  Wireless devices need to adapt their transmission power according to the
fluctuating wireless channel in order to meet constraints of delay sensitive
applications. In this paper, we consider delay sensitivity in the form of
strict packet deadlines arriving in a transmission queue. Packets missing the
deadline while in the queue are dropped from the system. We aim at minimizing
the packet drop rate under average power constraints. We utilize tools from
Lyapunov optimization to find an approximate solution by selecting power
allocation. We evaluate the performance of the proposed algorithm and show that
it achieves the same performance in terms of packet drop rate with that of the
Earliest Deadline First (EDF) when the available power is sufficient. However,
our algorithm outperforms EDF regarding the trade-off between packet drop rate
and average power consumption.
