Packet retransmission control apparatus and packet retransmission controlling method

摘要

The present invention provides a packet retransmission control technique in which the communication performance can be improved in a state that the load of a network is high. The packet retransmission control apparatus includes a priority determining section configured to set a packet kind to each of transmission packets to indicate a kind of the transmission packet, and determine a priority level based on the packet kind to indicate an transmission order of the transmission packets; a packet buffer comprising a plurality of queues respectively assigned with priority levels, and configure to store the transmission packet in one of the plurality of queues which is determined based on the priority level of the transmission packet; and an arbitrating section configured to output the transmission packets from one assigned with the highest priority level of the plurality of queues to a lower layer in order of higher priority level.

主权项

1. A packet retransmission control apparatus, comprising:
a priority determining section configured to set a packet kind to each of transmission packets, and to determine a priority level based on said packet kind; a packet buffer comprising a plurality of queues respectively assigned with priority levels, and configured to store a transmission packet of the transmission packets in one of said plurality of queues which is determined based on said priority level of the transmission packet; and an arbitrating section configured to output the transmission packets stored in said plurality of queues of said packet buffer to a lower layer in an order of a higher priority level, wherein said priority determining section determines the higher priority level for the transmission packet when a retransmission count of the transmission packet is more than in a case where the transmission packet includes said packet kind of a retransmission application packet, wherein the packet retransmission control apparatus receives a packet, which includes a packet before a retransmission control and generated on an upper network layer, encapsulates the packet, and outputs the encapsulated packet to each of a physical layer and a link layer, and wherein said arbitrating section aggregates a reception frequency for every said packet kind, and changes a reference frequency of each of said plurality of queues based on said reception frequency.