Soft switch service communication method, device and system

The invention belongs to the technical field of communication, and relates to a soft switch service communication method, a device and a system, wherein the soft switch service communication method comprises the following steps: a first indoor base station sends a request message for starting soft switch service to a second indoor base station to establish a transmission channel for soft switch service; and soft switch service communication is conducted between the first indoor base station and the second indoor base station in the transmission channel for soft switch service so as to realize the soft switch service communication covered by the indoor base stations and expand the application of the indoor base stations.