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This paper has been submitted to IEEE Journal on Selected Areas in Communication.

Abstract

This paper considers the problem of selecting either routes that consist of long hops or routes that consist of short hops in a network of multiple-antenna nodes, where each transmitting node employs spatial multiplexing. This distance-dependent route selection problem is approached from the viewpoint of energy efficiency, where a route is selected with the objective of minimizing the transmission energy consumed while satisfying a target outage criterion at the final destination. Deterministic line networks and two-dimensional random networks are considered. It is shown that when the number of short hops grows large or when the target success probability approaches one, short-hop routing requires less energy than long-hop routing. It is also shown that long-hop routing requires less energy than short-hop routing when the target success probability approaches zero. In addition, numerical analysis indicates that given loose outage constraints, only a small number of transmit antennas are needed for short-hop routing to have its maximum advantage over long-hop routing, while given stringent outage constraints, the advantage of short-hop over long-hop routing always increases with additional transmit antennas.

Citation

Caleb K. Lo, Sriram Vishwanath, and Robert W. Heath, Jr. . "An Energy-Based Comparison of Long-Hop and Short-Hop Routing in MIMO Networks." (submitted)

BibTeX

@inproceedings{ {{{bitex cite}}},
  author = "Caleb K. Lo and Sriram Vishwanath and Robert W. Heath, Jr.",
  title = { An Energy-Based Comparison of Long-Hop and Short-Hop Routing in MIMO Networks },
  booktitle = { {{{proceedings}}} }
}