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LTE and EPC
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Motorola General Business
Mobile Broadband Evolution – LTE and EPC
Srini RaoSrini RaoFellow of Technical StaffFellow of Technical Staff
Motorola Enterprise Mobility SolutionsMotorola Enterprise Mobility Solutions
Agenda
• LTETimelineOverview
• Applications• EPC
OverviewInterworking and mobility
• 3GPP access• Non-3GPP access
QoS and PolicyRoamingVoice over LTE
• CSFB, VoLGA, IMS VoIP/One Voice, over the top • Voice Handover
• Future DirectionsLTE-Advanced
• SummaryMotorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 2
LTE Timeline
2005 2009 2010 20122006 2007 2008 2011
Trials
First LTE LaunchTeliaSonera
Trials
Deployments
StandardsRel 8
LTE / EPCRel 9 Rel 6
HSPARel 7
HSPA+Rel 10
LTE - Advanced
Verizon target s LTE Launch in
30 Markets
AT&T trials in 2010, Initial
deployment in 2011
59 LTE Network commitments in 28 countries around the world – GSA Mar 2010China Mobile trials TD-LTE in 2010
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 3
Terminology
• Long Term Evolution (LTE)3GPP (Third Generation Partnership Project) work item known as LTE
• Evolution of GSM/GPRS, WCDMA/HSPA radio networksLTE strictly refers to air interface, often entire technology (including core network) loosely referred to as LTE (or LTE/SAE)
• Evolved Packet Core (EPC)Outcome of 3GPP work item - System Architecture Evolution (SAE)
• Evolve GPRS and HSPA packet core networks to an all-IP based core• Other terms
Evolved UTRAN (E-UTRAN)• Radio access network is referred to as E-UTRAN
Evolved Packet System (EPS)• End-to-end system including LTE terminals, E-UTRAN, and Core network
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 4
LTE DriversUMTS-HSPA Voice and Data Traffic1
• Explosive growth in mobile data trafficRise in adoption of broadband wireless
devices• Smart phones, modems, integrated PCs/Laptops
Popularity of video, appsFlat rate data plans
• Need for improved cost efficiencyExpected cost per Mbps on HSPA is 14% of cost
on EDGE, and LTE would be 3% of EDGE cost2
Cost per MB expected to drop from € 0.06 for WCDMA to € 0.03 for HSPA and € 0.01 for LTE (2x5 MHz)3
Source: Dr. Klaus-Jurgen Krath, T-Mobile International
1. Source: HSPA to LTE-Advanced, Rysavy Research / 3G Americas, Sep. 20092. Kris Rinne, SVP Architecture and Planning, AT&T, 4G World, Sep. 20093. Source: Analysys Mason, 2008, from UMTS Forum white paper Feb. 2009
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 5
Key LTE Target Requirements1
• Peak data rates (for 20 MHz, 1 Tx and 2 Rx antennas at terminal)100 Mbps downlink (DL)50 Mbps uplink (UL)
• Improved spectral efficiency (in bits/s/Hz)3-4 times higher than HSPA (3GPP Release 6) DL2-3 times higher than HSPA UL
• Reduced latencyUser plane latency (one way radio delay) < 5 msControl plane latency (idle to active) < 100 ms
• Spectrum and bandwidth flexibility for deploymentChannel bandwidths 1.4, 3, 5, 10, 15 and 20 MHz, asymmetric allocation (different UL, DL BWs)Support both paired and unpaired spectrum (FDD and TDD modes using common air interface)
• Cost efficiencySimpler all-IP flat architectures, Self-Organizing Network (SON) capability etc. to reduce CAPEX and OPEX
1. From 3GPP TR 25.913
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 6
LTE Radio Interface
From UMTS Long Term Evolution (LTE) Technology Introduction, Rohde &Schwarz, Sep 08
