SDN-controlled bandwidth sharing method for use with terminal small cell, and bandwidth sharing device

A software-defined network (SDN) controller, the SDN controller comprising at least one processor and a storage system that stores one or more programs which when executed by the at least one processor, causes the at least one processor to:

• determine whether a trigger request for bandwidth sharing is received, wherein the trigger request indicates a need of bandwidth sharing of a first terminal cell from other terminal cells when processing a target service on a backhaul link, and a bandwidth requirement of the target service equals to or exceeds a first predetermined threshold;
• select one or more second terminal cells to provide bandwidth sharing for the first terminal cell upon determining receipt of the trigger request;
• control the first terminal cell and the one or more second terminal cells to jointly process the target service, comprising:
• respectively configuring a routing policy for each of the first terminal cell and the second terminal cell;
• transmitting the routing policy of the first terminal cell and the second terminal cell to a base station that provides backhaul link to the first terminal cell and the second terminal cell, wherein the base station respectively forwards the routing policy of the first terminal cell and the second terminal cell to a corresponding terminal cell, so as to enable joint routing of service data of the target service to the base station based on the routing policy of the first terminal cell and the second terminal cell;
• configure a routing policy to a network side server for the base station;
• and
• send the routing policy to the network side server to the base station, so as to enable the base station to route the service data to the network side server according to the routing policy for the network side server;
• wherein the routing policy of the first terminal cell and the second terminal cell is configured in accordance with status information of the first terminal cell and the second terminal cell, path information between the first terminal cell and the second terminal cell, and path information between the first terminal cell or the second terminal cell and the base station, the status information of the first terminal cell and the second terminal cell comprising address information, energy consumption information, and available bandwidth information, the path information between the first terminal cell and the second terminal cell comprising path delay information and path cost information, the path information between the first terminal cell or the second terminal cell and the base station comprising path delay information and path cost information.