X-Ethernet Ethernet...
Transcript of X-Ethernet Ethernet...
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X-EthernetEthernet Everywhere
Network Technology Lab of 2012 Labs
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A Unified Ethernet Network – Ethernet Everywhere
Ethernet
DCService Latency jitter
CPRI <100us +-8.138ns
Inter-site CoMP 250us --
Smart Grid <5ms (<500km) +-10us
Industry4.0 ns ~ ms Low jitter
Low latency S1 < 1ms --
E ECPE
E
E
E
Enterprise
E
Broadband
RouterE ERouterE
E
Router
Fronthaul / Backhaul
Metro Network
E BBUERouter
E
E
All Ethernet
Standard, perfect interoperability
Mature ecosystem, lost cost
But difficult to support some new Apps
Ultra-Low Latency Requirement
New emerging service
Different level of latency requirement
Beyond packet latency / jitter capability
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FlexEthernet Use Cases
MACFlexESHIM
PHY
Scenario1: Sub rate
MACFlexESHIM
PHY
MAC
Scenario2:Channelized
MACFlexESHIM
PHY
PHY
Scenario3: Bonding
Scenario2: Channelized Ethernet is used for slicing.Each port has 20 channels at maximum.Minimum channel band is 1/20 port band.
•••
Length 20n Master Calendar
PHY A slot 19
PHY A slot 0
PHY B slot 19
PHY B slot 0
PHY C slot 19
PHY C slot 0
PHY D slot 19
PHY D slot 0
Programmability
Isolation
Flexibility
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FlexEthernet Implementation
64/66B
Encode
64/66B
Encode
64/66B
Encode
64/66B
EncodePCS Upper
FlexE Shim
PCS Lower
PMA / PMD
a
Client-a Client-b Client-x Client-y
PHY 1 PHY 2 PHY n
b b x …… a …… ……
1 2 3 4 20 1 2 20 1 20 Slot Num
Scramble Scramble Scramble
100G 100G 100G
……
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What is X-Ethernet
X-Ethernet is a technology set we are engaged in;
Main purpose of X-Ethernet is resolving deterministic ultra-low latency challenge;
Extremely Deterministic Latency
Expanded Applications
Extremely Simple Maintenance
Network Hard Slicing
Extremely High Speed/Density
Extremely Low Latency
NG DCN physical layer traffic isolation
High Level Modulation + FEC
On-line AR/VR
AI
X-haul (Front haul + Back haul)
Ethernet-compatible operation knowledge
Simplified Strong OAM
Auto Discovery, Auto Configuration
Loss Less (no buffer reason Loss)
Deterministic Performance
PCS layer switching
Hybrid Multiplexing
hard pipe
statistic multiplexing
Flexible Multi-Rate
Channelized, Pipelined,
Fast Hitless Resizing/Reconfiguration
X-EEthernet
EverywhereForwarding Based On Bit Block
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X-Ethernet Forwarding
Forwarding in lower layer can have lower latency
X-Ethernet make use of Ethernet PCS layer code block forwarding
Less L
ate
ncy
Be
tter D
ete
rmin
istic
Effe
ct
Framing
FEC
Store-ForwardLine CodingSwitching
Address LookupPacket Forwarding
Routing
TCP WindowingFlow Control
Packet Retransmission
ApplicationPresentation
Session
Bits
Frames
Packets
Segments
Data
1
2
3
4
765
Physical
Data Link
Network
Transport
Session
Presentation
Application
PMD
Medium
L1
L2
L3
L4
L5
L6
L7
PMA
PCS
RS
MAC
IP / MPLS L3
MediumL0
Eth
ern
et
L2
X-Ethernet
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X-Ethernet E2E Hard Pipe
PHY
PHY
Media
L2 / L3
X-E Node
PCS
PHY
PCSX-E
Relay
Media
X-ENode
X-ENode
EndStation
EndStation
PHY
X-E Node
PCS
PHY
PCSX-E
Relay
Media
L2 / L3 forwarding L2 / L3 forwarding
End Station End Station
PHY
L2 / L3
X-Ethernet can provide E2E hard pipes using PCS layer forwarding
100G
Link
100G
Link
Pipe
Pipe
Pipe
Pipe
Why low latency
• No store-and-forward, no buffering
• No MAC/IP table lookup
• No scheduling / queuing, no congestion, no packet loss and retransmission
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X-Ethernet Hybrid Multiplexing
X-E Hybrid Multiplexing supports sharing unused bandwidth of X-E hard
pipes with background traffic to raise network utilization;
Network
Node
Foreground Traffic
Hard Pipe 1
Network
Node
Foreground Traffic
Hard Pipe 2
Background
Traffic
Foreground Traffic
Hard Pipe 1
Foreground Traffic
Hard Pipe 2
Background
Traffic
Traditional Hard Pipe (no sharing)
X-Ethernet
Node
Foreground Traffic
Hard Pipe 1
X-Ethernet
Node
Foreground Traffic
Hard Pipe 2
Background
Traffic
Foreground Traffic
Hard Pipe 1
Foreground Traffic
Hard Pipe 2
Background
Traffic
X-Ethernet’s Hard Pipe (Hybrid Multiplexing)
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PCS
Multiple Forwarding Modes
Physical
PCS Up
X-E / FlexE
PCS Low
PCS
MAC
IP / MPLS
Medium
Physical
MAC
IP / MPLS
Medium
Routing
SwitchingMAC / MPLS / IP
Forwarding
PCS Layer Forwarding
PCS Code Block / L2 / L3 forwarding capability Multiple forwarding modes in parallel in a
single device or even single link
PCS Up
X-E / FlexE
PCS Low
X-Ethernet Forwarding
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Multiple Modes for Various Services
2G/3G/4G/5G
Internet
Macro cellsmall cell
RRU BBU Pool
Multiple forwarding modes for various type of services respectively
