Abstract:

TCP Vegas is a reliable algorithm in the transport layer. In virtue of the data transmission restricted in wireless network bandwidth, it is not suitable for transmission in the wireless network. A TCP New Vegas algorithm which is applicable to heterogeneous networks is presented based on TCP Vegas algorithm. The algorithm controls the diff two dynamic threshold methods a, b. According to the two set a dynamic threshold method, it can effectively improve the algorithm of congestion window and throughput. The algorithm simulation experiment was carried out for background simulation of wireless sensor networks access to the third generation mobile communication network. The simulation results show that the improved TCP New Vegas algorithm has larger congestion window and higher throughput. It is more suitable for application in heterogeneous network data transmission.

Key words: heterogeneous networks, wireless sensor network, TD-SCDMA, TCP, TCP New Vegas