Method for supporting local offloading of business and base station sub-system

The invention discloses a method for supporting the local offloading of business. The method is applied to a base station sub-system which comprises a base station and a business local offloading module consisting of a business offloading transfer engine and a business offloading control module, wherein the business offloading control module controls the business offloading transfer engine and the packet data convergence protocol module of the base station to implement the method. The method comprises the steps that the PDCP module acquires a first data packet sent by a first user apparatus to which the service is provided by the base station, and when it is determined that the first user apparatus supports the local offloading business and the target address of the first data packet is a preconfigured network address for offloading to the local or located in the preconfigured network segment for offloading to the local, the first data packet is sent to the business offloading transfer engine; and the busines