CONTENTS

List of Figures 

List of Tables 

1 Executive Summary 

2 Introduction 

3 Multi-Mode Multi-Band Device Challenges 

4 GTI MM-MB Device Requirements 
4.1 LTE Multi-Band Requirements 
4.2 Device Multi-Mode Requirements 
4.3 Voice and DAta Support 
4.3.1 Circuit Switched Fallback (CSFB) 
4.3.2 Dual Standby / Simultaneous Voice-LTE (SVLTE) 
4.3.3 Single Radio Voice Call Continuity (SRVCC) 
4.3.4 Voice Over LTE (VOLTE) 
4.3.5 Survey Results 
4.4 FDD to TD-LTE Mobility Requirements 
4.4.1 UE Capabilities 
4.4.2 Measurements 
4.4.3 FDD/TD-LTE Mobility though Release /Redirection Mechanism 
4.4.4 Handover between FDD/TD-LTE in RRC connect State with Identical or Arbitrary UE Capabilities 
4.5 MIMO Support 
4.5.1 MIMO Types and Concepts in LTE 
4.5.2 Open loop TX Diversity versus closed loop 
4.6 Carrier-Aggregation Requirements and their Impact on device Requirements 
4.6.1 Intra-Band CA Requirements 
4.6.2 Inter-Band CA Requirements 
4.7 Device ConFiguration Requirements to Support Roaming Scenarios 

5 Device Architecure Recomendations 
5.1 Device Architectures 
5.1.1 Global Device Architectures for SMARTPHONES 
5.1.1.1 Single chipset architecture 
5.1.1.2 Dual Standby architecture 
5.1.2 DATA ONLY Device Architectures 
5.1.2.1 Multi-Mode MUlti-Band architecture for Mobile Hotspots 
5.1.2.2 Architecture FOR DATA CARDS / CPE 
5.1.2.3 TabletS –A New Area On Data Devices 

6 Conclusion 

7 References 

8 Appendix - I 
8.1 Additional Dual Standby architectures – Single BBIC Solution 
8.1.1 LTE / TD-SCDMA + WCDMA / GSM 
8.1.2 LTE / TD-SCDMA / WCDMA + GSM 
8.2 Additional Dual Standby architectures – Dual BBIC Solution 
8.2.1 LTE + WCDMA / TD-SCDMA / GSM 
8.2.2 LTE / TD-SCDMA + WCDMA / GSM 
8.2.3 LTE / TD-SCDMA / WCDMA + GSM 
8.3 Additional Single Standby architecture 

GTI 4G Multi-Mode Multi Band Device Requirements and Architectures White Paper_v2.0