• Multiple access schemeOFDMA DLSC-FDMA UL
• Similar to OFDMA, more power efficient • lower peak-to-average power ratio
• Adaptive Modulation and CodingDL/UL QPSK, 16QAM, 64QAMConvolutional and Turbo codes
• MIMO Spatial multiplexing(2 or 4)x(2 or 4) DL and ULMulti-user MIMOPeak rates up to 300/75 Mbps DL/UL for 4x4 MIMO
• LSTI (LTE/SAE Trial Initiative)10 operators in trials Peak rates for FDD and TDD normalized to 20 MHz > 100 Mbps DL, 30 – 50 Mbps ULMeasured end-end round trip latencies < 30 ms
• Verizon trial (10 MHz FDD)Average rates 5-12 Mbps DL, 2-5 Mbps UL, peak rates 40-50 Mbps DL, 20–25 Mbps UL
No. of Resource blocks ranging from 6 (1.4 MHz) to 100 (20 MHz)
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 7
LTE Frequency Bands
TDD2400 MHz–2300 MHz 2400 MHz–2300 MHz 40TDD1920 MHz–1880 MHz 1920 MHz–1880 MHz 39TDD2620 MHz–2570 MHz2620 MHz–2570 MHz 38TDD1930 MHz–1910 MHz1930 MHz–1910 MHz 37TDD1990 MHz–1930 MHz1990 MHz–1930 MHz 36TDD1910 MHz–1850 MHz1910 MHz–1850 MHz 35TDD2025 MHz–2010 MHz 2025 MHz –2010 MHz34TDD1920 MHz–1900 MHz1920 MHz–1900 MHz33
...
FDD746 MHz–734 MHz716 MHz–704 MHz 17FDD768 MHz–758 MHz798 MHz–788 MHz14FDD756 MHz–746 MHz787 MHz–777 MHz13FDD746 MHz–728 MHz716 MHz–698 MHz12FDD1495.9 MHz –1475.9 MHz1447.9 MHz –1427.9 MHz 11FDD2170 MHz–2110 MHz1770 MHz–1710 MHz10FDD1879.9 MHz–1844.9 MHz1784.9 MHz–1749.9 MHz9FDD960 MHz–925 MHz915 MHz–880 MHz8FDD2690 MHz–2620 MHz2570 MHz–2500 MHz7FDD885 MHz–875 MHz840 MHz–830 MHz6FDD894MHz–869 MHz849 MHz–824 MHz5FDD2155 MHz–2110 MHz1755 MHz –1710 MHz4FDD1880 MHz–1805 MHz1785 MHz–1710 MHz 3FDD1990 MHz–1930 MHz1910 MHz–1850 MHz 2FDD2170 MHz–2110 MHz 1980 MHz–1920 MHz 1
Duplex ModeDownlink (DL) BS transmitUplink (UL) UE transmitOperating
Band
From 3GPP TS 36.101
Verizon to deploy LTE in 700 MHz spectrum (10 + 10 MHz in Band class 13)AT&T to deploy LTE in 700 MHz and AWS spectrum (Band class 4)2.6 GHz TDD band being added in U.S. for Clearwire
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 8
LTE Enables New Applications
HD Video Streaming(720i H264)DL 6-8Mbps
DL Data Rate
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 9
Video Blogging / Live videoUL SD-2Mbps / HD-6-8Mbps
UL Data RateLatency
MMOG (Online Gaming)<50msec latency
Latency
Permanent Sync DL/UL 1-2Mbps
UL Data RateCost per bit
Peer2Peer ∞Mbps DL/UL
Data RateCost per bit
Evolved Packet Core (EPC)
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 10
Why is Core Evolution needed?
• 2G/3G mobile core networks designed for low-speed, best-effort data• Increased scalability of core elements to handle significant increase in
number of connections, bandwidth, and mobility• High throughput and low latency requirements• Key aspects of EPC
All-IP flat network architectureSeparation of control and data planesEnd-to-end QoS management and service control through policy control and charging (PCC) architectureNo circuit-switched coreSupport for multiple access networks
• Not coveredProtocol alternatives for S5/S8 interface GTP versus PMIPv6 – assuming GTP primarily for simplicityRelated topic of on-path versus off-path policySecurity – authentication, authorization, etc.Charging
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 11
2G/3G to LTE
Access Packet Core Services
GSM/GPRS
BTS BSC MGW
Circuit Core
MSC ServerWCDMA/HSPA
Node B
LTE/SAE
eNodeB
MME
RNC
Serving GW
PDN GW
SGSN
GGSN
PSTNPSTN
IP Networks(IMS, Internet
etc.)
