A heterogeneous network comprising: one or more macro cells , wherein each macro cell is configured to wirelessly communicate with a mobile device in accordance with a first air interface standard; and one or more small cells , wherein each small cell is configured to wirelessly communicate with the mobile device in accordance with the first air interface standard and a second air interface standard, wherein a geographic range of the first air interface standard is longer than a geographic range of the second air interface standard; wherein the one or more small cells includes a home agent node and a foreign agent node for the first air interface standard and a home agent node and a foreign agent node for the second air interface standard, wherein the home agent node for the first air interface standard and the home agent node for the second air interface standard are associated with different network addresses, wherein the mobile device has a home address irrespective of its current location and a care-of address associated with its current location, wherein the home agent nodes are configured to store information about the mobile devices's home address, and wherein the foreign agent nodes are configured to store the care-of address of the mobile device; wherein communications initiated in accordance with the first air interface standard utilize a communication channel between the home agent node for the first air interface standard and the foreign agent node for the first air interface standard; and wherein the one or more small cells are configured to conduct intra cell handovers through a communication tunnel between the home agent node for the first interface standard and the foreign agent node for the second air interface standard. one or more macro cells , wherein each macro cell is configured to wirelessly communicate with a mobile device in accordance with a first air interface standard; and one or more small cells , wherein each small cell is configured to wirelessly communicate with the mobile device in accordance with the first air interface standard and a second air interface standard, wherein a geographic range of the first air interface standard is longer than a geographic range of the second air interface standard; wherein the one or more small cells includes a home agent node and a foreign agent node for the first air interface standard and a home agent node and a foreign agent node for the second air interface standard, wherein the home agent node for the first air interface standard and the home agent node for the second air interface standard are associated with different network addresses, wherein the mobile device has a home address irrespective of its current location and a care-of address associated with its current location, wherein the home agent nodes are configured to store information about the mobile devices's home address, and wherein the foreign agent nodes are configured to store the care-of address of the mobile device; wherein communications initiated in accordance with the first air interface standard utilize a communication channel between the home agent node for the first air interface standard and the foreign agent node for the first air interface standard; and wherein the one or more small cells are configured to conduct intra cell handovers through a communication tunnel between the home agent node for the first interface standard and the foreign agent node for the second air interface standard. <EOS>