Maximizing Network Utilization in IEEE 802.21 Assisted Vertical Handover over Wireless Heterogeneous Networks
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초록
In heterogeneous wireless networks supporting multi-access services, selecting the best network from amongthe possible heterogeneous connections and providing seamless service during handover for a higher Qualityof Services (QoSs) is a big challenge. Thus, we need an intelligent vertical handover (VHO) decision usingsuitable network parameters. In the conventional VHOs, various network parameters (i.e., signal strength,bandwidth, dropping probability, monetary cost of service, and power consumption) have been used tomeasure network status and select the preferred network. Because of various parameter features defined ineach wireless/mobile network, the parameter conversion between different networks is required for ahandover decision. Therefore, the handover process is highly complex and the selection of parameters isalways an issue. In this paper, we present how to maximize network utilization as more than one targetnetwork exists during VHO. Also, we show how network parameters can be imbedded into IEEE 802.21-based signaling procedures to provide seamless connectivity during a handover. The network simulationshowed that QoS-effective target network selection could be achieved by choosing the suitable parametersfrom Layers 1 and 2 in each candidate network.
Abstract
In heterogeneous wireless networks supporting multi-access services, selecting the best network from amongthe possible heterogeneous connections and providing seamless service during handover for a higher Qualityof Services (QoSs) is a big challenge. Thus, we need an intelligent vertical handover (VHO) decision usingsuitable network parameters. In the conventional VHOs, various network parameters (i.e., signal strength,bandwidth, dropping probability, monetary cost of service, and power consumption) have been used tomeasure network status and select the preferred network. Because of various parameter features defined ineach wireless/mobile network, the parameter conversion between different networks is required for ahandover decision. Therefore, the handover process is highly complex and the selection of parameters isalways an issue. In this paper, we present how to maximize network utilization as more than one targetnetwork exists during VHO. Also, we show how network parameters can be imbedded into IEEE 802.21-based signaling procedures to provide seamless connectivity during a handover. The network simulationshowed that QoS-effective target network selection could be achieved by choosing the suitable parametersfrom Layers 1 and 2 in each candidate network.
참고문헌 (24)
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