Patent ID: 8937924
Filing Date: 2015-01-20
Classification: H04W

Abstract:
1. A method in a core network communicatively connected with a first radio access network (RAN) comprising a first network element, and a second RAN comprising a second network element, comprising: receiving, by a mobility management node in the core network, a first Non Access Stratum (NAS) message via the second network element from a User Equipment (UE), wherein the UE has, with the first network element, at least one of a Local Internet Protocol (IP) Access (LIPA) packet data network (PDN) connection and a selected IP traffic offload (SIPTO) PDN connection; detecting, by the mobility management node, that the UE is connected to the second network element that is different from the first network element that has a first identifying characteristic, and wherein the detecting comprises determining that the first NAS message is received with a second identifying characteristic of the second network element different from the first identifying characteristic associated with the at least one of the LIPA PDN connection and the SIPTO PDN connection, the first identifying characteristic stored at the mobility management node; and in response to the determining that the first NAS message is received with the second identifying characteristic of the second network element different from the first identifying characteristic: