Nippon Telegraph and Telephone Corporation

Takamichi Kikkawa

Hiroshi Osawa

Masayuki Nishiki

Satoshi Nishiyama

A counter router () assigns predetermined information specifying a terminal () and a sequence number according to the predetermined information to a packet which is received and destined for the terminal (). Further, the counter router () transfers the packet to which the predetermined information and the sequence number are assigned, to a subscriber accommodation router () via a relay device. Further, the subscriber accommodation router () stores, in an aggregation server (), the predetermined information and the sequence number which are assigned to the packet transferred from the counter router ().

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Musashino, Japan

Takamichi Kikkawa