A Discussion on Macrocell-Femtocell LTE Network Handover Decision Algorithm
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Umar Danjuma Maiwada, Computer-Science, Faculty of Computer-Science & Engineering, Jodhpur National University, Jodhpur, India.
This is the study of Macrocell - Femtocell LTE (Long Term Evolution) Network Handover Decision Algorithm. The surest way to increase the system capacity of a wireless link is by getting the transmitter and receiver closer to each other, which creates the dual benefits of higher quality links and more spatial reuse. Femtocells drop off the macrocell load and, therefore, macrocells can devote their resources exclusively to outdoor and mobile communications. However, the deployment of femtocells may introduce extra interference to macrocell base stations. An effective interference management mechanism is required to optimize the system performance. One of the enabling technologies for Long Term Evolution (LTE) deployments is the femtocell technology. By having femtocells deployed indoors and closer to the user, high data rate services can be provided efficiently. Hence, the decision to trigger a handover is a crucial component in the design process of handover, since the success and the efficiency, to a large extent, depends on the accuracy and timeliness of the decision. The design of an efficient and successful handover requires a careful selection of parameters and the optimal setting. The LTE standard supports two parameters to trigger the handover and select the target cell: hysteresis margin and Time-to-Trigger (TTT). Mini macrocell base stations also referred to as femtocells improve the quality of service of indoor and outdoor users. Mobility management remains a key issue with regards to their deployment. In handover management, making a handover decision in the LTE macrocell femtocell network is a crucial research area.
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