LTE Portfolio Webinar


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LTE Portfolio Webinar

  1. 1. LTE Portfolio Webinar
  2. 2. LTE Portfolio Webinar Outline 1. LTE Intro 2. 4G Simulators • LTE PHY Lab (Description and toolbox contents) • LTE MAC Lab (Description and toolbox contents 3. LTE STACKS 4. Q&A Copyright © IS-Wireless | 2
  3. 3. LTE Introduction
  4. 4. LTE Introduction 3GPP Systems’ Evolution 1992 1997 2000 2005 2009 2011/2012 LTE-Advanced GSM GPRS UMTS HSPA LTE 2G 2.5G 3G 3.5G 3.9G 4G Phase 1 Phase 2 Rel. 96 Rel. 97 Rel. 98 Rel. 99 Rel. 4 Rel. 5 Rel. 6 Rel. 7 Rel. 8 Rel. 9 Rel. 10 Rel. 11 3GPP Release Voice only 14.4kbps UL: 128kbps DL: 384kbps UL: 11Mbps DL: 28Mbps UL: 75Mbps DL: 325Mbps UL: 500Mbps DL: 1Gbps Highest Data Rate Copyright © IS-Wireless | 4
  5. 5. LTE Introduction Goals / Requirements for LTE and SAE Standardization work for LTE and SAE started in December 2004 All IP based/flat core network architecture High data rate/low latency/packet optimized RAN Fixed EPC eNB IMS/Services/ Internet/PSTN aGW WiMAX cdma200 eNB LTE Goals/Requirements • High speed (up to 350km/h) • Low latency (below 10ms) • Large throughputs (DL 100Mbps, UL 50Mbps) • VoIP Capacity (200 users in 5MHz BW) • Lower bit cost • Flexible and scalable BW and spectrum • Flat RAN network (only eNBs) Copyright © IS-Wireless | GERAN/ UTRAN SAE Goals/Requirements • Access for all NWs (interworking/global roaming) • IMS for all NWs • Easy migration to EPS (from 2G/3G networks) • Flat IP network (‘always-on’ concept) • QoS Support for all services • Policy and charging 5
  6. 6. LTE Network Network Architecture and Radio Interface Features LTE Network Uu eNB S1-U SGW S5 PGW Internet / IMS ... X2 S11 Uu eNB LTE Radio Interface S1-MME MME S6a HSS Radio Interface Technologies • Multicarrier Transmission: DL OFDMA, UL SC-FDMA • Shared data channels with fast update (1ms) and multilayer retransmissions eNB • Adaptive Modulation and Coding • Multi Antenna Transmission: DL MIMO (2 or 4 antennas) • Scalable System BW: 1.4, 3, 5, 10, 15, 20 MHz • Quality-of-Service on Radio Interface Copyright © IS-Wireless | 6
  7. 7. LTE Radio Interface Protocol Stack EPS Session Management: Manage PDN connections/QoS EPS Mobility Management: Security/mobility mngmt Ciphering Header Compression Seq Number Maintain Control Plane Application Towards IMS/Internet RRC IP Towards PGW PDCP PDCP PDCP RLC RLC MAC MAC PHY PHY L3 NAS Radio Bearer Management Config of L2/L1 Ciphering Integrity protection Segment/Concat. ARQ Scheduling HARQ Multiplexing User Plane L3 RRC L2 PDCP L2 RLC RLC L2 MAC MAC L1 PHY PHY The same functions as in Control Plane Processing Resource Mapping Uu Uu eNB Copyright © IS-Wireless | eNB 7
  8. 8. LTE Towards 4G Features’ Roadmap 2008 2009 2011 2010 2012 LTE Rel. 8 MIMO TF Scheduling Standardization Specs Freezing December 2008 Commercial deployment OFDMA/SCFDMA HARQ Reduced architecture LTE Rel. 9 Adaptive-MCS MBMS based on SFN SON Location Services LTE Rel. 10 Carrier Agregation (wider BW) LTE-Advanced Specs Freezing March 2011 Relaying Extended DL MIMO (8x8) UL MIMO (4x4) Enhanced Home eNB & HetNet LTE Rel. 11 Specs Freezing December 2009 Coordinated Multipoint Tx/Rx Specs freezing target december 2012 MTC (M2M Communications) eICIC and Relays Copyright © IS-Wireless | 8
  9. 9. 4G Simulators
  10. 10. Reasons For System Modelling For Various Players in the Value Chain
  11. 11. LTE PHY Lab v.1.2 – a link level simulator
  12. 12. LTE PHY Lab E-UTRA Physical Layer Model Comprehensive implementation of the 3GPP Rel 8 E-UTRA PHY Main features of the LTE PHY Lab: • Implemented according to 3GPP Specifications LTE PHY Lab can be used to model link-level behavior of LTE system: Downlink • Downlink & Uplink • Single TX - single RX • fading & AWGN • FDD and TDD versions • FEC performance • Evaluates each individual bit • All LTE MIMO Schemes • modulation Uplink • synchronization & channel estimation eNB • performance measures: thrpt vs SNIR • Support for all LTE BWs General Block Diagram of LTE PHY Lab DOWNLINK 101010111001… 101010111001… MAC Layer eNB PHY TX UE PHY RX UPLINK 101010111001… MAC Layer Multipath Channel eNB PHY RX Copyright © IS-Wireless | Multipath Channel MAC Layer 101010111001… UE PHY TX MAC Layer 12
