The specific node identifier of domain wide and the specific service identifier of domain wide using path choice system LSA, MPLS (Multi Protocol Label Switching) it is transmitted with domain. The node with respect to MPLS network calculating the tree of short route concerning the respective destination, configurates uni- cast transfer state on the basis of the tree which was calculated. In addition, as for the node, joint of the multi cast between the nodes which announce the common interest in the common service identifier is configurated. It is not to transmit the label which is used pertaining to the joint of the uni- cast and the multi cast, the node calculates the label decide. There are times when context of the label of optional number is calculated. The label every specific uni- cast path of domain wide or is every multi cast, or locally is specific and there are times when it is calculated in order to offer the context of transfer of the path which it is related decide.
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