Patent ID: 8411619
Filing Date: 2013-04-02
Classification: H04L,H04W

Abstract:
1. A method of transmitting packets at a serving base station in case of a mobile station performing handover, the method comprising: receiving a series of packets from an upper layer entity; transmitting the series of packets sequentially to a target base station, wherein a packet of the series of packets includes a packet type field indicating a type of the series of packets and an information field which represents whether the packet is the last transmitted; receiving a reception status message regarding the series of packets from the target base station, the reception status message including a bitmap field and a starting sequence number field, the bitmap field indicating whether an error of the series of packets is detected in order from a last transmitted packet to a first transmitted packet, the starting sequence number field indicating a sequence number of a next packet to be transmitted by the serving base station; and retransmitting at least one error-detected packet to the target base station according to the reception status message.