| 摘要 |
A technology is disclosed in which a QoS path related to a mobile terminal is established via an aggregation domain. When the QoS path is modified in accompaniment to the movement of the mobile terminal, a crossover node present within the aggregation domain is discovered. According to the technology, when a new QoS path is established between a QNE (local terminal) 101 and a QNE (partner terminal) 501, a QNE 303 near a subnet 301 to which the QNE (local terminal) is connected after moving transmits a message towards the QNE (partner terminal). At this time, a message is transmitted to find a QNE present at a location at which QoS paths for aggregation before and after the movement of the QNE (local terminal)separate, between QNEs (a QNE 305 and a QNE 211) positioned on an edge of an aggregation domain 227. A QNE 209 recognizes that the QNE itself is the crossover node upon receiving the message. The QNE adds its own IP address to the message and transfers the message.
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