Patent ID: 9143458
Filing Date: 2015-09-22
Classification: H04L

Abstract:
1. A network device that relays a TCP communication through a first network and a second network between a first host and a second host, comprising: a first storage area that holds a request rate based on the amount of data input from the first network, and a first output rate indicative of an effective bandwidth for transferring data to the second network; a connection division coupling unit that divides, for the TCP connection between the first and second hosts, the data from the first network into a plurality of connections established with respect to a counter network device of the second network, and transfers the data, and couples the data through the plurality of connections from the second network, and transfers the data to the first network; and a second storage area that holds a second output rate for each of the divided connections, wherein the connection division coupling unit conducts a communication with the use of a connection other than a relatively low-speed connection among the plurality of connections of the second network, or with reducing a use rate of the relatively low-speed connection, when the request rate is larger than the first output rate by a predetermined threshold value or larger, and the relatively low-speed connection having the second output rate equal to or larger than a given speed is detected from the plurality of connections of the second network.