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Optimization Methods for Minimum Power Multicasting in Wireless Networks with Sectored

Summary: Optimization Methods for Minimum Power
Multicasting in Wireless Networks with Sectored
Arindam K. Das, Robert J. Marks, Mohamed El-Sharkawi, Payman Arabshahi, Andrew Gray
Abstract--We consider the problem of minimum power multi-
casting in wireless networks with sectored antennas. For omnidi-
rectional wireless broadcast to a node, a transmission from node
i to node j will also reach all nodes which are closer to i than j.
Depending on the network geometry, this strategy can be highly
power efficient. In ideal sectored antenna systems, however, this
phenomenon is sector specific; i.e., only those nodes which are
located in the same sector as j will receive the transmission im-
plicitly. Though this might seem an apparent disadvantage, the
higher gains associated with directional antennas (as opposed to
omni-directional antennas) allow for reduced transmission powers
without sacrificing the signal-to-interference ratio at the receiver.
In this paper, we first develop a mixed integer linear programming
model for optimal solution of the minimum power multicast prob-
lem with sectored antennas. Subsequently, we discuss a biologi-
cally inspired algorithm for solving the problem to near-optimality


Source: Arabshahi, Payman - Applied Physics Laboratory & Department of Electrical Engineering, University of Washington at Seattle


Collections: Engineering