Resource Allocation With Minimum Outage Probability in Multicarrier Multicast Systems

Abstract

Several innovative applications are emerging that require significant multimedia data transmissions, which unfortunately, current communication systems struggle to provide. In this paper, we examine the high outage tendencies of conventional multimedia multicasting (CVM) due to the bottleneck imposed by the user with minimum signal-to-noise ratio (SNR) and we present a technique based on the statistical approximations of the amortized weighted averaging (AWG) of users' SNR. For completeness, we propose a suboptimal multicast resource allocation algorithm using memoization with stochastic rounding. We compare the system performance of AWG scheme with the CVM scheme in multicarrier wireless network using our newly derived system outage probability and average throughput as performance metrics. Numerical results not only show that the performance gap of our suboptimal algorithm is reasonably within 10% from the optimal solution, but also show that the AWG scheme admits more users and is more energy efficient than the CVM especially when low power is available to the system.

Keywords

• Multicasting
• outage probability
• weighting factor
• memoization
• stochastic rounding
• multimedia broadcast multicast systems (MBMS)