Optimized Multi-Antenna Broadcasting for Heterogeneous Delay-Constrained Traffic

This paper studies the information-theoretic limits for the fading multiple-input single-output broadcast channel (MISO-BC) for support of data traffic with heterogeneous transmission delay requirements. First, this paper derives the optimal dynamic resource allocation algorithm for simultaneous transmission of both delay-tolerant "packet" data and delay-sensitive "circuit" data by applying a two-layer Lagrange-duality method. Secondly, this paper investigates the fundamental throughput-delay tradeoff for the fading MISO-BC by characterizing the network throughput loss under minimal versus completely relaxed transmission delay constraint, termed the delay penalty, associated with dynamic resource allocation.