摘要
在考虑接入竞争期内同频干扰和切换期效应的基础上,提出了基于信号与干扰噪声比的VDL2切换判决方法。为了分析该方法的优越性和可行性,以动态信令交互、切换定时、移动节点和多频点接入为关键技术,建立了基于OPNET的VDL2多地面站切换仿真模型。仿真实验表明:基于信号与干扰噪声比的切换方法能根据飞行节点密集度完成切换,可有效地减少被动切换比例;同时,存在最佳切换阈值点,可使吞吐量、延时性能达到最优。从而,为现行的基于信号强度的切换方法提供了一条改进途径。
From the view of co-channel interference and handover packet loss, a VDL2 handoff decision method was put forward based on Signal to Interference plus Noise Ratio（SINR）. In order to testify its superiority and feasibility, a VDL2 handoff model was established on OPNET taking dynamic signaling interaction, handoff timing, mobile node and multi-frequency access as the key technology. Simulation experiments prove that the proposed method can realize handoff according to the flight nodes density and reduce the passive handoff ratio effectively. Further simulations also show that there exists optimal handoff threshold which can make the performance such as throughput and delay to be optimized, which supplies a way to improve the current signal-strength based handoff method.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2014年第6期1384-1390,共7页
Journal of System Simulation
