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8/22/2019 Foro3_Preparando La IP RAN Para LTE
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COPYRIGHT © 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED. ALCATEL-LUCENT — CONFIDENTIAL — SOLELY FOR AUTHORIZED PERSONS HAVING A NEED TO KNOW — PROPRIETARY — USE PURSUANT TO COMPANY INSTRUCTION 1
Enero 2013
Preparando la red MBH para LTE
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Arquitectura
Acceso / Transporte
Seguridad
Qos / Sync
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Introducción
BTS
O&M
Transport
Network Operation& Optimization &
Services
Radio
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End-to-end Mobile Network
Subscriber Apps
and Services
IMS, Mobile TV, etc.eNodeB
PCRF
SGW
PGW
MME
DevicesLTE
Radio AccessAggregation and
TransportEvolved
Packet CoreService Delivery
Platforms
2G
3G
MW
P2P Fibre
GWCSA
DSL
GPON
Carrier Ethernet
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Arquitectura
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COPYRIGHT © 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED. ALCATEL-LUCENT — CONFIDENTIAL — SOLELY FOR AUTHORIZED PERSONS HAVING A NEED TO KNOW — PROPRIETARY — USE PURSUANT TO COMPANY INSTRUCTION 6
LTE network architecture: 3 GPP requirement
LTE-Uu
LTE-UuX2u&c
S1c
S1cS1U
S1U
S1U
UE
UE
eNB
eNBeNB
MME
Serving
SAEGateway
IP Transport Network (IP Cloud)
eUTRAN EPC
AP
AP
AP AP
AP
S1c
X2u&c
X2u&c
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3GPP Logical Interfaces Required
LTE-Uu
LTE-UuX2u&c
S1c
S1cS1U
S1U
S1U
UE
UE
eNB
eNBeNB
MME
Serving
SAEGateway
IP Transport Network (IP Cloud)
eUTRAN EPC
AP
AP
AP AP
AP
S1c
X2u&c
X2u&c
X2 interface is creating a new requirement for mobile backhaul which never existed before
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Acceso / Transporte
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TOPOLOGIASCapacidad de
Distribución
Disponibilidad de
red
Conectividad
X2
Costo
Daisy Chain
Tree
Hub & Spoke
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TOPOLOGIAS Capacidad de
Distribución
Disponibilidad de
red
Conectividad
X2
Costo
Mesh
Ring
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Capacidad de las Tecnologias de Transporte
60 Mbps
170 Mbps
330 Mbps1 Gbps
10 Gbps
nx10 Gbps
Microwave
Fiber
14 MHz
28 MHz
56 MHz
GPON
XGPON1(asym)
XGPON2(sym)
WDMGPON
2,5 Gbps Pt to Pt
Coppern x 56 MHz
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Backhaul Evolution ScenariosLTE Access Network
Scenario 1:
(Full IP) All radio technologies have migrated to IP
(Converged) Traffic is unified on a single GE interface
Scenario 2:
(Mixed) Legacy TDM & ATM for 2G and 3G(Overlay) LTE traffic is backhauled on a separate network
Scenario 3:
(Mixed) Legacy TDM & ATM for 2G and 3G
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Scenario 1 / Native Packet Backhaul Solutions
Backhaul Solution Transport Type Theoretical Max BW
DSL VDSL2 copper pair bonding •100 Mb/s
ADSL2+ (Annex M) 24 Mb/s (1pair)
96 Mb/s (4pairs)
140 Mb/s (8pairs)
GPON P2MP fibre using optical splitters 2.5 Gb/s DS
1.25 Gb/s DS
P2P Fiber Gigabit Ethernet over fibre pair 1 Gb/s both directions
MW Packet Microwave multi-directional P2P links 313 Mb/s (56MHz&256QAM)
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Backhaul Evolution ScenariosScenario 1 / xDSL
IP DSLAM
xDSL modemRNC / BSC / SeGW
2G/3G/LTEBase Station BITS
ClockReference
METRO
AGGREGATIONCORE
xDSL
(multi-pair
bonding)
Synch E / E1 NTR Synch E / 1588v2
Eth
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2G/3G/LTE
Base Station
Backhaul Evolution ScenariosScenario 1 / GPON
GPONOLT
splitter
METROAGGREGATION
I/O-ONTGPON
lines
CORE
BITSClockReference
E1 / Synch E GPON clock “NTR” Synch E / 1588v2
RNC / BSC / SeGW
Eth
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Backhaul Evolution Scenarios
Scenario 1 / P2P Fiber
2G/3G/LTEBase Station
Synch E
1588v2
CORE
RNC / BSC / SeGW
Eth METROAGGREGATION
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Backhaul Evolution ScenariosScenario 1 / MW Packet
ODUx MHz
Local BS
ODUODU
X MHz
ODU
Hub2RadioSite
Hub1
2G/3G/LTEBase Station
Eth.
