Graduate School and Research Center in Digital Sciences

Hierarchical optimization of user association and flexible TDD allocation for access and backhaul networks

Sapountzis, Nikolaos; Spyropoulos, Thrasyvoulos; Nikaein, Navid; Salim, Umer

Submitted to IEEE Transactions on Mobile Computing, June 2017

The success of future heterogeneous networks (HetNets) heavily depends on the interplay between user association and resource allocation on both the access and backhaul network. While user association is key to improve both the user and network performance, it is becoming a multi-objective optimization problem that should consider the number and type of base station in range. Furthermore, the increasing spatiotemporal heterogeneity in downlink(DL) and uplink(UL) traffic suggests that DL/UL resources can be tuned to optimally serve the respective workload. Split DL/UL association and flexible TDD offer such an opportunity. While much literature exists on these problems, the majority consider them separately. In this work, we develop a framework that tackles the optimal interplay of (i) user-association, (ii) radio resource allocation, and (iii) backhaul resource allocation of TDD resources, for a family of objective functions. We propose an algorithm that reduces the complexity of this problem by decomposing it into three optimization subproblems, each potentially solved by a different network element and at different timescales. We prove convergence to the global optimum, and provide simulation results that demonstrate the performance benefits of our approach.

Document Bibtex

Title:Hierarchical optimization of user association and flexible TDD allocation for access and backhaul networks
Department:Communication systems
Eurecom ref:5232
Copyright: © 2017 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Bibtex: @article{EURECOM+5232, year = {2017}, month = {06}, title = {{H}ierarchical optimization of user association and flexible {TDD} allocation for access and backhaul networks}, author = {{S}apountzis, {N}ikolaos and {S}pyropoulos, {T}hrasyvoulos and {N}ikaein, {N}avid and {S}alim, {U}mer}, journal = {{S}ubmitted to {IEEE} {T}ransactions on {M}obile {C}omputing, {J}une 2017}, url = {} }
See also: