论文标题
向大都市移动用户传播内容的绩效问题
Performance issues in content dissemination to metropolitan mobile users
论文作者
论文摘要
在本文中，我们考虑了一个有兴趣收集来自多个来源的信息感兴趣的城市地区的一组异质码头。该组包括移动节点（行人和车辆）和固定终端。特别是，每个终端旨在检索以节点位置为中心的有限的感兴趣区域（ROI）（ROI）。由于数据项可能会随着时间而变化，因此所有节点都必须努力访问最新版本。本文的目的是评估每个节点能够通过本地广播通信收集简单分布式数据收集和共享的信息的信息。我们研究了整个区域中信息更新的扩散，评估节能政策在行人设备运行的协议版本中的影响，以及对转发策略中节点的位置和运动的上下文认识的影响。我们在本文中提供的研究是通过模拟进行的。为此，我们开发了一个离散的事件模拟器，以从Udelmodels工具获得的移动性和无线电传播轨迹为基础，该工具允许获得逼真的移动性和无线电传播痕迹。
In this paper we consider a set of heterogeneous terminals in a urban area that are interested in collecting the information originated from several sources. This set includes mobile nodes (pedestrian and vehicles) and fixed terminals. In particular, each terminal aims at retrieving the data items in a limited region of interest (ROI) centered around the node position. Since data items may change over time all nodes must strive for having access to the latest version. The goal of the paper is to evaluate the amount of information each node is able to gather (coverage) resorting to simple distributed data collection and sharing through local broadcast communications. We study the diffusion of information updates in the whole area, evaluate the impact of energy saving policies in the protocol version run by pedestrian devices, and the impact of contextual awareness about location and motion of nodes in the forwarding policies. The study we present in this paper has been carried out through simulation. To this end we develop a discrete event simulator working on top of mobility and radio propagation traces obtained from the UDelModels tools that allow to obtain realistic traces of mobility and radio propagation.
