Proactive load balancing with admission control for heterogeneous overlay networks

Abstract

The next generation wireless networks will be the coexistence of heterogeneous wireless technologies. Balancing the traffic load among different networks can effectively utilize the overall radio resources in the system. In this paper, we propose an efficient load balancing scheme for the heterogeneous overlay systems, which is applied in the call admission control process. If the available network(s) cannot provide enough resource for the request call without degrading the quality‐of‐service (QoS) obtained by the ongoing calls, the system will perform load balancing operations first by initiating vertical handoffs among networks in order to create more rooms for the request call. The load balancing algorithm is to minimize the variance between the network utilizations of the entire system, which can be formulated as a quadratic binary programming problem. Simulation results show that the proposed scheme can admit more calls into the system compared with the other three reference schemes and then improve the overall throughput. Meanwhile, the scheme can keep the networks working in effective states and provide a better QoS support for users. Copyright © 2011 John Wiley & Sons, Ltd.

Leveraging mobility and content caching for proactive load balancing in heterogeneous cellular networks

“…To that end, we review existing proactive techniques. Ma and Ma proposed a new proactive load balancing mechanism to initiate vertical handovers prior to admitting call if network resources are not substantial. Proactivity of this work concerns user‐cell association policy only and lacks consideration of users' mobility and content demands.…”

Network selection and resource allocation for multicast in HetNets

“…We have also proposed solutions of proactive vertical handoff between WiMAX and WLAN networks to improve the quality of service for users (Ma and Ma, 2009;Ma and Ma, 2012). In addition, we have introduced a resource management scheme in (Ma and Ma, 2013) to dynamically balance the network traffic load from the network operators' point of view. However, most of existing works for the interworking of heterogeneous networks are designed for the unicast service.…”

Bandwidth efficient multicast in HetNets

“…The second scheme is similar to the WLAN-first [13] unicasting schemes, where the stations always connect to the available network with the Minimum Bandwidth Cost (MBC). The third reference scheme works based on a general idea of load balancing schemes (e.g., [14]) which accepts an incoming station into the network leading to the Minimum increase on the Overall system Bandwidth Cost (MOBC). In the simulation, the networks at the same tier are configured with the same bandwidth cost for one unit resource (i.e., c n ); and then, c n can also be written as c 1 , c 2 and c 3 corresponding to each tier.…”