  13. 13. LTE PHY Lab DL: eNB Transmitter Block Structure Copyright © IS-Wireless | 13
  14. 14. LTE-Advanced in the LTE PHY Lab v.2
  15. 15. LTE PHY LabTM v.2.0 LTE-Advanced Features • Downlink • • • • • • Extended SU-MIMO (up to 8 antennas) Support for Carrier Aggregation with up to 5 Component Carriers Release 9 PRS Release 10 UE Specific RS Release 10 CSI RS eNB Uplink • • • • • • Uplink SU-MIMO for PUSCH (up to 4 antennas) Uplink Spatial Diversity (SORTD) for PUCCH eNB Support for Carrier Aggregation with up to 5 Component Carriers Clustered SC-FDMA New PUCCH format 3 for Aggregated HARQ-ACK Transmission for CA Support Possibility for simoultaneous transmission for PUCCH and PUSCH Physical channels and signals Downlink Uplink Copyright © IS-Wireless | PRS, CSI-RS, UE RS PUCCH format 3 15
  16. 16. LTE PHY Lab v.2.0 DL: eNB Transmitter Copyright © IS-Wireless | 16
  17. 17. LTE MAC Lab – a system level simulator
  18. 18. LTE MAC Lab System Level Simulator Reflects Dynamic Radio System Behavior Main Features of the LTE MAC Lab: • Downlink and Uplink LTE MAC Lab models radio network: • scheduling • interference • mobility • propagation • Multiple Mobiles • Pathloss, shadowing and multipath • RRM functionalities General Block Diagram of 4G System LabTM Packet Traffic Packet Traffic eNB UE 1 MAC MAC L1: PHY L1: PHY Packet Traffic … UE x MAC L1: PHY channel channel LTE PHY Lab LTE MAC Lab Copyright © IS-Wireless | 18
  19. 19. LTE MAC Lab General Algorithm Flow Start Generate channels Generate UEs’ positions and mobility settings t=0 Traffic generation Update UE locations and propagation conditions Scheduling & Link Adaptation PHY Layer abstraction and evaluation for all links t = t+TTI Update results and statistics n t = tend? y Stop Copyright © IS-Wireless | 19
  20. 20. LTE STACKS – LTE L2/L3 Protocols Implementation
  21. 21. LTE STACKS Overview The features of the LTE STACKS implementation include: • Implementation in ANSI-C portable on various hardware platforms • Multi-threading for support of parallelism of several entities • Hardware Abstraction Layer (HAL) for independence on underlying hardware platforms • NAS / RRC interworking (e.g. state machines interworking, NAS message encapsulation within proper RRC message) • NAS / RRC procedures (e.g. taking proper actions upon receiving specific message) • Individual L2 protocol configuration by RRC • RRC encoding / decoding with the use of ASN.1 • L2 processing algorithms (e.g. ciphering, segmentation) • Individual L2 protocol procedures (e.g. data processing) and L2 interworking procedures (e.g. MAC-RLC data exchange) • PDU creation for each L2 protocol • PHY layer parameters configuration (e.g. DCI setting) • RRM functionalities (e.g. scheduler, link adaptation, handover, admission / congestion control) • Support for interworking with GSM and UMTS (e.g. NAS and RRC messages and configuration) Copyright © IS-Wireless | 21
  22. 22. LTE STACKS LTE UE and eNB STACK LTE UE STACK is a complete implementation of UE L2 and L3 protocols according to 3GPP E-UTRA Rel. 10 Copyright © IS-Wireless | LTE eNB STACK is a complete implementation of eNB L2 and L3 protocols according to 3GPP E-UTRA Release 10. It also consists of Radio Resource Management (RRM) framework and supports handling of multiple UE as well as connectivity to other eNB entities and MME. 22
  23. 23. LTE STACKS Supporting Software: LTE TEST TOOL • LTE Test Tool is a supporting application for analysis and high level testing of the LTE STACKS. • LTE Test Tool may be used for LTE protocol testing, verification of implementation and observation of signaling. • It is an application of protocol tester for visualization of both, the behavior and signaling of each protocol, as well as overall inter node (UE and eNB) communications. Copyright © IS-Wireless | 23