IP Networks(IMS, Internet
etc.)
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 12
Network Architecture Overview
UE
MME
HSS
Serving GW
PDNGW
PCRF
IP Networks (IMS, Internet etc.)
IP Networks (IMS, Internet etc.)
S6a
S11
S1-U
S1-MME
LTE-Uu S5
Gx
Rx
SGieNB
S10
X2
Mobility Management Entity• Key control and Signaling Element• Gateway Selection• Idle state terminal location management• Bearer control
Home Subscriber Server• User subscription data
Policy and Charging Rules Function
• Gating and QoS policy control• Flow-based charging control
Serving Gateway• Bearer plane element interfacing E-UTRAN• Mobility anchor for inter-eNB and inter-3GPP access mobility
Packet Data Network (PDN) Gateway• Bearer plane element interfacing PDNs• Terminal IP address allocation• Policy enforcement• Packet filtering• Charging
Evolved Node B• Radio Resource Management• User plane IP header compression and encryption
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 13
UE
MME
SGSN
HSS
Serving GW
PDNGW
PCRF
IP Networks (IMS, Internet etc.)
IP Networks (IMS, Internet etc.)
WCDMA/HSPA
WCDMA/HSPA
GSM/GPRS
GSM/GPRS
S6a
Gr
S1-U
S1-MME
LTE-Uu S5
Gx
Rx
SGi
Gn
eNB
S10
X2
Interworking and Mobility – 3GPP Access (Gn/Gp SGSN)
S12
Gn
S11
• Handovers to/from 2G/3G similar to inter-SGSN handover withMME acting as an SGSNPDN GW acting as a GGSN
• SGSN must select a PDN GW for LTE capable terminals in 2G/3G• Model applicable for GTP based S5/S8 interface• HSS needs to support or interwork with Gr interface• Direct tunnel support via S12 interface for 3G
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 14
UE
MME
SGSN
HSS
Serving GW
PDNGW
PCRF
IP Networks (IMS, Internet etc.)
IP Networks (IMS, Internet etc.)
WCDMA/HSPA
WCDMA/HSPA
GSM/GPRS
GSM/GPRS
S6a
S4
S1-U
S1-MME
LTE-Uu S5
Gx
Rx
SGi
S3
eNB
S10
X2
Interworking and Mobility – 3GPP Access (S4 SGSN)
S12
S11
• Addition of new S3 and S4 interfaces• Support for Idle mode Signaling Reduction (ISR)• Enables EPC-only core for all 3GPP accesses, including ability to handover between
and within 2G & 3G radio networks• Direct tunnel support via S12 interface for 3G
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 15
Interworking and Mobility – non-3GPP Access(Optimized Handover for HRPD/EV-DO)
HRPD High Rate Packet Data
AN Access Node
HSGW HRPD Serving GW
AAA Authentication, Authorization, Accounting
LTE-UuUE
MME
HSS
Serving GW
PDNGW
PCRF
IP Networks (IMS, Internet etc.)
IP Networks (IMS, Internet etc.)
S6a
S11
S1-U
S1-MME
S5
Gx
Rx
SGieNB
AAA
HRPD AN HSGW
S101 S103
IOS
S2a
STa
SWx
S6b
• Optimized handover supported in both idle and active states and E-UTRAN to/from HRPDCommon user subscription data in HSSTerminal in E-UTRAN receives HRPD system info on broadcast channel or via dedicated signalingPre-registration (and handover signaling) using S101 interfacePDN GW acts as a common IP anchor pointUser data between HSGW and PDN GW transported over S2a interface supporting PMIPv6
• Serving GW forwards packets destined to terminal via S103 interface to HSGW
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 16
Interworking and Mobility – Non-3GPP Access (Generic)
LTE-UuUE
MME
HSS
Serving GW
PDNGW
PCRF
IP Networks (IMS, Internet etc.)
IP Networks (IMS, Internet etc.)
