针对物联网应用时对EPCIS(electronic product Code information services)数据库的大量的查询请求,在已有的EPCIS查询机制的研究基础上,提出了一种基于缓存的EPCIS查询机制.通过减少对EPCIS数据库的访问次数以缩短请求响应时间,提出了一种基于代价函数的缓存替换算法.研究结果表明,与现有的一些传统缓存替换算法相比,本文给出的缓存替换算法能进一步提高EPCIS 查询模块的效率.
With the increasing requests to the EPCIS for application in internet of things,we put forward a cache based query mechanism for EPCIS on the basis of exisiting query mechanism.The response time of query request can be shortened,when the counts of client application access to the EPCIS database is reduced.In addition,we also get a replacement algorithm based on cost function.The simulation experimental results show the proposed replacement algorithm has better performance than some other cache replacement algorithms which further improves the efficiency of the EPCIS query module.
[1] PILAR M L,PEDRO M,JOSEMARIA M S,et al.An efficient distributed discovery service for EPCglobal network in nested package scenarios[J].Journal of Network and Computer Applications,2011,34(3): 925-937.DOI:10.1016/j.jnca.2010.04.018.
[2] TAEWOO N,KEUNHYUK Y.Business-aware framework for supporting RFID-enabled applications[J].Journal of Network and Computer Applications,2011,34(3): 958-971.
[3] 李佶.EPC网络信息服务查询机制研究与开发[D].上海:上海交通大学,2012. LI J.Research and realization of information service query mechanism in EPC network[D].Shanghai: Shanghai Jiao Tong University,2012.
[4] ZHAO W,LI X P,LIU D X,et al.SaaS mode based region RFID public service platform[Z].3rd International Conference on Convergence and Hybrid Information Technology,2008.DOI: 10.1109/ICCIT.2008.88.
[5] 傅啸.面向防伪应用的 RFID 公共服务平台安全技术研究与开发[D].上海:上海交通大学,2011. FU X.Research and developing for security technology of RFID public services infrastructure to anti-counterfeiting [D].Shanghai: Shanghai Jiao Tong University,2011.
[6] 李再进.EPC网络中信息服务的设计与应用研究[D].武汉:华中科技大学,2005. LI Z J.The research of design and application of information service in the EPC network[D].Wuhan: Huazhong University of Science and Technology,2005.
[7] CAO P,IRANI S.Cost-aware WWW proxy caching algorithms[J].Proceedings of the Usenix Symposium on Internet Technology and Systems,1997,12(97): 193-206.
[8] PODLIPNIG S,BÖSZÖRMENYI L.A survey of web cache replacement strategies[J].ACM Computing Surveys(CSUR),2003,35(4):374-398.DOI: 10.1145/954339.954341.
[9] BATALIN M A,SUKHATME G S.The analysis of an efficient algorithm for robot coverage and exploration based on sensor network deployment[Z].The 2005 IEEE International Conference on Robotics and Automation.Barcelona,Spain,2005.DOI: 10.1109/ ROBOT.2005.1570648.
