A Weight-Based Resource Scheduling Algorithm for Uplink LTE-A Femtocell Network

  • PDF / 1,371,737 Bytes
  • 17 Pages / 439.37 x 666.142 pts Page_size
  • 43 Downloads / 129 Views

DOWNLOAD

REPORT


A Weight‑Based Resource Scheduling Algorithm for Uplink LTE‑A Femtocell Network Abdullah Omar Arafat1   · Mark A. Gregory1

© Springer Science+Business Media, LLC, part of Springer Nature 2020

Abstract SC-FDMA is the most suitable option for the LTE-A uplink. Contiguity plagiarism characteristics are required for optimum channel scheduling in an SC-FDMA system. The right scheduling in the uplink will maximise the user experience and network efficiency. Channel scheduling requires a proper formation of the matrix as an input. The structure of the matrix should be intelligent enough to consider the allocated bandwidth and number of serving users within the range of the active serving cell. In this paper, a weight based resource scheduling (WBRS) algorithm has proposed to improve the network performance in the LTE-A uplink femtocell network. Simulation results show that the WBRS performs better for uplink and eliminates the gap of the current channel scheduling algorithms for the LTE-A femtocell. Keywords  Femtocell · PAPR · SC-FDMA · Resource allocation · Channel scheduling

1 Introduction In LTE-A, uplink channel allocation is mandated by the contiguity paradigm, which requires computational complexity and intricacy. With the massive deployment of small cells, e.g. a femtocell in recent days, user experience in the uplink is as vital as in the downlink. Peak-to-Average-Power-Ratio (PAPR) is the critical factor in the SC-FDMA network that allows low power consumption and contiguous resource allocation [1–4]. The high peak-to-average ratio is the main obstacle that causes non-linearity at the receiving end of the transmission. PAPR increases complexity in the channel allocation and power transmission in the uplink [5, 6]. Therefore, an uplink channel scheduling scheme should be considered with a trade-off between low computation complexity and system performance. As a solution to this, SC-FDMA has been chosen as the uplink access scheme of the LTE-A network [7]. In SC-FDMA, a contiguous RB is required to take advantage of the PARP [8]. A proper uplink channel scheduling algorithm for uplink operation can reduce the PAPR in transmission. In such a process, LTE-A uses a channel sounding process that allows the * Abdullah Omar Arafat [email protected] 1



RMIT University, Melbourne, Australia

13

Vol.:(0123456789)



A. O. Arafat, M. A. Gregory

eNodeB to monitor the channel condition for all users over the allocated bandwidth. By extracting the channel condition information (CCI) from the users, the eNodeB manages the matrix for each user for each resource block (RB). This matrix is called a channel gain matrix that is updated every 1 ms by the CCI that is sent periodically by the users [9, 10]. Channel scheduling algorithms are performed based on this channel state condition matrix. The buffering limitation and power limitation in the uplink direction cause constriction of the uplink scheduling. Resource allocation restriction has existed since the single-carrier modulation method was introduced in uplink sche