S6a
S11
S1-U
S1-MME
S5
Gx
Rx
SGieNB
TrustedNon-3GPP(WiMAX, CDMA)
TrustedNon-3GPP(WiMAX, CDMA)
S2a
STa
SWx
UntrustedNon-3GPP(WiFi etc.)
UntrustedNon-3GPP(WiFi etc.)
ePDG
SWa
S6b
S2b
SWn
AAA
SWmePDG evolved Packet Data Gateway
• Trusted (e.g. WiMAX, CDMA) versus untrusted (e.g. public WiFi) Non-3GPP networks• Trusted access networks connect to PDN GW via S2a similar to optimized HRPD• For untrusted networks, terminal connects to ePDG using IPSec tunnels
ePDG interfaces to PDN GW via S2b using PMIPv6• Network based versus client based mobility
For client based mobility, terminal connects to PDN GW via S2c interface (not shown) using DSMIPv6 or MIPv4
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 17
QoS Concepts
• EPS Bearer is a logical aggregate of one or more IP flowsIP flows (aka service data flows or SDFs) may belong to one or more services
• EPS Bearer provides connectivity to Packet Data Networks (PDNs)Bearer extends from UE to PDN GWAll Service data flows within a bearer receive same level of QoS
• Default bearer established when UE connects to a PDNRemains in place as long as the PDN connection is aliveProvides UE with low latency always-on IP connectivity to PDNQoS level of default bearer assigned based on subscription
• Dedicated bearers are setup when new IP flows that require specific packet forwarding treatment are started
• Dedicated bearers can be Guaranteed Bit Rate (GBR) or non-GBRDefault bearer is always non-GBR
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 18
EPC Bearer Model (GTP based S5/S8)
PDN GW
Service Data Flows
eNBUE
Service Data Flows
UL Packet Filter
Radio Bearer S1 Bearer
Application / Service Layer
S5/S8 BearerS GW
DL Packet Filter
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 19
QoS Parameters• QoS Class Identifier (QCI)
A scalar value mapped to specific bearer level packet forwarding treatment
• e.g. scheduling weights, queue management thresholds, link layer protocol configuration etc.
9 standardized values of QCI definedEach bearer assigned one and only one
QCI• Allocation and Retention Priority (ARP)
Decision to accept or reject due to resource limitations (typically GBR bearers)
Decision (e.g., by eNB) which bearer(s) to drop (e.g. at handover)
• Guaranteed Bit Rate (GBR) and Maximum Bit Rate (MBR)
Apply to GBR bearers In Release 8, MBR equals GBR
• Aggregate Maximum Bit Rate (AMBR)APN-AMBR total bit rate allowed for a
user for all non-GRR bearers associated with an APN (Access Point Name)
UE-AMBR total bit rate allowed for a user for all non-GRR bearers
separate UL and DL values of AMBR
QCI ResourceType
Priority Packet DelayBudget
Packet ErrorLoss Rate
Example Services
1 2 100 ms 10-2 Conversational Voice
2 GBR 4 150 ms 10-3 Conversational Video (Live Streaming)
3 3 50 ms 10-3 Real Time Gaming
4 5 300 ms 10-6 Non-Conversational Video (Buffered Streaming)
5 1 100 ms 10-6 IMS Signalling
6 6 300 ms 10-6 Video (Buffered Streaming)TCP-based (e.g., www, e-mail, chat, ftp, p2p file
sharing, progressive video, etc.)7 Non-GBR 7 100 ms 10-3 Voice, Video (Live Streaming), Interactive Gaming
8 8 300 ms 10-6 Video (Buffered Streaming)TCP-based (e.g., www, e-mail, chat, ftp, p2p file
9 9 sharing, progressive video, etc.)
From 3GPP TS 23.203
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 20
Policy and Charging Control (PCC) PCRF Policy and Charging Rules Function
PCEF Policy and Charging Enforcement Function
SPR Subscription Profile Repository
AF Application Function
OFCS Offline Charging System
OCS Online Charging System
PCEFPDN GWUE
MME
HSS
Serving GW
PCRF
IP Networks (IMS, Internet etc.)
