METHOD FOR TRANSFERRING A COMMUNICATION INVOLVING A MOBILE NODE CAPABLE OF MACRO MOBILITY WITHIN AN IP COMMUNICATIONS NETWORK HAVING HIERARCHICAL ROUTING

摘要

The invention relates to a communication transfer method for an IP network having hierarchical routing, comprising first (P1) and second mobility anchor points respectively connected to first (R1) and second (R2) access routers and to a home agent (EA) of a first mobile node (T1) communicating with a second node (T2). The inventive method consists, in the event the second access router (R2) is detected by the first mobile node (T1), of: i) determining the address prefix of the second access router (R2) for communicating it to the first mobile node (T1) so that it constitutes additional local and regional temporary addresses; ii) communicating the local additional temporary address to the first anchor point (P1) so that it establishes a provisional tunnel (TU) with the second access router (R2) for transmitting, to the second access router (R2), the packets intended for the first mobile node (T1); iii) connecting the first mobile node (T1) to the second access router (R2) for transmitting to it the packets received via the provisionary tunnel (TU), and; iv) communicating, to the second anchor point (P2) and to the home agent device (EA), the additional local and regional temporary addresses of the first mobile node (T1) so that it substitutes them for previous ones.