A method of simulating a Wireless Local Area Network (WLAN) in a combination of said Wireless Local Area Network (WLAN) and at least one mobile communication network, the method including the steps of: - providing a first set (AP_LLC, AP_802.1x, AP_802.11i, AP_EAP, APC_EAP, APC_EAP_SIM, APC_EAP_AKA, APCJTransport_IP, APC_Tunneling, APC_GA_RC, APC_GA_PSR, APC_GA_PSR_Manager) and a second set (AP_MAC, AP_MAC_Manager, AP_PHY, AP_SME) of access protocol simulation devices representative of WLAN network apparatus implementing access protocols, wherein: - said first set (AP_LLC, AP_802.1x, AP_802.11i, AP_EAP, APC_EAP, APC_EAP_SIM, APC_EAP_AKA, APC_Transport_IP, APC_Tunneling, APC_GA_RC, APC_GA_PSR, APC_GA_PSR_Manager) of access protocol simulation devices is representative of radio technology independent apparatus providing integration of said WLAN with said at least one mobile communication network and includes access protocol simulation devices at the LLC - Logical Link Control - level of said WLAN, and - said second set (AP_MAC, AP_MAC_Manager, AP_PHY, AP_SME) of access protocol simulation devices is representative of radio technology dependent apparatus present in said WLAN and includes access protocol simulation devices at the MAC - Media Access Control - level and PHY - PHYsical - level of the WLAN, and - simulating different types of WLAN technology in said WLAN by varying the access protocol simulation devices in said second set (AP_MAC, AP_MAC_Manager, AP_PHY, AP_SME) while maintaining the access protocol simulating devices in said first set (AP_LLC, AP_802.1x, AP_802.11i, AP_EAP, APC_EAP, APC_EAP_SIM, APC_EAP_AKA, APC_Transport_IP, APCJIunneli<'>ng, APC_GA_RC, APC_GA_PSR, APC_GA_PSR_Manager). - providing a first set (AP_LLC, AP_802.1x, AP_802.11i, AP_EAP, APC_EAP, APC_EAP_SIM, APC_EAP_AKA, APCJTransport_IP, APC_Tunneling, APC_GA_RC, APC_GA_PSR, APC_GA_PSR_Manager) and a second set (AP_MAC, AP_MAC_Manager, AP_PHY, AP_SME) of access protocol simulation devices representative of WLAN network apparatus implementing access protocols, wherein: - said first set (AP_LLC, AP_802.1x, AP_802.11i, AP_EAP, APC_EAP, APC_EAP_SIM, APC_EAP_AKA, APC_Transport_IP, APC_Tunneling, APC_GA_RC, APC_GA_PSR, APC_GA_PSR_Manager) of access protocol simulation devices is representative of radio technology independent apparatus providing integration of said WLAN with said at least one mobile communication network and includes access protocol simulation devices at the LLC - Logical Link Control - level of said WLAN, and - said second set (AP_MAC, AP_MAC_Manager, AP_PHY, AP_SME) of access protocol simulation devices is representative of radio technology dependent apparatus present in said WLAN and includes access protocol simulation devices at the MAC - Media Access Control - level and PHY - PHYsical - level of the WLAN, and - said first set (AP_LLC, AP_802.1x, AP_802.11i, AP_EAP, APC_EAP, APC_EAP_SIM, APC_EAP_AKA, APC_Transport_IP, APC_Tunneling, APC_GA_RC, APC_GA_PSR, APC_GA_PSR_Manager) of access protocol simulation devices is representative of radio technology independent apparatus providing integration of said WLAN with said at least one mobile communication network and includes access protocol simulation devices at the LLC - Logical Link Control - level of said WLAN, and - said second set (AP_MAC, AP_MAC_Manager, AP_PHY, AP_SME) of access protocol simulation devices is representative of radio technology dependent apparatus present in said WLAN and includes access protocol simulation devices at the MAC - Media Access Control - level and PHY - PHYsical - level of the WLAN, - simulating different types of WLAN technology in said WLAN by varying the access protocol simulation devices in said second set (AP_MAC, AP_MAC_Manager, AP_PHY, AP_SME) while maintaining the access protocol simulating devices in said first set (AP_LLC, AP_802.1x, AP_802.11i, AP_EAP, APC_EAP, APC_EAP_SIM, APC_EAP_AKA, APC_Transport_IP, APCJIunneli<'>ng, APC_GA_RC, APC_GA_PSR, APC_GA_PSR_Manager).