Base station, network system, and communication method

A first base station for inter-base station coordination communication, comprising:

• a processor, a memory coupled to the processor, a first logical interface and a second logical interface for communicating with a second base station;
• wherein the processor is configured to:
• exchange a control plane packet with a second base station through the first logical interface for controlling an inter-base station coordination between the first and second base stations, wherein a protocol for exchanging the control plane packet with the second base station through the first logical interface comprises Internet Protocol (IP);
• and
• exchange a user plane packet with the second base station through the second logical interface for implementing an inter-base station coordination involving the first and second base stations, wherein a protocol for exchanging the user plane packet through the second logical interface comprises a rapid input/output (Rapid I/O) protocol or a common public radio interface (CPRI) protocol;
• and, wherein
• the inter-base station coordination comprises carrier aggregation (CA) or coordinated multi-point (CoMP), and the first base station further comprises an interface between the first base station and an element management system (EMS), wherein the processor is further configured to:
• receive an activate cell command sent by the EMS through the interface:
• activate a first cell according to the activate cell command;
• receive a cell state report message of a second cell sent by the second base station though first logical interface, wherein the cell state report message of the second cell indicates the second cell is activated;
• and
• perform the CA or the CoMP coordination service interaction with the second base station through the second logical interface.