| 摘要: |
| 随着服务计算和物联网技术的发展,应用软件系统可以根据情境信息主动地为用户发现和提供服务.与传统的服务发现相比,主动服务发现的服务需求未知.系统需要根据采集的情境信息分析顾客服务需求,然后选择恰当的服务并加以提供.为此,提出一种基于情境感知事件的主动服务发现方法.首先,将感知的情境信息变化定义为情境事件,通过事件驱动图的方式定义情境事件之间的驱动关系;其次,对已有服务记录进行挖掘,通过事件-服务FP-TREE 描述服务与事件的关联关系;然后,在二者的基础上,根据当前感知的情境事件给出一种服务发现算法.实验结果表明,与现有广播式主动服务方法相比,该方法具有更高的查准率. |
| 关键词: 物联网 主动服务发现 情境感知 事件驱动图 事件-服务FP-TREE |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金(61033005); 国家高技术研究发展计划(863)(2009AA04Z120); 丹麦科技创新部国际合作研究项目(2106-08-0046) |
|
| Active Service Discovery Method Based on Context Aware Event |
|
MO Tong, CHU Wei-Jie, LI Wei-Ping, WU Zhong-Hai, LIN Hui-Ping
|
|
School of Software and Microelectronics, Peking University, Beijing 100871, China
|
| Abstract: |
| With the development of service computing and Internet of things, software systems can discover and provide service to customer actively based on context information. Compared with traditional service discovery, the service requirement is unknown in active service discovery. The system needs to analyze current demands from customer’s context-aware information and choose the proper service to provide. By using this as the focus, an active service discovery method based on context-aware event is proposed. First, the change of context-aware information is defined as context event, and the relationship between context events is expressed by event driven graph. Second, an event-service FP-TREE is built by mining service log. On the basis of the two definitions, a service discovery algorithm is realized according to the current context-aware event. Experimental results show that comparing with broadcasting which is the general active approach; this approach can promote the ratio of precision of active service discovery. |
| Key words: Internet of thing active service discovery context aware event driven graph event-service FP-TREE |
