Communication apparatus and packet transfer method
AssigneeHitachi, Ltd.
InventorsYuji OISHI, Takashi ISOBE, Takeki YAZAKI
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Abstract
To efficiently retransmit discarded packets and to reduce discarded location storage capacity, it is provided a communication apparatus to be coupled to a network, the communication apparatus being configured to: transmit data to a correspondent communication apparatus coupled to the network; receive an acknowledgement transmitted from the correspondent communication apparatus; monitor whether or not a storage capacity shortage for storing discarded locations of transmitted data in the correspondent communication apparatus; and retransmit data by setting a retransmission priority for discarded locations in a case of the storage capacity shortage.
Claims15
A communication apparatus to be coupled to a network, the communication apparatus being configured to:
- transmit data to a correspondent communication apparatus coupled to the network;
- receive an acknowledgement transmitted from the correspondent communication apparatus;
- monitor whether or not a storage capacity shortage for storing discarded locations of transmitted data in the correspondent communication apparatus;
- and
- retransmit data by setting a retransmission priority for discarded locations in a case of the storage capacity shortage.
A packet transfer method for transferring packets between communication apparatus coupled to a network, the packet transfer method comprising steps of:
- receiving, by a first communication apparatus, an acknowledgement packet including information about a selective acknowledgement and information about an acknowledgement from a correspondent second communication apparatus via the network;
- storing, by the first communication apparatus, a location to be retransmitted determined from the received acknowledgement packet in a retransmission management table;
- detecting, by the first communication apparatus, a storage capacity shortage in the second communication apparatus for storing discarded locations of transmitted data from the received acknowledgement packet;
- setting, by the first communication apparatus, a priority for a discarded location including a packet to be retransmitted in a case where the storage capacity shortage is detected in the second communication apparatus;
- and
- controlling, by the first communication apparatus, a transmission order of discarded retransmission packets based on the set priority.
Dependencies are inferred from the claim text.