| 摘要 |
A method for controlling access to a communication network such as a Wi-Fi network includes a user device (1) transmitting a network access request including an access token in at least one field of an authentication exchange. An access control server (4) determines a network access credit corresponding to the token, and allows access by the user device (1) to the network in real time to the extent of the credit. The authentication fields may be username and password fields under the RADIUS protocol. A network access server (2) processes the authentication field without recognising that it contains a token. It passes the network access request to a RADIUS authentication server (3), which in turn routes it to the access control server (4) again without recognising that the authentication fields include tokens. The invention therefore achieves real time network access without need for modification of network access servers or authentication servers.
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