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Downlink capacity optimization in a heterogeneous home area network with application to smart grid

机译：异构家庭局域网中的下行链路容量优化及其在智能电网中的应用

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This paper studies the optimization problem of total downlink capacity in heterogeneous multiuser Home Area Network (HAN) for Smart Grid application, where beamforming technique is employed at the smart meter. Based on the proposed system model, an optimal downlink power allocation scheme is proposed under the constraints that 1) each user should satisfy individual signal to interference noise ratio (SINR) requirement for successful heterogeneous communication; 2) the sum of transmit power allocated to each user is equal to the permissible total transmit power at the smart meter; 3) allocated transmit power to each user is feasible. By employing the theorem that the sum of independent exponentially distributed random variables follows Erlang distribution, the probability distribution function (PDF) of the smallest allocated transmit power is mathematically obtained from the properties of downlink indoor Saleh-Valenzuela (S-V) channels. Numerical results show that the total downlink capacity is greatly enhanced by the proposed power allocation scheme. Furthermore, numerical results validate the contribution of beamforming technique at the smart meter on capacity optimization.
机译：本文研究了智能电网应用中异构波束形成技术应用于智能电表的异构多用户家庭局域网（HAN）中总下行链路容量的优化问题。基于提出的系统模型，在以下约束条件下，提出了一种最优的下行链路功率分配方案：1）每个用户应满足单独的信噪比（SINR），以实现成功的异构通信; 2）分配给每个用户的发射功率之和等于智能电表允许的总发射功率; 3）分配给每个用户的发射功率是可行的。通过采用独立指数分布的随机变量之和遵循Erlang分布的定理，可以从下行室内Saleh-Valenzuela（S-V）信道的属性数学上获得分配的最小发射功率的概率分布函数（PDF）。数值结果表明，所提出的功率分配方案大大提高了总下行链路容量。此外，数值结果验证了智能电表中波束成形技术对容量优化的贡献。

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