Performance improvements of mobile data protocol in wire and wireless interworking environments

In this paper, efficient data transmission methods in wire and wireless interworking environments are studied in the case of handover occurring. In wire and wireless interworking equipment, handover adaptation methods as well as various transmission characteristics of the wire and wireless channel must be considered. To provide an efficient mobile data service based on TCP, the wire and wireless interworking module with an analysis function of the TCP segment header protects the duplicated transmission of the TCP frames. Also, by using the forwarding mechanism of status information and buffered data in the interworking module, it is possible to recover frame loss occurring in handover quickly. According to simulation results, the proposed method has better performance than the conventional method in view of throughput and delay. The reason is due to the fact that duplicated transmission is prevented and data recovery is performed very quickly because buffered data are forwarded without loss in the case of handover