VIEWS: 260 PAGES: 19 CATEGORY: Mobile Devices POSTED ON: 8/5/2010
3G Long Term Evolution is the evolution of the project, began in Toronto in 2004 3GPP meeting. LTE is not 4G technology is widely misunderstood, but between 3G and 4G technology as a transition, is the global standard for 3.9G, 3G is to improve and enhance air access technology, using OFDM and MIMO for its wireless network evolution the only criterion. 20MHz of spectrum in the downlink bandwidth to deliver 326Mbit / s and uplink 86Mbit / s peak rate. Improve the performance of cell edge users, increase cell capacity and reducing system latency.
LTE Overview NEC Corporation May 21st, 2008 K. Jay Miyahara Corporate Chief Engineer Mobile Network Operations Unit 1 Kjemail@example.com Mobile Evolution 1992 2002 2005 2008 2013 Mobile Personalised Video Media Services Voice SMS MMS Calls Clips Mobile TV Triple Play/ Localised Gaming Services HSUPA LTE HSPA+ Technology GSM GPRS UMTS HSDPA MBMS IMS OFDM 4G IP transp. access Interactive Anywhere User Real time Voice and Text Download Information Anytime Expectations delivery Swapping Anyhow Bundled Services User Centric, Operators Voice Centric, Multimedia Centric, @ home, office, FMS/FMC & NGN Strategy Coverage Capacity Indoor Coverage (All IP) Ｐage 2 User Expectations • Low prices – value for money connectivity High speed Email access Location Services • Higher quality (increased speed and availability – Financial Video Services Conferencing Broadband everywhere) • Simplicity and value added Music Download Blogging Video Download Browsing • Flexibility (personalised and more flexible tariff plans) Mobile TV Gaming • Multitude of services (new services) • Ubiquity (anywhere, anytime) Positioning SMS Photos Voice • Technology Agnostic (use any device, use one device) MMS Ｐage 3 Mobile Operators Expectations Higher data rate and reduced latency for multimedia rich Data rate applications (competitiveness of overall customer proposition with and latency rival technologies) Architecture Architecture simplicity and reduced protocol complexity Mobility Seamless handover ensuring service continuity with legacy systems Reduced migration, capital and operational costs (CAPEX/OPEX), Cost of ownership Investment protection by reusing existing assets Spectrum Greater efficiency and flexibility Ｐage 4 Data Volume is Increasing Mobile Operators will have to invest in NW expansion to handle the increase in traffic Mobile Data Revenue as % of Total Revenue Forecast Growth in Service Traffic for a Typical Mobile User in a Developed Market 26 24 22 20 18 16 2001 % 14 2005 12 10 8 6 4 2 0 UK FRA GER ITA JPN ESP NED SWE IRL Source: iDATE Source: Analysys Ｐage 5 World Forecast per Service Category Total World Usage Forecast - Voice and Data Services 1 600 000 1 400 000 1 200 000 Machine to Machine 1 000 000 Corporate Services Terabytes per Year M-Commerce and Finance Multimedia Communication 800 000 Rich Multimedia information and entertainment Multimedia Messaging Simple Information and Entertainment 600 000 Simple Messaging and Community Services Voice Communication 400 000 200 000 - 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 Source: Report ITU-R M.2072 “World mobile telecommunication market forecast” Ｐage 6 Need for Network Evolution Faster, Simpler, More Efficient, Cheaper Highly efficient radio technology Increased spectrum efficiency for larger carriers and therefore increase capacity Lower cost per bit and lower prices for the end user Simplified protocol stack & all IP network Reduced latency Easier network management CAPEX and OPEX savings Flexibility and scalability in deployment Operating in various frequencies and bandwidths Operators can start with smaller deployment and increase bandwidth as demand increase Supports resource aggregation of radio band resources Ｐage 7 Future Services Empowered by LTE Both technologies can support the same services. Main difference is service latency and throughput for the user! • Rich Voice • Mobile TV • Communities/Blogging • High Speed Access • Banking • Video Telephony • Video on Demand • Gaming • Email • Mobile Payment • SMS/MMS • Music • Photo/Video Sharing • Mobile Conferencing • Mobile Advertising Same Services. Different Experience Ｐage 8 Experience Comparison Both technologies can provide high speed rich multimedia services 3G LTE Person-to-Person Real time audio, poor video VoIP, rich quality video Communications quality conferencing Content Streamed and Broadcast TV, true on Delivery downloadable content demand high quality video Social Downloadable online games, Real time gaming experience, Networking online access of information sharing of rich content Business Access to limited online Fixed-like access experience, Services information and basic web sites mobile intranet/extranet Payment transactions and Mobile is a secure payment M-Commerce facilities over mobile device Ｐage 9 Comparison b/w HSPA+ and LTE -System Architecture- One RAN node: eNB Core Network Evolved Packet Core (SAE) MME logical node Operator’s IP NAS Security service network Idle State Mobility SGSN GGSN Serving MME SAE Bearer Control Gateway IP SAE Gateway logical node Mobility Anchoring S1-MME S1-MME Iu Iu eNodeB logical node Iur S1-U Inter Cell RRM RNC S1-U Radio Admission RNC Control UTRAN ATM/IP IP Radio Bearers Control Iub transport transport <HSPA+> Iub Handover NB NB Scheduling eNB PDCP eNB X2 RRC function MAC/RLC EUTRAN (LTE) PHY Ｐage 10 Comparison b/w HSPA+ and LTE -System Specification- HSPA+ LTE Spectrum 3G spectrum (2GHz and additional bands) Radio Access Downlink: OFDMA DS-WCDMA Uplink: SC-FDMA RAN Latency <50 ms <10 ms Carrier Bandwidth 5MHz 1.4, 3, 5, 10, 15, 20MHz Data rate 57.6Mbps (uplink, 1x2) 11.52 Mbps (uplink) 172.8Mbps (downlink, 2x2) 42 Mbps (downlink, 2x2) 57.6 Mbps (uplink, 1x2) 326.4Mbps (downlink, 4x4) Services Packet Switched Packet Switched Ｐage 11 Comparison of other technologies HSPA (FDD) HSPA+ (FDD) EV-DO Rev. A EV-DO Rev. B Channel Width 5 MHz 5 MHz 1.25 MHz 1.25 MHz x N Peak Rate (DL) 14.4 Mbps 21.6 Mbps 3.1 Mbps 4.9 Mbps x N 43.2 Mbps 14.7 Mbps@N=3 (2x2 MIMO) Peak Rate (UL) 5.7 Mbps 11.4 Mbps 1.8 Mbps 1.8 Mbps x N 5.4 Mbps@N=3 Modulation (DL) ～16 QAM ～64QAM ～16QAM ～64QAM Modulation (UL) ～BPSK ～16 QAM ～8PSK ～8PSK Ｐage 12 Comparison b/w HSPA+ and LTE -Technical details- HSPA+ LTE NW Structure HSPA+ NB RNC CN-PS eNB EPC Transport Mixed ATM &IP, possible all IP All IP MIMO Support Yes (up to 2x2 in downlink Yes (up to 4x4 in downlink No MIMO in uplink) And 2x2 in uplink) Modulation QPSK+16QAM for E-DCH Extra 64QAM for HS-DSCH QPSK+16QAM+64QAM Support MBMS Yes (limited capacity via FACH) Yes (enhanced capacity via DL-MCH) Ｐage 13 Scope of 3GPP Technology Specifications Group TSG-SA Service & System Aspects TSG-RAN CN Radio Access Networks GMSC LMSC CS CS Domain Domain PSTN UTRAN SGSN GGSN Node-B RNC PS PS UE Domain Domain Internet TSG-CT Core Network & Terminals Ｐage 14 3GPP Rel8-LTE Standardization 2007 2008 2009 Dec Mar Jun Sep Dec Mar Jun Phy ch, Modulation F Coding F RAN1 Procedure F Measurement F UE Idle mode A F UE capability A F MAC A F A: Approval RAN2 RLC A F PDCP A/F F: Functionally RRC A F F Freezing Protocol&Tabular ASN.1 Layer 1 A F Sig. transport A F RAN3 Data transport A F Protocol A F F Protocol&Tabular ASN.1 UE Tx/Rx A/F RAN4 eNB Tx/Rx A/F RRM A F eNB Test A/F Common env. A RAN5 Signaling A RF A 出典：3GPP RP-071019 Ｐage 15 Migration Scenario + HSPA+(RAN) HSPA+(RAN) HSPA+(RAN) HSPA+(RAN) 3G (CN) 3G (CN) Pre-SAE (CN) Pre-SAE (CN) Ｐage 16 How Japanese market moves towards LTE? DoCoMo selected LTE (2.1GHz, Band1, currently used for 3G) NEC plans to deliver commercial product without DoCoMo specific application at e/2008. SBM planning to introduce LTE on 1.5GHz (Band11, currently used for PDC). KDDI under investigation between LTE or UMB (Ultra Mobile Broadband) Ｐage 17 Conclusion • End-user needs already exists/beginning to see the onset. • Operators needs exists • Industry activities such as LSTI, NGMN are already in place to assure inter-operability and alignment of technology/standards/market requirements/spectrum • Many operators are planning to deploy LTE starting 2010 Ｐage 18
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