lte-fdd系统原理与网络建设.pdf

LTE FDD系统原理 和网络建设 内容 1.关键技术 (1)DL: OFDMA，UL:SC-FDMA (2)MIMO和Transmit diversity (3)MAC调度与HARQ (4)Power Control (5)Rondom Access (6)Cell Search (7)SON (8)ICIC 2.空口消息过程 (1)接入过程 (2)切换过程 3. 网络设计与建设 (1)室内覆盖 (2)室外覆盖 (3)多系统共存的干扰分析 All Rights Reserved © Alcatel-Lucent 2008 1关键技术 All Rights Reserved © Alcatel-Lucent 2008 蜂窝无线接入系统演进表 WiMAX 802.16e-2005 WiMAX 802.16m OFDM All-IP MIMO AAS OFDM All-IP MIMO AAS CDMA2000 EV-DO Rev.A EV-DO Rev.C IP transport OFDM All-IP MIMO AAS 3G LTE HSDPA / HSUPA HSPA+ IP Transport MIMO All-IP OFDM All-IP MIMO AAS 2006 2007 2008 2009 2010 Beyond OFDM, All-IP, MIMO AAS are the key cornerstones of new future wireless standards All Rights Reserved © Alcatel-Lucent 2008 3GPP Requirements For LTE Spectrum efficiency DL : 3-4 times HSDPA for MIMO(2,2) UL : 2-3 times E-DCH for MIMO(1,2) Frequency Spectrum : Scalable bandwidth : 1.4, 3, 5, 10, 15, 20MHz To cover all frequencies of IMT-2000: 450 MHz to 2.6 GHz Peak data rate (scaling linearly with the spectrum allocation) DL : 100Mb/s for 20MHz spectrum allocation UL : 50Mb/s for 20MHz spectrum allocation Capacity 200 users for 5MHz, 400 users in larger spectrum allocations (active state) Latency C-plane : 100ms to establish U-plane U-plane : 10ms