| 摘要 |
The invention relates to system for authenticating a GPRS communication unit ( 231 ). A communication system comprises a GPRS sub-communication system ( 201 ) and a local network ( 203 ) such as an IEEE 802.11 Wireless Local Area Network (WLAN). The GPRS communication unit ( 231 ) is a dual-mode communication unit operable to communicated on both the local network ( 203 ) and the GPRS sub-communication system ( 201 ). The GPRS communication unit ( 231 ) attaches to an access point ( 225 ) of the local network using a local network protocol. The GPRS communication unit ( 231 ) is authenticated and attached to the GPRS sub-communication system ( 201 ) by communicating GPRS authentication messages between the GPRS communication unit ( 231 ) and a GPRS authentication element ( 215 ) through the access point ( 225 ) by encapsulation of GPRS authentication messages in local network authentication messages. Hence, authentication of a dual mode communication unit on a GPRS communication system is enabled in the context of a local network authentication process.
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