Patent ID: 9379853
Filing Date: 2016-06-28
CPC Classification: H04L

Claim Text:
1. A packet retransmission control device that performs a retransmission control for a packet inputted from an upper layer, said packet retransmission control device comprising: a flow table that indicates, with respect to each of flows, which are discriminated by a flow identifier, to which packets belong, retransmission management information for managing said retransmission control; and a processing determination unit configured to refer to said flow table to detemiine whether or not to apply said retransmission control to said packet, wherein said retransmission management information indicates a retransmission management parameter, which includes a packet retransmission count and a delay excess count, wherein said delay excess count includes a number of times that a round-trip delay time regarding a packet exceeds an allowable time, wherein said round-trip delay time includes a time from a transmission time of a packet to a reception time of an acknowledgement responding to said packet, wherein said processing determination unit, when receiving a packet from said upper layer, refers to said flow table to obtain said retransmission management parameter associated with a flow to which said received packet belongs, wherein, if said retransmission management parameter is equal to or less than a threshold value, said processing determination unit determines to apply said retransmission control to said received packet, and wherein, if said retransmission management parameter exceeds said threshold value, said processing determination unit stops application of said retransmission control to said received packet.