METHOD OF ROUTING FOR INTERWORKING BETWEEN LOCAL NETWORK AND GLOBAL NETWORK BASED ON SESSION INITIATION PROTOCOL, ALG DEVICE AND NAT DEVICE THEREOF

摘要

invention private and public network interworking between SIP-based routing of SIP messages for method, it is applied Applications Layer Gateway is an apparatus and a network address translation device. ; According to the present invention, SIP message routing method of a private network and a public network, SIP (Session Initiation Protocol) based on the node that interlock (node) is (a) confirming a message transfer network and message type of the received SIP message, (b) the address information of the media receiving the SIP message is converted by the network address conversion unit on the basis of the confirming message transfer network and SIP message type applying to the message, (c) confirming the message transfer network routes the SIP message to the address of the selected node based on the path - where routing path determines the routing path of the next request message comprising the steps of specifying the information, and ( d) comprises the step of routing the SIP message to the destination address.