Relay node switching method, base station and communication system

The invention relates to the technical field of communication and provides a relay node switching method. The relay node switching method includes: a target base station receives a switching request sent by a source base station serving relay nodes; the target base station acquires first TNL (transport network layer) information from the source base station; and the target base station establishes connection with the relay nodes according to the first TNL information. The invention further provides the base station and a communication system. By the aid of the relay node switching method, the base station and the communication system, switching of the relay nodes from the source base station to the target base station can be achieved, so that connection among the relay nodes and the target base station is established.