Word‑p. 10

4.2.5 PS and CS domain registration coordination in UTRAN and GERAN Word‑p. 11

4.2.5a PS and CS domain registration coordination in E-UTRAN |R8| Word‑p. 11

4.2.6 Attach/detach handling Word‑p. 13

4.3 Network Name Display for Supporting UEs Word‑p. 13

4.4 HPLMN Support Word‑p. 13

4.5 Support of Cell Broadcast Services and Warning System |R10| Word‑p. 14

4.6 Support of Extended Access Barring |R11| Word‑p. 14

4.7 Support of service identification for improved radio utilization for GERAN |R11| Word‑p. 14

5 Functional description Word‑p. 14

5.1 UE functions Word‑p. 14

5.2 RNC functions Word‑p. 14

5.2a eNodeB functions |R8| Word‑p. 15

5.2b BSC functions |R8| Word‑p. 16

5.3 MSC functions Word‑p. 17

5.4 SGSN functions Word‑p. 18

5.5 MME functions |R8| Word‑p. 19

6 Charging and accounting aspects Word‑p. 20

7 Example signalling flows Word‑p. 20

7.1 Network selection Word‑p. 20

7.1.2 Non-supporting UEs in a GWCN configuration Word‑p. 20

7.1.3 Supporting UEs in a GWCN configuration Word‑p. 22

7.1.4 Non-supporting UEs in a MOCN configuration Word‑p. 22

7.1.5 Supporting UEs in a MOCN configuration Word‑p. 30

7.1.6 Query to opposite domain |R13| Word‑p. 32

A Network Resource Indicator (NRI) allocation examples Word‑p. 33

A.1 NRI in shared UTRAN/GERAN networks Word‑p. 33

A.2 Alternatives for NRI split in UTRAN and GERAN Word‑p. 34

A.3 NRI and CS/PS coordination in GWCN |R11| Word‑p. 35

A.4 CSPS Coordination |R13| Word‑p. 35

B (Normative) Interaction with other network capabilities |R10| Word‑p. 38

$ Change history Word‑p. 39

TS 23.251 ★ Network Sharing – Architecture and Functional Description

essential Table of Contents for TS 23.251 Word version: 16.0.0

TS 23.251 ★
Network Sharing –
Architecture and Functional Description