摘要
随着异构性网络和网络服务的不断发展与成熟,服务发现平台(Service DiscoveryProtocol,SDP)模型的逐渐完善与其系统可靠性研究工作相对滞后的矛盾日益突出。为此,文章以可靠性理论为基础,重点讨论了目录式、分布式以及混合式3种SDP的可靠性系统模型,详细分析和推导了3种模型的系统可靠度和平均寿命分布函数,从定性角度给出可靠性评价方法。同时,结合基于OSGi架构的SDP模型实例,给出了如何利用文中提出的可靠性模型进行复杂SDP系统可靠性定量评价的主要步骤。借助实例分析可知,在提供必要的目标系统背景下,该评价模型能够从定性和定量角度对系统可靠性进行有效评价。
With the development and maturation of heterogeneous networks with network services, the contradiction between the gradual perfection of Service Discovery Protocol （SDP） and the lagging of system reliability research are becoming increasingly acute. Therefore in this paper, the reliability model of directory-based, distributed query-based and hybrid architecture SDP are studied based on reliability theory. The distribution function of system reliability and average-life in these three types of SDP were fully analyzed and deduced, and a method of reliability evaluation is given from qualitative view. In addition, an actual example based on OSGi is utilized to show the important steps of how to use the methods presented in this paper to study the system reliability for complex SDP. It is known by example analysis, with the neeessary target system background offered, that this model can effectively evaluate system reliability from both qualitative and quantitative level.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2009年第3期425-430,共6页
Journal of Northwestern Polytechnical University
关键词
服务发现协议
可靠性评价
平均寿命分布
Service Discovery Protocol（SDP）
reliability evaluation
average life-time distribution
