EXECUTIVE SUMMARY .............................................................................................................................. 4
1 Introduction.................................................................................................................................... 5
1.1 Coexistence of GSM, HSPA/WCDMA AND LTE ........................................................... 5
1.2 The System Architecture Evolution Aspects .................................................................. 5
1.3 Scope ............................................................................................................................. 6
Voice Solutions .............................................................................................................. 6
Mobility ........................................................................................................................... 6
Roaming Aspects ........................................................................................................... 6
Radio Network Design and Performance ....................................................................... 7
2 Radio Access Network Considerations ....................................................................................... 8
2.1 Technology Coexistence ................................................................................................ 8
2.2 Spectrum Considerations ............................................................................................... 8
Multi-Standard Radio ..................................................................................................... 8
2.3 The UICC/USIM and Roaming ..................................................................................... 10
2.4 Coverage Triggered WCDMA/GERAN Session Continuity ......................................... 10
3 Core Network Considerations ..................................................................................................... 11
3.1 Core Network Overview ............................................................................................... 11
3.2 Migratory ASpects ........................................................................................................ 12
Pre-Rel-8 Gn/Gp Mobility ............................................................................................. 13
Rel-8 S3/S4 Based EPS Mobility ................................................................................. 14
3.3 Subscriber Data Aspects: USIM/ISIM .......................................................................... 15
3.4 Roaming Scenarios ...................................................................................................... 15
Home tunneling or home routed scenario .................................................................... 16
Home tunneling along with possibility of local breakout .............................................. 16
4 QoS in 3GPP ................................................................................................................................ 16
4.1 QoS classification and differences in 3GPP networks ................................................. 18
QoS Classification in LTE Rel-8 ................................................................................... 18
QoS classification in UMTS and GPRS networks ........................................................ 20
4.2 Network-initiated vs. Terminal-initiated QoS control paradigms .................................. 20
5 LTE Services ................................................................................................................................ 22
5.1 Services over LTE ........................................................................................................ 22
5.2 Circuit Switched Fallback ............................................................................................. 24
RRC Release with Redirect ......................................................................................... 25
Enhanced Release with Redirect, Automatic System info Exchange with RIM ........... 26
PS Handover between LTE and GERAN for CSFB ..................................................... 27
Cell Change Order ....................................................................................................... 28
5.3 IMS Voice ..................................................................................................................... 28
Introduction to IMS ....................................................................................................... 28
Introduction to MMTEL ................................................................................................. 30
5.4 LTE To Circuit Switched Voice Call Continuity ............................................................ 32
3GPP Rel-9 Architecture enhancements ..................................................................... 32
3GPP Rel-10 Architecture enhancements ................................................................... 33
5.5 Roaming Considerations .............................................................................................. 34
5.6 IMS Centralized SERVICES (ICS) ............................................................................... 34
Architecture for ICS ...................................................................................................... 35
5.7 Messaging over LTE .................................................................................................... 35
SMS over SGS ............................................................................................................. 35
IMS Messaging ............................................................................................................ 36
UICC/USIM and IMS Messaging.................................................................................. 38
6 Regulatory Issues ........................................................................................................................ 39
6.1 Lawful Intercept ............................................................................................................ 39
6.2 Emergency Services .................................................................................................... 40
6.3 Telecommunications Device for the Deaf (TDD) ......................................................... 41
6.4 Non-Voice Emergency Service (NOVES) .................................................................... 41
6.5 Priority Services ........................................................................................................... 42
6.6 Commercial Mobile Alert System (CMAS) ................................................................... 43
7 Devices for Seamless Migration ................................................................................................. 46
7.1 Multimode and Multiband Devices ............................................................................... 46
Antenna Separation and frequency band of operation ................................................ 50
7.2 Support for LTE UE Profile Defined by IR.92 for Voice ............................................... 52
8 Evolution to communication with devices ................................................................................ 54
8.1 Network Security .......................................................................................................... 56
8.2 Network Considerations ............................................................................................... 56
8.3 Device Implications (Man-Machine Interface of UE) .................................................... 56
8.4 MTC Implications for Coexistence of GSM, HSPA, LTE ............................................. 58
Download link is here : http://www.4gamericas.org/documents/...ay%202011x.pdf