IP Networks (IMS, Internet etc.)
S6a
S1-U
S1-MME
LTE-Uu S5
Gx
Rx
SGi
S3
eNB
S10
X2
SPRSp
AF
OCS
OFCS
Gy
Gz
S11
• Policy control gating control – allow or block IP flowsQoS control – provide authorized QoS (eg. QoS
class, bit rates etc.) decision to PCEF which enforces it
• Charging control – online and offline• PCC rule includes SDF template, precedence, gate status, QoS control info (QCI, ARP, bit rates etc.), charging control info
• PCC enables a centralized mechanism for service-aware QoS and charging control• PCRF controls dynamic policies based on
subscription info from SPR, Session info from AF, operator provisioned policies, access network info from PCEF etc.
alternatively, static policies can also be provisioned in PCEF
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 21
Policy Control Use Case for IMS Voice
PCEFPDN GWUE
MME
HSS
Serving GW
PCRF
IP Networks (IMS, Internet etc.)
IP Networks (IMS, Internet etc.)
S6a
S11
S1-U
S1-MME
LTE-Uu S5
Gx
Rx
SGi
S3
eNB
S10
X2
SPRSp
AF(P-CSCF)
OCS
OFCS
Gy
Gz
4. Policy Decision
6. Bearer binding
1. Application Signaling (SIP/SDP)
2. App Info
3. Subscription Info
5. PCC rule
6. Activate / modify bearer
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 22
Network Architecture for Roaming (Home Routed)
LTE-UuUE
MME
HSS
Serving GW
PDNGW
hPCRF
IP Networks
(IMS, Internet)
IP Networks
(IMS, Internet)
S6a
S11S1-MME
S8
GxRx
SGi
S1-UeNB
TrustedNon-3GPP(WiMAX, CDMA)
TrustedNon-3GPP(WiMAX, CDMA)
S2a
STa
SWx
UntrustedNon-3GPP(WiFi etc.)
UntrustedNon-3GPP(WiFi etc.)
ePDG
SWa
S6b
S2b
SWn
SWm
vPCRFS9
GxbGxc AAAProxy
SWd
Gxa
AAA
Home Network
Visited Network
• Serving GW in visited network and PDN GW in home connected via S8 interfaceAll traffic for the terminal IP connection routed via home network
• No direct policy control across home/visited network boundaryOnly through interaction between home PCRF and visited PCRF via S9 interfacevPCRF may accept or reject (not modify) policy decisions made by hPCRF
• If S8 is based on GPRS Tunneling Protocol (GTP), vPCRF and S9 are not required
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 23
Network Architecture for Roaming (Local Breakout)
LTE-UuUE
MME
HSS
Serving GW
hPCRF
IP Networks
IP Networks
S6a
S11S1-MME
S5
Gx
Rx
SGi
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 24
S1-UeNB
TrustedNon-3GPP(WiMAX, CDMA)
TrustedNon-3GPP(WiMAX, CDMA)
S2a
SWx
UntrustedNon-3GPP(WiFi etc.)
STa
UntrustedNon-3GPP(WiFi etc.)
