Aiming at the handover authentication in the LTE-A

SDN is introduced and a new heterogeneous network framework named Software Defined LTE-A is proposed.This framework simplifies the handover authentication via the sharing of security context information in the Controllers.The use of Controller leads to one more communication overhead when the base station communicates to the core network.The standard handover authentication in LTE-A is a complex system that will generate a lot of communication overhead.The handover authentication based on proxy signature make the UE(User Equipment) need not to communicate to core network when UE is authenticated

which reduces the communication overhead.Compared to RSA Cryptography

the Elliptic Curve Cryptography needs less computation that will decrease the computation overhead in the Controller.Adopted the proxy signature based on the Elliptic Curve

a new handover authentication protocol is proposed

and is modeled

simulated

and analyzed by the Colored Petri Nets.The results of the simulation show that the proposed handover authentication is efficient and more secure.