enabling customized services in emerging 4g networks (it is services time, customized services time)...
TRANSCRIPT
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
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
4G Cellular Network Deployment
Gateways
Content Servers
Base stations
Mobile Devices
Weather Social n/w
Maps
Cellular Network Operator
3
WiMAX Network Deployment
ASN-GatewayCSN-Gateway
Content Servers
Base stations
Mobile Devices
Weather Social n/w
Maps
WiMAX Network Operator
4
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
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
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
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
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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