In this paper we study the performance trade-offs between conventional
cellular and multi-hop ad-hoc wireless networks. We compare through
simulations the performance of the two network models in terms of raw
network capacity, end-to-end throughput, end-to-end delay, power
consumption, per-node fairness (for throughput, delay, and power), and
impact of mobility on the network performance. The simulation results
show that while ad-hoc networks perform better in terms of throughput,
delay, and power, they suffer from unfairness and poor network
performance in the event of mobility.
We discuss the trade-offs involved in the performance of the two network
models, identify the specific reasons behind them, and argue that the
trade-offs preclude the adoption of either network model as a clear
solution for future wireless communication systems. Finally, we present a
simple hybrid wireless network model that has the combined advantages of
cellular and ad-hoc wireless networks but does not suffer from the
disadvantages of either.