| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a movable body communication system which can set the shortest LSP having compensated QoS with the other party of communication in the case that a terminal device has shifted between sub networks. SOLUTION: In this movable body communication system, in the case that, for example, MN 1 shifts to an external sub network while it is communicating a message making use of a CN 3 stored in other sub network and an existing LSP, the MN 1 requests the recomputation of LSP from AR 5 at the destination of shifting after extension of an existing LSP to the destination of shifting of MN 1, the AR 5 at the destination of shifting requested for recomputation inquires of the home network of MN 1 about the QoS information of MN 1, and HA 2 on the home network informs it of the desired QoS information. By the instruction of AR 5 at the destination of shifting having received the desired QoS information, LSR 8 connected to the AR 5 sets a new LSP having guaranteed QoS between itself and LSR 9 on the side of CN 3.</p> |
