Design of Multi-RAT Virtualization Architectures in LTE-Advanced Wireless Network Location: 國立暨南國際大學電機系 Source: ICIC Express Letters, vol. 8, no. 5, May 2014, pp (EI) Speaker: 麥毅廷 Date:2014/06/12 Contact Info.:

22 Outline New 3GPP standard –LTE –LTE-Advanced Related work-UMTS Multi-RAT Virtualization Architectures Performance Analysis Conclusion

333 Evolution for 3GPP International Telecommunication Union (ITU) –Identified the frequencies around 2GHz for International Mobile Telephony 2000 (IMT 2000) IMT 2000 spectrum allocation at 2GHz UMTS (WCDMA), LTE, LTE-A R11, R12

444 2G->4G LTE-A 1Gbps

5555 Introduction 3GPP Long Term Evolution (LTE) and IEEE WiMAX are competing access network technologies in 4G wireless networks LTE not only can offer traditional voice telephony service, but also can provide cost effective broadband communication services In the enhanced LTE version, LTE-Advanced, the transmission bandwidth has been further increased

6666 3GPP networks

7 3GPP core network

8 LTE LTE architecture

9 LTE device Serving Gateway (SGW) –Routes and forwards user data packets Packet Data Network Gateway (PDN GW) –Provides connectivity to the UE to external packet data networks (Internet) Mobility Management Entity (MME) –Manages and stores UE contexts eNodeB (eNB) User Equipment (UE)

10 LTE Functionality of EPC & E-UTRAN

11 LTE bearer SAE bearer Transmission unit

12 LTE EPS bearer architecture

13 Control Plane Protocol Stack

14 User Plane Protocol Stack

15 Overview of LTE & LTE-Advanced E-UTRAN

16 LTE-Advanced Layer1 RN –Amplify and Forward Layer2 RN –Decode and Forward Layer3 RN –Radio Resource Management

17 UMTS Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular technology (3G) for networks based on the GSM standard. Since 2006, UMTS networks in many countries have been or are in the process of being upgraded with High Speed Downlink Packet Access (HSDPA), sometimes known as 3.5G.

18 UMTS architecture-1

19 UMTS vs. LTE From internet

20 UMTS architecture-2

21 Virtualization Architecture Virtual

22 Multi-RAT Virtualization Architecture

23 Multi-RAT Virtualization support for LTE- Advanced network

24 Proposed Arch_A

25 Proposed Arch_B

26 Performance Evaluation- Qualitative MetricArch_AArch_B UMTS RNC Complexity Serving UMTS-UE via EPC tunneling IuPS (backhaul link) via Intranet RN Complexity UMTS-Uu (access link) and WCDMA tunnel (backhaul link) DeNB Complexity Bearer management + NB Virtualization Virtualization (NB and RNC) LTE/UMTS CN Complexity Bearer management S4 btw S-GW and SGSN No impact UMTS-UE Transmission Efficiency LowHigh Security ConcernLowMiddle

27 Inter-NB handover procedure

28 Performance Evaluation- Quantitative Metric HO latency (ms) Number of HO signal Arch_AArch_BArch_AArch_B Intra-NB handover Inter-NB handover

29 Conclusion We propose two architectures to support Multi-RAT Virtualization for LTE-Advanced network via exist interface and All-IP core network connection Those are achievable and novel Multi-RAT Virtualization architectures for future 4G wireless network. Based on results analysis, our proposed Arch_B might have better performance. However, to apply Arch_A for different purposes is also an alternative solution.

30 Thank you Q&A