Data forwarding method and device, master base station and slave base station

A data forwarding method, applied to a second master base station and comprising:

• receiving a handover request response message carrying first preset information sent by a first master base station, wherein the first preset information comprises:
• first identity identifications of all flows configured for the first master base station and data forwarding addresses corresponding to the first identity identifications, and second identity identifications of all flows configured for a first slave base station which is added and data forwarding addresses corresponding to the second identity identifications;
• and
• performing a data forwarding, according to the first identity identifications, the data forwarding addresses corresponding to the first identity identifications, the second identity identifications and the data forwarding addresses corresponding to the second identity identifications.

A data forwarding method, applied to a second slave base station and comprising:

• receiving a slave base station release request which is sent by a second master base station and carries second preset information, wherein the second preset information comprises:
• an identity identification of a flow, corresponding to a first identity identification and/or a second identity identification, of which a service data adaptation protocol (SDAP) layer is at the second slave base station, and a data forwarding address corresponding to the identity identification;
• performing a data forwarding according to the identity identification and the data forwarding address;
• wherein the first identity identification is an identity identification of a flow configured for a first master base station, and the second identity identification is an identity identification of a flow configured for a first slave base station which is added;
• the data forwarding address comprises a first tunnel address and/or a second tunnel address, the first tunnel address is configured to forward data to the first master base station, and the second tunnel address is configured to forward data to the first slave base station.