huawei transport solution

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

Security Level:

47pt

30pt

Color::white

:

FrutigerNext LT Medium

Font to be used by customers and

:

Arial

www.huawei.com

LTE Transport Solution

Huawei


35pt


partners :

18pt


partners :

Huawei LTE Transport Solution

LTE Transmission Key Technologies

LTE Transmission Network Requirements

LTE Transport Network Interface

Content


35pt


partners :

18pt


partners :


The Transmission network of LTE consist of:

S1 interface

X2 interface

The data to be transmitted over the transmission network are:

S1 interface data including S1 Control Plane (S1-C) and S1 User Plane (S1-U) data

X2 interface data including X2 Control Plan (X2-C) and X2 User Plane (X2-U) data

OAM, Operation And Maintenance data

Clock synchronization data

Note that S11 interface is part of the core network, so its specification is not covered by eRAN

transport solution.

X2 (X2-C, X2-U)

S1

-C S1

-U

OAM

Clock server

eNodeB eNodeB

S11

MME S-GW


35pt


partners :

18pt


partners :

Content






35pt


partners :

18pt


partners :

…

LTE

…

…

Security

QoS SON

ReliabilityMaintainability

Co-transmission

LTE Transmission Requirements

Traditional Transmission Network


35pt


partners :

18pt


partners :

Bandwidth Requirement

• Bandwidth demand will be multiplied by 3~10 time in 2011 and beyond

• The transmission network technology must keep up with the access technology development

• Operators are looking for a mobile transmission network solution that is able to provide enough

bandwidth to support the access technology traffic flow while saving CAPEX and OPEX.

2002-2003

64~144 kbps

2003-2004 2005-2006 2006-2009 2008-2012 2009-2015

64~384 kbps

384 kbps ~

5 Mbps

3~20

Mbps

10~50

Mbps

Access technologies

Service

Bandwidth

3G(R99/R4)

UL: 384 Kbps

DL: 384 Kbps

3G/HSDPA(R5)

UL: 384 Kbps

DL: 14.4 Mbps

3G/HSxPA(R6/R7)

UL: 5.76 Mbps

DL: 14.4 Mbps

3G/HSPA+(R8)

UL: 11 Mbps

DL: 42 Mbps

LTE

UL: 50 Mbps

DL: 100 Mbps

2011-?

100~1000

Mbps(?)

LTE-advanced

UL: 500 Mbps(?)

DL: 1000 Mbps(?)

20~100

Mbps


35pt


partners :

18pt


partners :

Synchronization Requirements

1. Frequency stability requirements

• For eNodeB, the frequency accuracy should be better than 0.05 ppm

2. Phase/time requirements

• For eMBMS SFN, the time accuracy should be better than 4s

• For TDLTE, the time accuracy should be better than 1.5s


35pt


partners :

18pt


partners :

QoS Requirements

AMBR: Aggregate Maximum Bit Rate ~ QCI: QoS Class Identifier ~ CoS: Class of Service ~ GBR: Guaranteed Bit Rate

QCIResource

TypePriority

Packet Delay

Budget

Packet Error

Loss RateExample of Services

1

GBR

2 100 ms 10-2 Conversational Voice

2 4 150 ms 10-3 Conversational Video (Live Streaming)

3 5 300 ms 10-6 Non-Conversational Video (Buffered Streaming)

4 3 50 ms 10-3 Real Time Gaming

5

Non-GBR

1 100 ms 10-6 IMS Signaling

6 7 100 ms 10-3 Voice, Video (Live Streaming) , Interactive

Gaming

7 6

300 ms 10-6

Video (Buffered Streaming)

8 8TCP-based (e.g., www, e-mail, chat, ftp, p2p file

sharing, progressive video, etc.)

