The Evolution of Rel-7 to Rel-8—HSPA and SAE/LTE TABLE OF CONTENTS PREFACE .....................................................................................................................................................4 1 INTRODUCTION........................................................................................................................................5 2 PROGRESS OF REL-99/REL-5/REL-6 UMTS .........................................................................................6 2.1 PROGRESS TIMELINE.............................................................................................................................6 3 PROGRESS OF REL-7 AND HSPA EVOLVED/HSPA+..........................................................................8 3.1 BACKGROUND AND STANDARDS STATUS ...............................................................................................8 3.1.1 Radio Enhancements ......................................................................................................................8 3.1.1.1 Enhanced Performance Requirements based on Receive Diversity & LMMSE Equalizer Receiver for HSDPA UE (Type 3 Receivers)...................................................................................9 3.1.1.2 Higher Order Modulations...................................................................................................9 3.1.1.3 Continuous Packet Connectivity (CPC) for Data Users....................................................10 3.1.1.4 MIMO (Multiple Input Multiple Output) Antennas..............................................................12 3.1.1.5 RAN Architecture Improvements ......................................................................................12 3.1.2 Device Related Enhancements .....................................................................................................12 3.1.2.1 Globally Routable User Agent URIs (GRUU) ...................................................................12 3.1.2.2 UICC Enhancements ........................................................................................................13 3.1.3 Evolved EDGE...............................................................................................................................13 3.2 PERFORMANCE BENEFITS...................................................................................................................14 3.2.2 Higher Order Modulation, DL.........................................................................................................14 3.2.3 Higher Order Modulation, UL.........................................................................................................14 4 THE GROWING DEMANDS FOR WIRELESS DATA APPLICATIONS ................................................15 4.1 WIRELESS DATA TRENDS AND FORECASTS ..........................................................................................15 4.2 WIRELESS DATA REVENUE ..................................................................................................................16 4.3 3G DEVICES .......................................................................................................................................17 4.4 3G APPLICATIONS ...............................................................................................................................19 4.5 IP MULTIMEDIA SUBSYSTEM (IMS).......................................................................................................24 4.6 VOIP OVER CELLULAR.........................................................................................................................24 5 OVERVIEW OF 3GPP REL-8 – SAE/EPS AND LTE/EUTRAN .............................................................25 5.1 EVOLVED PACKET SYSTEM (EPS) ARCHITECTURE ...............................................................................25 5.1.1 Functional Nodes...........................................................................................................................27 5.1.2 Support for non-3GPP accesses ...................................................................................................27 5.1.3 Interfaces & Protocols....................................................................................................................27 5.1.4 Interfaces & Protocols for non-3GPP accesses ............................................................................28 5.1.5 System Aspects .............................................................................................................................29 5.1.5.1 QoS and Bearer Concept..................................................................................................29 5.1.5.2 Network Selection .............................................................................................................30 5.1.5.3 Identities............................................................................................................................30 5.1.5.4 Security Aspects ................................................................................................................30 5.1.5.5 Roaming and Non-Roaming Scenarios ............................................................................32 5.2 EUTRAN AIR-INTERFACE ...................................................................................................................34 www.3gamericas.org July 2007 p. 2 5.2.1 Downlink ........................................................................................................................................35 5.2.1.1 Mapping between Transport and Physical Channels .......................................................35 5.2.1.2 LTE Downlink Frame Structure and Numerology .............................................................36 5.2.1.3 LTE Downlink Control Channel Structure .........................................................................38 5.2.1.4 LTE Downlink Synchronization Channel Structure...........................................................39 5.2.1.5 LTE Broadcast Control Channel (BCH) Structure ............................................................40 5.2.1.6 LTE E-MBMS Structure ....................................................................................................40 5.2.1.7 LTE DL Performance with Single Input Multiple Output (SIMO).......................................41 5.2.1.8 LTE E-MBMS Performance ...............................................................................................42 5.2.2 Uplink.............................................................................................................................................43 5.2.2.1 Mapping between Transport and Physical Channel .........................................................44 5.2.2.2 Frame Structure and Numerology.....................................................................................44 5.2.2.3 Shared Channel Structure ................................................................................................45 5.2.2.4 Reference signal ...............................................................................................................45 5.2.2.5 Control Channel Structure ................................................................................................45 5.2.2.6 Random Access................................................................................................................46 5.2.2.7 Power Control ...................................................................................................................47 5.2.2.8 Performance estimates .....................................................................................................47 5.2.2.9 Channel dependent frequency domain scheduling...........................................................48 5.2.3 Radio Access Protocol Architecture .............................................................................................49 5.2.4 Multi-Antenna Solutions................................................................................................................50 5.2.4.2 MIMO Status in 3GPP LTE Standardization.....................................................................53 5.2.4.3 LTE Performance with Multi-Antennas .............................................................................54 5.2.5 Interference Mitigation Techniques ..............................................................................................57 5.2.5.1 Interference Randomization..............................................................................................58 5.2.5.2 Interference Cancellation ..................................................................................................58 5.2.5.3 Interference co-ordination / avoidance .............................................................................58 5.3 OTHER REL-8 ENHANCEMENTS............................................................................................................60 5.3.1 Common IMS................................................................................................................................60 5.3.2 Multimedia Priority Service ...........................................................................................................60 5.3.3 IMS Enhancements for Support of Packet Cable Access ............................................................60 5.3.4 IMS Service Brokering..................................................................................................................60