To provide a communication system for appropriately controlling TCP communication in accordance with link disconnection or new link connection in an ad hoc network for using a table drive type routing protocol to perform routing.
When a terminal 1 starts TCP communication, a transmission destination address and a transmission source port number are registered in a socket information management table, when a terminal 3 detects link disconnection, Metric of path information of a routing table is updated to BIG and an Update packet including the updated path information is broadcasted, and when a terminal 2 and the terminal 1 receive the Update packet, the Metric is updated to BIG. When the Metric becomes the BIG, the terminal 1 acquires the transmission destination address of the path information, refers to the socket information management table and freezes TCP communication using a transmission source port number corresponding to the acquired transmission destination address.
MAHDAD NOURI SHIRAZI
TANAKA SHINSUKE
NAT INST INF & COMM TECH
Toshio Morita
Yoshihei Nakamura
Yutaka Horii
Hisato Noda
Masayuki Sakai
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