Abstract: A handover method and apparatus in a communication system are provided. A serving Base Station (BS) alternately receives a target BS indicator and a downlink (DL) channel status from a Mobile Station (MS) at intervals of predetermined frames in a BS switching period for handover of the MS. The serving BS determines whether to continue the handover according to a signal received in a frame corresponding to a second reception of the target BS indicator. The method and apparatus provide a detailed definition of operation parameters for a switching time between the serving BS and a target BS.

Abstract: An apparatus and method for managing quality of service (QoS) of a service flow in a wireless communication system are provided. A method of operating a base station (BS) in a wireless communication system includes receiving QoS policy information of mobile stations (MSs) from a network entity including a policy decision function (PDF) or from neighbor BSs, and storing the QoS policy information; detecting a mobile station attempting connection re-establishment; upon detecting the mobile station attempting connection re-establishment, evaluating a QoS policy of the mobile station; and controlling a state of a service flow generated for the mobile station according to the QoS policy.

Abstract: An apparatus and method for managing quality of service (QoS) of a service flow in a wireless communication system are provided. A method of operating a base station (BS) in a wireless communication system includes receiving QoS policy information of mobile stations (MSs) from a network entity including a policy decision function (PDF) or from neighbor BSs, and storing the QoS policy information; detecting a mobile station attempting connection re-establishment; upon detecting the mobile station attempting connection re-establishment, evaluating a QoS policy of the mobile station; and controlling a state of a service flow generated for the mobile station according to the QoS policy.

Abstract: A handover method and apparatus in a communication system are provided. A serving Base Station (BS) alternately receives a target BS indicator and a downlink (DL) channel status from a Mobile Station (MS) at intervals of predetermined frames in a BS switching period for handover of the MS. The serving BS determines whether to continue the handover according to a signal received in a frame corresponding to a second reception of the target BS indicator. The method and apparatus provide a detailed definition of operation parameters for a switching time between the serving BS and a target BS.

Abstract: Digital focusing method and apparatus in an image processing system, for digitally focusing an out-of-focus image, are provided. A defocused image is divided into sub-images of a predetermined size. An edge direction of each of the divided sub-images is estimated. Step responses with respect to the respective edge directions are calculated. A mean step response is obtained by averaging a predetermined number of the step responses. Point Spread Function (PSF) coefficients are obtained using the mean step response. An image blur transfer function is obtained using the PSF coefficients. An image restoration transfer function is obtained using the image blur transfer function. An original in-focused image is obtained by multiplying the image restoration transfer function by the defocused image in a frequency domain. Thus, an image can be restored in real time, and the size and weight of the image processing system can be reduced.