Patent ID: 7940726

Claim:
A method to operate an inter-network access (IAN) topology apparatus, comprising: automatically building a topology map based on an IAN session transfer of a wireless terminal, wherein the IAN session transfer occurs when the wireless terminal transitions from accessing a first cell belonging to a first access network to accessing a second cell belonging to a second access network, wherein the first and second access networks are different access networks, wherein the topology map includes one or more entries, each entry providing mapping information related to a transition from a source cell belonging to a source network to a target cell belonging to a target network, the source and target access networks being different access networks, wherein at least one entry of the topology map includes source cell parameters, target cell parameters, and a transfer indicator parameter, wherein each of the source and the target cell parameters of each topology map entry include a cell technology parameter, a cell identifier parameter, and an access network identity parameter, and wherein the step of building the topology map comprises: receiving IAN session transfer information of the wireless terminal, the IAN session transfer information including first cell parameters, second cell parameters, and a transfer result parameter; and updating the topology map such that source cell parameters, target cell parameters, and the transfer indicator parameter of the entry are correspondingly updated based on the first cell parameters, the second cell parameters, and the transfer result parameter.