Through non reliance access network, the device and the method of doing single sign on certification

摘要

This invention, when access network does not offer data dispatch original certification, offers the communication device, the user equipment and the method of designating that single sign on certification is done as purpose. This invention proposes that the first access certification which was executed core network, namely, foam/home network or the user where the user has joined vis-a-vis the network of the place of visit which roaming has been done is reused. Therefore, the access certificate which is acquired the occasion where certification of the user for core network succeeds, on user equipment side, through access network it is linked to the secure tunnel which is established vis-a-vis service network. Also the access certificate which is received in the entity of service network, is linked to the secure tunnel. The both access certificates are linked by internal IP address, identify the user safely in service network.