Deployment of Ultra-dense Small Cells on Cellular Networks
Date Issued
2015
Date
2015
Author(s)
Wang, Chih-Sheng
Abstract
To support the rapid growth of mobile data traffic, deploying ultra-dense small cells is regarded as a promising solution for 5G operators to improve network coverage and capacity with low cost. The network coverage and capacity of a small cell are respectively affected by its pilot power and traffic power, and the summation of the two power quantities is bounded by the total transmit power which depends on the power supply of the small cell. Thus, how to deal with the tradeoff between the pilot and the traffic power allocation is one of the important and challenging issues for ultra-dense small cell deployment. This paper studies the network coverage and capacity joint optimization problem for ultra-dense small cell deployment in 5G cellular systems. We formulate the target problem as a multi-objective optimization problem and propose a distributed optimal algorithm by Lagrangian method to tackle the problem. We conduct a series of simulations to evaluate the performance of the proposed algorithm, and the simulation results confirm that our proposed algorithm can significantly improve the network coverage and capacity, compared with the baseline approach.
Subjects
Ultra-dense Small cells
Coverage optimization
Capacity optimization
Multi-objective
convex optimization
Type
thesis
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