| 摘要: |
| 在软件定义小蜂窝网络（Software-defined Small Cell Network,SDCN）中，面对小蜂窝间的干扰问题，现有基于编码和协作的缓存资源管理方案均未结合网络拓扑进行研究，也未考虑用户设备（User Equipment,UE）的接收缓存数，使得资源分配依旧面临不平衡的严峻挑战。针对上述问题，基于SDCN中的拓扑管理功能，运用贪婪算法以是否存在重叠干扰为判定条件对小基站（Small Base Station,SBS）进行划分。此外，以平衡UE接收编码缓存数量为目标，建立平衡调度缓存模型来调节不同区域SBS的分发时间，并借助二分搜索算法寻找其最优解。最后，通过设计自适应编码缓存策略，以应对网络负载的变化。仿真结果表明，所提方案在平衡资源分配与自适应方面性能优势明显，节约了网络资源，增加了网络的吞吐量。 |
| 关键词: 软件定义小蜂窝网络（SDCN） 平衡调度 拓扑管理 资源缓存 |
| DOI：10.20079/j.issn.1001-893x.211202005 |
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| 基金项目:国家自然科学基金资助项目（61971080） |
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| A balanced scheduling cache scheme in software-defined small cell network |
| YAO Yukun,REN Lidan,ZHANG Benjun,ZHOU Yang,HE Liang |
| (School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China) |
| Abstract: |
| In the software-defined small cell network(SDCN),there exists the problem of interference between small cells,the existing caching resource management schemes based on coding and cooperation neither combine with network topology,nor consider the receiving caching of user equipment(UE).Thereby,the resource allocation still faces severe challenges of imbalance.In response to these problems,based on the topology management function of the SDCN,the greedy algorithm is used to divide the small base station(SBS) according to whether there is overlapping interference as the judgment condition.In addition,to balance the UEs receiving code caching as the goal,a balanced scheduling cache model is established to adjust the distribution time of SBS in different regions,and its optimal solution is found through a binary search algorithm.Finally,an adaptive coding cache strategy is designed to cope with changes in network load.The simulation results show that the proposed scheme has obvious performance advantages in balancing resource allocation and self-adaptation,and it saves network resources and increases network throughput. |
| Key words: software-defined small cell network(SDCN) balanced scheduling topology-management resource caching |
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