However, as the network architecture and service value chain of 3G have changed tremendously, current billing systems are unable to satisfy content-based billing requirements.

In this paper,a content-based billing system is founded on next generation network,adds content service gateways CSG by the physical way,traces and checks carefully user data packets,and delivers user content information to the charging center to further process in terms of user needs.

So we introduce the concept of content-based billing to adapt to the varied applications of the telecom operators provided,help the telecom operators to exploit new appl.

Upon analysis of the inadequacy for existing charging mode,the demands and development of content-based charging and the related standards are described.

Content-based Charging is a novel charging method which charges the digital information products on the network based on their content, in order to differentiate the content value.

And it introduces the necessity of building a content-based charging plane for carriers.

For this reason,it presents a content prepaid charging approach for IGGSN based on CAMEL3 in this paper.

Against large-scale and valley-type phosphogypsum stack,design process is put forward and the design content is divided into 5 sectors,with their relationship and design items are discussed.

On the basis of studying the urban road network and analyzing the traffic issues,the article puts forward the necessity to compile the traffic organization design of urban roads,and discusses the design contents and design methods.