Synch E / 1588v2 / E1 prop. clocktransport
Synch E / 1588v2
Eth Eth METROAGGREGATIONMW PDH MW PDH MW PDH
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L3 IP/MPLS
Backhaul Evolution Scenarios
Scenario 2
2G
3G
LTE
MW
P2P Fibre
DSL
GPON
SeGW MME
S/P GW
Optical / MW(STM-1, STM-4,STM-16)
BSC(distributed)
BSC(centralised)
MFS
TC
RNCATM SWDSLAM
completely separate backhaul networks
METROAGGREGATION
Eth
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Backhaul Evolution Scenarios
Scenario 3 / DSL
TDM & ATM Pseudowires
IP DSLAM
Cell SiteGateway BITS
METROAGGREGATION
xDSL
E1 NTR Synch E / 1588v2
2G
ATM
Eth
3G
TDM
LTE
RNC/BSC/SeGW Gateway
BSC
RNC
SeGW/ EPC
IP DSLAM
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Backhaul Evolution Scenarios
Scenario 3 / GPON
TDM & ATM Pseudowires
MTROAGGREGATION
E1 / Synch E GPON clock “NTR” Synch E / 1588v2
2G
ATM
Eth
3G
TDM
LTE
Cell SiteGateway
splitter
GPON
lines
BITS
GPONOLT
BSC
RNC
SeGW/ EPC
RNC/BSC/SeG
W Gateway
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Backhaul Evolution Scenarios
Scenario 3 / MW Packet
MPR MW
MEF-8
Hub sitegateway
TDM & ATM Pseudowires
ATM Aggregation(*)ATM Aggregation
E1 prop. clocktransport
Synch E / 1588v2
2G
ATM
Eth
3G
TDM
LTE
9500 MPR
(MSS)
9500 MPR
(MSS)
METROAGGREGATION
BSC
RNC
SeGW/ EPC
RNC/BSC/SeGW Gateway
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Transport Architecture #1Hub-and-Spoke (VLLs)
7705 SAR
7750 SR
7750 SR
T-LDP PWs
LegendLegend
Active service
Standby service
VLL Service
VLL Service
VLL Service
VID
VID
VID
SDP
SDP
EP
P r i m a r y P W s
S t a n d b y P W s
VPRN Service
SDP SAP
SAP
VPRN Service
SDP SAP
SAP
I GP
w / B F D
I G P w/ B F D
I G P w / B F D
LDP, Static Tunnels
PTP
OAM
CP/UP
•LDP-DU w/ PW redundancy•OSPF/IS-IS or Static routes
•BFD between nodes
To
OAM
SAP
SAP
SAP
SAP
Controllers
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Transport Architecture #2Meshed
Routed Traffic, MP-BGP
7705 SAR
VID
VID
VID
VPRN SDP
SDP
SAP
SAP
SAP
7750 SR
7750 SR
VPRN Service
SAP
SDP
VPRN Service
SAP
SDP
SDP
SDP
SDP
SDP
7705 SAR
VPRN
SDP
SDP SDP
SDP
7705 SAR
VPRN
SDP
SDP SDP
SDP
PTP
OAM
CP/UP
•RSVP-TE with FRR
•CSPF
•OSPF/IS-IS
•BFD between nodes
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Transport Architecture #3Ring
7705 SAR
7705 SAR
7705 SAR
7705 SAR
7705 SAR7705 SAR
7705 SAR
VLL Service
VLL ServiceVLL Service
VID
VIDVID
SDP
SDPEP
7750 SR
7750 SR
VLL Service
SDP SAP
N
W
VLL ServiceSDP SAP
NW
LegendLegend
Primary Path
Standby LSPs
ICB
Steer Path
I GP
w / B
F D
•RSVP-TE with FRR
•CSPF
•OSPF/IS-IS•BFD between nodes
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Seguridad
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LTE network architecture with the Security Gateway
LTE-Uu
LTE-Uu
S 1 - M M
E
S1U
UE
UE
eNB
eNBeNB
MME
Serving
SAE
Gateway
IP Transport Network (IP Cloud)
eUTRAN EPC
AP
AP
AP AP
AP
Ipsec Tunnel:Ipsec Tunnel:
SecurityGateway
OAMIpsec Tunnel
Ipsec Tunnel
S1+X2
S1+X2
S1+X2
Ipsec Tunnel:Ipsec Tunnel:
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LTE network architecture with the Security Gateway
LTE-Uu
LTE-Uu
S 1 - M M
E
S1U
UE
UE
eNB
eNBeNB
MME
Serving
SAE
Gateway
IP Transport Network (IP Cloud)
eUTRAN EPC
AP
AP
AP AP
AP
Ipsec Tunnels:
