LTE系统介绍与无线原理.pptx.pptx

LTE 系统介绍与无线原理第一章 LTE/SAE 介绍?主要内容?解释 E-UTRAN 和 EPC 的背景和结构: ?描述蜂窝网的发展; ?总结 3GPP release 从 R99 到 R8的变革; ?描述 EPS ( E-UTRAN 和 EPC )的逻辑结构; 1、介绍 History ? 1G FDMA (NMT, AMPS, TACS) 80’s - Voice (analog traffic, digital signaling) ? 2G TDMA (GSM, D-AMPS, PDC) and CDMA (IS-95) 90’s - Voice, SMS, CS data transfer ~ kbit/s (50 kbit/s HSCSD) ? TDMA (GPRS) 00’s - PS data transfer ~ 50 kbit/s TDMA (GPRS+EDGE) 00’s - PS data ~ 500kbit/s ? 3- WCDMA (UMTS) and CDMA 2000 00’s - PS & CS data transfer ~ 14-84 Mbit/s (HSPA/HSPA+), Voice, SMS ? OFDMA (LTE/SAE) 10’s - PS Data and Voice (VoIP) for LTE ~ 300 Mbit/s ? 4G IMT Advanced 2017-1-20 5 3GPP Evolution ? HSPA Evolution – gradually improved performance at a low additional cost prior to the introduction of LTE ? LTE – improved performance in a wide range of spectrum allocations HSUPA MBMS Rel 6 MIMO HOM CPC Rel 7 Rel 4 R99 HSDPA Rel 5 Further enhancements WCDMA/HSPA WCDMA HSPA Evolution Rel 8 LTE 4G LTE GSM 2017-1-20 6 LTE is the Global standard for Next Generation – FDD and TDD CDMA Track (3GPP2) GSM Track (3GPP) 2001 2005 2008 2010 LTE FDD and TDD GSM WCDMA HSPA TD-SCDMA CDMA One EVDO Rev A Mobile System Evolution LTE - FDD - TDD 2017-1-20 7 work RNC RNC NodeB NodeB e-NodeB e-NodeB WCDMA LTE/SAE Moving RNC functions to e- NodeB UE UE A flat architecture for optimized performance and cost efficiency SGSN GGSN P/S-GW MME 2017-1-20 8 LTE – Targets ? High data rates – Downlink: >100 Mbps – Uplink: >50 Mbps – Cell-edge data rates 2-3 x HSPA Rel. 6 (@ 2006) ? Low delay/latency – User plane RTT: < 10 ms RAN RTT (fewer nodes, shorter TTI) – Channel set-up: < 100 ms idle-to-active (fewer nodes, shorter messages, – quicker node resp.) ? High spectral efficiency – Targeting 3 X HSPA Rel. 6 (@ 2006 ) ? Spectrum flexibility – Operation in a wide-range of spectrum allocations, new and existing – Wide range of Bandwidth: , 3, 5, 10, 15 and 20 MHz, FDD and TDD ? Sim