9 9

Compared to 2G/3G network, transmission over LTE backhaul required reduced and strict

packet delay and packet error loss rate


35pt


partners :

18pt


partners :

Security Requirement

Tunnel mode IPSec Transport mode IPSec

The eNodeB should support IPSec tunnel mode, and IPSec transport mode is optional

LTE

IPSec function

eNB eNB

IPsecIPsecIPsec

SEGIPsec

MME S-GW

eNB

Security gateway

IPsec

eNBeNB

MME S-GW

eNB eNB

IPsec IPsec

IPsec IPsec IPsec IPsec

eNB

• 3GPP has defined no security for the backhaul, i.e. the transmission between eNodeBs

and between the eNodeB and MME/S-GW

• For non-trusted network, IPSec should be used.


35pt


partners :

18pt


partners :

Reliability Requirement

Backhaul

transport network Protection path

eNode B

Traffic flow protection

Port

redundancy

Board

redundancy

Control Plane

User Plane

OAM data

Clock data

S-GW/MME

Traffic flow protection

Board

redundancy

Port

redundancy

Control Plane

User Plane

Backhaul

transport network

Work path

Protection path

Work path

Protection

path

Transport layer

Network layer

Data link layer

PHY layer

Transport layer

Network layer

Data link layer

PHY layer

(S1 interface)

Segment-by-segment redundancy

End-to-end redundancy

OAM

backup

Clock Server

(optional)

Work path

Redundancy: the eNodeB and backhaul should provide different redundancy solutions based on

backhaul design, this must include port redundancy and board redundancy.


35pt


partners :

18pt


partners :

Maintainability Requirement

• Network Management Quality:

• Service quality Monitoring

• Fault prediction (active maintenance)

• Fault location and fast recovery

eNode B

S-GW/MME

Transport

network

Transport

equipmentTransport

equipment

eNode B

GE/FE

End-to-end (S1 interface)

End-to-end

(X2 interface)Seg-by-Seg

• Two scenarios

• E2E maintenance

• Segment by segment maintenance


35pt


partners :

18pt


partners :

Co-transmission Requirement

• LTE will co-exist with legacy network for longtime

• Transmission sharing with legacy network (co-sitting with

2G/3G network)

• Simultaneous use of different technologies (IP, TDM)

• Maximum reuse of existing resource is a big challenge

eNode BUMTS

Node B

S-GW

eNode BGSM BTS

RNC

GSM BSC

Backhaul

transmission

networkMME


35pt


partners :

18pt


partners :

Self-

maintenance:

Automatic

Neighbor

Relation

Self-

optimization:

routing

optimizationSelf-

deployment:transport parameters

setup

Self-planning: transport parameters planning

SON Requirement

The main functions of SON

include: self-planning, self-

deployment, self-optimization

and self-maintenance.

The main goal of SON is to

minimize transport operational

effort and cost, and to increase the

network performance and quality.

With the lack of RNC, SON is used to

facilitate the communication among

eNodeBs that are linked directly to the

backhaul and distributed in the network.


35pt


partners :

18pt


partners :

Content






35pt


partners :

18pt


partners :

PoC: Point of Convergence

Mobile Backhaul Structure

eNodeB

eNodeB

eNodeB

TDM MW or Packet MW

VDSL

GPON

P2P fiber

FE/GE

RNC/GGSN/S-

GW/MME/HSS/HLS/O

AM/…

Access Metro/aggregation Core

Backhaul

PoC3 PoC2 PoC1

LTE SAE

• Mobile backhaul can be divided into access layer, metro/aggregation layer and the core

layer.

• The part of the access layer that is connected to the eNodeB is called the last mile solution.

It consist of the most important part of the transport solution.

• However, the transmission networking includes also synchronization, QoS, security,

reliability, maintainability and SON different key technologies.


