Patent ID: 6999422
Filing Date: 2006-02-14
Classification: H04J,H04L

Abstract:
1. A communication device which controls transmission of packets, comprising: (a) a transmission testing means for performing a packet route evaluation test, comprising: test packet generating means for generating a plurality of test packets, one for each route reaching a given destination node, the plurality of test packets including one reference test packet, transmission time acquisition means for recording reference transmission time at which the reference test packet is transmitted, and measuring transmission times of the other test packets to be transmitted, relative to the reference transmission time, reception time acquisition means for recording reference reception time at which the reference test packet is received, and measuring reception times of the other received test packets, relative to the reference reception time, and transport time evaluation means for ranking the plurality of routes in the order of relative packet transport times thereof, by evaluating the difference between the relative transmission time and the relative reception time of each test packet; and (b) packet transmission means for transmitting packets to one of the routes that is selected according to the result or the packet route evaluation test performed by said transmission testing means.