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Project Number


Project Title

CR-GENI - Cognitive Radios for GENI Spiral II

Technical Contacts

PI: Dirk Grunwald Univ. of Colorado, Boulder
Subcontractor: Ivan Seskar WINLAB / Rutgers University Ivan Seskar
Subcontractor: Peter Wolniansky Radio Technology Systems, LLC

Participating Organizations

Univ. of Colorado, Boulder
WINLAB / Rutgers University, North Brunswick, NJ
Radio Technology Systems, LLC

GPO Liaison System Engineer

Harry Mussman


The scope of this project is to develop a set of ruggedized, expandable and configurable multiradio cognitive radio systems that will facilitate experimentation by GENI researchers who have only limited experience with hardware development tools.

Two platform designs will span the range of requirements for cognitive radio systems:

  • stand-alone cognitive radio system, and
  • infrastructure-class cognitive radio system.

These platforms will combine: redesigned frequency-extended radio cards; commodity, one or more off-the-shelf Field Programmable Gate Array systems for digital signal processing; and software based on extensions of an established library that implements “network on chip” functions in FPGAs.

Year 1 of the project will emphasize hardware development of a single FPGA system. The software interface provided during year 1 will be a simple “remote radio” system compatible with the Gnu Software Radio framework. This will enable wide-band sampling but may not be suitable for tightly synchronized real-time projects due to the limited interface. In addition to the simplified interface, a “monolithic” RF design using an existing OFDM radio design will be ported to the system; this design will require more sophisticated design tools (VHDL, Simulink, but will provide functionality across the frequency range of the RF boards.

Year 2 of the project will emphasize an enhanced software platform and integration with the Orbit Management Framework (OMF). The software platform will take the existing OFDM radio design, split the functionality into components and then interconnect those components using a “network on chip” networking topology. This will allow individual components to be replaced, thus allowing different modulation schemes.

Year 3 of the project would involve extending the “network on chip” organization to support multi-FPGA cognitive radio systems, both expanding the number of radio components enabled and the processing capability of the system. Considerable effort in updating the OMF integration will be needed.

These systems will be integrated into the ORBIT Management Framework (OMF) that is part of GENI, and tested in campus testbeds, so that they can be utilized by GENI researchers.

Current Capabilities

(At end of Spiral 1)


MilestoneDate(WiMAX: 1a Delivery of two NEC Release 1 802.16e base stations)? status
MilestoneDate(WiMAX: 1b Validate open API capabilities of the WiMAX base station)? status
MilestoneDate(WiMAX: 1c Import a GENI-compliant control framework from the ORBIT project)? status
MilestoneDate(WiMAX: 1d First release v1.0 of GENI base station node software)? status
MilestoneDate(WiMAX: 1e Demo basic functionality of base station)? status
MilestoneDate(WiMAX: 1f VLAN connections to the GENI backbone network)? status

MilestoneDate(WiMAX: S2.a Outdoor WiMAX available to GENI users)?
MilestoneDate(WiMAX: S2.b Cluster plan for VLANs between testbeds)?
MilestoneDate(WiMAX: S2.c Demo main base station functions)?
MilestoneDate(WiMAX: S2.d Demo VLAN connection to backbone)?
MilestoneDate(WiMAX: S2.e Federate with other cluster testbeds)?
MilestoneDate(WiMAX: S2.f WiMAX client platforms study)?
MilestoneDate(WiMAX: S2.g Integrate latest OMF code)?
MilestoneDate(WiMAX: S2.h Demo experiments with multiple testbeds)?
MilestoneDate(WiMAX: S2.i Testbed available to GENI users)?
MilestoneDate(WiMAX: S2.j Release v2.0 of basestation code for first WIMAX kits)?
MilestoneDate(WiMAX: S2.k GMOC access to WIMAX operating data)?
MilestoneDate(WiMAX: S2.l POC to GENI response team)?
MilestoneDate(WiMAX: S2.m POC to GENI security team)?
MilestoneDate(WiMAX: S2.n Contribution to GENI outreach)?

Project Technical Documents

GENI WiMAX Project: System Engineering Summary
API Specification for Virtualized WiMAX Basestation
D. Raychaudhuri and Editors M. Gerla, “New architectures and disruptive technologies for the future internet: The wireless, mobile and sensor network perspective” Report of NSF Wireless Mobile Planning Group (WMPG) Workshop, August 2005
Open Base Station Architecture Initiative
“Android: An Open Handset Alliance Project"
”NEC’s broadband wireless access products”, NEC Corporation Technical White Paper
“Wireless virtualization in GENI”, GDD-06-17, 2006

  1. Paul, R. Yates, D. Raychaudhuri and J. Kurose, "The Cache-and-Forward Network Architecture for Efficient Mobile Content Delivery Services in the Future Internet", to appear in ITU-T Next Generation Networks (NGN) Conference, Geneva, May 2008.

Quarterly Status Reports

WiMAX: 4Q08 Status Report
WiMAX: 1Q09 Status Report
WiMAX: 2Q09 Status Report
WiMAX: Review on June 28, 2009

Spiral 2 Connectivity

(see ORBIT connectivity section.)

Participating Projects

(Campus WiMAX deployment projects)
WiMAX Design and Prototype
ORBIT Design and Prototype
GENI Projects at WINLAB

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