虚拟两天线蜂窝网络中考虑中继公平性的协作博弈调度方法(英文)

In thsssse cellular network, Relay Stations (RSs) help to improve the system performance; however, little work has been done considering the fairness of RSs. In this paper, we study the cooperative game approaches for scheduling in the wireless relay networks with two-virtual-antenna array mode. After defining the metric of relay channel capacity, we form a cooperative game for scheduling and present the interpretation of three different utilization objectives physically and mathematically. Then, a Nash Bargaining Solution (NBS) is utilized for resource allocation considering the traffic load fairness for relays. After proving the existence and uniqueness of NBS in Cooperative Game (CG-NBS), we are able to resolve the resource allocation problem in the cellular relay network by the relay selection and subcarrier assignment policy and the power allocation algorithm for both RSs and UEs. Simulation results reveal that the proposed CG-NBS scheme achieves better tradeoff between relay fairness and system throughput than the conventional Maximal Rate Optimization and Maximal Minimal Fairness methods.     

基于集中监控数据资源的4G基站退服故障预警模型

4G无线基站设备是直接影响信息通信网络用户服务质量的重要环节,而4G无线基站退服故障将直接阻断用户正常通信.针对上述问题,基于集中监控告警消息数据资源通过关联规则挖掘和时间追溯推演分析,实现了4G基站退服故障的短期预警.基于集中监控设备性能数据资源通过网元分类(数据清洗、特征筛选、网元聚类)、指标降维(按簇分组、主成分分析)、主成分表达式与退服故障关联分析、性能指标选取及阈值分析实现了4G基站退服故障长期预警,经测试可准确预测次月27.8％的4G基站设备退服故障.     

基于网络的视频点播系统的构建

基于网络的视频点播系统主要包括计算机数字视频监控中的计算机数字视频处理技术、数字编码技术、计算机数字视频网络传输技术等。本论文对网络视频点播系统从基本原理到基本的实现手段进行了较全面的基础性介绍。     

基于区域覆盖的协同干扰任务分配模型及算法

针对保证目标区域干扰覆盖和最小能量消耗的优化目标,建立了小型干扰机区域分簇组网结构和基于多目标整数规划的协同干扰任务分配模型。在此基础上,研究了完全覆盖和不完全覆盖下的任务分配方案,针对其中的单目标覆盖和多目标覆盖问题分别建立多选择背包模型和多选择多维背包模型进行求解。结合遗传算法和启发式算法,设计了基于整数编码的混合...     

基于CFD双a型燃气辐射管燃烧的传热特性

运用亚音速烧嘴技术和烟气循环技术,设计了一种烟气高循环倍率的新型双a型辐射管,采用涡耗散燃烧模型和离散坐标辐射模型计算其燃烧传热过程。结果表明:42.6%的CH4在烧嘴内燃烧,57.4%的CH4在辐射管中心管内长度为800mm、直径为40mm的区域内燃烧;辐射管中心管内,循环烟气使火焰和气体等温线呈"椭圆型"分布,三通管和支管内,流动惯性使气体等温线呈"偏心圆"分布;双a型辐射管热效率为70.8%,壁面最高温度1065℃,最大温差79℃,中心管壁周向温差0~21℃,三通管及支管管壁周向温差0~15℃,整个辐射管管壁径向温差0~2.5℃。     

网络目标环境模拟中的主机模型

根据网络目标环境模拟对主机的需要,提出一个主机模型。采用协议栈指纹模拟、进程模拟和文件系统模拟的方法,模拟主机操作系统的个性特征和网络特性。该模型使主机具备模拟服务器和客户机的双重能力,并且拥有丰富的文件资源。实验表明,使用该模型模拟的主机具备个性特征,可以被探测、扫描。     

基于分布式优化的协同干扰任务分配研究

为保证目标区域干扰覆盖和最小能量消耗的优化目标,建立协同干扰任务分配模型。在分布式协同优化框架下,将集中式任务分配问题,转换为各个虚任务区内小规模的分布式优化问题,采用分解-协调优化模式和启发式遗传算法相结合的方法,实现对各个子区域优化问题的二次迭代求解。仿真结果表明,分布式协同优化方法能够有效降低协同干扰任务分配问题的求解规模,避免“维数灾”,具有可行性。     

形式描述技术在通信协议安全分析中的应用

讨论在通信协议安全分析中形式描述技术的使用方法。重点研究在协议模型的基础上建立层次化的协议攻击行为模型的方法,对所建模型进行形式化验证和脆弱性分析,根据验证和分析结果提出防护措施,设计安全方案。给出Petri网建模实例,提出形式描述技术在通信协议安全分析中的一些其他应用。     

热洗清蜡工艺技术对比的思考及应用

随着社会经济与科技实力的稳步增涨,为油田事业实现自身经济发展模式与技术的革新与优化带来了前所未有的发展机遇。而与此同时,热洗清蜡工艺技术作为采油工作的重要组成部分,对其进行不同技术之间的对比及其在采油的实际工作之中更好应用的探索对于推动我国油田事业实现自身经济利益最大化的发展目标具有重要的意义。本文就基于以上此种因素,对热洗清蜡工艺技术的对比及其应用进行相关阐述,希望能够给从事相关行业的工作者提供帮助。     

一种能量高效的基于主成分分析的多接入网络选择策略

This paper brings forward a novel dynamic multiple access network selection scheme (ND MAS), which could achieve less energy loss and improve the poor adaptive capability caused by the variable network parameters. Firstly, a multiple access network selection mathematical model based on information theory is presented. From the perspective of information theory, access selection is essentially a process to reduce the information entropy in the system. It can be found that the lower the information entropy is, the better the system performance fulfills. Therefore, this model is designed to reduce the information entropy by removing redundant parameters, and to avoid the computational cost as well. Secondly, for model implementation, the Principal Component Analysis (PCA) is employed to process the observation data to find out the related factors which affect the users most. As a result, the information entropy is decreased Theoretical analysis proves that system loss and computational complexity have been decreased by using the proposed approach, while the network QoS and accuracy are guaranteed. Finally, simulation results show that our scheme achieves much better system performance in terms of packet delay, throughput and call blocking probability than other currently existing ones.