[Aug. 2006 - Present] Research Assistant, Wireless Networking Group, Coordinated Science Laboratory, UIUC. 

[Fall 2008] Teaching Assistant, ECE/CS 438 - Communication Networks. 

[Oct. 2004 - Jun. 2006] Software Engineer, Network Advance Technologies (NAT) Group, Motorola India Electronics Ltd. 

[Jun. 2004 - Oct. 2004] Programmer Analyst Trainee, Offer Framework Systems (OFS) division, Cognizant Technology Solutions Pvt. Ltd.

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RESEARCH

 Academic Research

    Thesis Research

• Net-X - A testbed for multichannel, multi-interface, multi-hop wireless network
  - Work involves protocol and algorithm design, implementation on a Linux 2.4.26-based system, and measurements to demonstrate system performance.
  - Requires kernel programming and designing scripts for executing the experiments. - Working on algorithms and protocols based on spectrum management (width, power, rate, etc.) for performance improvement in multichannel wireless networks.
  - Developed a strategy for providing low-delay routes for delay sensitive applications over multichannel ad-hoc networks.
  - Proposed a channel allocation algorithm for minimizing adjacent channel interference effects.
  - Worked on protocols for provisioning QoS in multichannel wireless networks.
  

• QoS Provisioning in Multichannel Wireless Networks through Spectrum-Width Adaptation
  - Course project for CS 598 - Internetworking with Prof. Matthew Caesar during Fall 2008.
  - Designed algorithms for routing, congestion control, and admission control with the notion of providing quality of service (QoS) in multichannel wireless networks.
  - Simulated the algorithm and demonstrated the performance improvement using AODV routing protocol.
  
  
• Performance Evaluation of Broadcast Mechanism in Wireless Sensor Networks
  - Course project for CS 525 - Advanced Distributed Systems with Prof. Indranil Gupta during Spring 2007.
  - Studied the performance tradeoffs among various percolation-based broadcast mechanisms used in wireless sensor networks such as, flooding, site percolation-based gossiping, and bond percolation-based gossiping.
  - Analyzed and simulated the performance tradeoffs and discussed their relative choices for various sensor network applications such as, code updates, membership management, and query processing.

 Industrial Research (At Motorola)

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PUBLICATIONS

 Journal Papers

1. Vijay Raman and Indranil Gupta, ``Performance Tradeoffs Among Percolation-based Broadcast Protocols in Wireless Sensor Networks'', to appear in The International Journal of Parallel, Emergent, and Distributed Systems.[preprint]

 Conference Papers

1. Vijay Raman and Matthew Caesar, ``A Practical Approach for Providing QoS in Multichannel Ad-Hoc Networks Using Spectrum Width Adaptation'', accepted for publication to the IEEE Globecom, 2009.[preprint]



2. Vijay Raman and Indranil Gupta, ``Performance Tradeoffs Among Percolation-based Broadcast Protocols in Wireless Sensor Networks'', in the proceedings of Workshop on Wireless Ad hoc and Sensor Networks (held in conjunction with ICDCS), 2009.[slides]



3. Suresh Kalyanasundaram, Vinod Ramachandran, and Vijay Raman, ``Signaling Reduction in Idle Mode for Inter-Technology Mobility'', in the proceedings of the IEEE Vehicular Technology Conference, Spring 2007.



4. Matt Dillon, Aniruddha Diwan, Chris Murphy, and Vijay Raman, ``Evaluating the Opportunity for Optimization of Various RF Parameters in IEEE 802.16e Multi-Cell Network '', in the proceeding of the IEEE Vehicular Technology Conference, Fall 2006.



5. Rajeev Agrawal, Suresh Kalyanasundaram, Vinod Ramachandran, and Vijay Raman, ``Enhanced Distance-Based Location Update Mechanism'', published at the 3rd Motorola China Technology Symposium, May 2006.



6. Suresh Kalyanasundaram, Vinod Ramachandran, and Vijay Raman, ``Signaling Reduction in Idle Mode for Inter-Technology Mobility'', published at the 3rd Motorola China Technology Symposium, May 2006.



7. Vijay Raman and Suresh Kalyanasundaram, ``Performance Analysis of the Distance-Based Location Update Mechanism of CDMA 1x EV-DO'', in the proceedings of the IEEE Globecom Conference, December 2005.

 Technical Reports

1. Vijay Raman and Nitin H. Vaidya, ``A Static-Hybrid Approach for Providing Low Delay Routing for Real Time Applications'', Technical Report, August 2009.



2. Vijay Raman and Nitin H. Vaidya, ``Adjacent Channel Interference Reduction in Multichannel Wireless Networks Using Intelligent Channel Allocation'', Technical Report, August 2009. [Older version: March 2009].



3. Vijay Raman and Matthew C. Caesar, ``A Practical Approach for Providing QoS in Multichannel Ad-Hoc Networks using Spectrum Width Adaptation'', Illinois Research and Scholarship Technical Report, April 2009.



4. Vijay Raman and Indranil Gupta, ``Performance Tradeoffs Among Percolation-based Broadcast Protocols in Wireless Sensor Networks'', Dept. of Computer Science Technical Report, April 2009.

 Posters and Demos

1. Vijay Raman and Nitin H. Vaidya, ``Routing VoIP over Multichannel, Multi-Radio Wireless Networks'', poster and demo at Illinois Center for Wireless Systems Summer School, August 2009.[ppt]



2. Vijay Raman and Nitin H. Vaidya, ``Interference Aware Channel Allocation in a Multichannel, Multi-interface Wireless Network'', poster at WiNTECH (held in conjunction with MobiCom), September 2008.



3. Rishi Bhardwaj, Chandrakanth Chereddi, Pradeep Kyasanur, Paul Roycroft, Nistha Tripathi, Vijay Raman, and Nitin H. Vaidya, ``Net-X: A Framework for Supporting Multiple Channels and Multiple Interfaces in a Wireless Network'', poster and demo at ACM MobiCom, September 2007.[poster in ppt]



4. Rishi Bhardwaj, Chandrakanth Chereddi, Pradeep Kyasanur, Paul Roycroft, Nistha Tripathi, Vijay Raman, and Nitin H. Vaidya, ``Net-X: Framework for Multi-channel, Multi-interface Wireless Networks'', poster at Illinois Center for Wireless Systems (ICWS) Symposium, UIUC, September 2007.[poster in ppt, pdf]

 Standards Documents

1. Vijay Raman, Anand Bedekar, Ajoy Singh, and Suresh Kalyanasundaram, ``A Proposal for a Requirement for IP Local Mobility'', IETF NETLMM Working Group internet draft, February 2006 (Expired on August 2006).



2. Vijay Raman, Anand Bedekar, Ajoy Singh, and Suresh Kalyanasundaram, ``A Protocol for Network-based Local Mobility Management'', IETF NETLMM Working Group internet draft, February 2006 (Expired on August 2006).



3. Ajoy Singh, Vivek Gupta, and Vijay Raman, ``CARD Protocol for 802.21 Information Service (IS)'',  IEEE 802.21 Media Independent Handover Services (MIH) project, January 2006.

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