| 摘要: |
| 针对基站之间距离近、网络数量庞大的超密集网络中切换过程存在干扰以及频繁切换问题，提出了一种基于预判决的模糊逻辑切换算法。算法在计算用户接收信号的信干噪比基础上，预筛选出干扰较小的网络，计算用户在筛选出的候选网络中的停留时间，当停留时间大于门限值时对候选网络使用基于模糊逻辑的逼近理想解排序算法。通过模糊逻辑优化网络属性参数，进而使用逼近理想解排序算法对候选网络进行排序。排序过程中，使用修正后的贴近度计算方式使计算结果更加精确。仿真实验证明，该算法在超密集异构网络切换中可以有效降低切换次数，减少网络阻塞概率，有效提升用户服务质量。 |
| 关键词: 5G超密集网络(UDN) 异构网络 垂直切换 模糊逻辑 逼近理想解排序法(TOPSIS) |
| DOI：10.20079/j.issn.1001-893x.220425004 |
|
| 基金项目:辽宁省教育厅面上基金项目(LJKZ1184) |
|
| A Handover Algorithm Based on Fuzzy Logic for 5G Ultra-dense Heterogeneous Networks |
| LIU Chunling,TIAN Yuqi,ZHANG Qizhen,FENG Jinlong |
| (School of Information Engineering,Dalian University,Dalian 116000,China) |
| Abstract: |
| In an ultra-dense network(UDN) with close distances between base stations and a large number of networks,a pre-decision-based fuzzy logic handover algorithm is proposed to solve the problem of interference and frequent handover in the handover process.On the basis of calculating the signal to interference noise ratio of the signal received by the user,the algorithm performs prescreening to select the network with less interference,and calculates the user’s resident time in the screened candidate network.When the resident time is greater than the threshold value,it carries out the Technique for Order Preference by Similarity to Ideal Solution(TOPSIS) based on fuzzy logic for the candidate network.The attribute parameters of the network are optimized by fuzzy logic.And then the candidate networks are sorted by TOPSIS.In the sorting process,the modified nearness degree method is used to make the calculation results more accurate.The simulation results show that the algorithm can effectively reduce the number of handovers,reduce the probability of network congestion,and effectively improve the quality of user service in ultra-dense heterogeneous networks. |
| Key words: 5G ultra-dense network(UDN) heterogeneous network virtical handover fuzzy logic technique for order preference by similarity to an ideal solution(TOPSIS) |
