Resource Allocation for Semi-Elastic Applications With Outage Constraints in Cellular Networks
IEEE Transactions on Vehicular Technology
We consider resource allocation for semi-elastic applications, such as mobile video-conferencing, which require a maximum outage. We represent the performance of a session by a sigmoid utility function of the average bit rate over a time window consisting of many slots. The goal is to maximize the total expected utility of all active users. A principal challenge is the difference in time scales: outage is measured over sessions while average bit rate is measured over a time window such as a
... indow such as a group of pictures. We propose that these differences in time scale can be elegantly addressed by shadow prices: a price per unit average rate over each time window and a price per unit outage. We further propose that the price per unit average rate depends on combined pathloss and shadowing, but not on fast fading. We show that resources can be efficiently allocated if the base station chooses prices based on total demand and the users respond by choosing average rates. The performance of our algorithm is illustrated by simulation results. This is the author's version of an article that has been published in this journal. Changes were made to this version by the publisher prior to publication. The final version of record is available at http://dx.3 See e.g.  for the dependence of average inter-cell interference upon the interference power spectral density. Alternatively, one may model timedependent inter-cell interference based on activity in neighboring cells, see e.g. . In a real system, |H k,n,t | 2 σ 2 +I would be replaced by the measured signal to interference plus noise ratio (SINR). This is the author's version of an article that has been published in this journal. Changes were made to this version by the publisher prior to publication. The final version of record is available at http://dx.