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US 8,913,499 B2Granted
Bandwidth monitoring method and its device
AssigneeHitachi, Ltd.
InventorsTakeki Yazaki, Takeshi Aimoto
Life of this patent
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AssigneeHitachi, Ltd.
InventorsTakeki Yazaki, Takeshi Aimoto
Estimating the term…
A bandwidth monitoring device for use in a network for transferring priority packets in preference to non priority packets as far as the amount of the priority packets is within a contract bandwidth established between a network user and a network operator, comprising a bandwidth check result decision unit for detecting whether the bandwidth of the priority packets is less than the contract bandwidth, and a DSCP decision unit for determining that a non priority packet may be transferred as a priority packet when the bandwidth of the priority packets is less than the contract bandwidth thereby to sufficiently use the contract bandwidth.
A packet transmission apparatus connected to a network where packets of specific type are transmitted in preference to packets other than the specific type of packets, comprising:
In a packet transmission apparatus transmitting to a network where packets of specific type are transmitted in preference to packets other than the specific type of packets, a bandwidth control method comprising the steps of:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Transfer mode dependent, e.g. ATM: bandwidth control in ATM Networks, e.g. leaky bucket
Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral,…:…
Resource management and allocation: monitoring or policing, e.g. compliance with allocated rate, corrective actions
Cell characteristics, e.g. loss, delay, jitter, sequence integrity: priority, marking, classes
Term ended 12 Jul 2020 (estimated)
1. Field of the Invention
The present invention relates to a bandwidth monitoring method for monitoring a bandwidth for each packet which flows into a network, and a bandwidth monitoring device therefor.
2. Description of the Related Art
FIG. 1 is a block diagram showing a configuration of a router according to the present invention;
FIG. 2 is a constitutional diagram of an Internet;
FIG. 3 is a diagram depicting a format of a packet employed in the network;
A summary of a router according to the present invention, which has a bandwidth monitoring function, will first be described using FIGS. 1, 3 and 4.
FIG. 1 shows a router 100 according to the present invention. The router 100 comprises an input line 101 to which packets are inputted, a packet receiving circuit 160 for performing processing to receive the packets, M buffers on receiving side 130-i (where i=1 to M), a buffer selector on receiving side 150 for distributing the packets to the buffers on receiving side 130-i, a header processing unit 140 for determining a DSCP indicative of priority in a network and an output line number as an identifier of a line for outputting the packet, a packet transmission circuit on receiving side 120 for reading out the packets from the buffers on receiving side 130-i, packet forwarding processing means 110 for switching the packets based on the output line number, M buffers on transmission side 131-i (where i=1 to M), a buffer selector on transmission side 151 for distributing the packets to the buffers on transmission side 131-i, a packet transmission circuit on transmission side 121 for reading out the packets from the buffers on transmission side 131-i, a packet transmission circuit 161 for performing processing to transmit the packets, and an output line 102 from which packets are outputted.
Although FIG. 1 shows a pair of the input line 101 and the output line 102, the router 100 actually has a plurality of input lines 101 and output lines 102.