Method and a device of authentication in the converged wireless network

A method of authenticating a User Equipment (UE) in a wireless access device, the UE accessing the wireless access device via a first wireless access network and a second wireless access network, the method comprising:

• maintaining a cipher key of the UE for accessing the first wireless access network;
• sending an access request for accessing the second wireless access network to the wireless access device, the access request including a network identification and a UE identification of the UE in the first wireless access network, the network identification being a network identification of the first wireless access network accessed by the UE;
• receiving an authentication message from the wireless access device;
• and
• sending an encrypted authentication message to the wireless access device, the encrypted authentication message having been encrypted by the UE using the cipher key associated with the UE, the cipher key having been previously used by the UE to access the first wireless access network, the wireless access device authenticating the UE based on the sent encrypted authentication message, if the UE has accessed the first wireless access network as determined based on the network identification and the UE identification, the wireless access device integrating the access functions of the first wireless access network and the second wireless access network to facilitate access for the UE to both the first wireless access network and the second wireless access network.

A wireless access device, the wireless access device comprising:

• a processor configured to,
• maintain cipher keys of multiple User Equipments (UEs) for accessing a first wireless access network,
• receive an access request for accessing a second wireless access network from a UE,
• extract a network identification and a UE identification of the UE from the access request, the network identification being a network identification of the first wireless access network accessed by the UE,
• send an authentication message to the UE,
• receive an encrypted authentication message from the UE, the encrypted authentication message having been encrypted by the UE using a cipher key associated with the UE, the cipher key having been previously used by the UE to access the first wireless access network,
• determine, based on the extracted network identification and the UE identification, if the UE has accessed the first wireless access network via the wireless access device, and
• authenticate the UE based on the received encrypted authentication message, if the UE has accessed the first wireless access network, the wireless access device integrating the access functions of the first wireless access network and the second wireless access network to facilitate access for the UE to both the first wireless access network and the second wireless access network.

A User Equipment (UE) accessing a wireless access device via a first wireless access network and a second wireless access network, the UE comprising:

• a processor configured to,
• maintain a cipher key of the UE for accessing the first wireless access network,
• send an access request for accessing the second wireless access network to the wireless access device, the access request including a network identification and a UE identification of the UE in the first wireless access network, the network identification being a network identification of the first wireless access network accessed by the UE,
• receive an authentication message from the wireless access device, and
• send an encrypted authentication message to the wireless access device, the encrypted authentication message having been encrypted by the UE using the cipher key associated with the UE, the cipher key having been previously used by the UE to access the first wireless access network, the wireless access device authenticating the UE based on the sent encrypted authentication message, if the UE has accessed the first wireless access network as determined based on the network identification and the UE identification, the wireless access device integrating the access functions of the first wireless access network and the second wireless access network to facilitate access for the UE to both the first wireless access network and the second wireless access network.