网络服务体系结构及其形式化模型的研究

下一代网络的本质是以提供网络服务为核心的,能够支撑各国政治、经济、文化、教育、国防等各个领域全面信息化的信息基础设施,单纯基于通信功能来进行层次划分的传统网络体系结构已不能适应下一代网络发展的需要.提出了一种基于交互的网络服务体系结构(INSA),作为从服务角度研究下一代网络的下一代网络服务体系结构参考模型,并详细论述了INSA参考模型的总体结构和各层功能.用构件来描述网络实体,用连接件来描述构件间交互,建立起了下一代网络服务体系结构的形式化模型,为形式化分析和验证网络服务体系结构的总体性质以及进一步研究网络服务体系结构中与服务相关的各种性质奠定了基础.

基于智能化建筑的社区网络服务系统设计

文章给出了基于智能化建筑的社区网络服务系统 ( DNSSIB)体系结构和功能描述 ,并讨论了硬件。

基于OGSA的网格数据访问和服务

给出了在OGSA(Open Grid Services Architecture)[2,6]框架中的数据访问和服务的基本观点，提出了支持数据访问和集成服务的OGSA框架OGSA-DAI(OGSA architecture to support data aceess and integration services)的扩展。OGSA-DAI结构打算为一般性的数据访问和集成服务定义OGSA 接口类型,以便成为不同的数据源访问的统一接口。

网格工作流研究

网格工作流是随着网格计算技术的发展而产生的一种新型协同计算技术。文中对国外的一些网格工作流的建模、体系结构和流程描述语言作了进一步的研究,介绍了网格和工作流的相关技术,然后给出了网格工作流的定义和网格工作流与传统工作流的区别,最后简要介绍了4个比较典型的网格工作流,并提出网格工作流的未来发展趋势。

公务执法船语音信号集成方案设计与研究

公务执法船面临着300万平方公里的海洋维权任务,构建一个完善的通信指挥平台,对于海上执法船在广阔的管辖海域执勤执法,正确履行历史使命,至关重要。本文基于网络服务体系结构,针对公务执法船只通信装备现状,利用HTTP协议和XML相关标准,运用集成软件技术对执法船只的语音信息提出整合设计方案。

A P2P streaming service architecture with distributed caching

Multimedia streaming served through peer-to-peer (P2P) networks is booming nowadays. However, the end-to-end streaming quality is generally unstable due to the variability of the state of serve-peers. On the other hand, proxy caching is a bandwidth-efficient scheme for streaming over the Internet, whereas it is a substantially expensive method needing dedicated powerful proxy servers. In this paper, we present a P2P cooperative streaming architecture combined with the advantages of both P2P networks and multimedia proxy caching techniques to improve the streaming quality of participating clients. In this frame- work, a client will simultaneously retrieve contents from the server and other peers that have viewed and cached the same title before. In the meantime, the client will also selectively cache the aggregated video content so as to serve still future clients. The associate protocol to facilitate the multi-path streaming and a distributed utility-based partial caching scheme are detailedly dis- cussed. We demonstrate the effectiveness of this proposed architecture through extensive simulation experiments on large, Inter- net-like topologies.

Smart Service System(SSS)：A Novel Architecture Enabling Coordination of Heterogeneous Networking Technologies and Devices for Internet of Things

In Internet of Things(IoT), the devices or terminals are connected with each other, which can be very diverse over the wireless networks. Unfortunately, the current devices are not designed to communicate with the collocated devices which employ different communication technologies. Consequently, the communication between these devices will be realized only by using the gateway nodes. This will cause the inefficient use of wireless resources. Therefore, in this paper, a smart service system(SSS) architecture is proposed, which consists of smart service terminal(SST), and smart service network(SSN), to realize the Io T in a general environment with diverse communication networks, devices, and services. The proposed architecture has the following advantages: i) the devices in this architecture cover multiple types of terminals and sensor-actuator devices; ii) the communications network therein is a converged network, and will coordinate multiple kinds of existing and emerging networks. This converged network offers ubiquitous access for various sensors and terminals; iii) the architecture has services and applications covering all smart service areas. It also provides theadaptability to new services and applications. A SSS architecture-based smart campus system was developed and deployed. Evaluation experiments of the proposed smart campus system demonstrate the SSS's advantages over the existing counterparts, and verify the effectiveness of the proposed architecture.

An SDN/NFV Based Framework for Management and Deployment of Service Based 5G Core Network

The traffic explosion and the rising of diverse requirements lead to many challenges for traditional mobile network architecture on flexibility, scalability, and deployability. To meet new requirements in the 5 G era, service based architecture is introduced into mobile networks. The monolithic network elements(e.g., MME, PGW, etc.) are split into smaller network functions to provide customized services. However, the management and deployment of network functions in service based 5 G core network are still big challenges. In this paper, we propose a novel management architecture for 5 G service based core network based on NFV and SDN. Combined with SDN, NFV and edge computing, the proposed framework can provide distributed and on-demand deployment of network functions, service guaranteed network slicing, flexible orchestration of network functions and optimal workload allocation. Simulations are conducted to show that the proposed framework and algorithm are effective in terms of reducing network operating cost.

A Novel Stateful PCE-Cloud Based Control Architecture of Optical Networks for Cloud Services

The next-generation optical network is a service oriented network,which could be delivered by utilizing the generalized multiprotocol label switching(GMPLS) based control plane to realize lots of intelligent features such as rapid provisioning,automated protection and restoration(P&R),efficient resource allocation,and support for different quality of service(QoS) requirements.In this paper,we propose a novel stateful PCE-cloud(SPC)based architecture of GMPLS optical networks for cloud services.The cloud computing technologies(e.g.virtualization and parallel computing) are applied to the construction of SPC for improving the reliability and maximizing resource utilization.The functions of SPC and GMPLS based control plane are expanded according to the features of cloud services for different QoS requirements.The architecture and detailed description of the components of SPC are provided.Different potential cooperation relationships between public stateful PCE cloud(PSPC) and region stateful PCE cloud(RSPC) are investigated.Moreover,we present the policy-enabled and constraint-based routing scheme base on the cooperation of PSPC and RSPC.Simulation results for verifying the performance of routing and control plane reliability are analyzed.