On the reduction of interference effect using power control for device-to-device communication underlying cellular communication network

M. Susanto, H. Fitriawan, A. Abadi, Herlinawati
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引用次数: 8

Abstract

Device-to-Device (D2D) communication has currently been emerging as a promising technology to increase capacity and to extend coverage area in cellular communication network. D2D communication allows direct communication between two or more devices such as mobile user equipments without any base station help as a relay. However, enabling D2D features in cellular communication network will reveal more complex interference problems, because D2D communication could share the same frequency resources as its underlain cellular communication network. This paper analyzes the interference problems in such D2D communications underlying cellular communication network for downlink transmission. This paper explores the use of power control methods to reduce the effect of interference. The decision whether to increase or to decrease the power level on base station (evolved Node B/eNB in Fourth Generation/4G Cellular Networks) or on the transmitter of D2D pair (Transmitter of D2D User Equipment/TUE) is based on the estimated current Signal to Interference plus Noise Ratio (SINR). First method of power control (PC-1) uses a fixed value to control the power level of the transmitter. Another one (PC-2) uses moving average of interference power values. The simulation was carried out to evaluate those two power control methods and its results in term of Cumulative Distribution Function (CDF) of SINR are compared to the system without power control method. The simulation results show that both power control methods contribute the improvement of performances; for one cellular equipment (CUE) and 100 pairs of D2D it achieved the improvement of SINR distribution at 5% with PC-1 and at 4% with PC-2 compared to the system without powr control, meanwhile for 1 D2D pair and 100 CUEs the CDF of SINR at 0 dB achieves 40%, 3%, and 0% for the systems without power control, with PC-1, and PC-2 methods, accordingly.
利用功率控制降低蜂窝通信网络中设备间通信的干扰效应
设备到设备(D2D)通信是目前蜂窝通信网络中一种很有前途的增加容量和扩大覆盖范围的技术。D2D通信允许在两个或多个设备(如移动用户设备)之间直接通信,而无需任何基站作为中继的帮助。然而,在蜂窝通信网络中启用D2D功能将暴露出更复杂的干扰问题,因为D2D通信可能与其底层蜂窝通信网络共享相同的频率资源。本文分析了基于蜂窝通信网络下行传输的D2D通信中的干扰问题。本文探讨了采用功率控制的方法来降低干扰的影响。在基站(在第四代/4G蜂窝网络中演变为节点B/eNB)或D2D对的发射机(D2D用户设备发射机/TUE)上增加或减少功率水平的决定是基于估计的当前信噪比(SINR)。第一种功率控制方法(PC-1)使用一个固定值来控制发射机的功率水平。另一个(PC-2)使用干扰功率值的移动平均。通过仿真对两种功率控制方法进行了评价,并将其SINR的累积分布函数(CDF)结果与不采用功率控制方法的系统进行了比较。仿真结果表明,两种功率控制方法均有助于提高系统性能;对于1台蜂窝设备(CUE)和100对D2D,与不加功率控制的系统相比,使用PC-1和PC-2的SINR分布分别改善了5%和4%,同时对于1对D2D和100对CUE,不加功率控制的系统,使用PC-1和PC-2的SINR CDF分别达到了40%、3%和0%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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