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www.huawei.com
Challenges and Solutions for Wireless Backhaul
Bob CubbageManager, Metro [email protected]
HUAWEI TECHNOLOGIES CO., LTD.Page 2
LTE Backhaul Challenges
Traffic Cost
RevenueVoice
Dominant
Regional andNationwide Coverage
Business Model
End-to-End ManagementService Applications
HUAWEI TECHNOLOGIES CO., LTD.Page 3
Traffic Cost
RevenueVoice
Dominant
2G/3G to 4G
4G Challenges
• 4G OPEX soaring due to:- Increase in backhaul Traffic- Increase in number of eNBs,
femto Cells are required• To maintain profitability, cost
has to properly track revenueTargetCost
2 – 10 Mbps 20 – 100 Mbpsx 10
HUAWEI TECHNOLOGIES CO., LTD.Page 4
BTS/eNB
Fiber
BTS/eNB
BSC/SGW
Wireless
CopperBTS/eNB
Wireless Backhaul Technology Options
BSC/SGW
BSC/SGW
HUAWEI TECHNOLOGIES CO., LTD.Page 5
GPON
xDSL
Microwave
2G/3G/4G
DSLAM
Ethernet
2G/3G/4G
Enterprise
T1/E1
2G/3G
T1/E1 Copper1.5 ~ 20Mbps
Copper Bonding4Mbps ~ 40Mbps
Ethernet Fiber 100 ~ 1000Mbps
xPON Fiber 100 ~ 1000Mbps
Multi-Media Access• Copper• Microwave• Fiber
Flexible Solutions Solve 4G Backhaul Challenges
Multi-media access addresses reach & scalability issues
IP Microwave ~ 800Mbps
HUAWEI TECHNOLOGIES CO., LTD.Page 6
PacketTransport
• Microwave- IP microwave with
adaptive modulation maximizes bandwidth
- Compact co-site design saves space and cost
• Ethernet over fiber- Cost-effective backhaul
• GPON over fiber- Extend fixed broadband
network• xDSL over copper
- Offload lower priority traffic at lower cost per bit
GPONGPON
xDSLxDSL
EthernetEthernetCell Site
MicrowaveMicrowave
Resident Enterprise
RNC
FiberFiber
CopperCopper
RadioRadio
Any Media Access Provides TCO Reduction
HUAWEI TECHNOLOGIES CO., LTD.Page 7
QoS Guaranteed InternetISP
eNode B
xDSL/DOCSIS SR (Service Router)
Policy Service
RNC (Radio Network Controller)
Offload
Considerable Transport Savings via Low-priority Offload
Low QoS
Low-Priority Offload Reduces Transport Cost
• Most bandwidth intensive applications do not require strict SLAs
• Existing transport can be used to provide strict SLAs
• Offload provides cost-effective transport for low-priority services
Source: Allot GMBT Report 2009Q2
Small percentages of services require stringent SLAs
NxT1/E1
HUAWEI TECHNOLOGIES CO., LTD.Page 8
last mile middle mile
RNC/AGW
last mile middle mile
RNC/AGW
last mile middle mile
RNC/AGW
Switch point
Switch point
S1 S1
LTE Network Architecture Considerations
HUAWEI TECHNOLOGIES CO., LTD.Page 9
1 to 3 us
1 to 3 us3usNANA
Timing Accuracy
0.05ppmLTE - TDDWiMax - TDD
0.05ppmLTE – FDD with SFN/MBMS or D-ICIC
0.05ppmCDMA20000.05ppmWCDMA0.05ppmGSM
Frequency AccuracySystem
FDD: Frequency Division Duplex TDD: Time Division DuplexSFN: Single Frequency NetworkMBMS: Multicast Broadcast Multimedia ServiceD-ICIC: Dynamic Inter-Cell Interference Coordination
Synchronization Requirements
HUAWEI TECHNOLOGIES CO., LTD.Page 10
GE/10GE RNC
PRS (Primary Reference Source)BTS T1
FENodeB
BTS T1
FENodeB
Time Stamp
Time Stamp
~
IEEE 1588v2 and Sync Ethernet provides network synchronization
1 127 253 379 505 631 757 883 1009 1135
+0.05+0.05
--0.050.05
ppmppm
High Quality Synchronization Transport
Freq offset within +/- 0.05 ppm
HUAWEI TECHNOLOGIES CO., LTD.Page 11
• China Mobile• Test results for 32 nodes• Test results below G.823 MTIE
mask and meets sync spec
IEEE1588v2 MTIE Sync Test Results
HUAWEI TECHNOLOGIES CO., LTD.Page 12
ETH-DM
Remote loopbackETH-LM
Fault locationRemote LoopbackETH-AIS, ETH-RDI
Fault verificationRemote failure indication ETH-LT
Fault notificationLink monitoringETH-LB
Fault detectionLink connectivity checkETH-CC
IEEE 802.1agIEEE 802.3ahITU-T Y.1731
IEEE 802.1ag/ITU Y.1731
Service Layer OAM – UNI to UNI Ethernet Layer
ITU Y.1731 Connectivity Layer OAM Line link layer
IEEE 802.3ah Access Link OAM Access Link OAM Customer-side link layer
Customer Equipment
UNI UNI
Edge Edge
GE GE
Customer Equipment
Transport Network
End-to-End Ethernet OAM Capability
SDH-like OAM Performance
HUAWEI TECHNOLOGIES CO., LTD.Page 13
4G
3G
T1/E1
FE
4G 3G
T1/E1FE
GE
MSC (Mobile Switching Center)
T1/OC-N
• Multi-Media Access: xDSL, xPON, Copper, Microwave, Fiber• Support for 2G, 3G & 4G transmission
• High Quality Sync Distribution: IEEE 1588v2, Sync Ethernet
PRS
~
• E2E Service Management
• Multi-Point Microwave
• Linear, Ring, and Mesh Protection
2/3G
T1/E1
FE
4G
BSC
RNCGE/10GE
Wireless Backhaul Summary
HUAWEI TECHNOLOGIES CO., LTD.Page 14 Page 14
Copyright©2010 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.
www.huawei.com