Determining dependencies in multi technology inter domain wireless access; A case study

For critical services the availability of the wireless access is one of the fundamental QoS requirements. Availability can be used as one of the criteria in handover/multihoming decision. Assuming independency between different access networks will over estimate the availability. Dependencies will be retrieved by a detailed structure function including all equipment used. In this paper we address the feasibility to derive the structure function from the operations support systems (OSSs) for the access networks available at a given location, in a multi technology multi operator wireless access environment. A field trial is performed to derive the detailed structure function in a commercial network.