The decision of call admission becomes an important work owing to the scarce wireless spectrum for wireless cellular networks.\r\nIf there exists adequate information for call admission control (CAC) schemes, the terms of quality of service (QoS), such as call\r\ndropping probability (CDP), call blocking probability (CBP), and system utilization, will be kept in a certain acceptable level.\r\nTherefore, a prediction system which can predict most information, such as system utilization and CDP, in advance with a novel\r\ndata mining technique and a distributed CAC scheme is presented in this paper. Based on the prediction results and the bandwidth\r\nconsumption of adjacent cells, the proposed CAC scheme is able to decide to admit a new call. The throttle flag that can indicate\r\nthe usage of current cell is proposed to prevent the newly admitted call request from being blocked in adjacent cells if handoff is\r\nneeded. The simulation results show that the proposed CAC scheme can maintain the CDP below a predefined threshold, and the\r\nCBP is also lower than the cluster prediction and traditional guard channel policies.
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