35pt


partners :

18pt


partners :

The Last Mile Bandwidth Solution 11

Ethernet packet microwave: low TCO and high capability

Dynamic Adaptive Modulation can dynamically improve the spectrum efficiency,

providing more transport bandwidth. It can increase the bandwidth efficiency up to

400%

Packet microwave access


35pt


partners :

18pt


partners :

The Last Mile Bandwidth Solution 2

DSLA

M

ONU

Splitter

GPON

ADSL2+/SHDSL/VDSL2

modem

Mini DSLAM

ONU

eNodeB

eNodeB

eNodeB

MME/S-GW

/PDN GW

GE

GE

FE

GE

P2P fiber/VDSL2 support flexible capacity upgrades once the base stations are connected

An ADSLVDSL/GPON co-platform DSLAM

Carrier grade IP DSLAM

2 P2P Fiber/ADSL/VDSL/GPON access

Technology ADSL2+/VDSL2/G, SHDSL,.

copper Based VDSL2

Fiber-based: GPON/P2P

Distance <1km >5km

bandwidth >25 Mbps >=100Mps

eNodeBP2P fiber

transport network


35pt


partners :

18pt


partners :

eNode B

BITS

GPS

legacy BS

E1/T1

Clock over IP@Eth

BITS orClock server

FE

clock path

S-GW/

MME

Sync. Ethernet

IEEE 1588v2

(Clock client)

FE/GE

Traditional network

IP/Ethernet

Network

Frequency synchronization

① GPS

② BITS

③ From legacy base station when co-sites

④ IEEE1588v2

⑤ E1/T1 line clock (if E1/T1 used)

⑥ Huawei clock over IP @Ethernet

⑦ Synchronous Ethernet

⑧ 1PPS

1

2

3

5

4

6

7

8 1PPS+ TOD

Time or phase synchronization

① GPS

⑤ IEEE1588v2

⑧ 1PPS+ TOD

• Provide E2E clock solution

• Support clock redundancy

• Unified clock server solution for LTE and legacy BTS

• The clock server can be either a stand alone equipment or integrated in S-GW/MME/OMC

• Moreover, When all external clock sources are lost, the internal clock of the eNodeB, OXCO can keep it on normal

service up to 90 days.

• Compares to GPS, IEEE1588v2 is cost-effective and suit better to indoor coverage

Flexible Synchronization Solution


35pt


partners :

18pt


partners :

E2E QoS Solution

1. Qos Mapping

• Traffic QoS: user plan traffic ( based on QCI, GBR, Non-GBR, priority), signaling, IP clock and OAM data.

• IP layer: DSCP marking, DiffServ

• Data link layer: Ethernet Qos (IEEE802.1P/Q), VLAN based traffic separation.

2. Traffic shaping

• Logical port shaping

• Physical port shaping

Etuser 1

user 2

user n Internet

VoIP

Video

Mobile

user 3

Service differentiation

QoS mapping

Traffic shaping

Scheduling

Transport resource allocation

Congestion control

Admission control

IP/ MPLS network

PE

PE

eNodeB

eNodeB

MME/S-GW

/PDN GW

IEEE802.1P MPLS TE/IP DiffServ IEEE802.1P/DSCP

Pre-marker DSCP and CoSClassify accordingly to DSCP or CoSPre-marker DSCP and CoS

MPLS: Multi Protocol Label Switching ~ SDSCP: Differentiated Service Code Point ~ CoS: Class of Service


35pt


partners :

18pt


partners :

L2VPN and L3VPN Comparison

Feature Layer 2 VPLS Layer 3 MPLS

Dynamic Path establishment Supported with VPLS Supported with MPLS

Ability to route between directly

connected cell site

Not supported if on separate broadcast

domain (Layer3 needed to go between

broadcast domains)

Supported

End-point Identification Mac address IP address

IP address transparency Supported Not supported without layer 3 VPNs

CAPEX Less expensive More expensive

OPEX Lower Higher

QoS capability Low Higher

Broadcast domains Supported (both point-to-point and

multi-point)

Not supported in routed network

Network expansion Manual effort configuration-intensive Easier with support of Automatic

Discovery


35pt


partners :

18pt


partners :

Security Solution

SSL tunnel for OAM data

IPSec for all traffic over S1 interface and X2 interface

IPSec tunnel mode is recommended, but the transport mode can also be used

If required, IPSec and SSL can be used together for AOM data protection

ACL for firewall

SSL - Security Socket Layer ~ ACL-Access Control List

1. Scenarion1: Non- trusted network

Air interface: ciphering, SNOW 3G and AES.

