ABSTRACT

In 4G networks, call admission control techniques have been proposed to provide Quality of Service (QoS) in a network by restricting the access to network resources. Power control is essential in call admission control in order to provide fair access to all users, improve battery lifetime and system performance. But the existing call admission control algorithms rarely consider the power controlling techniques in the handoff process for different traffic classes. In this paper, we propose to develop a power controlled call admission control scheme for handoff in the advanced wireless networks. The incoming call measures the initial interference on it and then the base station starts transmitting the packets to the new call. The new call is rejected when the interference reaches a threshold value. Whenever an existing call meets the power constraint, the transmit power is decremented based on the traffic class and incoming call obtains this information by monitoring the interference received on it. The convergence of the power control algorithm is checked and the power levels of all incoming calls are adjusted. From our simulation results we prove that this power control technique provides efficient handoff in the 4G networks by increasing the throughput and reducing the delay of the existing users.