Resource Allocation for Network MIMO Systems with HARQ and Partial Channel Knowledge
In this paper, the authors consider a cellular system, where multiple Base Stations (BSs) cooperate to decode signals coming from Mobile Terminals (MTs), using a hybrid automatic repeat request error protection mechanism. They focus on the problem of weighted network sum rate maximization, by addressing the following three resource allocation problems: the scheduling of MT transmissions, the scheduling of cooperating BSs for each MT, and the allocation of resources on the backhaul network. Both a star and ring architecture for the backhaul network is considered. They propose two approaches, where resource allocation on the backhaul is performed either before or after reception of the packet on the wireless link, with an either partial (statistical) or full knowledge of instantaneous channels.