There are two new trends in today's computer technology that are attracting more and more attention. Oneis multimedia service,especially the video service. The other is mobile wireless computing. The former can be implemented efficiently on the traditional wired network,such as the accession of multimedia information,real-time broad-cast. But due to the limitation of the wireless environment,the latter hasn't been able to support the video transport efficiently. Obviously,the combination of these two technologies,video service over wireless network,may be a killer application and in turn advances both of them. This paper summarizes the challenges of this field and introduces some possible solutions.
This paper discusses the role of Web caching, analyses some major topics in Web caching research, such asWeb cache's architectures,design techniques,deployment policies and,inter-caohe communication protocols for dis-tributed cache servers ,and multimedia proxy caching systems. Besides, some open problems in this field are also pre-sented.
It is distributed object technology that combined by network and object oriented technology in 90's last century, and it is difficult to extend across Internet. Contributed by HTTP and XML, Web service is becoming the component called through the Web. In this article, we describe and analyze some current distributed object technologies,and then introduce the emerging Web Service technology. We introduce and analyze the two software strategies: Microsoft . NET and Sun ONE. Web Services will transform the current isolated Internet Web into interconnected services.
