Sampath Rangarajan (with Ravi Kokku, Rajesh Mahindra, Honghai Zhang)
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Transcript of Sampath Rangarajan (with Ravi Kokku, Rajesh Mahindra, Honghai Zhang)
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Enabling Customized Services in Emerging 4G Networks
(It is services time, customized services time)
Sampath Rangarajan(with Ravi Kokku, Rajesh Mahindra, Honghai Zhang)
www.nec-labs.com
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Evolution of Mobile Voice/Data Tech.
Peak data rate
Avera
ge T
hro
ug
hput
IS-136
GSM
IS-95A
HSPA+,LTE
GPRS
EDGE
IS-95B
1X EV-DO
UMTS
1X EV-DV
1X
802.16d
802.16e
4G family of technologies
LTE-Advanced
UMB
802.16m
Enhanced IMT2000
IMT-Advanced
IMT2000
ITU (International Telecommunications Union) classification
3.5G
3G
3GPP2
3GPP
X
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4G Cellular Network Deployment
Gateways
Content Servers
Base stations
Mobile Devices
Weather Social n/w
Maps
Cellular Network Operator
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WiMAX Network Deployment
ASN-GatewayCSN-Gateway
Content Servers
Base stations
Mobile Devices
Weather Social n/w
Maps
WiMAX Network Operator
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Virtualized Cellular Network Deployment
Content ServersMobile Devices
Weather Social n/w
Maps
Cellular Access
Network
Cellular Operator 2
Cellular Operator 1
Cellular Operator 3
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Physical network sliced into multiple virtual networks: Each virtual operator gets an impression
that they own (an isolated part of) the network
Virtual Networks
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Maps Weather Social n/wVoIP/Video
Userdevices
Service Provider
Network Operator
Use case 1: Mobile Virtual Network Operators, Corporate bundles
Groups of users are provided with isolated
resources
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Maps Weather Social n/wVoIP/Video
Userdevices
Service Provider
Network Operator
Use case 2: Service Providers with Resource Reservations
Service providers with isolated resources
New business models
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Maps Weather Social n/w
Userdevices
Service Provider
Network Operator
VoIP/Video
Use case 3: End-to-end Isolation
Complete isolation for
Evaluation of new algorithms (GENI)Corporate intranetsMNOs provisioning limited services
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NVS: Network Virtualization Substrate
Three key requirements– Isolation across slices– Customizability
• Slices can deploy their own resource management algorithms for their flows
– Efficient base-station resource utilization (important to MNO)
Design considerations– Level of isolation
• Flow(s), subchannel, time, hardware• Tradeoff: isolation vs. utilization
– Provisioning• Bandwidth or resource-based
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Base station
Slice 1
Slice 2
Slice 3
Util
ity (Q
oS)
Resource (cost)64
-QAM
QPSK
Fixed bandwidth allocation
Fixed resource allocation
GOAL: Ability to run multiple virtual slices with isolated wireless resources on the same physical base-station
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NVS Design
KEY IDEA: Decouple Flow scheduling from Slice scheduling problem
1. Customizable Flow Management Framework
– QoS Management defined or selected by slices
• Custom schedulers• Facilitates innovation and
differentiation
2. Optimal Slice Scheduler– Addresses both bandwidth and
resource based slice provisioning• E.g. 3 Mbps Min/Max• E.g 10% of radio resources
Slice Manager(MNO)
Slice Owner
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NVS-Plugin Design
Frame Scheduler
NVS Slice Scheduler
Downlink Schedule
r
Classifier
SL
ICE
#1
CELLULAR BASESTATIONQoS Scheduler
NVS Plug-inNVS Plug-in
Downlink Schedule
r
Classifier
SL
ICE
#2
Synchronizer
Flo
w-l
evel
Fee
dba
ck
Utilization
GatewayGateway
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Implementation of NVS outside the base-station
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NVS-Plugin Deployment Architecture
GatewayGateway
NVS Plug-In
Vendor-1 BS
Virgin Mobile AT&T Mobile TV
Mobile Network Operator
Boost Metro PCS ESPN Mobile
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Vendor-2 BS Vendor-3 BS
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Implementation and Evaluation
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ClientsASN
CSNBasestation
AntennaAttenuator
Access to the MAC software, esp. scheduling
Picochip WiMAX Platform
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Classifier
BASE STATIONBASE STATION
Low Priority TCP (e.g. Bittorrent)
Regular TCP(e.g. HTTP FLV)
UDP (e.g. RTSP)
Slice SchedulerSlice Scheduler
Frame/User Discard
MESA
Slices with bandwidth reservations: Can be added, and classifier Updated dynamically
Periodic wireless channel feedback
Low Priority TCP (Bittorrent)
Backpressure
Other
Classifier
MESA (Video Flow Optimizer)
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Conclusion
NVS: Network virtualization substrate– For virtualizing a cellular basestation– Equally applicable to several cellular technologies
Allows innovation and customization at slice level Papers to be presented at MobiCom 2010 and
MobiArch 2010 Demo video at
– http://www.nec-labs.com/~ravik/RESEARCH/NVS/
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