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US 2003/0112753 A1Published application
Router, terminal apparatus, communication system and routing method
AssigneeNtt Docomo, Inc.
InventorsManhee Jo, Yasuhisa Hayashi, Takatoshi Okagawa, Takeshi Ihara
Life of this patent
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Abstract
A router includes a clock configured to be synchronous to a transmission terminal that transmits a data packet; a comparator configured to compare a delay time of the data packet with an acceptable delay time of the data packet based on the time obtained from the clock; and a packet processing unit configured to either transfer or discard the data packet based on the comparison result of the comparator.
Claims20
A router, comprising:
- a clock configured to be synchronous to a transmission terminal that transmits a data packet;
- a comparator configured to compare a delay time of the data packet with an acceptable delay time of the data packet based on the time obtained from the clock;
- and
- a packet processing unit configured to either transfer or discard the data packet based on the comparison result of the comparator.
1 more element
A terminal apparatus, comprising:
- a transmitter configured to transmit a data packet;
- a clock configured to be synchronous to a plurality of routers, which transfer the data packet transmitted by the transmitter
- a control information recording unit configured to record a source departure time that the transmitter transmits the data packet in the data packet itself based on the time obtained from the clock.
A communication system, comprising:
- a transmission terminal configured to transmit a data packet;
- and
- a router that comprises a clock configured to be synchronous to the transmission terminal and a comparator configured to compare the delay time of the data packet with an acceptable delay time of the data packet based on the time obtained from the clock and a packet processing unit configured to either transfer or discard the data packet based on the comparison result of the comparator.
A routing method, comprising:
- obtaining, by a router, a time from a clock that is synchronous to a transmission terminal that transmits a data packet,
- comparing, by the router, the delay time of the data packet with the acceptable delay time of the data packet based on the obtained time, and
- either transferring or discarding, by the router, the data packet based on the comparison result.
Dependencies are inferred from the claim text.