LTE网络下D2D通信资源分配与调度方案的研究

发布时间：2018-05-30 16:20

本文选题：D2D + 干扰管理　；参考：《南京邮电大学》2017年硕士论文

【摘要】：LTE网络下的D2D通信是一种邻近用户无需经过基站或核心网而直接通信的新型通信技术。D2D通信技术的优势在于可以增强网络性能,如提高频谱效率、减少通信时延、增大系统吞吐量等。但是,D2D通信对蜂窝网络会产生严重干扰,因此必要的干扰管理技术尤为重要。为了解决干扰问题,本文分别针对一对一、多对一资源复用方式提出了两种改进的无线资源分配方案,有效降低干扰,从而增强了蜂窝网络性能。针对一对一资源复用方式,本文提出了一种基于稳定分配的多回合迭代(Multi-Round Iteration Stable Matching,MRI SM)D2D资源分配方案。在稳定分配的基础上引入多回合迭代算法完成二次或多次优化匹配,以最大化系统吞吐量为目标,使每对D2D复用更合适的频谱资源。通过仿真分析可知,该方案能有效优化D2D性能,提高系统吞吐量。针对多对一资源复用方式,本文提出了另一种基于双重干扰限制区域分簇(Dual Interference Limited Areas Clustering,DILA-Clustering)的D2D资源分配方案。先以蜂窝用户为中心构建分簇,然后考虑蜂窝用户和D2D用户各自的干扰限制区域,为每对D2D用户选择合适的分簇,最后完成资源分配。该方案中D2D采用自由复用蜂窝用户所占资源块的方式进入分簇,无需重复计算多对D2D用户相互之间的干扰,大大降低了计算复杂度。仿真表明,本文提出的方案有效提高了D2D的被服务率,提升了整个蜂窝系统的吞吐量。
[Abstract]:D2D communication in LTE network is a new communication technology, which can communicate directly without passing through base station or core network. The advantage of D2D communication technology is that it can enhance network performance, such as improving spectrum efficiency and reducing communication delay. Increase system throughput, etc. However, D2D communication can cause serious interference to cellular network, so the necessary interference management technology is particularly important. In order to solve the interference problem, two improved radio resource allocation schemes are proposed to reduce interference and enhance the performance of cellular networks. For a resource reuse scheme, a multi-round Iteration Stable matching SM)D2D resource allocation scheme based on stable allocation is proposed in this paper. On the basis of stable allocation, a multi-round iterative algorithm is introduced to achieve the quadratic or multiple optimal matching, which aims at maximizing the system throughput, and makes each pair of D2D multiplexing more suitable spectrum resources. The simulation results show that this scheme can effectively optimize D2D performance and improve system throughput. For many-to-one resource reuse, another D2D resource allocation scheme based on dual Interference Limited Areas clustering (DILA-Clustering) is proposed. Firstly, the cluster is constructed with the cellular user as the center, and then the interference limitation areas of the cellular user and the D2D user are considered to select the appropriate clustering for each pair of D2D users, and finally complete the resource allocation. In this scheme, the free reuse of the resource blocks occupied by cellular users is used to enter the cluster, and the interference between D2D users is not repeatedly calculated, which greatly reduces the computational complexity. Simulation results show that the proposed scheme can effectively improve the D2D service rate and enhance the throughput of the whole cellular system.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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