Foro3_Preparando La IP RAN Para LTE

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




Arquitectura

Acceso / Transporte

Seguridad

Qos / Sync




Introducción

BTS

O&M

Transport

Network Operation& Optimization &

Services

Radio




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




Arquitectura




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




3GPP Logical Interfaces Required

LTE-Uu

LTE-UuX2u&c

S1c

S1cS1U

S1U

S1U

UE

UE

eNB

eNBeNB

MME

Serving

SAEGateway


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




Acceso / Transporte




TOPOLOGIASCapacidad de

Distribución

Disponibilidad de

red

Conectividad

X2

Costo

Daisy Chain

Tree

Hub & Spoke




TOPOLOGIAS Capacidad de

Distribución

Disponibilidad de

red

Conectividad

X2

Costo

Mesh

Ring




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




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




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)




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




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




Backhaul Evolution Scenarios

Scenario 1 / P2P Fiber

2G/3G/LTEBase Station

Synch E

1588v2

CORE

RNC / BSC / SeGW

Eth METROAGGREGATION




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




L3 IP/MPLS


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





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





Scenario 3 / GPON


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





Scenario 3 / MW Packet

MPR MW

MEF-8

Hub sitegateway


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




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




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




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



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 25

Seguridad





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


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:





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


eUTRAN EPC

AP

AP

AP AP

AP

Ipsec Tunnels:

SecurityGateway

OAM

Ipsec Tunnel

Ipsec Tunnel

X2

X2

X2S1

S1

S1





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





Network QoS





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





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


7EF(46)3(GBR)3

7EF(46)PTP158812

0BE(0)OTHER13

1AF11(10)OAM11

6AF41(34)SCTP10

0BE(0)9(non-GBR)9



5AF42(36)4(GBR)4

7EF(46)2(GBR)2

7EF(46)1(GBR)1

DefaultVLAN

Prioritymapping

DefaultDSCP

mapping

ServiceProfile

Instances



7EF(46)3(GBR)3

7EF(46)PTP158812

0BE(0)OTHER13

1AF11(10)OAM11

6AF41(34)SCTP10

0BE(0)9(non-GBR)9



5AF42(36)4(GBR)4

7EF(46)2(GBR)2

7EF(46)1(GBR)1

DefaultVLAN

Prioritymapping

DefaultDSCP

mapping

ServiceProfile

Instances





Multi-Play Broadband Services QoS





Network Clock& Synchronization





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.





SynchronizationOption #1: E2E PTP

Mobile

BackhaulNetwork

eNodeB

PRC

Remote Hub

1588v2

Grandmaster

1588v2

Client

PTP packets





SynchronizationOption #2: E2E SyncE

Mobile

Backhaul

NetworkeNodeB

PRC

Remote Hub

SyncE





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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Foro3_Preparando La IP RAN Para LTE