Transfer of security association during a mobile terminal...

Details Transfer of security association during a mobile terminal... Transfer of security association during a mobile terminal...

H - Electricity

04

W

H04W 12/06 (2009.01) H04W 12/04 (2009.01) H04W 84/12 (2009.01)

Patent

CA 2391996

An existing security association is re-established when a communication handover event occurs in a radio communications system such as IEEE 082.11 or a HIPERLAN wherein the existing security association between a mobile terminal and a wireless communication network is maintained when the communication handover occurs within the network. Authentication during a handover event is achieved by a challenge/response procedure. In accordance with the challenge/response procedure each member of a communication pair that is made up of a new access point and the mobile terminal that is experiencing a handover to the new access point sends a challenge to the other member of the communication pair. Each member of the communication pair then calculates a response to its received challenge, and these responses are sent back to the other member of the communication pair. Each member of the communication pair then compares its received response to a correct response. When these comparisons are correct, payload communication begins between the second access point and the mobile terminal.

Une association de sécurité existante est ré-établie lorsqu'un événement de transfert intercellulaire de communication se produit dans un système de communications radio tel que IEEE 082.11 ou un réseau de zone locale radio à haute performance (HIPERLAN), l'association de sécurité existante entre un terminal mobile et un réseau de communication sans fil étant maintenue lorsque le transfert intercellulaire de communication se produit à l'intérieur du réseau. L'authentification pendant un événement de transfert est réalisée par une procédure de demande d'accès/réponse. Selon ladite procédure, chaque élément de deux communications qui est constitué d'un nouveau point d'accès et du terminal mobile expérimentant un transfert intercellulaire vers le nouveau point d'accès envoie une demande d'accès à l'autre élément des deux communications. Chaque élément des deux communications calcule alors une réponse à sa demande d'accès reçue et ces réponses sont renvoyées à l'autre élément des deux communications. Chaque élément des deux communications compare ensuite sa réponse reçue par rapport à une réponse correcte. Lorsque ces comparaisons sont correctes, une communication de charge utile commence entre le second point d'accès et le terminal mobile.

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