Patent ID: 8179874
Filing Date: 2012-05-15
Classification: H04W

Abstract:
1. An automatic tunnel configuration method using a router advertisement message in a mobile node, the method comprising: connecting and receiving a router advertisement message containing a tunnel end-point address option from a first access router of an internet protocol version 6 (IPv6) network; allocating an address from a second access router of an internet protocol version 4 (IPv4) network to which the mobile node connects by checking whether a currently connected network is the IPv4 network when the mobile node is handed over; automatically configuring a tunnel using the address allocated from the second access router of the IPv4 network, and an IPv4 address of the tunnel end-point address option as both end points when a moved network is the IPv4 network; and maintaining the connection with the previously connected IPv6 network using the configured tunnel; and communicating with a correspondent node (CN) via the configured tunnel using a mobile internet protocol version 6 (MIPv6).