Interference Management Techniques in Small Cells Overlaid Heterogeneous Cellular Networks
Keywords:
Interference, Interference management, Heterogeneous Cellular Network, Small Cells, Cell Less, Closed Subscriber GroupAbstract
Now-a-days because of the rapid increase in mobile users mobile data has also raised. Due to the heavy demand of data rates for advanced applications service providers are forced to adopt different technological advancements in conventional networks. Looking toward this context heterogeneous networks (HetNets) play a vital role in future 5G wireless cellular network deployment. In Heterogeneous Cellular Networks (HCNs) low power small cells are overlaid with the existing macro-only cell which increases the complexity of the network. Some of the emerging network technologies for this cellular evolution are the Femtocell, Picocell and Metrocell networks. Due to the deployment of these small cells in HCNs there are wide varieties of network structures and different transmitting powers which lead to interference in the cellular network. In addition to this, due to the spatiotemporal distribution of the mobile users and their mobility, hotspots also lead to increase of the possibilities of interference generation in wireless cellular network systems. The major technical issues associated with the mass deployment of smaller cells are related to the interference management between smallcells i.e. Femtocells and other serving cells in the same spectrum. Since Femtocells and Macrocells share the same frequency bands, it is necessary to develop efficient interference management techniques to increase the capacity and throughput of HCNs. So in order to meet the user demands in an efficient way without affecting the quality of service (QoS) and throughput of the network, many interference management schemes and power control approaches have been proposed for successful deployment of HCNs. In this paper a review with a brief analysis of some of the efficient interference management techniques along with their challenges is proposed, while keeping the main focus on the hardware interference management techniques. An overview on the coverage and capacity optimization problems in a multi-tier cellular network is also presented.
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