Fujitsu Corporation

Tatsuya Shoho

Yasuhiko Uchida

Danasiri Wijedasa Dewagamage

Nobuo Sashida

Toshihiro Furudate

A transmission device includes: a calculation unit to detect abnormal traffic based on a traffic volume collected for the route and to calculate a traffic increase/decrease time and a traffic increase/decrease volume of the abnormal traffic; a normal prediction graph generation unit to generate a normal prediction graph based on the traffic volume in normal time in which the abnormal traffic is not detected; a prediction graph generation unit to generate an abnormal prediction graph based on the traffic increase/decrease time and the traffic increase/decrease volume of the abnormal traffic in detection of the abnormal traffic; an order determination unit to determine a line order that is a priority order of line allocation for the route based on the normal prediction graph or the abnormal prediction graph; and an optimization unit to determine lines that are to be allocated to the route based on the line order.

Transmission device, control card, and transmission method

In a communication network system that is capable of multipoint connection from one switch to a plurality of other switches, to provide an efficient method of rerouting connection in multipoint connection. There is provided a method of rerouting connection, if there is a first other switch that cannot receive multipoint connection request information from the one switch, the method comprising the steps of: receiving in a second other switch first multipoint connection request information sent from the one switch; generating in the second other switch second multipoint connection request information to the first other switch by using the first multipoint connection request information; sending the second multipoint connection request information generated in the second other switch to the first other switch; and performing prescribed multipoint connection processing in the first other switch by using the second multipoint connection request information sent from the second other switch.

Method of rerouting connection in multipoint connection

There is provided a re-connection method for a communication network system that enables a multipoint connection by which the same data is transmitted from a first subscriber accommodated in a first switch to a plurality of second subscriber accommodated in a second switch, the method comprising the steps of: transmitting the data by the second switch to at least one of the second subscribers connected with the second switch; re-transmission requesting by the second switch to the first switch for re-transmitting of the data to the at least one of the second subscribers; and re-connection requesting by the first switch to the second switch for re-connecting the at least one of the second subscribers which has not connected with the second switch.

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Yokohama, Japan

Tatsuya Shoho