基于频谱地图的动态频谱管理及其半实物仿真

为了在动态频谱管理网络中快速获得频谱信息,提出了基于频谱地图的区域动态频谱管理框架。该架构由区域频谱管理中心、动态频谱接入网络和用频节点组成,其中区域频谱管理中心负责建立和下发频谱地图,提供频谱地图信息服务并实施网络管理和频谱实时协调。针对网络以较低开销快速获得频谱地图的需求,提出了定期分发、按需分发和更新实时分发3种频谱地图分发方式。基于通用软件无线电平台建立了半实物仿真系统对提出的架构进行仿真验证。仿真结果表明,在提出的架构下网络能够更充分地利用频谱资源,在网络吞吐量、时延和排队长度等指标上均有明显改善。

Spectrum map based dynamic spectrum management and hardware in loop simulation

To meet the requirement of acquiring spectrum information quickly from the networks under dynamic spectrum management (DSM) system, a spectrum map based DSM framework was proposed. The framework is composed of regional spectrum management center (RSMC), dynamic spectrum access network and spectrum users, in which RSMC is responsible for constructing and distributing spectrum map to provide spectrum map information service as well as to execute network management and real-time spectrum coordination. For the demand of obtaining spectrum map quickly with low overhead, three spectrum map distribution strategies were proposed, including periodic distribution, on-demand distribution, and real-time distribution on updating. A hardware in loop simulation system was developed based on the universal software radio platform to evaluate the proposed framework. Simulation results demonstrate that networks under the proposed framework can make better use of the spectrum and the system performances on throughput, and that delay and queue length are improved markedly.