An Integrated network for multiple types of service
X-E
X-E
X-E
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X-Ethernet Use Cases
Network based AR/VR with 20ms Motion to Photons Latency/Round Trip
Time; Latency Budget for Network is limited as 1~5ms
HFT: High Frequency Trading, Time is
Money, Latency means profit loss
DC DC
DC DC
DC DCDCN,DCI
StdE
Low
LatencyHigh
Density
Easy Use,
Simple
Maintenance
Long
Reach
Efficient
Hybrid
Multiplexing
Flexible
Multi Rate
Unified Eth
Based Network
Application
Expanded
FlexE
X-E
Cloud Service,
Computation, CDN
Internet of Things
Financial VR
AR
Low end to end latency, High Throughput Future Mobile Fronthaul and Backhaul
Low Latency and High Capacity/Density
Low latency, Timing sensitive Low Latency, Vast Connectivity,
Industrial Networking
4.0
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Use Case 1 – Ethernet Leased Line
X-E
Branch
Branch
Headquarter
X-E X-E
Company
Office
Internet
DC B
DC A
E2E hard pipe – fine granularity – 1G, N*1G, which is an enhancement to FlexE spec
Security – physical layer traffic isolation
QoS – Guaranteed bandwidth; very low latency; no packet loss
Dynamic bandwidth adjustment
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UseCase 2:Xhaul - Converged Fronthaul/Backhaul
NE5G
RRU
4.5GRRU
LTERRU
3G/LTEeNodeB
EPC
X-Haul Network for integrated fronthaul and backhaul
CPRI
CPRI
NGFI/eCPRIDC1
vBBUPool
S1DC2
vBBUPool
E-X2
• Fronthaul(CPRI) : 100us(20km)/200us(40km);
• Backhaul :10us~1ms;
• Provide deterministic ultra-low latency closed to the physical limitation for wider Fronthaul scale;
• One Device,One interface,One Fiber for both Fronthauland Backhaul traffic;
• Fronthaul/Backhaul On Demand;
• Hitless Bandwidth Adjustment
• High bandwidth utilization by creative hybrid multiplexing;
• Achieve deterministic ultra-latency forwarding layer, based on Ethernet PHY Core;
• Leverage Ethernet mature ecosystem;
NE
NE
NE
NE
NE
NE
NE
NE
X-E Inside
X-E Inside
X-E Inside
X-E Inside
X-E Inside
X-E Inside X-E Inside
X-E Inside
One network, one technology for both Fronthaul and Backhaul
Integrated Fronthaul / Backhaul – XHAUL (http://www.5g-xhaul-
project.eu/index.html)
X-Ethernet Prototype
Copyright©2014 Huawei Technologies Co., Ltd. All Rights Reserved.
The information in this document may contain predictive statements including, without limitation, statements regarding the future financial and operating
results, future product portfolio, new technology, etc. There are a number of factors that could cause actual results and developments to differ materially
from those expressed or implied in the predictive statements. Therefore, such information is provided for reference purpose only and constitutes neither an
offer nor an acceptance. Huawei may change the information at any time without notice.
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FlexE Architecture
Reference: http://www.oiforum.com/wp-content/uploads/OIF-FLEXE-01.0.pdf
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FlexE CalendarReference: http://www.oiforum.com/wp-content/uploads/OIF-FLEXE-01.0.pdf
Reference: http://www.oiforum.com/wp-content/uploads/OIF-FLEXE-01.0.pdf
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FlexE OverheadReference: http://www.oiforum.com/wp-content/uploads/OIF-FLEXE-01.0.pdf
Reference: http://www.oiforum.com/wp-content/uploads/OIF-FLEXE-01.0.pdf
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Ethernet Evolution
X-Ethernet will be the evolution direction of Ethernet
10M,100M,1000M
10GE,40GE,100GE
2.5GE,5GE,25GE,50GE
200GE,400GE,…
OIF FlexE 10/40GE,
nx25GE,mx5GE…
…
Flexible Multi-rate interface
Standard Ethernet
InterfaceStandard Fix Rate
Phase 1
Flex Ethernet
InterfaceFlexible Multi Rate
Phase 2 Deterministic EXtremely low latency: ~100ns
EXpanded service : XHAUL,HPC, SAN,
Industrial Internet
EXtremely Simple Maintenance
EXtremely High Speed/Density
FleXible rate pipe
Phase 3
X-Ethernet
NetworkEthernet Everywhere
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5G xHAUL vs Crosshaul
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Use Case 2 – Xhaul – Integrated Fronthaul/Backhaul
Internet
Edge DC Mobile Core
Mobile Backhaul Slice
EPCIP / MPLS
BackhaulIP / MPLS
Backhaul
Mobile Fronthaul + Backhaul Slice
BBUX-E
Fronthaul EPCIP / MPLS
Backhaul
X-E
X-E
X-E
X-E
X-E
X-E
X-E X-E
X-E
X-E
X-E
Fronthaul, Backhaul, IoT, Broadband, VPN, etc.
One network, one technology for both Fronthaul and Backhaul
Integrated Fronthaul / Backhaul – XHAUL (http://www.5g-xhaul-project.eu/index.html)
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Progress of X-Ethernet Prototype
Use FPGA to prove two key features:
150/200ns single node Latency, 1ns jitter per 3 nodes
CPRI transparently transmission
Two 10G ports support CPRI Option7 and Native 10GE. Six 100G ports support X-Ethernet and Native 100GE
CPRI Option7
X-E No.1 X-E No.2 X-E No.3
100GE
CPRI Tester
Network Performance Tester
X-E
(CPRI Option7)
X-E
(100GE)