lte介紹諾基亞西門子內(nèi)部培訓(xùn)資料(已修改)
2025-01-22 14:28 本頁面
【正文】 1 169。 Nokia Siemens Networks Charles / 20220505 For internal use LTE Overview Sun Changsong LBTS Iamp。V HZ 20220505 For internal use 2 169。 Nokia Siemens Networks Charles / 20220505 Outline ? LTE motivation and background ? 3GPP schedule ? LTE Key Technology ? LTE architecture ? LTE physical Layer ? LTE layer 2/3 ? LTE Peak Bit Rates ? Spectral Efficiency ? Voice evolution in LTE/SAE ? Nokia Siemens Networks LTE 3 169。 Nokia Siemens Networks Charles / 20220505 For internal use LTE motivation and background For internal use 4 169。 Nokia Siemens Networks Charles / 20220505 Wireline evolution pushes higher data rates Wireless data usage requires more capacity Flat rate pricing pushes efficiency LTE expectations Other technologies push wireless capabilities Drivers for LTE HSDPA data packages introduced ? traffic explodes HSDPA data volume Elisa Flat rate 1030 €/month Several customers with 3 TB/day HSDPA traffic 5 169。 Nokia Siemens Networks Charles / 20220505 For internal use 3GPP schedule For internal use 6 169。 Nokia Siemens Networks Charles / 20220505 LTE in 3GPP Release 8 3GPP and Operator Requirements Packet Switched Domain Optimized ServerUE RTT 30 ms Access Delay 300 ms Peak Rates UL/DL 50/100 Mbps Good Mobility and Security Improve Terminal Power Efficiency Frequency Allocation Flexibility with , 5, 10, 15 and 20 MHz Allocations WCDMA evolution work to continue 34 times higher capacity expected than with Release 6 HSDPA/HSUPA reference case Study Phase 2022: 3GPP workshop on UTRAN Long Term Evolution 03/2022 Start of the study 12/2022 Multiple Access selected 03/2022 eNB/Core functional split selected 09/2022 close of the study item amp。 approval of work plan Release 8 Stage 3 Output 06/2022 baseline 09/2022 baseline ? Major PHY updates. 12/2022 baseline ? Major MAC updates. 03/2022 baseline ? Major L3 updates. for RRC. 7 169。 Nokia Siemens Networks Charles / 20220505 For internal use LTE Key Technology For internal use 8 169。 Nokia Siemens Networks Charles / 20220505 The Beauties of LTE Channel only changes amplitude and phase of subcarriers Fast Link Adaptation due to channel behaviour Short TTI = 1 ms Transmission time interval Advanced Scheduling Time amp。 Freq. (Frequency Selective Scheduling) TX RX Tx Rx MIMO Channel DL: OFDMA UL: SCFDMA scalable HARQ: Hybrid Automatic Repeat Request 64QAM Modulation 1 2 2 1 NACK ACK Rx Buffer Combined decoding 9 169。 Nokia Siemens Networks Charles / 20220505 For internal use LTE Architecture For internal use 10 169。 Nokia Siemens Networks Charles / 20220505 Our Key Architectural Concept Flat and Cost effective Mobile Network GSM/EDGE/ UMTS/HSPA Access Core Control WCDMA BTS RNC IMS HLR/HSS LTE / SAE Shift of functionality 2G BTS BSC MSC MGW SGSN GGSN LTE BTS (eNodeB) MME SAEGW MGW ? From CS to PS domain (VoIP), split of functions between eNodeB amp。 aGW ? Interworking, smooth migration, service continuity and investment protection For internal use 11 169。 Nokia Siemens Networks Charles / 20220505 LTE System Architecture e N BM M E / S G W M M E / S G We N Be N BS1S1S1S1X2X2X2E U T R A NFor internal use 12 169。 Nokia Siemens Networks Charles / 20220505 Control Plane User Plane Protocol Stacks MAC L2 eNB S1 RLC PHY PHY eUE eUu L1 aGW L2 L1 IP IP UDP UDP GTPU GTPU PDCP MAC RLC PDCP L2 X2 L1 eNB L2 L1 IP
黨政相關(guān)相關(guān)推薦
鄂ICP備17016276號(hào)-1