TS 23.251
SA2
★
Network Sharing –
Architecture and Functional Description
use "3GPP‑Page" to get the Word version
use "ETSI‑search" to get the PDF version
for a better overview, the Table of Contents (ToC) is reproduced
use "ETSI‑search" to get the PDF version
for a better overview, the Table of Contents (ToC) is reproduced
V15.1.0 (PDF)
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
Network sharing is a way for operators to share the heavy deployment costs for mobile networks, especially in the roll-out phase. In the current mobile telephony marketplace, functionality that enables various forms of network sharing is becoming more and more important. These aspects have not really been addressed before Release 6 in 3GPP UTRAN based access networks, before Release 8 in 3GPP E-UTRAN based access networks and before Release 10 in 3GPP GERAN based access networks, although there has been functionality that supports a very basic type of network sharing since the Release 5 versions of the 3GPP specifications.
The present document covers the details of Network Sharing for GERAN, UTRAN and E-UTRAN. It shows how
several core network operators can share one radio access network and details the impacts on the network architecture.
All UEs shall comply with existing requirements, among them PLMN selection and system information reception. The
present document also defines requirements for network-sharing supporting UEs.
full Table of Contents for TS 23.251 Word version: 15.1.0
1 Scope Word-p. 6
2 References
3 Definitions and abbreviations Word-p. 7
4 General Description
4.1 Overview
4.2 Core Network Operator and Network Selection Word-p. 9
5 Functional description
4.2.1 Core network operator identity
4.2.2 Broadcast system information for network sharing Word-p. 10
4.2.3 Network selection in a shared network 
4.3 Network Name Display for Supporting UEs
4.4 HPLMN Support
4.5 Support of Cell Broadcast Services and Warning System [R10] Word-p. 14
4.6 Support of Extended Access Barring [R11]
4.7 Support of service identification for improved radio utilization for GERAN [R11]
4.2.3.1 Behaviour of supporting UEs (GERAN, UTRAN and E-UTRAN)
4.2.3.2 Behaviour of non-supporting UEs (GERAN, UTRAN)
4.2.4 Assignment of core network operator and core network node
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]
4.2.5.1 Void
4.2.5.2 Void
4.2.5.3 CS/PS domain coordination and operator selection in GERAN and UTRAN [R13] Word-p. 12
4.2.6 Attach/detach handling Word-p. 13
5.1 UE functions
5.2 RNC functions
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
7.1 Network selection
A Network Resource Indicator (NRI) allocation examples Word-p. 33
7.1.2 Non-supporting UEs in a GWCN configuration
7.1.3 Supporting UEs in a GWCN configuration Word-p. 22
7.1.4 Non-supporting UEs in a MOCN configuration
7.1.4.1 UTRAN based MOCN configuration [R10]
7.1.4.2 GERAN based MOCN configuration [R10] Word-p. 25
7.1.4.3 CS registration after PS Handover [R13] Word-p. 28
7.1.5 Supporting UEs in a MOCN configuration Word-p. 30
7.1.5.1 UTRAN based MOCN configuration [R10]
7.1.5.2 GERAN based MOCN configuration [R10] Word-p. 31
7.1.6 Query to opposite domain [R13] Word-p. 32
A.1 NRI in shared UTRAN/GERAN networks
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]
B (Normative) Interaction with other network capabilities [R10] Word-p. 38
C Change History Word-p. 39
