Patent ID: 8867354
Filing Date: 2014-10-21
Classification: H04L,H04W

Abstract:
1. A transmission control method comprising: performing communication between a transmission source communication device and a transmission destination communication device by using a transmission control protocol which includes a plurality of different congestion control functions corresponding to a plurality of different congestion control methods, respectively, each of the congestion control methods being a variant of the transmission control protocol; causing, using a processor, when the transmission source communication device and the transmission destination communication device switch from a first congestion control function to a second congestion control function during the communication, at least one of a plurality of parameters for controlling operating states in the first congestion control function to be inherited by a parameter for controlling an operating state in the second congestion control function; detecting, with at least one of the transmission source communication device and the transmission destination communication device, communication quality; selecting, when a change in the communication quality is detected in the middle of a communication session, between the transmission source communication device and the transmission destination communication device, using the transmission control protocol for performing congestion control in accordance with the first congestion control function, the second congestion control function corresponding to at least one of a change of a delay of communication, a change of a bandwidth of communication, a change of a rate of discard of communication, and which data transfer type out of sporadic and bulk transfer the data transfer of the communication session is; transmitting and receiving the selection of the second congestion control function between the transmission source communication device and the transmission destination communication device; and switching from the first congestion control function to the second congestion control function at a synchronized timing between the transmission source communication device and the transmission destination communication device.