A first network device, comprising: • an obtaining module, configured to obtain, according to channel state information, a backhaul request of a second network device, and residual backhaul capability information of a third network device, backhaul control information used for controlling the second network device and the third network device to backhaul data, wherein the backhaul control information comprises backhaul network topology control information and physical resource allocation information, wherein the backhaul request comprises at least one of the following: a total data volume of a service that needs to be backhauled, an allowed transmission delay, a priority of a to-be-backhauled service, a minimum rate that needs to be supported by the to-be-backhauled service, or source/destination network information of the to-be-backhauled service, wherein the residual backhaul capability information comprises at least one of the following: a backhaul capability margin, a delay experienced during backhaul, a buffer area size, a backhaul charging method, a type of a network in which backhaul arrives, or a backhaul link reliability index; and • a broadcast module, configured to broadcast the backhaul control information to the second network device and the third network device, so that the second network device and the third network device backhaul data according to the backhaul control information, characterized in that the first network device further comprises: • a first broadcast module, configured to broadcast a reference signal instruction message to the second network device and the third network device, wherein the reference signal instruction message is used to instruct one of the second and third network elements to send a reference signal on a resource indicated by the reference signal instruction message and the other of the second and third network elements that does not need to send the reference signal to measure the channel state information of the reference signal on the resource indicated by the reference signal instruction message. • an obtaining module, configured to obtain, according to channel state information, a backhaul request of a second network device, and residual backhaul capability information of a third network device, backhaul control information used for controlling the second network device and the third network device to backhaul data, wherein the backhaul control information comprises backhaul network topology control information and physical resource allocation information, wherein the backhaul request comprises at least one of the following: a total data volume of a service that needs to be backhauled, an allowed transmission delay, a priority of a to-be-backhauled service, a minimum rate that needs to be supported by the to-be-backhauled service, or source/destination network information of the to-be-backhauled service, wherein the residual backhaul capability information comprises at least one of the following: a backhaul capability margin, a delay experienced during backhaul, a buffer area size, a backhaul charging method, a type of a network in which backhaul arrives, or a backhaul link reliability index; and • a broadcast module, configured to broadcast the backhaul control information to the second network device and the third network device, so that the second network device and the third network device backhaul data according to the backhaul control information, characterized in that the first network device further comprises: • a first broadcast module, configured to broadcast a reference signal instruction message to the second network device and the third network device, wherein the reference signal instruction message is used to instruct one of the second and third network elements to send a reference signal on a resource indicated by the reference signal instruction message and the other of the second and third network elements that does not need to send the reference signal to measure the channel state information of the reference signal on the resource indicated by the reference signal instruction message. • a first broadcast module, configured to broadcast a reference signal instruction message to the second network device and the third network device, wherein the reference signal instruction message is used to instruct one of the second and third network elements to send a reference signal on a resource indicated by the reference signal instruction message and the other of the second and third network elements that does not need to send the reference signal to measure the channel state information of the reference signal on the resource indicated by the reference signal instruction message.