Transmission capacity of two-way communication in wireless ad hoc networks

Authors:
Kien T. Truong;Steven Weber;Robert W. Heath, Jr.
Affiliations:
Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX;Department of Electrical and Computer Engineering, Drexel University, Philadelphia, PA;Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX
Venue:
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Year:
2009

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Abstract

Wireless ad hoc networks require bidirectional data transmission to support two-way traffic and control functions like packet acknowledgement. Most prior work on the capacity of wireless ad hoc networks, however, has focused only on one-way communication. In this paper we develop the concept of transmission capacity of two-way communication in wireless ad hoc networks. The transmission capacity has been used extensively to analyze one-way ad hoc networks - in this paper we provide a generalization that incorporates the concept of a two-way outage. We derive an upper bound and an approximation for the two-way transmission capacity, which are shown to be relatively tight for small outage probability constraints. We also quantify how the two-way success requirement reduces network capacity. Our numerical and simulation results show that for certain two-way networks the capacity loss is considerable.