2014/05/10 by Hamidreza Boostanimehr, Boostanimehr, Hamidreza, Vijay K. Bhargava +1
Computer Science · Engineering · #Advanced MIMO Systems Optimization #Advanced Wireless Network Optimization #Cooperative Communication and Network Coding #FOS: Computer and information sciences #Information Theory (cs.IT) #Networking and Internet Architecture (cs.NI)
paper · pdf · doi:10.48550/arxiv.1405.2492
openalex publication_date 2014/05/10 · openalex created_date 2025/10/24 · openalex updated_date 2026/07/28
This paper addresses the cell association problem in the downlink of a\nmulti-tier heterogeneous network (HetNet), where base stations (BSs) have\nfinite number of resource blocks (RBs) available to distribute among their\nassociated users. Two problems are defined and treated in this paper: sum\nutility of long term rate maximization with long term rate quality of service\n(QoS) constraints, and global outage probability minimization with outage QoS\nconstraints. The first problem is well-suited for low mobility environments,\nwhile the second problem provides a framework to deal with environments with\nfast fading. The defined optimization problems in this paper are solved in two\nphases: cell association phase followed by the optional RB distribution phase.\nWe show that the cell association phase of both problems have the same\nstructure. Based on this similarity, we propose a unified distributed algorithm\nwith low levels of message passing to for the cell association phase. This\ndistributed algorithm is derived by relaxing the association constraints and\nusing Lagrange dual decomposition method. In the RB distribution phase, the\nremaining RBs after the cell association phase are distributed among the users.\nSimulation results show the superiority of our distributed cell association\nscheme compared to schemes that are based on maximum signal to interference\nplus noise ratio (SINR).\n