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Capacity regions for wireless ad hoc networks

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2 Author(s)
Toumpis, Stavros ; Dept. of Electr. Eng., Stanford Univ., CA, USA ; Goldsmith, A.J.

We define and study capacity regions for wireless ad hoc networks with an arbitrary number of nodes and topology. These regions describe the set of achievable rate combinations between all source-destination pairs in the network under various transmission strategies, such as variable-rate transmission, single-hop or multihop routing, power control, and successive interference cancellation (SIC). Multihop cellular networks and networks with energy constraints are studied as special cases. With slight modifications, the developed formulation can handle node mobility and time-varying flat-fading channels. Numerical results indicate that multihop routing, the ability for concurrent transmissions, and SIC significantly increase the capacity of ad hoc and multihop cellular networks. On the other hand, gains from power control are significant only when variable-rate transmission is not used. Also, time-varying flat-fading and node mobility actually improve the capacity. Finally, multihop routing greatly improves the performance of energy-constraint networks.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:2 ,  Issue: 4 )

Date of Publication:

July 2003

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