Patent ID: 9094876
Filing Date: 2015-07-28
Classification: H04L,H04W

Abstract:
1. A data delivery method of sending data and a sequence number corresponding to the data from a base station to a mobile station, and performing in-sequence delivery of the data received by the mobile station based on the sequence number comprising: differentiating, at a source base station, a sequence number of data that is transmitted to the mobile station from the source base station from a sequence number of data that is not transmitted to the mobile station from the source base station, but transferred to a target base station from the source base station, and transferring the data that is not transmitted to the mobile station from the source base station and the sequence number of the data to the target base station from the source base station via a user plane; adding, at the target base station, the sequence number received from the source base station to the data received from the source base station and transmitting the data to which the sequence number is added to the mobile station from the target base station; and at the mobile station, performing in-sequence delivery of the data received from the source base station and the data which is received from the target base station based on the sequence number.