Patent ID: 7924745

Claim:
A communication method in a network system where a mobile communication node sends and receives a packet to and from another communication node through an access router which the mobile communication node is associated to, comprising the steps of: transmitting the packet directly between the mobile communication node and the access router when a link layer connection is established between the mobile communication node and the access router; and transmitting the packet between the mobile communication node and the access router through multiple-hop in a mobile ad-hoc network fashion when the link layer connection is not established between the mobile communication node and the access router, and the communication method further comprising the steps of: setting a hierarchical mode state inside the mobile communication node when the link layer connection is established, the hierarchical mode state indicating that the link layer connection is established; and setting a mesh mode state inside the mobile communication node when the link layer connection is not established, the mesh mode state indicating that the link layer connection is not established.