Gateway device, base station, mobile management server, and communication method

摘要

A gateway device connects a base station to a core network. The gateway device has a communication unit that receives, from a mobile management server in the core network, a key that cancels ciphering that was set in an NAS message that was received from a terminal that is subordinate to the base station.

主权项

1. A gateway device that connects a base station to a core network, comprising:
a communication unit that receives from a mobile management server in said core network a key that cancels ciphering that was set in a Non Access Stratum message that was received from a terminal that is subordinate to said base station; a processing unit; and a memory unit that stores a correspondence table that indicates, for each said terminal, the necessity or lack thereof of offloading to a Packet Data Network according to a Access Point Name that is contained in a Packet Data Network connection request message transmitted as a Non Access Stratum message from that terminal; wherein: the Packet Data Network is connected to said core network; and said processing unit:
upon reception of a Non Access Stratum message from said terminal, uses the key to cancel ciphering that was set in the Non Access Stratum message that was received from said terminal; andwhen a Non Access Stratum message that was received from said terminal is a Packet Data Network connection request message, determines the route of a Packet Data Network connection based on the Access Point Name contained in the Packet Data Network connection request message and the necessity or lack thereof of offloading according to the Access Point Name that is indicated in said correspondence table.