Performance Evaluation and Packet Scheduling in HeNB Deployments

Abstract

The unsupervised and chaotic deployment of Home eNBs (HeNBs) is leading to high levels of interference. To understand the behaviour of the interference of these uncoordinated deployments is vital to reach significant capacity improvement and also to explore opportunities to save energy. This paper considers high and middle interference level scenarios, with a maximum of four users per cell. HeNBs indoor deployed is considered within building. We theoretically analyse the traffic performance of this scenario through the study of the Signalto-Interference-plus-Noise-Ratio (SINR). Through the use of the LTE-Sim simulator one obtains the quality indicators for two flows that are being utilised by the users. Video and best effort are studied, while varying the transmitter power and the areas of the apartments. The achieved SINR is higher (around 10 dBm) when the area of the cells is smaller. The variation of the transmitter power of the HeNBs does not present any significant impact. Noticeable throughout the simulations is observed that is possible to operate the system without setting the transmitter power of HeNBs to the maximum value at both interference levels. Simulation results also show that with the considered flows is possible to serve the maximum number of four users per HeNB with high quality. This statement is confirmed by the maximum achieved Packet Loss Ratio for video with a value of value of 1.6 %, which is lower than the maximum of 2 % indicated by the 3GPP. Taking into account the obtained results it is possible to promote a reduction in energy consumption of the HeNBs without penalizing the service quality.

An Extensive Study on the Performance Evaluation and Scheduling of HeNBs

“…In terms of apartment dimensions, in [28], only an apartment side length of 10 m is considered. In this work, the side length of the apartments (identified as Side in the figures) varies from 5 m to 20 m in steps of 5 m. The maximum number of users per HeNB considered in [28] is four, but the results from [27], [33] show that the maximum system capacity in the considered scenarios was not achieved. This result allowed for exploring the existence of more users per HeNB.…”

“…Different simulation approaches for the deployment of HeNBs followed by the research community [11], [23]- [27] consider the assumptions and parameters of [28].…”

“…These independent and noncorrelated variations increase the complexity of the theoretical study and provide a broader vision for the average signal-to-interference-plus-noise ratio (SINR) and its impact on system performance. In addition to the theoretical study, the goal is to evaluate the performance through simulation by considering LTE-Sim [32] with the extension of the works presented in [27], [33]. LTE-Sim is an open-source framework used to simulate LTE-Advanced Adapted from [36].…”