A Multidepth Load-Balance Scheme for Clusters of Congested Cells in Ultradense Cellular Networks

Table 1

Comparison between the related works and the proposed method.

Work	Scenario	Method	Multidepth offloading	Features
[16]	Homo.	An offline and an online algorithm		A fractional frequency reuse mechanism
[17]	Homo.	Considering intra- and intercell handover		A fractional frequency reuse mechanism
[18]	Homo.	Considering channel and power allocation		Unlicensed and licensed bands
[19]	Hetero.	Considering asymmetric information		A controller is unaware of the offloading performance of small cells
[20]	Hetero.	Considering fairness		Wi-Fi access points to reduce traffic loads of macrocells
[9]	Homo.	Considering RB utilization ratio, cells’ loads, and signal qualities		Multicell networks
Proposed	Homo.	Considering load balance of neighboring cells	✓	Clusters of congested cells in ultradense cellular networks