LTE Network Architecture, Interfaces and Radio...
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Transcript of LTE Network Architecture, Interfaces and Radio...
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
LTENetworkArchitecture,InterfacesandRadioAccess
SanneSTIJVEBusinessDevelopmentManager,MobileBroadband
Ericsson
1
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
LTE/EPCArchitecture&Terminology
MME P/S GW
eNodeB
eNodeB
eNodeB
S1
EPC Evolved
Packet Core
E-UTRAN
LTE Long Term Evolution X2 X2
X2
EPS Evolved Packet System
UE UE User Equipment UE
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
LTE/EPCNetworkArchitecture
SGi
S4
S3
S1-MME
PCRF S7
S6a
HSS
S10
UE
GERAN
UTRAN SGSN
LTE-Uu
”
E-UTRAN
MME
S11
S5
Serving Gateway
PDN
Gateway
S1-U
IP Services (e.g. IMS, PSS etc.)
Rx
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
LTE/EPCconcept:EPSBearerConcept
SGW/PDN-GW Peer
EnDtyUE eNB
EPSBearerService
E-UTRARadioBS E-UTRANAccessBS
End -to-endService
ExternalBS
Uu SGi
IMSPDN(orinternet)
Physical RadioBS TransportNW
S1
E-UTRAN EPCEPS
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
DSL WLAN PSTN
IP
Conferencing – sharing – Collaboration – Presence – messaging – Multimedia telephony –
IPTV IMS
Applications
Security Reach
Authentication
Charging
Quality
WhatabouttelephonyinrelaGontoLTE?(IMS)
• IMS:IPMulDmediaSubsystem• IMSisanall-IPnetworkfor
mulDmediaservices• MaindriverisVoiceoverLTE(VoLTE)
3G
HSPA
GSM
GSM
Packet Core
LTE
WCDMA
Circuit switched
Core
LTE
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
LTEAirInterface
Downlink– Adap%veOFDM– Channel-dependentschedulingandlinkadapta%onin%meandfrequencydomain
Uplink– SC-FDMAwithdynamicbandwidth(Pre-codedOFDM)
– Higherpowerefficiency– ReducesUEcostsandenhancesbaJerylife%me frequency
frequency
Δf = 15 kHz
180 kHz
User #2 scheduled User #1 scheduled
User #3 scheduled
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
LTEAirInterface
• Flexiblebandwidth– Possibletodeployin6differentbandwidthsupto20MHz
• HarmonizedFDD&TDDconcept– MaximumcommonalitybetweenFDDandTDD
• MulD-Antennas,botheNodeB&UE– TX&RXdiversity,interferencerejec%on,MIMO,antennabeams
– HighbitratesandhighcapacityTX RX
10 15 20 MHz 3 1.4 5
fDL
fUL
FDD-only
fDL/UL
TDD-only
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
LTECellcapacity
• Furtherincreaseofcapacity:– Addbandwidth(CarrierAggrega%on)– UseMIMO4x4,oreven8x8– Useadvancedmodula%on(e.g.256QAM)
3MHz 5MHz 10MHz 20MHz
Downlinkwith2x2MIMO
22Mbit/s 37Mbit/s 75Mbit/s 150Mbit/s
Uplink(noMIMO)
11Mbit/s 22Mbit/s 37Mbit/s 75Mbit/s
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
JumpersRemoteRadioUnitsOr
Radio
CPRIinterface
BasebandOr
DigitalUnit
Ba]eryBackup
LTE’seNodeBMain-remoteconcept
RadioBaseStaDon
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
LTEUECategoriesUE 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
* : number of layers for spatial mux
VehicleModem
LTEDevicesforPublicSafety:
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
LTEBroadcast-SoluGonOverview
• LTEBroadcastoffersMulDcastcapabiliDes
LTE RAN EPC
File
delivery
eNB/MCE
MME
BMC
BDC
CONTENT SERVICE
Live encoder
Contentstores
MBMS GW
eNB/MCE
New network element Control Plane User Plane
Presenta(ononbehalfoftheTETRA+Cri(calCommunica(onsAssocia(on
PublicSafetyLTEArchitecture
Broadband devices
Management Center
Public Safety LTE Core
Dedicated LTE access
Broadband Applications
Tetra / P25 Core
Tetra / P25 access
Commercial Mobile Network Operator
PTT Application
PTT Application