ePDG
SWa
S6b
S2b
SWn
SWm
S9
GxbGxc
SWd
Gxa
AAA
Home Network
Visited Network
Rx
Visited IP Networks
Visited IP Networks
AAAProxyPDN
GW
vPCRF
• Both Serving GW and PDN GW in visited network Traffic routed from terminal to IP network directly
• Application Function (AF) may be in Home or Visited networkIf AF is in visited network, Rx signaling transported to home PCRF via visited PCRF using S9 interface
Voice Options for LTE
• LTE/SAE networks have no circuit coreInitial roll-outs likely will support data only devices such as USB dongles
• Voice based on legacy circuit coreCS (Circuit Switch) Fallback (CSFB)Voice over LTE via Generic Access Network (VoLGA)
• Voice based on IMS3GPP Multimedia Telephony (MMTel) / One Voice
• Over the top VoIP
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 25
Circuit Switch Fallback (CSFB)
• Use legacy CS domain for voice in 2G/3G (GSM, WCDMA, CDMA1x)• MSC upgraded to interface with EPC
new SGs interface with MME for GSM/WCDMAS102 interface between MME and 1x Interworking
Solution (1xCS IWS) for CDMApaging request delivered via LTEpaging response etc. and call originations via
2G/3G• Feature in 3GPP Rel 8 standard
Supported by NTT DoCoMo, KDDI and othersOptimizations to address call setup delays in Rel 9
(for CDMA) and Rel 10 for GSM/WCDMA
CS Voice
CS Voice
Signaling
EPC
2G/3G Core
SGs
MSC
MME
• Suitable for initial stages of LTE deployment prior to IMS introduction • Dual RX terminal alternative to new interface requirements• SMS also supported over LTE using the interfaces with 2G/3G MSC
No fallback to 2G/3G needed • Handover of concurrent LTE data sessions depend on 2G/3G network capability
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 26
Voice over LTE via Generic Access (VoLGA)
• Based on 3GPP UMA/GAN standard for voice over WiFi
VoLGA Access Network Controller (VANC) is a modification of GANC
• CS signaling and bearers tunneled over IP• Developed in VoLGA Forum, not a 3GPP standard
Driven by T-Mobile
VoIP
EPC
2G/3G Core
MSC
VANCCS Voice
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Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 27
IMS based VoIP (MMTel / One Voice)
• SIP based VoIP for terminals in LTE using IMS Multimedia Telephony (MMTel) standard• Support for voice call handover to CS domain in 2G/3G for broader coverage
Single Radio Voice Call Continuity (SR-VCC)• One Voice profile defined to promote a standardized solution for initial deployment of cellular IMS based VoIP network
Supported by several Operators including AT&T and Verizon
VoIP
EPC
2G/3G Core
MSC
MME
IMS
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 28
Voice Handover Mechanisms
• Single Radio Voice Call Continuity (SRVCC)
VoIP call on LTE to circuit voice call on GSM, WCDMA or CDMA 1x
Enhanced MSC server with Sv interface to MME in GSM/WCDMA
1xCS Interworking Solution (1xCS IWS) in CDMA1x with S102 interface to MME
• Call anchored on IMS (SCC-AS)• Network layer mechanism
VoIP
EPC
2G/3G Core
Sv
MSC
MME
IMS
CS Voice
CS Voice
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Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 29
Voice Handover Mechanisms Cont’d
• IMS based Service Centralization and Continuity (SCC)
VoIP call on WLAN to circuit voice call on UTRAN/GERAN or CDMA 1x
Calls anchored on IMS SCC-AS• Application layer mechanism
when access networks do not provide support for voice handovers
• Terminal makes handover decisions
VoIP
WiFi/WiMAX
2G/3G Core
MSC
IMS
CS Voice
CS Voice
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 30
LTE-Advanced
• Key feature of 3GPP Release 10, targeted for March 2011 • Wider Bandwidth
Support for bandwidths larger than 20 MHz (40 MHz, 100 MHz)Carrier Aggregation – aggregate two or more component carriers
• Peak data rates of 1 Gbps DL, 500 Mbps UL• UL and DL Transmission Schemes
Beamforming, MIMO enhancements• Coordinated Multi-Point Tx and Rx (CoMP)
Improve coverage, cell edge throughput and/or system efficiency• Relaying
Relay Nodes forward traffic/signaling between eNB and terminalsImprove coverage of high data rates, extend coverage to shadowed areas etc.
• LTE-Advanced submitted by 3GPP as candidate for ITU-R IMT-Advanced 4G technology solution in October 2009
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 31
Summary and Conclusion
• LTE technology is being proven to meet or exceed initial target requirementsLarge ecosystem of operators, vendors etc. committed to LTE
• Commercial network deployments planned 2010 and beyond• EPC represents an efficient all-IP packet core
Supports delivery of mobile Internet services with QoS over broadband radio networksSupports multiple access technologies (all 2G/3G cellular, WiMAX, WiFi etc.) and mobility between these access networks
• LTE and EPC can cost effectively address the demands of future mobile broadband growth
Motorola General Business
Srini Rao LTE EPC IEEE ComSoC Boston April 8, 2010 32