Transmission Capacity of Two-way Communication in Wireless Ad hoc Networks



Kien T. Truong, Steven Weber, and Robert W. Heath, Jr.


Proceedings of IEEE International Conference on Communications (ICC), Dresden, Germany, June 2009.


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 spatial networks - in this paper we provide a generalization that incorporates the concept of a two-way outage. We derive bounds on 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.

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