Queuing is possible for call setup and for handovers, for handovers between inter BSC cells, and the target cell is congested then the HO request can be queued, however this results in delayed HOs the other option is to have more than one candidates to be considered for inter BSC HOs, and if the first is congested the second candidate is considered for HO as a MSC controlled HO, which can result in HO to non best server.