Load-balancing metrics: Comparison for infrastructure-based wireless networks

  • Authors:
  • Yean-Fu Wen;Jui-Chang Shen

  • Affiliations:
  • -;-

  • Venue:
  • Computers and Electrical Engineering
  • Year:
  • 2014

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Abstract

The transmission ranges and bandwidths differ in heterogeneous wireless networks deployed from one- or two-dimensional to three-dimensional infrastructure-based architectures. Each mobile device (MD) selects a served access point (AP) or base-station (BS) according to their requirements and, subsequently, an MD selects the served AP, or the AP sends re-association messages to related MDs. This causes load-balancing problems because the balancing metrics of the MD quantity, AP-served traffic, and bandwidth usages are unsuitable to satisfy the fairness and quality of service (QoS) requirements. The packet delay was used as a measure of the criteria required to satisfy these requirements. To compare these metrics, a three-dimensional architecture load balance (TALB) algorithm is proposed that is based on the concepts of cell breathing and association control. Varying traffic requirements, the number of MDs, and AP bandwidths are considered. The simulation results show that the delay metric enhances the balance and outperforms other metrics.