Packet transmission method and communication system
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United States of America Patent
Stats
-
Mar 25, 2008
Grant Date -
Dec 4, 2003
app pub date -
May 27, 2003
filing date -
May 28, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The object is to prevent occurrence of packet loss in Cellular IP and a drop of TCP throughput due to duplication of packets. On the occasion of relaying a packet from correspondent, a relay router multicasts a router advertisement to access routers forming respective cells into which a target mobile terminal might move. The mobile terminal receives the router advertisements from the neighbor access routers, calculates a difference between reception times of the packets from the respective access routers, and specifies a relay router to perform multicasting. Then the mobile terminal transmits delay information of a delay to be added to each path in multicasting by the relay router, to the relay router thus specified. The relay router adds the delay to each path in multicasting on the basis of the delay information.
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