Communications relay device, a communication relay system, a communication relay method, and a communication relay program

摘要

In order to make it possible to perform a data relay process without using a buffer even when a destination is in a congested state, a relay apparatus for communication includes a packet input process unit for identifying a destination of an input packet and determining whether or not the input packet is a packet related to a communication whose delay time is restricted, a congestion monitor unit for monitoring a congestion situation of the destination, and a delay unit for delaying output timing of a packet input by a given amount of time and then re-inputting the packet to the packet input process unit. The packet input process unit detour-transfers the input packet to the delay unit when the input packet is a packet related to a communication whose delay time is not restricted and the destination is in a congested state.