Kim Jeehyeong, Karim Nzabanita Abdoul, Cho Sunghyun
Department of Computer Science and Engineering, Hanyang University, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan, Gyeonggi-do 426-791, Korea.
Sensors (Basel). 2017 May 10;17(5):1088. doi: 10.3390/s17051088.
Device-to-Device (D2D) communication technology has become a key factor in wireless sensor networks to form autonomous communication links among sensor nodes. Many research results for D2D have been presented to resolve different technical issues of D2D. Nevertheless, the previous works have not resolved the shortage of data rate and limited coverage of wireless sensor networks. Due to bandwidth shortages and limited communication coverage, 3rd Generation Partnership Project (3GPP) has introduced a new Device-to-Device (D2D) communication technique underlying cellular networks, which can improve spectral efficiencies by enabling the direct communication of devices in proximity without passing through enhanced-NodeB (eNB). However, to enable D2D communication in a cellular network presents a challenge with regard to radio resource management since D2D links reuse the uplink radio resources of cellular users and it can cause interference to the receiving channels of D2D user equipment (DUE). In this paper, a hybrid mechanism is proposed that uses Fractional Frequency Reuse (FFR) and Almost Blank Sub-frame (ABS) schemes to handle inter-cell interference caused by cellular user equipments (CUEs) to D2D receivers (DUE-Rxs), reusing the same resources at the cell edge area. In our case, DUE-Rxs are considered as victim nodes and CUEs as aggressor nodes, since our primary target is to minimize inter-cell interference in order to increase the signal to interference and noise ratio (SINR) of the target DUE-Rx at the cell edge area. The numerical results show that the interference level of the target D2D receiver (DUE-Rx) decreases significantly compared to the conventional FFR at the cell edge. In addition, the system throughput of the proposed scheme can be increased up to 60% compared to the conventional FFR.
设备到设备（D2D）通信技术已成为无线传感器网络中在传感器节点之间形成自主通信链路的关键因素。已经提出了许多关于D2D的研究成果来解决D2D的不同技术问题。然而，先前的工作尚未解决无线传感器网络数据速率不足和覆盖范围有限的问题。由于带宽短缺和通信覆盖范围有限，第三代合作伙伴计划（3GPP）引入了一种基于蜂窝网络的新设备到设备（D2D）通信技术，该技术可以通过使附近设备直接通信而无需通过增强型节点B（eNB）来提高频谱效率。然而，要在蜂窝网络中实现D2D通信在无线电资源管理方面面临挑战，因为D2D链路复用蜂窝用户的上行链路无线电资源，并且可能对D2D用户设备（DUE）的接收信道造成干扰。本文提出了一种混合机制，该机制使用分数频率复用（FFR）和几乎空白子帧（ABS）方案来处理蜂窝用户设备（CUE）对D2D接收器（DUE-Rx）造成的小区间干扰，在小区边缘区域复用相同的资源。在我们的案例中，DUE-Rx被视为受害节点，CUE被视为干扰节点，因为我们的主要目标是最小化小区间干扰，以提高小区边缘区域目标DUE-Rx的信号干扰噪声比（SINR）。数值结果表明，与小区边缘的传统FFR相比，目标D2D接收器（DUE-Rx）的干扰水平显著降低。此外，与传统FFR相比，所提方案的系统吞吐量可提高高达60%。
