Base station shunting method for expanding coverage range of shared flow of home base station

The invention is suitable for the technical field of communication transmission, and provides a base station shunting method for expanding the coverage area of shared flow of a home base station, which comprises the following steps: when at least one adjacent station user accesses, when a data channel is established with a core network, if a data service bearer is established, establishing a data shunting channel for a master station through an XN link, an XN-U DATA DISTRIBUTE REQUEST message is newly added, and a master station receives a downlink user data channel establishment shunting request of an adjacent station and notifies a protocol stack user plane entity to establish a downlink data channel; afterwards, the master station responds to the uplink data flow identification of the adjacent station, an XN-U DATA DISTRIBUTE RESPONSE message is newly added, and the adjacent station receives the uplink data flow channel establishment shunting identification response of the master station and informs a prot