In this paper, we present a novel approach to model user request patterns in the World Wide Web. Instead of focusing on the user traffic for web pages, we capture the user interaction at the object level of the web pa...In this paper, we present a novel approach to model user request patterns in the World Wide Web. Instead of focusing on the user traffic for web pages, we capture the user interaction at the object level of the web pages. Our framework model consists of three sub-models: one for user file access, one for web pages, and one for storage servers. Web pages are assumed to consist of different types and sizes of objects, which are characterized using several categories: articles, media, and mosaics. The model is implemented with a discrete event simulation and then used to investigate the performance of our system over a variety of parameters in our model. Our performance measure of choice is mean response time and by varying the composition of web pages through our categories, we find that our framework model is able to capture a wide range of conditions that serve as a basis for generating a variety of user request patterns. In addition, we are able to establish a set of parameters that can be used as base cases. One of the goals of this research is for the framework model to be general enough that the parameters can be varied such that it can serve as input for investigating other distributed applications that require the generation of user request access patterns.展开更多
对移动通信终端进行侦察与管控是维护正常通信秩序和电磁空间安全的应有之义。通信系统的行为模式是其重要的特征之一,传统的仅限于信号参数获取的侦察方法无法对移动通信系统的行为模式进行精准分析。针对这一问题,以终端与基站交互过...对移动通信终端进行侦察与管控是维护正常通信秩序和电磁空间安全的应有之义。通信系统的行为模式是其重要的特征之一,传统的仅限于信号参数获取的侦察方法无法对移动通信系统的行为模式进行精准分析。针对这一问题,以终端与基站交互过程中寻呼(Paging)信号与接入(Access)信号为突破口,充分利用该类信号特有的时频特征和明文传输特点,在对其进行有效截获的基础上,经过解调、解扰、解码得到其携带的信息比特。通过对信息比特实施解析,获得交互信令的含义,完成对移动通信终端行为模式的综合分析,揭示了寻呼与接入信号之间通信信息交互的时序逻辑关系,为信息对抗中的灵巧干扰提供了时间与信息字段上的侦察引导,是后续灵巧干扰的基础与前提。最后利用通信侦察接收机对第五代移动通信(5th Generation mobile communication,5G)信号进行实地侦收与分析,实验结果验证了所提方法的正确性与有效性,为移动通信终端的精准侦察与管控奠定了技术基础。展开更多
文摘In this paper, we present a novel approach to model user request patterns in the World Wide Web. Instead of focusing on the user traffic for web pages, we capture the user interaction at the object level of the web pages. Our framework model consists of three sub-models: one for user file access, one for web pages, and one for storage servers. Web pages are assumed to consist of different types and sizes of objects, which are characterized using several categories: articles, media, and mosaics. The model is implemented with a discrete event simulation and then used to investigate the performance of our system over a variety of parameters in our model. Our performance measure of choice is mean response time and by varying the composition of web pages through our categories, we find that our framework model is able to capture a wide range of conditions that serve as a basis for generating a variety of user request patterns. In addition, we are able to establish a set of parameters that can be used as base cases. One of the goals of this research is for the framework model to be general enough that the parameters can be varied such that it can serve as input for investigating other distributed applications that require the generation of user request access patterns.
文摘对移动通信终端进行侦察与管控是维护正常通信秩序和电磁空间安全的应有之义。通信系统的行为模式是其重要的特征之一,传统的仅限于信号参数获取的侦察方法无法对移动通信系统的行为模式进行精准分析。针对这一问题,以终端与基站交互过程中寻呼(Paging)信号与接入(Access)信号为突破口,充分利用该类信号特有的时频特征和明文传输特点,在对其进行有效截获的基础上,经过解调、解扰、解码得到其携带的信息比特。通过对信息比特实施解析,获得交互信令的含义,完成对移动通信终端行为模式的综合分析,揭示了寻呼与接入信号之间通信信息交互的时序逻辑关系,为信息对抗中的灵巧干扰提供了时间与信息字段上的侦察引导,是后续灵巧干扰的基础与前提。最后利用通信侦察接收机对第五代移动通信(5th Generation mobile communication,5G)信号进行实地侦收与分析,实验结果验证了所提方法的正确性与有效性,为移动通信终端的精准侦察与管控奠定了技术基础。
