Consistent rate provisioning is one of the most prominent features envisioned for 5G, as a pivotal condition for improved user experience, especially for services like video streaming, online gaming, etc. Prior research has shown that providing a consistent rate, while beneficial for mobile users, can result in severe underutilization of resources, leading to inefficient operation of cellular networks. One of the ways of increasing allocation efficiency is by reallocating the unused resources to the same users. In this paper, we quantify the benefits of different reallocation policies. We then determine the optimal policies for different optimization objectives. First, we focus on increasing the efficiency of network operators and then on providing proportional and max-min fairness. The analysis captures the correlation of the user's channel quality in contiguous frames by using Markov chains. The outcomes of the analysis hold both for users that are always active and for users whose activity is intermittent. We also analyze the case with two classes of consistent users: premium and regular. The analysis is validated by synthetic and trace-driven simulations. We also compare the performance with that of a benchmark and show that the corresponding optimal reallocation policy improves the performance by at least 35%.
All Science Journal Classification (ASJC) codes
- Computer Networks and Communications
- Electrical and Electronic Engineering