Method for establishing a communication between a device and a host application over an IP network, a host application and DSL router, and embodiments of programs logical device said method.

摘要

Method for communication between a device (R1, R2) and a host application (A11, A12, A21, A22) in an IP network, wherein said device has no external IP address known, said method comprising the steps of: a. send a multidirectional discovery request by said host application to a specific multicast address and specific port known by one said device; b. responding said device to said discovery request with a response multidirectional discovery sent to said specific multicast address and specific port, said discovery response a unique identification parameter proper to said device and IP address of host computer and port number application, such as identified in said discovery request; c. accepting said host application such discovery response based endicha address host IP and port number of the application and send multicast messages to said specific multicast subsequent address and specific port and including said identification parameter; d. said device accepting messages based on subsequent multidirectional said identity parameter and send multicast messages to said specific multicast subsequent address and specific port and including said identification parameter and said IP address of host and port number of the application.