LTE Network Architecture, Interfaces and Radio Access Sanne STIJVE Business Development Manager, Mobile Broadband Ericsson 1
LTE/EPC Architecture & Terminology S1 enodeb MME X2 X2 P/S GW X2 enodeb EPC Evolved Packet Core E-UTRAN LTE Long Term Evolution EPS Evolved Packet System enodeb UE UE User Equipment UE
LTE/EPC Network Architecture GERAN UTRAN SGSN HSS S3 S6a S1-MME MME PCRF S11 S4 S7 Rx UE LTE-Uu E-UTRAN S10 S1-U Serving Gateway S5 PDN Gateway SGi IP Services (e.g. IMS, PSS etc.)
LTE / EPC concept: EPS Bearer Concept E - UTRAN EPS EPC IMS PDN (or internet) UE enb SGW / PDN-GW Peer EnDty End - to - end Service EPS Bearer Service External BS E-UTRA Radio BS E-UTRAN Access BS Physical Radio BS Transport NW Uu S 1 SGi
What about telephony in relagon to LTE? (IMS) IMS : IP MulDmedia Subsystem IMS is an all-ip network for muldmedia services Main driver is Voice over LTE (VoLTE) GSM 3G GSM Circuit switched Core Security Applications Conferencing sharing Collaboration Presence messaging Multimedia telephony IPTV Quality Reach IMS IP Charging Authentication HSPA WCDMA Packet Core DSL WLAN PSTN LTE LTE
LTE Air Interface Downlink Adap%ve OFDM Channel-dependent scheduling and link adapta%on in %me and frequency domain User #1 scheduled Δf = 15 khz User #2 scheduled User #3 scheduled Uplink SC-FDMA with dynamic bandwidth (Pre-coded OFDM) Higher power efficiency Reduces UE costs and enhances bajery life%me frequency frequency 180 khz
LTE Air Interface MulD-Antennas, both enodeb & UE TX & RX diversity, interference rejec%on, MIMO, antenna beams High bit rates and high capacity TX RX Flexible bandwidth Possible to deploy in 6 different bandwidths up to 20 MHz 1.4 3 5 10 15 20 MHz Harmonized FDD & TDD concept Maximum commonality between FDD and TDD f DL f UL FDD-only f DL/UL TDD-only
LTE Cell capacity 3 MHz 5 MHz 10 MHz 20 MHz Downlink with 2x2 MIMO Uplink (no MIMO) 22 Mbit/s 37 Mbit/s 75 Mbit/s 150 Mbit/s 11 Mbit/s 22 Mbit/s 37 Mbit/s 75 Mbit/s Further increase of capacity: Add bandwidth (Carrier Aggrega%on) Use MIMO 4x4, or even 8x8 Use advanced modula%on (e.g. 256 QAM)
LTE s enodeb Main-remote concept Remote Radio Units Jumpers Or Radio Ba]ery Backup Radio Base StaDon Baseband Or Digital Unit CPRI interface
LTE UE Categories UE Category 1 2 3 4 5 6 7 8 DL Peak Rate 10 50 100 150 300 300 300 3000 UL Peak Rate 5 25 50 50 75 50 100 1500 Max bandwidth 20 MHz 40 MHz 100 MHz Max DL mod 64QAM Max UL mod 16QAM 64QAM 16QAM 64 QAM DL MIMO * No 2 4 2 or 4 8 UL MIMO * No 2 4 LTE Devices for Public Safety: * : number of layers for spatial mux Vehicle Modem
LTE Broadcast - SoluGon Overview LTE Broadcast offers MulDcast capabilides CONTENT SERVICE BMC enb/mce MME MBMS GW File Live encoder BDC delivery enb/mce LTE RAN EPC Content stores New network element Control Plane User Plane
Public Safety LTE Architecture PTT Application PTT Application Broadband Applications Tetra / P25 Core Management Center Public Safety LTE Core Tetra / P25 access Dedicated LTE access Commercial Mobile Network Operator Broadband devices
Thanks! Sanne STIJVE Business Development Manager, Mobile Broadband Ericsson 13