Multicast node apparatus, multicast transfer method and program
AssigneeNEC Corporation
InventorsKazuya Suzuki, Masahiro Jibiki
Life of this patent
Estimating the term…
Abstract
To provide an apparatus that optimizes the wait time in node apparatuses performing a packet backup using a multipath. The apparatus uses statistic information related to the transmission qualities of the paths constituting the multipath, thereby determining the minimum wait time that satisfies a target packet backup rate.
Claims42
1-25. (canceled)
A node apparatus, characterized in comprising:
- a network interface that makes a connection to a network existing outside the apparatus;
- a packet receiver for receiving a packet via said network interface;
- a statistics processing unit for collecting statistic information relating to said received packet;
- a wait time calculator for deciding a wait time of said packet based upon said collected statistic information.
A packet transfer method of sending out a received packet at a sending-out time, characterized in including the steps of:
- receiving a packet;
- collecting statistic information relating to said received packet;
- and
- computing a wait time of said packet based upon said collected statistic information.
A program for a packet transfer, said program causing a computer to execute the processes of:
- receiving a packet;
- collecting statistic information relating to a delay value from said received packet reception path by reception path;
- and
- computing a wait time of said packet based upon said collected statistic information.
A node apparatus having an application-level packet transfer function, characterized in comprising:
- a network interface that makes a connection to a network existing outside said node apparatus;
- a packet receiver for receiving a packet including timestamp information and sequence information attached at the time of sending out the packet via said network interface, making a reference to a table into which a correspondence of a pier, a transmission source, and destination information has been filed, specifying a corresponding upstream pier from the received packet based upon the transmission source and the destination information, and sending said received packet to a receiving buffer that corresponds to the specified upstream pier;
- a statistics processing unit for collecting at least one item of information of a mean of delays, a variance of delays, a frequency distribution of delays, and a packet loss rate of the received packets for each pier unit;
- a wait time calculator for computing a packet wait time based upon the information collected by said statistics processing unit;
- and
- a packet synchronizer for, by making a reference to a table for managing a correspondence of an upstream pier and a downstream pier, specifying a downstream pier, which corresponds to said specified upstream pier, from the packets received from a plurality of upstream paths and filed into said receiving buffer, and filing the packet into the transmitting buffer that corresponds to said specified downstream pier.
A communication system, characterized in comprising:
- a network:
- a network interface that makes a connection to said network;
- a packet receiver for receiving a packet via said network interface;
- a statistics processing unit for collecting statistic information relating to said received packet;
- and
- a wait time calculator for deciding a wait time of said packet based upon said collected statistic information.
Dependencies are inferred from the claim text.