3G EvolutionChapter: 1313
LTE and SAE: Introduction and Design Targetsand Design Targets
Isael Diaz
Department of Electrical and Information Technology
p gy
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 1
Outline
• Evolution• System Architecture Evolution• LTE Design Targets
– Capabilities– System Performancey– Deployment Related Aspects– Architecture and Migration– Radio Resource Managementg– Complexity and General Aspects
• SAE Design Targets– Inter-operabilityInter operability– Services– Security and Charging Models
• Chapter Summary• Chapter Summary
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 2
LTE and SAE: Evolution
• 2G: Mainly Voice• 2 5G: Packet Services2.5G: Packet Services• 3G: WCDMA• 3G Extension: HSPA• Beyond 3G:
– Two Parallel tracksLTE• LTE
• HSPA Evolution
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 3
*Image Courtesy “3G evolution HSPA and LTE Mobile Broadband”
LTE and SAE: System Architecture Evolution• Core Network Architecture support for LTE in terms of:
– Evolution of 3GPP core network– Simplified architecture– Full IP-Based
Higher throughput than legacy– Higher throughput than legacy– Lower latency than legacy– Support for multiple RANs– Mobility between RANs
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 4
LTE and SAE: LTE Design Targets
• Capabilities• System PerformanceSystem Performance• Deployment –related aspects• Architecture and migration• Radio resource management• Complexity• General Aspects
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 5
LTE and SAE: LTE Design Targets -Capabilitiesp• Peak Data Rate
– 100Mbps DL and 50Mbps UL @ 20MHz BWp p @• 5bps/Hz DL• 2.5bps/Hz UL• 2 Rx antennas 1 Tx antenna• Simultaneous max peak rate in FDD only
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 6
LTE and SAE: LTE Design Targets -Capabilities (2)p ( )• Latency
– Control-Plane transition time• Less than 100ms from R6-
Idle Mode to R6-CELL_DCH • Less than 50ms from R6-
CELL_PCH to R6-DCH– User-Plane
• Less than 5ms in a unload condition
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 7
*Image Courtesy 3GPP “TR 25.913 Requirements for E-UTRA and E-UTRAN”
LTE and SAE: LTE Design Targets -System Performancey• User throughput target
– Average user: 3x to 4x better than R6g– Cell Edge: 5th percentil of the user distribution
• Spectrum efficiency defined asA 2 t 4 (DL) 2 t 3 (UL) b tt th R6– Average user: 2x to 4x (DL), 2x to 3x (UL) better than R6
– Cell Edge: 2x to 3x (DL), 2x to 3x (UL) better than R6• Mobilityy
– 0 15Km/h : Maximum performance– 15 120Km/h : High Performance
120 350Km/h: Mantain connection– 120 350Km/h: Mantain connection
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 8
LTE and SAE: LTE Design Targets -System Performance (2)y ( )
• Coverage– Up to 5km cell range: Normal
P fPerformance– Up to 30Km cell range: Slight
degradationUp to 100Km cell range: no– Up to 100Km cell range: no requirements set
• MBMSBroadcast mode– Broadcast mode
– Unicast mode• Network Synchronization
I t it h i d– Int-site synch required– Yet, has to be supported
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 9
LTE and SAE: LTE Design Targets -Deployment Related Aspectsp y p• Deployment Scenarios
– Stand Alone– Inegrated with existing RAT
• Coexistance 3GPP RATsI t ti ti
Non-real Real time – Interruption times– Broadcast (LTE) to
Unicast(GSM)
time LTE WCDMA 500 ms 300 ms
LTE GSM 500 ms 300 ms
• Spectrum Flexibility– Spectrum different size– Diverse arrangementsDiverse arrangements
• Spectrum Deployment
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 10
LTE and SAE: LTE Design Targets -Deployment Related Aspects (2)p y p ( )• Spectrum Flexibility
– Spectrum different sizep– Diverse arrangements
• Spectrum DeploymentS t dj t h l– Same opetaror, area, adjacent channels
– Same area, diff operator, adjacent channels– Overlaping/adjacent spectrum at country borders– Deployment in steps
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 11
*Image Courtesy “3G evolution HSPA and LTE Mobile Broadband”
LTE and SAE: LTE Design Targets -Architecture and Migrationg• A single LTE RAN should be agreed• Packet Based real time conversational trafficPacket Based, real time conversational traffic• Minimize single points of failure• Minimized number of interfaces• RNL and TNL not excluded if improvement in system
performance is requiredS t f d t d Q S• Support for end-to-end QoS
• QoS consideres various types of traffic• Minimized delay for traffic• Minimized delay for traffic.
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 12
LTE and SAE: LTE Design Targets -Radio Resource Managementg• Enhanced support for end-to-end QoS
– Higher layer signalingg y g g• Efficient support for transmission of higher layers
– IP header compression• Support load sharing and policy management across
different RATs– Support end-to-end QoS during HO between RATspp Q g
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 13
LTE and SAE: LTE Design Targets -Complexity and General Aspectsp y p• Complexity addressed
– Overall system • Operation Cost• Operation Costy– Mobile terminal
• General AspectsMi i i ti t
Minimize
• Operation Cost
• Maintenance
• Operation Cost
• Maintenance
– Minimize operation cost– Minimize maintenance cost– Multi-vendor interfaces Support
• Multi-vendor interfaces
• Multi-vendor interfaces
– Low power mobile terminals
• Low power t i l
• Low power t i lEfficiency terminalsterminals
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 14
LTE and SAE: SAE Design Targets
• High level user and operational aspects• Basic capabilitiesBasic capabilities• Multi-access and seamless mobility• Man-machine interface aspects• Performance requirements for the evolved 3GPP system• Security and privacy• Charging aspects
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 15
LTE and SAE: SAE Design Targets -Inter-operabilityp y• Inter-operability between
more RATs than LTE even others than 3GPP’s
• Roaming• Inter-working with packet-
based and circuit-switched networks
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 16
*Image Courtesy 3GPP “TS 22.278 Service Requirements for E-Packet System”
LTE and SAE: SAE Design Targets –Services• Support for services like
– Voice– Video– Messaging
Data transmission– Data transmission• Support for IPv4 and IPv6
– Included mobility from one ot the other
• Support for QoS– Smooth mobility betweenSmooth mobility between
3GPP RATs
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 17
*Image Courtesy of CISCO
LTE and SAE: SAE Design Targets –Security and Charging Modelsy g g
• Internet-like security mechanism– Level of user privacy– Identity protection
Charging models• Charging models– Calling party pays– Flat rate– Charge based on QoS– Data volumes
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 18
Chapter summary
• LTE– Higher data rate than legacyg g y– Better coverage and performance– Flexible and scalable deployment
Designed from both system and mobile terminal perspective– Designed from both, system and mobile terminal perspective• SAE
– Inter-operability between more RATs than LTE even non-3GPP– Simplified from predecesors (redundant features removed)– More secure than legacy– Faster than legacyFaster than legacy– Better performance than legacy
23-April -2009 3G Evolution - HSPA and LTE for Mobile Broadband 19
