Delay and rate constrained transmission policies over wireless channels

We study delay and rate constrained transmission of bursty traffic over wireless channels. We characterize the minimum power requirements via bounds for both single user and multiuser downlink problems, using a class of randomized first-come first-served policies. We show that a larger tolerable delay leads to power reduction, even for single-user Gaussian channels; a source coding interpretation is offered for the result. Further, we show that traffic with maximum-delay constraints requires more power than the same traffic with average-delay constraints