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Robust Methods for LTE and WiMAX Dimensioning

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Executive Summary

This paper proposes an analytic model for dimensioning OFDMA based networks like WiMAX and LTE systems. In such a system, users require a number of sub-channels which depends on their SNR, hence of their position and the shadowing they experience. The system is overloaded when the number of required sub-channels is greater than the number of available sub-channels. The authors give an exact though not closed expression of the loss probability and then give an algorithmic method to derive the number of sub-channels which guarantees a loss probability less than a given threshold. They show that Gaussian approximation lead to optimistic values and are thus unusable.

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