IIIT Hyderabad Publications
Towards 1000x Capacity Challenge via Resource Allocation and Interference Management
Author: Konjeti Viswanadh
Report no: IIIT/TH/2016/13
The data rates have seen a phenomenal increase from 2G with 9.6 kbps per time slot to LTE-Advanced with 1Gbps. It is more than a thousand fold increase. Even this huge data rate is not going to cater the needs of present day era of smart phones and tablets. Wireless Internet has exploded to 100 petabytes of data transfer per day. This clearly suggests that the capacity of the wireless networks has to be increased many fold, failing which will cause an internet slow down. Heterogeneous networks (HetNets) are an attractive means of expanding mobile network capacity. A heterogeneous network (HetNets) is typically composed of multiple radio access technologies, architectures, transmission solutions, and base stations of varying transmission power. Combining such a variety of technologies together enables the best option to be chosen for a given area, but it also presents problems in terms of ubiquity and operation with such a variation of technologies and approaches. Nevertheless, mobile operators are looking to adopt the heterogeneous cellular network, HetNets approach to enable them to meet their goals for coverage and capacity as much greater demands are placed on mobile networks In this thesis, the main objective is to increase the capacity of the wireless networks by enhancing the performance of HetNets from three different directions: Resource Allocation, Interference Mitigation and employing the latest techniques such as beam forming. Channel is the most important resource in wireless networks more so in the case of HetNets as it contains the combination of many different wireless technologies. Although Channel Allocation is a widely studied problem in literature, there is still a scope of improvement when it comes to the latest HetNets technology. In this work, Predictive modeling technique such as regression model is used for effective utilization of the channels by the means of proper allocation. Interference Mitigation in HetNets is a very complicated problem because of the heterogeneous nature. Femtocells. Pico cells, Wifi, Macrocells, all these different technologies have to coexist in one area which creates huge interference challenges to each other. In this work, we proposed intelligent power adaptive strategy and beam control strategies to mitigate the interference in highly dense femto cell deployment scenario.
Full thesis: pdf
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