Transport module and transport equipment: the target is to try to keep security

breaches as local as possible by using a security gateway.

FE/GEIP/Ethernet network

(Non-trusted)

Security

Gateway

S-GW/MME

IP/Ethernet network

(trusted)

FE/GE

eNodeB

IPSec tunnel for all traffic flow on S1/X2

SSL tunnel for OAM data

OMC

The eNodeB supports IPsec

eNodeB


35pt


partners :

18pt


partners :

Ethernet

Security Solution

IP/MPLS

Network

PE

PE

PE

eNodeB

eNodeB

S-GW/MME

VLAN for Ethernet network

MPLS VPN for IP/MPLS network

VLAN for Ethernet network

2. Scenario2: Trusted network

PE: Provider Edge ~ LSP: Label Switch Path

Ethernet


35pt


partners :

18pt


partners :

Reliability Solution

IP/MPLS

Network

S-GW/MME

GE

route backup:active route + backup route

eNodeB

eNodeB

Ethernet Trunk

Switch/router

RouterGE

GE

GE

BFD - Bidirectional Failure Detection; ARP - Address Resolution Protocol.

eNodeBeNodeBeNodeBeNodeBeNodeBeNodeB

S-GW S-GW

S-GW

MME

eNodeB

S-GW Pool

MME Pool

eNodeB

E-UTRAN

MME

S1-flex

S/R

Ethernet

eNodeB

1. Reliability solutions: S1-flex, OAM

channel backup, IP routing backup and

Ethernet trunk

2. Failure detection Mechanism: BFD,

ARP and Ethernet OAM


35pt


partners :

18pt


partners :

Maintainability Solution

eNodeB

IP/MPLS

802.3ah

802.1ag

router

FE/GE

802.3ah

FE/GE

router router

router

802.1ag

802.1ag

S-GW

/MME

BFD: Bi-directional Failure Detection ~ GTP-U: GPRS Tunnel Protocol- User Plane ~ UDU: User Data Protocol ~ SCTP: Stream Control Transmission Protocol

IP/Ethernet

Access link OAM: IEEE802.3ah, ARP

Connectivity OAM: IEEE802.1ag

Service Layer OAM: BFD, GTP-U OAM, UDP OAM, SCTP OAM


35pt


partners :

18pt


partners :

Co-transmission Solution

Legacy BSC/RNC

TDM/ATM

Legacy BTS(2G BTS or UMTS NodeB)

GEGETGW/Router

GE

eNodeB

TGW/Router

S-GW/MME

nE1/T1,STM-1

Co-located

LTE eNodeB co-location with traditional legacy base station

Multi-mode base station or eNodeB co-location with IP-based legacy base station

BSC/RNC

S-GW/MME

eNodeB E1/T1, FE/GEMulti-mode

eNodeB

eNodeBIP-based

2G/3G

E1/T1, FE/GE

FE/GE

GE

IP/Ethernet

Network

IP/Ethernet

Network

Scenario 1

Scenario 2

PW emulation for ATM/TDM

traffic over Ethernet

TGW: Transport Gateway ~ PW: Pseudo Wire


35pt


partners :

18pt


partners :

Intelligent SON Solution

1. IP address allocation through DHCP and OAM channel establishment

2. Configuration parameters download

3. S1 interface configuration and setup

4. X2 interface configuration and setup

5. Clock server channel configuration and setup

Neighbor eNodeB

S1

eNodeB

NE/NMS

DHCP Server

ACS

SGW / MME Pool

1

2

3

4X2

BITS / Clock server

5


35pt


partners :

18pt


partners :

X2 interface implementation Solution

S-GW/MME

eNodeB

eNodeB

eNodeB

S1

PoC2 PoC1

X2

1. Distributed Solution

• The X2 and S1 interfaces share the same physical interface, and X2 interface is established

through the nearest PoC equipment between the two eNodeBs

• Advantage: reduced X2 data delay and packet loss, save the metro and core network

transmission bandwidth

• Disadvantage: complex transmission equipment configuration and management, the addition of

new eNodeB requires the transmission network reconfiguration and planning.

