摘要
D2D(Device-to-Device)通信是一种受LTE蜂窝网络的控制但无需基站的中继即可实现移动终端间直接通信的新型通信技术。文中采用了D2D簇的概念,即同一个簇中的多个D2D用户对可共享相同资源。簇的引入可进一步提高频谱利用率,但也带来了更为复杂的干扰问题。为了解决该问题,提出了一种新的资源分配方案——基于图着色理论的D2D分簇资源分配方案。该方案分为两个阶段:首先只考虑D2D用户对之间的干扰情况,利用图着色理论为D2D用户对分簇;然后兼顾蜂窝用户和D2D的Qo S,为每个D2D簇分配资源。仿真分析可以看出,文中提出的方案将有效提高D2D的被服务率,并提升整个蜂窝网络的系统容量。
The device-to-device（ D2D） communication is a new technology for enabling the direct communication between mobile devices without the base station under the control of LTE cellular network. The concept of D2 D cluster is adopted,that is,the D2 D pairs share the same resource in the same cluster,thus increasing the spectrum efficiency but introducing a complicated interference problem. To resolve the problem,a new resource allocation scheme includes 2 steps： D2 D clustering resource allocation scheme based on the graph-coloring theory is presented. The scheme includes 2 steps： 1） using the graph-coloring theory to cluster the D2 D users,only considering the interference between the D2 D users. 2） allocating the resources under the precondition of the quality of service（ Qo S） of cellular users and D2 D satisfaction. Simulation analyses show that the proposed resource allocation scheme can increase the ratio of the served D2 D and enlarge the system capacity of cellular network.
出处
《南京邮电大学学报（自然科学版）》
北大核心
2015年第6期44-50,共7页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
基金
国家自然科学基金(61372125
61401234)
江苏省科技支撑计划(工业)项目(BE2013019)
南京邮电大学研究基金(NYKL201108)
江苏高校优势学科建设工程资助项目
关键词
D2D
LTE
分簇
吞吐量
D2D的被服务率
device-to-device（D2D）
LTE
clustering
throughput
ratio of the served D2D
