Patent ID: 8654736

Claim:
A base station for use in a communication system including an access gateway, a radio access network and a user apparatus, the base station constituting the radio access network, the base station comprising: a transmission buffer configured to store a service data unit received from the access gateway; a retransmission buffer configured to store a packet data unit to be retransmitted in a radio downlink; a scheduler configured to determine assignment of radio resources to user apparatuses and supply scheduling information; and a transmitted signal processing unit configured to generate a transmitted signal including data stored in the transmission buffer or the retransmission buffer in accordance with the scheduling information, wherein the scheduler is configured to determine the scheduling information to transmit data destined for a user apparatus requesting handover in priority to data destined for a user apparatus that does not request handover, wherein the scheduling information is determined to transmit a packet data unit contributing to completion of a larger number of service data units among one or more packet data units required in a scheduled user apparatus to complete an incomplete service data unit in priority to the other packet data units destined for the scheduled user apparatus, wherein the packet data unit to be included in the transmitted signal is determined in accordance with respective data sizes of the service data unit and the packet data unit and data boundary position between the service data unit and the packet data unit, and wherein segmentation is prevented for a service data unit destined for the user apparatus requesting handover, the segmentation being for segmenting a service data unit and inserting the segmented service data unit in multiple packet data units.