On Coverage Probabilities and Sum-Rate of Full-Duplex Device-to-Device Cellular Networks
On Coverage Probabilities and Sum-Rate of Full-Duplex Device-to-Device Cellular Networks
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DOI：
10.1109/icc.2018.8422590
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发表时间：
2018-05
期刊：
影响因子：
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通讯作者：
Hung V. Vu;N. Tran;T. Le-Ngoc
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作者：
Hung V. Vu;N. Tran;T. Le-Ngoc
本文利用随机几何工具推导了一个实际的全双工（FD）蜂窝D2D网络的蜂窝和D2D链路的覆盖概率的封闭近似。在考虑的模型中，D2D用户在现实残馀自干扰的不利影响下以FD模式操作，其位置采用同质空间毒点过程（PPP）建模。由于发射功率、无线衰落和链路距离分布的平均值，覆盖概率涉及多个积分。因此，我们的解决方案是首先应用拉普拉斯变换和新颖的近似，精确地近似随机变量的分数函数和指数函数的期望值，以获得基站（BS）和D2D用户的信噪比（SINRs）分布。通过进一步取蜂窝和D2D链路距离分布的平均值，我们得到了蜂窝和D2D覆盖概率的封闭近似。此外，基于D2D链路覆盖概率的近似，得到了D2D链路和率的解析表达式，该表达式可以有效地进行计算。我们的研究结果表明，在D2D中集成FD比半双工D2D提供了显着的和速率改进。
This paper utilizes the tools of stochastic geometry to derive closed-form approximations of coverage probabilities for both cellular and D2D links of a realistic underlaid full-duplex (FD) cellular D2D network. In the considered model, D2D users operate in FD mode under the adverse effect of realistic residual self-interference, and their locations are modeled by a homogeneous spatial Poison point process (PPP). The coverage probabilities involve multiple integrals due to the average over the distributions of transmit power, wireless fading, and link distances. Therefore, our solution is to first apply Laplace transforms and novel approximations that accurately approximate the expected values of fractional and exponential functions of random variables to obtain the distributions of signal to interference and noise ratios (SINRs) at the base station (BS) and D2D users. By further taking the average over the distributions of cellular and D2D link distances, we then arrive at the closed-form approximations of cellular and D2D coverage probabilities. Furthermore, based on the approximation of D2D link coverage probability, an analytical expression of the D2D link sum-rate is obtained, which can be effectively calculated. Our results show that the integration of FD in D2D provides significant sum-rate improvement over the half-duplex D2D counterpart.