SecurityGateway
OAM
Ipsec Tunnel
Ipsec Tunnel
X2
X2
X2S1
S1
S1
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Ipsec
OAM VLAN
U VLAN
C VLAN
Usando Tuneles IPSec
MME
SG
Security
Gateway
MMEMME
SGSG
OAM
OAM
OAMOAM Vlan
Option1
Ipsec
OAM Vlan
C-Plane
2
U-Plane
IpsecC-Plane
U-Plane
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Network QoS
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Mobile Backhaul: Typical Requirements
LTE Service
Preliminary estimates
Assumes an E2E ALU LTE solution
Use of other vendors requires additional analysis
KPI Objective
Delay Jitter Loss RateS1-C (control plane) Avg. 5ms < 1 ms 10-7
S1-U (user plane) Avg. 5ms < 1 ms 10-7
X2 (control & user plane) Avg. 10ms < 1 ms 10-7
OAM Avg. 5ms < 1 ms 10-7
1588 PTP Avg. 5ms < 1 ms 10-7
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QOS: Pbit & DSCP
• Marking services DSCP & Pbit
- All packets should be marked at
- Layer 2: ethernet level with the pBit, priority level from 0 to 7
- Layer 3: Ip level with the DSCP field- This is to ensure that the QOS will be maintained in the backhaul, as we could not ensure that the Backhaul will beto able to support the marking at L2 or L3.
5AF42(36)6(non-GBR)6
3AF22(20)7(non-GBR)7
7EF(46)3(GBR)3
7EF(46)PTP158812
0BE(0)OTHER13
1AF11(10)OAM11
6AF41(34)SCTP10
0BE(0)9(non-GBR)9
3AF21(18)8(non-GBR)8
6AF41(34)5(non-GBR)5
5AF42(36)4(GBR)4
7EF(46)2(GBR)2
7EF(46)1(GBR)1
DefaultVLAN
Prioritymapping
DefaultDSCP
mapping
ServiceProfile
Instances
5AF42(36)6(non-GBR)6
3AF22(20)7(non-GBR)7
7EF(46)3(GBR)3
7EF(46)PTP158812
0BE(0)OTHER13
1AF11(10)OAM11
6AF41(34)SCTP10
0BE(0)9(non-GBR)9
3AF21(18)8(non-GBR)8
6AF41(34)5(non-GBR)5
5AF42(36)4(GBR)4
7EF(46)2(GBR)2
7EF(46)1(GBR)1
DefaultVLAN
Prioritymapping
DefaultDSCP
mapping
ServiceProfile
Instances
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Multi-Play Broadband Services QoS
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Network Clock& Synchronization
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SynchronizationTypical Requirements
Frequency Relative Phase Likely Implementations
GSM
W-CDMA FDD
R6/R7 MBMS
50 ppb 10 to 100 ms
Timing over Packet (ACR, DCR, 1588v2)
SyncE
E1/T1 Line timing
LTE FDD 50 ppb 10 to 100 ms
Timing over Packet
SyncE
GPS
eMBMS 50 ppb 12.8 µsGPS
1588v2* and SyncE
CDMA2000 50 ppb 6 µs(20 µs worst case)
GPS
W-CDMA TDD
TD-SCDMA
LTE TDD
50 ppb over one
timeslot2.5 µs
GPS
1588v2* and SyncE
WiMax TDD (802.16e) 8 ppm 1.4 µs GPS
* 1588v2 may require path support to reduce impact of PDV.
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SynchronizationOption #1: E2E PTP
Mobile
BackhaulNetwork
eNodeB
PRC
Remote Hub
1588v2
Grandmaster
1588v2
Client
PTP packets
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SynchronizationOption #2: E2E SyncE
Mobile
Backhaul
NetworkeNodeB
PRC
Remote Hub
SyncE
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SynchronizationOption #3: PTP with on-path support
Mobile
Backhaul
NetworkeNodeB
PRC
1588v2
Grandmaster
1588v2Client
PTP packets
PTP boundary or
transparent clock
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ALCATEL-LUCENT — CONFIDENTIAL — SOLELY FOR AUTHORIZED PERSONS HAVING A NEED TO KNOW — PROPRIETARY — USE PURSUANT TO COMPANY INSTRUCTION 38