PoC: Point of Convergence

CoreMetro Last mile

PoC3


35pt


partners :

18pt


partners :

X2 interface implementation Solution

S-GW/MME

eNodeB

eNodeB

eNodeB

S1

PoC1PoC2

X2

2. Convergence Solution ( recommended)

• The X2 and S1 interfaces share the same physical interface, and X2 interface is established through

the PoC1 equipment

• Advantage: easy transmission network planning and management, simple configuration . Moreover,

the PoC2 and PoC3 equipments do not required complex routing functions. Therefore reduce the

transmission network cost

• Disadvantage: bandwidth cost

CoreMetroLast mile

PoC3


35pt


partners :

18pt


partners :

Content






35pt


partners :

18pt


partners :

IP/Ethernet Backhaul Solution

Benefits: Enough transport bandwidth for S1/X2 interface

Cost-effective

Meet flexibility and convergence requirements

Key technologies

Transport security: MPLS VPN, VLAN

QoS guarantee: MPLS TE, MPLS DiffServ, IP DiffServ

Synchronization: Synchronous Ethernet, IEEE1588v2, BITS, GPS or Huawei clock over IP

Transport access layer: FE/GE cable, cable (VDSL), Packet MW, P2P fiber and GPON.

Scenario:

For operator which has built or plans to deploy IP/Ethernet network.

S-GW/MME

GE

GE

FE/GE (fiber)

S-GW/MME

eNode B

eNode BGPS

FE

BITS

IP/Ethernet (MPLS,

VPLS, VLAN)

FE/GE (cable)


35pt


partners :

18pt


partners :

MSTP-based Backhaul Solution

FE/GEMSTP transmission

network

FE/GE

GE

FE/GE

S-GW/ MMEeNode B

eNode B

eNode B

Rt VC-trunk: bearer high

QoS traffic

Nrt VC-trunk: bearer low

QoS traffic

2M line: used for

clock sync.


Co-working with MSTP network

Easy expansion

The bandwidth multiplexing in MSTP ring can improve the transmission efficiency up to more than 30%

Key Technologies

Transport security: VLAN

QoS guarantee: separated trunk for real time (rt) and non-real time (Nrt) applications

Synchronization: 2Mbps line for clock synchronization such as synchronous Ethernet, IEEE1588v2, Huawei clock over IP, GPS

or BITS.

Transport access layer: FE/GE cable, cable (VDSL), Packet MW, P2P fiber, and GPON.

Scenario:

For operator which has MSTP network or plan to upgrade from SDH to MSTP


35pt


partners :

18pt


partners :

PTN-based Backhaul Solution

FE/GE PTN network

FE/GE

GE

FE/GE

S-GW/ MMEeNode B

eNode B

eNode B


Co-working with traditional network

Easy expansion

The bandwidth multiplexing in PTN ring can improve the transmission efficiency up to more than 30%

Key Technologies

Transport security: VLAN

QoS guarantee: separated tunnel for real time (rt) and non-real time (Nrt) applications

Synchronization: 2Mbps line for clock synchronization such as synchronous Ethernet, IEEE1588v2, Huawei clock over IP, GPS

or BITS.

Transport access layer: FE/GE cable, cable (VDSL), Packet MW, P2P fiber, and GPON.

Scenario:

For operator which has PTN network or plan to upgrade from SDH ( or SONET) to PTN


35pt


partners :

18pt


partners :

TDM-based Backhaul Solution

TDM Transport

Network

S-GW/MME

TDM

equipmentTDM

equipment

ML-PPP: Multi-link Point-to-Point Protocol ~ Channelized Packet over SDH ~ STM: Synchronous Transport Module

eNode B

IP/Eth Network

GE

IP

ML-PPPnE1/T1

IP

ML-PPPnE1/T1or cPoS STM-1 (optional)

Benefits: Reuse of legacy transmission network

The use of IP over TDM will improve TDM resource utilization

Suit to low traffic network

Key technologies

Transport security: VLAN, MPLS L2VPN, MPLS L3VPN

QoS guarantee: MPLS TE, MPLS DiffServ, IP DiffServ, VLAN CoS

Synchronization: the clock data can be derived from legacy TDM network or through synchronous Ethernet, IEEE1588v2, Huawei

clock over IP, GPS or BITS on the IP/Ethernet network.

