Patent ID: 8782278
Filing Date: 2014-07-15
Classification: H04L,H04W

Abstract:
1. A method, comprising: retrieving a previously registered Internet Protocol (IP) address corresponding to a node from an Authentication, Accounting, and Authorization/Home Subscriber Server (AAA/HSS), the previously registered IP address associated with a first function, wherein more than two IP addresses are associated with the node; retrieving a user plane IP address of a Packet Data Network Gateway (PDN GW) from the AAA/HSS at a Mobility Management Entity (MME); selecting a prefix from a set of prefixes, wherein each prefix in the set of prefixes corresponds to a different function supported by the node, and wherein the selected prefix corresponds to a second function supported by the node; performing a reverse query of a Domain Name Server (DNS) formed as a function of the user plane IP address by the MME, the reverse query constructed based upon the previously registered IP address for the node; receiving a name from the DNS in response to the reverse query; performing a forward query of the DNS, the forward query constructed based upon the selected prefix and the name; receiving a disparate IP address for the node in response to the forward query of the DNS, the disparate IP address associated with the second function; receiving a control plane IP address for the PDN GW in response to the forward query of the DNS at the MME; initializing a General Packet Radio Service (GPRS) Tunneling Protocol (GTP) bearer using the control plane IP address; and switching between different types of access, based on at least one of the first function and the second function, using the previously registered IP address and the disparate IP address.