Transcript Slide 1

Open Virtualized WiMAX Base
Station Node for GENI WideArea Wireless Deployments
Dipankar Raychaudhuri and Ivan Seskar
WINLAB, Rutgers, The State University of New Jersey
Sampath Rangarajan, Meilong Jiang and Rajesh Mahindra
NEC Laboratories America
Contacts:
{ray,seskar} at winlab dot rutgers dot edu
{sampath,meilong, rajesh} at nec-labs dot com
WINLAB
Project Objectives
Develop an
open/virtualizable WiMAX
base station with external
control and data API’s
Implement GENI-specific
software on an external
Linux-based PC WiMax Base
Station Controller
supporting:
•Virtualization
•slice setup
•Resource management
•L2/L3 programmability
•opt-in
Virtual GENI Router
(at PoP)
GENI Backbone
Network
GENI Access
Network
(Ethernet SW &
Routers)
WiMAX Base
Station (GBSN)
GENI terminals
(WiMAX phone/PDA
running GENI/Linux)
GENI Compliant
WIMAX Base
Station
Controller
Demonstrate the GBSN capabilities in a phased manner, starting with controlled
lab tests of each GENI feature and then migrating to a small-scale outdoor trial
with off-the-shelf WiMAX terminal equipment.
WINLAB
NEC WiMax Base Station
PHY
MAC
Networking
Access mode
SOFDMA/TDD
Frequency
2535 ~ 2605 MHz
DL:UL ratio
35:12, 26:21, 29:18
Channel BW
10 MHz , 8.75 MHz
FFT size
1024, 512
Frame duration
5ms
TX output Power
35dBm (max)
# of sectors
3
Head
compression
PHS
ARQ
HARQ/CC, ARQ
MBS support
Single BS, multiple BSMBS
Resource
management
rtPS
real-time polling service
Power control, mode
control (idle, sleep etc.)
ertPS
enhanced real-time polling
service
IP protocols
IPv4, IPv6
nrtPS
non real-time polling service
Bridging/Routing
Transparent L2 switch,
Bridging
UGS
unsolicited grant service
Packet handling
802.1Q VLAN, PHS**)
BE
best effort
Base Station Features
WINLAB
Supported Service Classes
GENI: Virtualized WiMax Network
Network
WiMax BS
Classifier
IP isolation
Slice II
Slice I
Cell coverage: 0.5~6km
diameter
Throughput 10~75Mbps
2~10 MS per sector/cell
Slice III
OPT
Certified (Virtualized)
802.16e Mobile Stations
R6+
Scheduling
Custom
ASN-GW
Qos
Manageme
nt
NEC
802.16e Base Station
GENI Node (Linux PC)
GENI Open API
Maximum Bit-Rate, Burst-Rate
Minimum Tolerable Sending Bit-Rate
Maximum Tolerable jitter
Minimum Delay
Scheduling Type (e.g., UGS, rtPs ,nrtPs)
Frequency of Operation
Rate / Power requirements
WINLAB
Base Station State
Radio resources (UL and DL)
Time slots (UL and DL)
Downlink burst profile
Uplink burst profile
Frequency
Power
Rate
Legend
BS-IDU: Base Station indoor unit
BS-ODU: Base Station outdoor unit
R6+: Extension of standard ASNGW-BS R6 interface
OPT: Optical Link
Slice QoS
 The WiMax BS MAC supports scheduling
across multiple queues for five service classes.
External PC Controller
 The GENI slice scheduler will map “Rspec”
requirements of slices to the appropriate
queue.
…
Slice
II
Slice
I
Slice
n
GENI Slice Scheduling
 key design issue is isolation between the
GENI scheduler and the MAC scheduler
Open API interface
APIs to receive information about (“get”) and
modify (“set”) MAC /PHY parameters
WINLAB
ertPS
rtPS
(RR, WRR etc.)
802.16e
Base
Station
BE
nrtPS
CID #N
CID #N
UGS
…
 Information about mapping between CID
(connection ID) and IP address/port number
at the CS (convergence sub-layer)
 Information about the QoS class for a CID
(convergence sub-layer)
 Modify priority of the queues at the
scheduler, weights for weighted round-robin
schedule (common packet sub-layer)
 Queue lengths of per CID queue, delay at
the queues, time for successful transmission
(common packet sub-layer)
802.16e Common Packet Sublayer (CPS)
(RR, WRR etc.)
(RR, WRR etc.)
(RR, WRR etc.)
Priority-based Scheduling
WiMAX Frame scheduler
(RR, WRR etc.)
BS DL-MAC
Scheduler
OMF
Testbed(s)
Experiment
Description
Apps
A
Apps
AppsAA
ML
Node Handler
Aggregate Mngr
Node Agent
Node 1
Console
Server(s)
DB
….
Control & Management
Network
Node X
WINLAB
Experimental
Network(s)
OMF Integration



OMF service for
base station/slice
scheduler control
Node Agent for
experiment
orchestration
support
(WiMax) virtual
device in each
sliver
Application
Node
Application
Virtual
Agent
Device
Node
Application
Driver
Virtual
Agent
Node
Device
Virtual
Driver
Agent
Device
Driver
Slice Scheduler
OMF
Service
Base Station
Controller
External PC Controller
WINLAB
R6+
Roadmap: GENI Open WiMAX BS
OMF: ORBIT Management Framework Grid Services Implementation
and Testing
Base Station API
BSR equipment with
open API
API Version 1.0
API validation &
tests
Custom ASN-GW: Implementation and
Testing
NEC Wimax BS Performance
Evaluation
NEC WiMax
BS Delivered
Indoor results
Outdoor results
Pico-chip Wimax BS Lab prototype
Received
PicoChip WiMax BS
START:
Oct ‘08
WINLAB
1 Month
Experience gained
with Picochip prototype
2 Months
3 Months
Year 1
4 Months
5 Months
6 Months