Energy-Efficient
Cooperative Routing in Outage-Restricted Multihop Wireless Networks
Behrouz Maham
University of Oslo, Norway
Thursday, September 2, 4pm
Location: BAB024 (Bahen Basement)
Abstract:
Due to the limited
energy supplies of nodes in many applications like wireless sensor networks,
energy efficiency is crucial for extending the lifetime of these networks. In
this talk, we first review our recent research in the context of
resource-constrained cooperative networks. Then, the problem of link cost
formulation is addressed for outage-restricted multihop wireless ad hoc
networks based on cooperative transmission. New cooperative routing protocols
are introduced using the space-time codes for the purpose of energy savings,
given a required outage probability at the destination. Two power control
schemes, i.e., distributed and centralized power allocations are derived to
minimize the total transmission power. Moreover, we consider the multihop
transmission with interference. Efficient techniques are proposed to increase
the spectral efficiency of cooperative multihop transmission. In the first
scheme, incremental relaying, also known as hybrid ARQ, is embedded in the
cooperative routing. In the second approach, we propose cooperative multihop
communication with spatial reuse and an interference cancellation. Compared to
non-cooperative multihop routing, an energy saving of 80% is achievable in
line networks with 3 relays and an outage probability constraint of 10^-3 at
the destination.
Bio:
Behrouz
Maham received the B.Sc. and M.Sc in electrical engineering, from University of
Tehran, in 2005 and 2007, respectively. He worked as a system engineer from 2006
till 2007 at Iran Telecommunication Research Center. From September 2008 to
August 2009 he was with the Dept. of Electrical Engineering at Stanford
University, USA, as a Visiting Researcher. He got his PhD degree from the
University of Oslo, Norway, in April 2010. Currently, he is a Postdoctoral
fellow at the University of Oslo. He has held visiting appointments at
University of Oulu, Finland, and the Alcatel-Lucent Chair at Supelec in France.
His fields of interest span the broad area of scalable wireless communication
and networking, with emphasis on relay techniques, MIMO multiuser techniques,
performance analysis of wireless systems, and space-time coding. He has around
40 publications in major technical journals and conferences and served as a TPC
member for several IEEE conferences.
Host of Talk:
Ben Liang
(liang@comm.utoronto.ca)