WSEAS Transactions on Communications
Print ISSN: 1109-2742, E-ISSN: 2224-2864
Volume 14, 2015
Intelligent Network Selection for Vertical Handover Optimization in LTE-Advanced
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Abstract: Vertical handover decision (VHD) is a complex strategy in heterogeneous wireless networks because of its significance on network application and performance. The mechanism adopted for the vertical handover utilizes the “break – before – make” phenomenon. However, issue of network availability and the choice of the best available network may be an illusion as the mechanism is subjected to many difficulties in handover decisions, which results in packet drop, high latency and poor network performance. This paper presents an intelligent network selection during vertical handover capable of resolving VHO problems of bandwidth delay (BD) or mismatch and premature timeout by introducing improved TCP proxy in two sub-layers in the radio link layer. The proposed sub-layer interworking network selection mechanism (SLIM) adopts integrated coupling architecture at layer 2 of the eNodeB and UE to provide a smooth handover between 3GPP and WLAN networks. The results obtained demonstrate it adaptability/robustness to various handovers and shows a significant drop in latency during the user equipment (UE) mobility. An improvement in the handover performance with respect to network reliability was eventually achieved when making choice in selecting the optimal network.
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Pages: 170-179
WSEAS Transactions on Communications, ISSN / E-ISSN: 1109-2742 / 2224-2864, Volume 14, 2015, Art. #22