Dynamic resource allocation and interference coordination for millimeter wave communications in dense urban environment

Abstract

Inter cell interference coordination (ICIC) strategies in cellular systems have vital importance for spectrum efficiency in dense urban networks. Frequency reuse and resource allocation approaches are used to overcome the interference and the efficiency problems. Users in the cell edge suffer from low throughput and signal to interference plus noise ratio. Although increasing the transmit power of the BS can be considered as a solution, it also causes ICI. Considering these difficulties, we propose a technique called Experience Based Dynamic Soft Frequency Reuse in the 5G millimeter-wave (mmWave) at 28 GHz band.The first objective of the proposed technique is to minimize the inter cell interference by using Soft Frequency Reuse method. The technique also aims to increase the overall system throughput by using Dynamic Channel Allocation.The third objective is to progress a fairness scheduler algorithm among users by optimizing the base station schedulers, which we call Experience-Based Packet Scheduler. The main purpose of this article is to find the best value for α in order to maximize the average user and cell edge user throughput while considering the users' fairness. Simulations and numerical results show that the proposed algorithm can achieve up to 30% higher performance in terms of the average user throughput rates and has better fairness for lower α values (0.3 and 0.4).

Device-to-Device communication in an uplink channel for a 5G mm-Wave cellular network

“…At a distance of 10 m, the data rate of D2Ds is found to increase from 120 Kbps to 130 Kbps. Equations ( 8) and (11) give the relation between data rate of D2Ds and distance between D2Ds. Thus, it is evident from the above equations that with a slight decrease in pathloss exponent from 2.5 to 2, there is an increase in data rate for varying distance between D2Ds from 10 to 20 m. Figure 3 plots the D2D transmit power versus corresponding SINR for varying pathloss exponents and distance between D2Ds.…”

“…Service providers can currently expand beyond the present 4G channel capacity of 20 MHz using the mm-Wave spectrum. The authors in [11] discussed resource allocation and frequency reuse approaches to overcome interference and efficiency issues, as well as proposed an experience based dynamic soft frequency reuse technique in the 28GHz 5G mm-Wave band. Users at the cell edge experience low throughput and signal-to-interference-plus-noise ratio (SINR).…”