Patent ID: 7953076

Claim:
An IPv4/IPv6 combination network system, the system comprising: a dual stack transition mechanism (DSTM) server configured to recognize whether each host connected to an IPv6 network supports a resource reservation protocol (RSVP) while allocating IPv4 address information to the hosts according to a DSTM, and to notify a node exchanging packets according to the RSVP that the each host supports the RSVP in response to receipt of a request from the node, wherein the node is configured to determine, through the DSTM server, whether a receiving host supports the RSVP, in response to receipt of a reservation message according to the RSVP from a transmitting host, and to simultaneously establish an end-to-end session with the receiving host and a tunnel session with the transmitting host mapped to the end-to-end session in response to a determination that the receiving host supports the RSVP.