Design And Implementation For TCP/SCTP Translation Layer With Dynamic Rules Table And Parallel Connection

With development of Internet, For example, a large number of high definition cinema sites and web pages online computer games appear, Internet users need higher quality of services. At present, web services mainly rely on TCP.However,based on single home,TCP is difficult to meet the requirements of large-scale real-time media and communications.SCTP,based on multi-homed and multi-flow,can greatly change this situation.But the SCTP-based applications are not fully universal yet,forming the current coexistence of TCP and SCTP situation.so how to use SCTP services and little or not change user applications,become an important research.So that become an important project,which can improve quality of web services.P.E.L. in Delaware University of America proposed TCP/SCTP translation shim layer in 2008 first time. Through the full analysis and research I found that program existing following defects. First, manually configured rule table lead to static configuration. Static configuration exist large defect,which is not real-time update rule table,so the shim layer not be opened real-time,and will not be able to take full advantage of SCTP.Second, using a single SCTP or TCP protocol.The shim layer decide to use TCP or SCTP with the results of inquiries of rules table. So this connecting form is blindness, and increases the transmission delay, and not to maximize the use of SCTP for data transmission.In view of the above two shortcomings, this paper presents the dynamic rules table configuration and parallel of TCP and SCTP connections. Direct (1), this paper proposed dynamic rule table configuration, does not require manual configuration of the information of rules table. The shim layer can configure the rule table by themselves, in accordance with TCP and SCTP connection state, in order to achieve real-time configuration. Direct (1), this paper proposed TCP and SCTP parallel connections forms, use TCP and SCTP connections, and the shim layer will select one of both protocol when transport data. If SCTP is establish a connection,directly used it transmission. If the TCP connection established, but SCTP not established and not timeout. Then shim layer query rules table and use TCP connection sending SCTP requests packets, according to the return of the data, decided to wait for the SCTP or TCP connection for data transfer.Finally, the research is concluded with future work and the suggestions are proposed.