物联网服务质量动态保障方法研究

发布时间：2018-04-27 20:47

本文选题：物联网服务 + 服务质量保障　；参考：《北京邮电大学》2014年博士论文

【摘要】：物联网技术的兴起给服务计算开辟了新的应用领域,物联网服务即是二者相结合的产物。在新的环境中,物联网服务的质量保障方法面临着新的挑战。对于服务的质量保障问题,本文从体系架构的角度出发,研究并细化了课题组提出的事件驱动、面向服务的物联网服务提供架构,提出了一种可扩展、低延迟的发布／订阅架构以保障物联网服务的数据分发质量,提出了一个无线传感器网络中基于簇的分组确认方法以保障物联网服务的数据传输质量。本文认为,从架构的角度对物联网服务的质量保障方法进行探索是一种有意义的尝试,对于新兴的物联网服务系统而言更具有针对性和指导意义,有助于快速构建物联网示范应用。本文的研究工作取得以下成果： (1)面向服务架构(Service-Oriented Architecture, SOA)和事件驱动架构(Event Driven Architecture, EDA)是互补的,而事件驱动、面向服务的架构(Event-Driven Service-Oriented Architecture, EDSOA)则是传统事件驱动架构的变革。在物联网这一新环境中,物联网服务面临着异构性、动态性等诸多挑战。为应对这些挑战,课题组提出了一种事件驱动、面向服务的物联网服务提供架构。本文对事件驱动、面向服务的物联网服务提供架构进行了细化、补充和完善工作,特别是接入代理、事件代理、复杂事件处理引擎、资源描述模型库、架构及各组成部分的处理流程方面。本文对该架构所做的细化、补充和完善工作,增强了架构的实用性和可操作性,促进了该架构的进一步完善。 (2)大规模、分布式、松散耦合的物联网环境中以异步的方式按需分发感知信息需要一种可扩展、低延迟的信息分发架构,为此本文提出了一种高效和可扩展的发布／订阅代理架构。作为事件驱动、面向对象架构的关键组成部分,该架构组织多个发布／订阅代理成一个基于Grid Quorum的点对点拓扑结构,以实现高效的主题搜索。它还利用了主题搜索算法和单跳缓存策略,以尽量减少搜索延迟。轻量级的RESTful接口使得该架构更适合物联网服务。成本理论分析和实验研究表明,该架构在搜索满意度显著提高的情况下没有影响搜索成本。 (3)为了为了保障物联网服务数据传输质量,有效提高分组交付率,本文提出了一个无线传感器网络中基于簇的分组确认方法。该方法累积多个节点的多个分组的确认到一个累积确认消息中,这自然可以比传统方法减少更多的分组确认消息。仿真结果表明,该方法有效地提高了分组交付率,降低了平均端到端延迟和确认消息路径的总长度,从而降低了网络负载。
[Abstract]:The rise of Internet of things technology has opened up a new application field for service computing. Internet of things service is the product of the combination of the two. In the new environment, the Internet of things service quality assurance methods are facing new challenges. For the problem of service quality assurance, this paper studies and refines the event-driven, service-oriented Internet of things service provider architecture proposed by the research group from the point of view of architecture. A low latency publish / subscribe architecture is proposed to ensure the quality of data distribution in Internet of things services. A cluster-based packet validation method is proposed to ensure the quality of data transmission in Internet of things services in wireless sensor networks. This paper holds that it is a meaningful attempt to explore the quality assurance method of Internet of things services from the perspective of architecture, which is more pertinent and instructive to the emerging Internet of things service system. Help to quickly build the Internet of things demonstration application. The research results of this paper are as follows: Service-Oriented Architecture (SOA) and event driven Architecture (Event Driven Architecture, EDA) are complementary, while Event-Driven Service-Oriented Architecture (EDSOA) is a change in traditional event-driven architecture. In the new environment of Internet of things, Internet of things services are facing many challenges, such as heterogeneity, dynamics and so on. To address these challenges, the team proposed an event-driven, service-oriented Internet of things service delivery architecture. In this paper, the architecture of event-driven, service-oriented Internet of things service is refined, supplemented and improved, especially for access agent, event agent, complex event processing engine, resource description model library, etc. Architecture and process aspects of each component. The detailed, supplementary and perfect work of this paper enhances the practicability and maneuverability of the architecture, and promotes the further improvement of the architecture. A large, distributed, loosely coupled Internet of things environment requires an extensible, low-latency information distribution architecture that distributes perceived information asynchronously on demand. Therefore, this paper proposes an efficient and extensible publish / subscribe proxy architecture. As a key component of an event-driven, object-oriented architecture, the architecture organizes multiple publish / subscribe proxies into a point-to-point topology based on Grid Quorum to achieve efficient topic search. It also uses topic search algorithm and single-hop cache strategy to minimize search latency. The lightweight RESTful interface makes the architecture more suitable for Internet of things services. The cost theory analysis and experimental research show that the structure has no effect on search cost without significant increase in search satisfaction. In order to ensure the quality of Internet of things service data transmission and improve the packet delivery rate, this paper proposes a clust-based packet confirmation method in wireless sensor networks. This method accumulates the acknowledgment of multiple packets of multiple nodes into a single cumulative acknowledgement message, which naturally reduces the number of packet acknowledgment messages compared with the traditional method. Simulation results show that the proposed method can effectively improve the packet delivery rate, reduce the average end-to-end delay and the total length of the acknowledgement message path, and thus reduce the network load.
【学位授予单位】：北京邮电大学
【学位级别】：博士
【学位授予年份】：2014
【分类号】：TP391.44;TN929.5

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