VANET中基于移动IPv6的快速切换策略研究

针对车载自组织网络在城市道路车流量大的情况,车辆在不同的路边基站之间频繁地进行上下文切换,从而导致IPv6的移动性支持协议切换时延过长的问题,提出了一种基于代理移动路由的快速切换方案。采用代理移动路由在3G/WiMAX通信域的切换触发其它802.11p通信域内的车辆发生切换的方法,来达到宏切换与微切换相结合的目的,从而实现批量式快速切换。分析结果表明,该方案较现有方案提高了切换效率,减小了切换时延。     

一种基于虚拟力的分布式Voronoi控制策略

针对无线移动传感器网络在目标区域的覆盖问题,提出了一种基于移动距离的局部分布式算法,利用Voronoi多边形的特征对目标区域进行有效的分割,运用力学的矢量概念,根据Voronoi图的边和顶点确定虚拟力的方向和大小即节点的移动方向和距离,提出了基于移动距离的分布式Voronoi控制算法,以确定节点移动状态。仿真实验表明,所提算法不仅使得节点在目标区域实现了高覆盖率,同时在时间上也较早地达到了收敛,优化了网络的覆盖控制。     

基于配置变迁的业务流程模型优化分析方法

为了灵活适应市场需求,业务流程模型的优化分析显得越来越重要。已有的方法大部分基于静态定位变化区域,进而对该区域进行优化,具有一定的局限性。基于Petri网的方法和行为轮廓的思想从行为角度来动态分析业务流程中的变化部分,利用日志与模型的匹配关系以及动态定位来确定模型中的变化域,考虑接口部分,利用适合度和行为适当性,通过配置变迁优化模型,然后利用行为轮廓一致性度判定最优模型,最后用实例验证该方法的可行性。     

Privacy‐preserving targeted mobile advertising: requirements,design and a prototype implementation

With the continued proliferation of mobile devices, the collection of information associated with such devices and their users—such as location, installed applications and cookies associated with built‐in browsers—has become increasingly straightforward. By analysing such information, organisations are often able to deliver more relevant and better focused advertisements. Of course, such targeted mobile advertising gives rise to a number of concerns, with privacy‐related concerns being prominent. In this paper, we discuss the necessary balance that needs to be struck between privacy and utility in this emerging area and propose privacy‐preserving targeted mobile advertising as a solution that tries to achieve that balance. Our aim is to develop a solution that can be deployed by users but is also palatable to businesses that operate in this space. This paper focuses on the requirements and design of privacy‐preserving targeted mobile advertising and also describes an initial prototype. We also discuss how more detailed technical aspects and a complete evaluation will underpin our future work in this area. Copyright © 2016 John Wiley & Sons, Ltd.     

Region with velocity constraints: map information and its usage for safe motion planning of a mobile robot in a public environment

Recently, various autonomous mobile robots have been developed for practical use. To support the coexistence of robots and humans in real environments, we propose a concept named ‘Region with Velocity Constraints (RVC),’ which is set around hazardous areas. RVCs are regions where the velocities of the robot are constrained to predefined values. Inside the RVCs, the robot has to reduce its translational velocity to avoid predicted hazards such as collisions with obstacles, and to reduce its rotational velocity to prevent undesirable motions such as sharp turns. We also propose a motion planning method for navigating the mobile robot in an environment with RVCs based on the Navigation Function and Global Dynamic Window Approach. Our method generates a trajectory satisfying both translational and rotational velocity constraints to be compatible with the surroundings. Moreover, to demonstrate the validity of our method, we performed numerical simulations and experiments.     

Continuance usage of corporate SNS pages: A communicative ecology perspective

This study develops a research model that explains the continuance of corporate social network service (SNS) pages. In order to find antecedents that influence end users’ continuance intention, this study adopts communicative ecology theory from media and communication studies. Results indicate that the quality of social interaction is the most salient feature, as indicated by the fact that it has the highest impact on perceived usefulness and enjoyment. Moreover, content quality also increases both perceived usefulness and enjoyment, while SNS platform quality and service quality increase perceived usefulness only. In addition, perceived network size moderates the impact of social interaction quality on perceived enjoyment.     

Collaborative distribution between two logistics service providers

Mathematical models are described for collaborative distribution between two logistics service providers (LSPs). We find that (a) collaborative distribution is conditionally profitable for LSPs, and the conditions for cooperation are given; (b) LSPs save more costs primarily by shortening the delivery distance and decreasing delivery speed; (c) collaborative distribution makes the delivery time either shorter or longer; (d) if one LSP changes its equilibrium price, the total profit conditionally increases, and this condition is related to demand structure and delivery cost structure; and (e) collaborative distribution can solve the personalization of delivery time and reduce pollution to some extent. For the companies sharing the incremental profit, we characterize a transfer payment contract that includes fixed and variable fees. Our findings suggest that LSPs should adopt collaborative distribution to formulate an optimal distribution plan to save costs and shorten the delivery time, and should select partners with smaller cost parameters and both different and moderate speeds. In addition, warehouse and vehicle sharing are beneficial to the implementation of collaborative distribution.     

云计算环境下基于时间和可靠性的调度策略

云计算中,调度策略对于用户任务的运行和服务提供方均有很大的影响,直接影响到云平台的运行效果。针对传统任务调度算法难以适用于云计算环境这一问题进行了研究,采用由星型结构演化而成的多代理模型,首先给出多代理模型的体系结构,然后针对多代理系统,提出了基于服务时间和可靠性为优化目标的任务调度策略,并采用模拟退火算法进行求解。最后进行了仿真实验,实验结果表明我们的调度策略是高效的。     

移动端融合通信中企业通讯录增量更新的研究

近年来,随着移动互联网的快速发展,通信行业也进入了移动时代,企业的通信业务可以借助移动互联网结合融合通信拓展到移动领域.企业通讯录作为企业通信的入口起着至关重要的作用.传统的企业通讯录更新技术未考虑到移动互联网资源有限的特点已经不适合用于目前的融合通信中.因此本文提出了基于LDAP目录服务实现增量更新的方法,以此来降低移动端和服务器端的资源消耗.最后通过将传统的企业通讯录中全量更新技术与本文提出的增量更新技术作实验对比分析,验证增量更新在移动互联网方面优于全量更新.     

基于HTTPS的移动安全防护体系

随着移动互联网技术、无线网络技术以及智能化移动终端的不断发展,移动交互平台已经成为企业信息化的重要标志,然而面对日益严峻的网络安全威胁,移动交互平台建设过程中必须充分考虑用户在接入或者使用过程中遇到的各种安全问题.本文以江苏电力移动交互平台为研究对象,结合公司业务特点,提出了一种全新的移动安全防护方案,确保移动交互平台的数据安全性、有效性以及通信链路的保密性,满足了电力客户以及企业员工的移动交互需求.