Transport access layer : nxE1/T1.

Scenario:

For operator which has TDM or leased E1/T1 legacy network and plan to upgrade to IP/Ethernet broadband solution


35pt


partners :

18pt


partners :

Flexible E2E LTE Backhaul Networking

Microwave-based backhaul

Satellite-based Backhaul

S-GW/MME

Ethernet

Aggregation/Core

Transport Network

MSTP Network

MSTP-based backhaulIP/Ethernet backhaul

GE/FEIP/Ethernet Network

Metro

FE

nxE1/T1

nxE1/T1

Adaptive to all kind of backhaul scenarios

eNode B

TDM network

eNode B

eNode B

GE/FE

S-GW/MME

Metro

Metro

MetroeNode B eNode B

IDUIDU Ethernet

TDM MW or

Packet MW

FE/GE

eNode B

TDM-based backhaul solution


35pt


partners :

18pt


partners :

Application Scenarios

DSLA

M MME/S-GW

/PDN GW

GE

ADSL2+/SHDSL/VDSL2

modem

Mini DSLAM

FE

ONU

Splitter

eNodeB

GE

eNodeB

eNodeB

IDUIDUGE

eNodeB

IDU

IDU

eNodeB

eNodeB

Microwave

G-PON

P2P fiber/G-PON

E1/T1 over microwave or cable

TDM network

transport network

Suburban/rural • P2P fiber

• GPON

Urban area• Microwave

• P2P fiber/GPON/VDSL2 (if already available)


35pt


partners :

18pt


partners :

ID: xxxxxx 00xxxxxx

E-Mail: [email protected]

Dept.: XXX

Contact person

To Learn More …

Doc. Name Release link

ID: xxxxxx 00xxxxxx


Dept.: XXX

Go-to-MKT strategy

Sales guide

Others

Flash & Video

Special Release

Others

White paper

One-page

Case study

Promotion

Strategy

Branding

ID: xxxxxx 00xxxxxx


Dept.: XXX


35pt


partners :

18pt


partners :

资料使用评价反馈页Quality Assessment

很好（Very Good）

待改进（Not Good ）

好（Good ）

一般（General ）

您对该资料的评价是：

注意：将资料传递给客户时请删除该页胶片！Please delete this page when

you submit to our customers.

请点击此处反馈您对本资料的意见，您的反馈是资料不断改进的指南针！Please click the following link to feedback your comments on this documents,

helping us to improve the materials quality. Thank you in advance!

mailto:[email protected]

mailto:[email protected];[email protected]?subject=%3cFuture%20Proof%20LTE%20Transmission%20Solution%20for%20MBB%3e%20is%20a%20VeryGood%20Material%20


mailto:[email protected];[email protected]?subject=%3cFuture%20Proof%20LTE%20Transmission%20Solution%20for%20MBB%3e%20is%20a%20Bad%20Material%20


mailto:[email protected];[email protected]?subject=%3cFuture%20Proof%20LTE%20Transmission%20Solution%20for%20MBB%3e%20is%20a%20Good%20Material%20


mailto:[email protected];[email protected]?subject=%3cFuture%20Proof%20LTE%20Transmission%20Solution%20for%20MBB%3e%20is%20a%20General%20Material%20

Thank youwww.huawei.com

Copyright©2008 Huawei Technologies Co., Ltd. All Rights Reserved. The information contained in this document is for reference purpose only, and is subject to

change or withdrawal according to specific customer requirements and conditions.

huawei transport solution

Documents

pt font

transmission network

x2 x2c

s1 interface x2

s1 interface data

core network

x2 control plan x2c

s1 control plane s1c