Intercell movement in small cell improvement scenario

摘要

A radio communication system comprising: a first base station (1) configured to operate a first cell (10); a second base station (2) configured to operate a second cell (20); a central network (5) comprising a mobility management apparatus (6) and a data transfer apparatus (7); and a mobile station (4), wherein the first base station (1) is configured to establish a first signaling bearer with the mobility management apparatus (6), establishing a second signaling bearer with the second base station ( 2), and establishing a signaling radio bearer with the mobile station (4) in the first cell (10), the second base station (2) is configured to establish the second signaling bearer with the first base station (1), establishing a data carrier with the data transfer apparatus (7), and establishing a data radio carrier with the mobile station (4) in the second cell (20), the first base station (1) is further configured to send , to the second base station (2) by means of the second signaling bearer, first configuration information that is necessary to establish the data bearer and the radio data bearer in the second base station (2), and the first base station (1) is further configured to retain the first configuration information in the first base station (1) even after the data bearer and the radio data carrier are established in the second base station (2), the first configuration information comprises at least one of an identifier of the data carrier, QoS information of the data carrier, an address of the data transfer apparatus (7), and a tunnel endpoint identifier of the apparatus (7) of data transfer, the first base station (1) is configured for, when a end point of the data radio bearer and a data carrier end point are changed from the second base station (2) to a third base station (3) , sending the first configuration information, which has been retained in the first base station (1), to the third base station (3), and the first base station (1) is configured for, when the point f The data carrier and the end point of the data carrier are changed from the second base station (2) to the third base station (3), generating, based on the first configuration information, third configuration information to establish the data radio bearer between the mobile station (4) and the third base station (3) and transmitting the third configuration information to the mobile station (4) by means of the signaling radio bearer.