数据分布服务(Data Distribution Service,DDS)是对象管理组织(OMG)颁布的分布式实时系统中数据发布的一个最新规范,该规范描述了分布式实时系统中数据发布、传递和接收的接口和行为,定义了以数据为中心的发布-订阅(Data-Centric Publis...数据分布服务(Data Distribution Service,DDS)是对象管理组织(OMG)颁布的分布式实时系统中数据发布的一个最新规范,该规范描述了分布式实时系统中数据发布、传递和接收的接口和行为,定义了以数据为中心的发布-订阅(Data-Centric Publish-Subscribe,DCPS)机制,提供了一个与平台无关的数据模型。对该规范进行了较详细的介绍,给出了它的两层框架结构,对DCPS层进行了探讨和研究,并将其与CORBA进行了比较,总结了其通信特点,其实际应用表明DDS是非常适合实时通信的。展开更多
DDS即数据分发服务(Data Distribution Service),是由OMG组织制定的一套API与互操作性协议规范,定义了一种以数据为中心的发布/订阅架构,能够满足系统实时、高效的数据交互需求。在实现对DDS技术分析的基础上,利用DDS产品设计了一组DDS...DDS即数据分发服务(Data Distribution Service),是由OMG组织制定的一套API与互操作性协议规范,定义了一种以数据为中心的发布/订阅架构,能够满足系统实时、高效的数据交互需求。在实现对DDS技术分析的基础上,利用DDS产品设计了一组DDS本地通信接口,并搭建了一套分布式数字仿真系统,实现了多个分布式节点之间简单、高效的数据交互,并可以动态加入多个仿真节点,实现系统数据共享和节点的动态扩展。展开更多
To improve data distribution efficiency a load-balancing data distribution LBDD method is proposed in publish/subscribe mode.In the LBDD method subscribers are involved in distribution tasks and data transfers while r...To improve data distribution efficiency a load-balancing data distribution LBDD method is proposed in publish/subscribe mode.In the LBDD method subscribers are involved in distribution tasks and data transfers while receiving data themselves.A dissemination tree is constructed among the subscribers based on MD5 where the publisher acts as the root. The proposed method provides bucket construction target selection and path updates furthermore the property of one-way dissemination is proven.That the average out-going degree of a node is 2 is guaranteed with the proposed LBDD.The experiments on data distribution delay data distribution rate and load distribution are conducted. Experimental results show that the LBDD method aids in shaping the task load between the publisher and subscribers and outperforms the point-to-point approach.展开更多
文摘数据分布服务(Data Distribution Service,DDS)是对象管理组织(OMG)颁布的分布式实时系统中数据发布的一个最新规范,该规范描述了分布式实时系统中数据发布、传递和接收的接口和行为,定义了以数据为中心的发布-订阅(Data-Centric Publish-Subscribe,DCPS)机制,提供了一个与平台无关的数据模型。对该规范进行了较详细的介绍,给出了它的两层框架结构,对DCPS层进行了探讨和研究,并将其与CORBA进行了比较,总结了其通信特点,其实际应用表明DDS是非常适合实时通信的。
文摘DDS即数据分发服务(Data Distribution Service),是由OMG组织制定的一套API与互操作性协议规范,定义了一种以数据为中心的发布/订阅架构,能够满足系统实时、高效的数据交互需求。在实现对DDS技术分析的基础上,利用DDS产品设计了一组DDS本地通信接口,并搭建了一套分布式数字仿真系统,实现了多个分布式节点之间简单、高效的数据交互,并可以动态加入多个仿真节点,实现系统数据共享和节点的动态扩展。
基金The National Key Basic Research Program of China(973 Program)
文摘To improve data distribution efficiency a load-balancing data distribution LBDD method is proposed in publish/subscribe mode.In the LBDD method subscribers are involved in distribution tasks and data transfers while receiving data themselves.A dissemination tree is constructed among the subscribers based on MD5 where the publisher acts as the root. The proposed method provides bucket construction target selection and path updates furthermore the property of one-way dissemination is proven.That the average out-going degree of a node is 2 is guaranteed with the proposed LBDD.The experiments on data distribution delay data distribution rate and load distribution are conducted. Experimental results show that the LBDD method aids in shaping the task load between the publisher and subscribers and outperforms the point-to-point approach.
