Improving Cooperative Transmission Feasibility by Network Reconfiguration in Limited Backhaul Networks

Article

Abstract

For coordinated multi-point (CoMP), sets of base stations (BSs) have to be selected to jointly serve user equipments (UEs). These sets are typically selected based on wireless characteristics only. However, using CoMP also poses strict capacity and latency requirements on the backhaul network. Hence, these requirements additionally need to be taken into account when selecting BSs for CoMP. We have developed a mixed integer linear program and a BSs selection heuristic for CoMP that takes into account both aspects: the wireless channels and the backhaul network status. This heuristic can also identify which bottlenecks in the backhaul network make a desired BSs selection infeasible. We exploit this to dynamically reconfigure the backhaul network to the wireless requirements. Our simulations show that the heuristic’s solution quality is close to the optimum while execution time and memory consumption are reduced by multiple orders of magnitude compared to solving the problem via mathematical optimization. In addition, we simulate the network reconfiguration in different backhaul network scenarios. The results illustrate how our approach helps to better exploit available backhaul resources.

Keywords

Coordinated multi-point transmission Backhaul Network reconfiguration Wavelength division multiplexing Optimization Heuristic 

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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Martin Dräxler
    • 1
  • Thorsten Biermann
    • 1
  • Holger Karl
    • 1
  1. 1.Universität PaderbornPaderbornGermany

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