Method and apparatus for providing call admission control

摘要

The invention concerns a method and a call server (12) for providing admission control of a call between a telephone (10a) of a first party associated with an access point (111) of a packet-based wireless local area network (= WLAN) (1) and a telephone (3b) of a second party. At least one notification message (302, 309) regarding the intended call is received at the call server (12) of the WLAN (1). A request (304) to reserve bandwidth for the call at the access point (111) is sent from the call server (12) to the telephone (10a) of the first party, and a corresponding bandwidth request (305) for the call is sent from the telephone (1 0a) of the first party to the access point (111). The bandwidth request (305) is processed at the access point (111) in dependence on the current traffic load of the WLAN (1). A response (306) to the bandwidth request (305) is sent from the access point (111) to the telephone (10a) of the first party. Then, a notification message (307) to notify the call server (12) about the result of the bandwidth reservation is transmitted from the telephone (10a) of the first party to the call server (12). Lastly, the call server (12) initiates the establishment (314) of a call between the telephone (10a) of the first party and the telephone (3b) of the second party if the requested bandwidth has been allocated to the call.