OPERATING METHOD AND TERMINAL APPARATUS OF TCP WELL ADAPTING TO VERTICAL HAND-OFF IN HETEROGENEOUS WIRELESS NETWORK WITH CONGESTION CONTROL

摘要

A congestion control terminal device of a vertical hand-off and an operating method in heterogeneous mobile network are provided to improve the efficiency of a system due to transmitting data by being quickly adapted to wireless environment. A congestion control terminal device of the vertical hand-off in heterogeneous mobile network includes 3G radio part, a WLAN radio part, a TCP part(160), a controller. The TCP part records SRTT, RTTvar and CWND parameter value. An administration module(163) provides in order to set up the CWND parameter value with the predetermined one-stage upturn. A variable setting module(164) is provided a variable which is finally recorded in a system.