Resource allocation for energy efficiency optimization in uplink–downlink decoupled 5G heterogeneous networks,International Journal of Communication Systems

当前位置： X-MOL 学术 › Int. J. Commun. Syst. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Resource allocation for energy efficiency optimization in uplink–downlink decoupled 5G heterogeneous networks
International Journal of Communication Systems ( IF 1.7 ) Pub Date : 2021-07-13 , DOI: 10.1002/dac.4925
Humayun Zubair Khan ₁ , Mudassar Ali _{1,

2} , Imran Rashid ₁ , Abdul Ghafoor ₁ , Muhammad Naeem ₃ , Adnan Ahmed Khan ₁ , Adil Masood Saddiqui ₁

Affiliation

Heterogeneous networks (HetNets) are a practical solution for traffic offloading from a high powered base station (HBS) to a low powered base station (LBS). In the HetNets, uplink (UL)–downlink (DL) decoupled access (UDDa) strategy is an optimal solution that ensures cell association, independently, in the UL and DL. This strategy offloads HBS cell edge mobile device (MD) to the nearby LBS in the UL. However, energy-efficient cell association for traffic offloading from HBS to LBS, relay, or device to device (D2D) in the UL employing UDDa strategy has not been explored in the past work. We formulate mathematical models which ensure energy-efficient cell association, power allocation, and traffic offloading employing traditional UL-DL coupled access (UDCa) and UDDa strategies in the HetNets. The formulated problems are concave fractional programming (CFP) problems. The CFP is changed to a concave optimization problem using Charnes–Cooper transformation (CCT). The transformed problems are solved using an outer approximation algorithm to obtain $urn:x-wiley:dac:media:dac4925:dac4925-math-0001$ optimal solution. Simulation results show the effectiveness of UDDa strategy over UDCa strategy in terms of MDs association, traffic offloading in the UL and DL, interference mitigation in the UL, data rate, and energy efficiency in the HetNets.

中文翻译：

上下行解耦5G异构网络能效优化的资源分配

异构网络 (HetNet) 是将流量从高功率基站 (HBS) 卸载到低功率基站 (LBS) 的实用解决方案。在 HetNet 中，上行链路 (UL)-下行链路 (DL) 解耦接入 (UDDa) 策略是一种最佳解决方案，可确保在 UL 和 DL 中独立地进行小区关联。该策略将 HBS 小区边缘移动设备 (MD) 卸载到 UL 中的附近 LBS。然而，在使用 UDDa 策略的 UL 中，用于从 HBS 到 LBS、中继或设备到设备 (D2D) 的流量卸载的节能小区关联尚未在过去的工作中进行探索。我们制定了数学模型，以确保在 HetNet 中采用传统的 UL-DL 耦合接入 (UDCa) 和 UDDa 策略实现节能的小区关联、功率分配和流量卸载。公式化的问题是凹分数规划 (CFP) 问题。使用 Charnes-Cooper 变换 (CCT) 将 CFP 更改为凹优化问题。使用外逼近算法求解变换后的问题以获得 $urn:x-wiley:dac:media:dac4925:dac4925-math-0001$ 最优解。仿真结果显示了 UDDa 策略在 MDs 关联、UL 和 DL 中的流量卸载、UL 中的干扰抑制、数据速率和 HetNets 中的能量效率方面的有效性。

更新日期：2021-08-16

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11