An Extensive Study on the Performance Evaluation and Scheduling of HeNBs

Abstract

Since the dawn of mobile communication systems, reducing the cell size has been one option to increase the signal-to-interference-plus-noise ratio (SINR) in both links. The impact of this reduction can be perfectly understood by considering Shannon's law. This work studies in detail the performance of Home eNBs (HeNBs), nodes with a smaller coverage area. After a detailed theoretical study of the SINR, a simulation approach is used to extract performance results in small cell indoor scenarios. Results corresponding to the goodput, delay and packet loss ratio are analyzed. Based on an improved version of LTE-Sim, the proportional fair, frame level scheduler (FLS) and exponential rule are tested in an indoor environment. With the saturation conditions taken into consideration, the FLS performs better than the other schedulers. This work shows that with the considered applications, it is possible to achieve a reduction in the transmitter power of HeNBs without compromising the small cell network performance.

Service Quality of the Urban Microcellular Scenario in the Sub-6 GHz Frequency Bands

“…Usually, QoS metrics may be based on four key quantitative parameters: packet loss ratio (PLR), throughput (or goodput), packet delay and jitter [32]. Indirectly, these QoS metrics may be mapped into quality of experience [33].…”

“…In this study, differently from [39], where only a modeling approach was followed, the small cell performance is evaluated through system level simulations by first applying an improved version of LTE-Sim [40]. LTE-Sim is an opensource framework that simulates LTE-Advanced networks, which was improved earlier to produce the results presented in [33], [41]. Then, in an effort to replicate the results for 5G, the expected differences of the presented study considering LTE-Sim in relation to those using the 5G New Radio (5G NR) simulator (the 5G-air-simulator), from the University of Bari, are identified [42].…”

Cost Revenue Trade-off for the 5G NR Small Cell Network in the Sub-6 GHz Operating Band

“…The PF scheduler is used as a typical way to find a trade-off between requirements of fairness and spectral efficiency. It is effective in reducing variations in user bit rates with little average bit rate degradation, as long as user average values of SINR are fairly uniform [20]. The simulation parameters are presented in Tab.…”

Characterization of Indoor Small Cells Propagation

“…It is assumed that the node in the room only serves users in that room at any point with coordinate (x, y), whose boundary is delimited by the walls of room 1, served by the node in the coordinate (0, 0). The SINR is calculated through an approach similar to the one described in [11], [12], as follows: SINR(P T x , x, y) = P (P T x , 0, 0)…”

“…EESM is a channel-dependent formulation that is represented by an equation which maps the power level and MCS to the values generated by each SINR in the domain [14]. To simulate the EESM on the room of interest, an upgraded version of the LTE-Sim was used [11], [15]. A transmitter power of 20 dBm was considered together with receiver and transmitter gains of 0 dBi.…”