一种D2D缓存网络的延时与能耗优化方案 |
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引用本文: | 刘志揩,宋晖,潘达儒,吴群英. 一种D2D缓存网络的延时与能耗优化方案[J]. 华南师范大学学报(自然科学版), 2019, 51(6): 111-117. DOI: 10.6054/j.jscnun.2019110 |
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作者姓名: | 刘志揩 宋晖 潘达儒 吴群英 |
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作者单位: | 华南师范大学物理与电信工程学院,广州510006;华南师范大学物理与电信工程学院,广州510006;华南师范大学物理与电信工程学院,广州510006;华南师范大学物理与电信工程学院,广州510006 |
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基金项目: | 国家自然科学基金项目61801184国家自然科学基金项目61771206国家自然科学基金项目61471175 |
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摘 要: | 为了降低D2D通信网络中的能耗,设计了一种D2D缓存网络的优化方案:首先,计算初始状态下无线网络的延时与能耗;然后,考虑D2D通信并遍历所有已缓存文件的用户,选择具有延时与能耗改进空间的用户进行优化,以得到最优的用户与文件组合;最后,在满足D2D通信不会受到噪声干扰的前提下,根据用户设备的剩余电量,尽可能地降低用户的发射功率,并在每次通信前进行刷新,作为初始值存储在基站的矩阵之中.仿真结果表明:动态能耗缓存方案可以获得D2D通信网络中最优的平均能耗,并且在加入了能耗改进之后,系统延时与原算法基本相当,表明该缓存优化方案有效地提升了D2D通信网络的性能.
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关 键 词: | D2D通信 蜂窝通信 缓存网络 网络延时 能量消耗 |
收稿时间: | 2019-05-16 |
A Delay and Energy Optimization Scheme for D2D Caching Network |
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Affiliation: | School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China |
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Abstract: | In order to reduce the energy consumption in D2D communication network, an optimization scheme of D2D caching network is designed. Firstly, the delay and energy consumption of wireless network in the initial state are calculated. Then, considering D2D communication and traversing all the cached files, the users with space of improvement in delay and energy consumption are selected for optimization, and the optimal combination of users and files is obtained. Finally, on the premise that communication will not be disturbed by noise and in accordance with the residual power of user equipment, the transmitting power of user is reduced as much as possible, and refreshed before each communication and stored in the matrix of base station as the initial value. The simulation results show that the dynamic energy consumption cache scheme can obtain the optimal average energy consumption in D2D communication network, and after the energy consumption improvement, the system delay is basically the same as the original algorithm, which shows that the buffer optimization scheme effectively improves the perfor-mance of D2D communication network. |
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