Abstract
This paper proposes an efficient handover scheme considering the asymmetric characteristics of macro and pico cells in LTE-A HetNet. The proposed scheme detects a suitable target eNB for handover using a multi-criteria decision making algorithm and the mobility information of user equipment (UE). A prompt handover is triggered for the UE if the received power is too low or the downlink SINR is below a threshold, avoiding radio link failure. The simulation results reveal that the proposed scheme significantly enhances goodput while reducing packet loss and unnecessary handover.
Highlights
Conforming to the forecast from the fields [1], the global mobile data traffic has been exponentially growing in recent years
This is because the handover decision based on only the signal to interference plus noise ratio (SINR) threshold causes frequent handover especially in the Heterogeneous networks (HetNets) environment where the user equipment (UE) of poor signal power can find several neighbor eNBs of high signal power
Work In eNB-rich HetNet environment the signal power of the neighbor eNBs plays an important role in making handover decision
Summary
Conforming to the forecast from the fields [1], the global mobile data traffic has been exponentially growing in recent years. The demands on mobile data are driven by smartphones, tablets, laptops and other portable devices, and the plain cellular networks are insufficient to provide the services with limited radio resources. Heterogeneous networks (HetNets), tightly integrated low-power nodes (LPNs) such as pico-cells and femto-cells inside large-scale macro-cells, can improve the network performance by offloading from large macro-cells of hot-spot coverage. They can provide high quality service at macro-cell edges where the signal coverage significantly degrades. A two-tier macro-pico LTE-A HetNet consists of three main components: evolvedNodeB (eNB), Mobility Management Entity (MME), and Serving Gateway (S-GW)/Packet Data Network Gateway (P-GW). S-GW forwards data from and to eNB to serve user equipment (UE), while P-GW provides UE with the access to exterior network
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