A Randomized Cooperative Routing Framework for Wireless Ad hoc Networks

Speaker: PhD Student Muharrem Sarper Göktürk, Sabanci Universitesi

Abstract: Cooperative communications is one of the promising techniques to enhance the performance of wireless networks. Cooperation has been shown to be an appropriate transmission paradigm in particular for energy-constrained wireless networks. Implementation of cooperative diversity architecture in wireless networks requires cross-layer protocols that exploit recent physical layer findings to improve the system performance while minimizing the protocol overhead.

Cooperative diversity obtained from virtual antenna arrays facilitates dynamic and adaptive routing schemes that improve the end-to-end system performance in ad-hoc networks. Cooperative schemes that employ randomized distributed space- time codes (RDSTC) can help forming virtual multiple-input- single-output (v-MISO) links on the fly, avoiding explicit relay selection and actuation mechanisms. In this talk, we present a cooperative routing framework that employs RDSTC. In the proposed framework, packets are forwarded through opportunistically formed v-MISO links without the need for establishing a prior route based on single-input-single-output (SISO) links. Our framework alleviates link failures by assuring packets’ progress through a region instead of a specific end-to-end topology based node set. The proposed schemes reduce the total number of hops and the total number of nodes interfered, leading to significantly improved spatial reuse and throughput performance.

Biography:

M. Sarper Gokturk received his BS degree in Electrical and Electronics Engineering from the Middle East Technical University, Ankara, Turkey, in 2004. He received his MS degree in Electrical/Telecommunications Engineering from Drexel University, PA, USA, in 2006. He is currently pursuing his PhD under supervision of Prof. Ozgur Gurbuz, in Electronics Engineering at Sabanci University, Istanbul, Turkey. Between April-October 2010, he was a visiting researcher, working with Prof. Elza Erkip, at the Integrated Information Systems Laboratory of Polytechnic Institute of New York University, NY, USA. M. Sarper Gokturk’s research interests are in the field of wireless networks, in particular, media access control (MAC), cross layer design and cooperative communication architectures with emphasis on the applications for wireless sensor networks.

December 08, 2010, at 13:40, FENS L027.